./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 14:01:33,420 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:01:33,489 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:01:33,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:01:33,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:01:33,506 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:01:33,507 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:01:33,507 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:01:33,507 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:01:33,508 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:01:33,508 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:01:33,508 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:01:33,509 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:01:33,509 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:01:33,509 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:01:33,510 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:01:33,510 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:01:33,510 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:01:33,511 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:01:33,511 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:01:33,511 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:01:33,512 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:01:33,512 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:01:33,512 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:01:33,513 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:01:33,513 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:01:33,513 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:01:33,513 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:01:33,514 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:01:33,514 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:01:33,514 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:01:33,515 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:01:33,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:01:33,515 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:01:33,515 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:01:33,516 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:01:33,516 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:01:33,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:01:33,516 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:01:33,516 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:01:33,517 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:01:33,517 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:01:33,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:01:33,518 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:01:33,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:01:33,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:01:33,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:01:33,748 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:01:33,749 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:01:33,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:01:34,863 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:01:35,057 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:01:35,057 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:01:35,074 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1455299f2/9afe7af9f400480da0f55725bb8dd974/FLAG28b664a89 [2024-06-14 14:01:35,084 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1455299f2/9afe7af9f400480da0f55725bb8dd974 [2024-06-14 14:01:35,086 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:01:35,086 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:01:35,087 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 14:01:35,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:01:35,213 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:01:35,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:01:35,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:01:35,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:01:35,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:01:35" (1/2) ... [2024-06-14 14:01:35,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bddf4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:35, skipping insertion in model container [2024-06-14 14:01:35,223 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:01:35" (1/2) ... [2024-06-14 14:01:35,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27294d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:35, skipping insertion in model container [2024-06-14 14:01:35,224 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:01:35" (2/2) ... [2024-06-14 14:01:35,225 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bddf4da and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35, skipping insertion in model container [2024-06-14 14:01:35,225 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:01:35" (2/2) ... [2024-06-14 14:01:35,225 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:01:35,275 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:01:35,276 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] ((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:01:35,276 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:01:35,276 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] ((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:01:35,277 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] ((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:01:35,277 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:01:35,277 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-06-14 14:01:35,311 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:01:35,591 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:01:35,599 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 14:01:35,702 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:01:35,756 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:01:35,757 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35 WrapperNode [2024-06-14 14:01:35,757 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:01:35,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:01:35,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:01:35,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:01:35,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,773 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,798 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-14 14:01:35,798 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:01:35,799 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:01:35,799 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:01:35,799 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:01:35,809 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,815 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,827 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 14:01:35,832 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,832 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,840 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,842 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,848 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,854 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,857 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:01:35,858 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:01:35,858 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:01:35,858 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:01:35,858 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (1/1) ... [2024-06-14 14:01:35,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:01:35,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:01:35,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 14:01:35,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 14:01:35,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:01:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:01:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:01:35,945 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:01:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:01:35,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:01:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:01:35,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:01:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 14:01:35,947 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 14:01:35,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:01:35,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:01:35,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:01:35,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:01:35,949 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 14:01:36,053 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:01:36,055 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:01:36,277 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:01:36,277 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:01:36,393 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:01:36,394 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:01:36,394 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:01:36 BoogieIcfgContainer [2024-06-14 14:01:36,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:01:36,397 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:01:36,397 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:01:36,400 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:01:36,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:01:35" (1/4) ... [2024-06-14 14:01:36,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b99fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:01:36, skipping insertion in model container [2024-06-14 14:01:36,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:01:35" (2/4) ... [2024-06-14 14:01:36,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b99fcc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:01:36, skipping insertion in model container [2024-06-14 14:01:36,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:01:35" (3/4) ... [2024-06-14 14:01:36,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b99fcc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:01:36, skipping insertion in model container [2024-06-14 14:01:36,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:01:36" (4/4) ... [2024-06-14 14:01:36,403 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:01:36,420 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:01:36,421 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 14:01:36,421 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:01:36,467 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:01:36,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 50 transitions, 116 flow [2024-06-14 14:01:36,528 INFO L124 PetriNetUnfolderBase]: 0/46 cut-off events. [2024-06-14 14:01:36,529 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:01:36,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 0/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 14:01:36,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 50 transitions, 116 flow [2024-06-14 14:01:36,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 40 transitions, 92 flow [2024-06-14 14:01:36,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:01:36,546 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;@1708a137, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:01:36,547 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 14:01:36,551 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:01:36,551 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:01:36,551 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:01:36,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:36,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:01:36,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:36,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1624042362, now seen corresponding path program 1 times [2024-06-14 14:01:36,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:36,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966470766] [2024-06-14 14:01:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:36,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:37,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:37,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966470766] [2024-06-14 14:01:37,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966470766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:37,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:37,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:01:37,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767985246] [2024-06-14 14:01:37,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:37,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:01:37,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:37,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:01:37,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:01:37,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:01:37,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:37,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:37,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:01:37,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:37,561 INFO L124 PetriNetUnfolderBase]: 2723/4050 cut-off events. [2024-06-14 14:01:37,561 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-14 14:01:37,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8052 conditions, 4050 events. 2723/4050 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22557 event pairs, 1898 based on Foata normal form. 1/3949 useless extension candidates. Maximal degree in co-relation 8036. Up to 3813 conditions per place. [2024-06-14 14:01:37,590 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 39 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-06-14 14:01:37,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 217 flow [2024-06-14 14:01:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:01:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:01:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-14 14:01:37,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-14 14:01:37,603 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 92 flow. Second operand 3 states and 102 transitions. [2024-06-14 14:01:37,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 217 flow [2024-06-14 14:01:37,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 210 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:37,612 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 127 flow [2024-06-14 14:01:37,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-14 14:01:37,618 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-14 14:01:37,618 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 127 flow [2024-06-14 14:01:37,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:37,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:37,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:37,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:01:37,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:37,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:37,621 INFO L85 PathProgramCache]: Analyzing trace with hash 962153061, now seen corresponding path program 1 times [2024-06-14 14:01:37,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:37,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893612026] [2024-06-14 14:01:37,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:37,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:37,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:37,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893612026] [2024-06-14 14:01:37,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893612026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:37,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:37,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:01:37,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188782882] [2024-06-14 14:01:37,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:37,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:01:37,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:37,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:01:37,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:01:37,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:37,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:37,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:37,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:37,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:38,452 INFO L124 PetriNetUnfolderBase]: 4385/6500 cut-off events. [2024-06-14 14:01:38,453 INFO L125 PetriNetUnfolderBase]: For 1123/1130 co-relation queries the response was YES. [2024-06-14 14:01:38,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14768 conditions, 6500 events. 4385/6500 cut-off events. For 1123/1130 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36228 event pairs, 1932 based on Foata normal form. 11/6500 useless extension candidates. Maximal degree in co-relation 14753. Up to 5945 conditions per place. [2024-06-14 14:01:38,484 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 60 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2024-06-14 14:01:38,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 81 transitions, 382 flow [2024-06-14 14:01:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:01:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:01:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-06-14 14:01:38,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-14 14:01:38,489 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 127 flow. Second operand 4 states and 135 transitions. [2024-06-14 14:01:38,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 81 transitions, 382 flow [2024-06-14 14:01:38,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:01:38,492 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 224 flow [2024-06-14 14:01:38,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-14 14:01:38,493 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2024-06-14 14:01:38,494 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 224 flow [2024-06-14 14:01:38,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:38,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:38,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:38,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:01:38,497 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:38,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1652682690, now seen corresponding path program 1 times [2024-06-14 14:01:38,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:38,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660761767] [2024-06-14 14:01:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:38,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:38,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:38,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660761767] [2024-06-14 14:01:38,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660761767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:38,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:38,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:38,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015686346] [2024-06-14 14:01:38,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:38,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:38,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:38,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:38,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:38,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:38,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 224 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:38,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:38,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:38,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:39,331 INFO L124 PetriNetUnfolderBase]: 4527/6714 cut-off events. [2024-06-14 14:01:39,332 INFO L125 PetriNetUnfolderBase]: For 4346/4366 co-relation queries the response was YES. [2024-06-14 14:01:39,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18080 conditions, 6714 events. 4527/6714 cut-off events. For 4346/4366 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37663 event pairs, 1443 based on Foata normal form. 46/6749 useless extension candidates. Maximal degree in co-relation 18062. Up to 5937 conditions per place. [2024-06-14 14:01:39,382 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 70 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-14 14:01:39,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 94 transitions, 512 flow [2024-06-14 14:01:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-14 14:01:39,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.656 [2024-06-14 14:01:39,387 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 224 flow. Second operand 5 states and 164 transitions. [2024-06-14 14:01:39,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 94 transitions, 512 flow [2024-06-14 14:01:39,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 508 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 14:01:39,393 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 279 flow [2024-06-14 14:01:39,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-14 14:01:39,394 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2024-06-14 14:01:39,395 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 279 flow [2024-06-14 14:01:39,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:39,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:39,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:39,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:01:39,396 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:39,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -24371892, now seen corresponding path program 1 times [2024-06-14 14:01:39,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:39,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228015914] [2024-06-14 14:01:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:39,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:39,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:39,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228015914] [2024-06-14 14:01:39,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228015914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:39,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:39,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:01:39,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493933222] [2024-06-14 14:01:39,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:39,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:01:39,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:01:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:01:39,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:01:39,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:39,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:39,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:01:39,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:40,144 INFO L124 PetriNetUnfolderBase]: 3542/5229 cut-off events. [2024-06-14 14:01:40,145 INFO L125 PetriNetUnfolderBase]: For 5883/5883 co-relation queries the response was YES. [2024-06-14 14:01:40,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15772 conditions, 5229 events. 3542/5229 cut-off events. For 5883/5883 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29183 event pairs, 1668 based on Foata normal form. 6/5226 useless extension candidates. Maximal degree in co-relation 15751. Up to 4874 conditions per place. [2024-06-14 14:01:40,173 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 54 selfloop transitions, 14 changer transitions 0/77 dead transitions. [2024-06-14 14:01:40,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 470 flow [2024-06-14 14:01:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:01:40,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:01:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-14 14:01:40,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-14 14:01:40,174 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 279 flow. Second operand 4 states and 129 transitions. [2024-06-14 14:01:40,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 470 flow [2024-06-14 14:01:40,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 435 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:40,178 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 308 flow [2024-06-14 14:01:40,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-14 14:01:40,179 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-14 14:01:40,179 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 308 flow [2024-06-14 14:01:40,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:40,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:40,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:40,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:01:40,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:40,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1947168201, now seen corresponding path program 1 times [2024-06-14 14:01:40,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:40,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792233621] [2024-06-14 14:01:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:40,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:40,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:40,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792233621] [2024-06-14 14:01:40,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792233621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:40,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:40,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:01:40,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245977948] [2024-06-14 14:01:40,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:40,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:01:40,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:40,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:01:40,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:01:40,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:01:40,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:40,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:40,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:01:40,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:40,979 INFO L124 PetriNetUnfolderBase]: 3655/5430 cut-off events. [2024-06-14 14:01:40,980 INFO L125 PetriNetUnfolderBase]: For 7448/7448 co-relation queries the response was YES. [2024-06-14 14:01:40,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16685 conditions, 5430 events. 3655/5430 cut-off events. For 7448/7448 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30384 event pairs, 1490 based on Foata normal form. 30/5451 useless extension candidates. Maximal degree in co-relation 16662. Up to 4863 conditions per place. [2024-06-14 14:01:41,011 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 65 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2024-06-14 14:01:41,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 566 flow [2024-06-14 14:01:41,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-14 14:01:41,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-14 14:01:41,016 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 308 flow. Second operand 5 states and 160 transitions. [2024-06-14 14:01:41,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 566 flow [2024-06-14 14:01:41,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 551 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 14:01:41,024 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 364 flow [2024-06-14 14:01:41,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=364, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-14 14:01:41,027 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 13 predicate places. [2024-06-14 14:01:41,027 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 364 flow [2024-06-14 14:01:41,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:41,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:41,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:41,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:01:41,028 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:41,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:41,028 INFO L85 PathProgramCache]: Analyzing trace with hash 38632552, now seen corresponding path program 1 times [2024-06-14 14:01:41,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:41,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403284417] [2024-06-14 14:01:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:41,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:41,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:41,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403284417] [2024-06-14 14:01:41,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403284417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:41,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:41,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:01:41,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101241619] [2024-06-14 14:01:41,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:41,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:01:41,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:01:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:01:41,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:41,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 364 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:41,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:41,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:41,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:41,946 INFO L124 PetriNetUnfolderBase]: 4565/6736 cut-off events. [2024-06-14 14:01:41,946 INFO L125 PetriNetUnfolderBase]: For 12227/12229 co-relation queries the response was YES. [2024-06-14 14:01:41,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21807 conditions, 6736 events. 4565/6736 cut-off events. For 12227/12229 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 37273 event pairs, 1849 based on Foata normal form. 5/6735 useless extension candidates. Maximal degree in co-relation 21782. Up to 6310 conditions per place. [2024-06-14 14:01:41,977 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 73 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-14 14:01:41,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 95 transitions, 682 flow [2024-06-14 14:01:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:01:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:01:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-14 14:01:41,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 14:01:41,979 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 364 flow. Second operand 4 states and 124 transitions. [2024-06-14 14:01:41,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 95 transitions, 682 flow [2024-06-14 14:01:41,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 637 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:41,992 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 452 flow [2024-06-14 14:01:41,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=452, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2024-06-14 14:01:41,993 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-06-14 14:01:41,993 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 452 flow [2024-06-14 14:01:41,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:41,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:41,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:41,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:01:41,994 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:41,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:41,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1481283978, now seen corresponding path program 1 times [2024-06-14 14:01:41,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:41,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733625645] [2024-06-14 14:01:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:41,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:42,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:42,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733625645] [2024-06-14 14:01:42,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733625645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:42,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:42,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:42,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219949404] [2024-06-14 14:01:42,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:42,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:42,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:42,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:42,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:42,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:42,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 452 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:42,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:42,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:42,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:42,794 INFO L124 PetriNetUnfolderBase]: 4606/6785 cut-off events. [2024-06-14 14:01:42,795 INFO L125 PetriNetUnfolderBase]: For 18138/18144 co-relation queries the response was YES. [2024-06-14 14:01:42,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24098 conditions, 6785 events. 4606/6785 cut-off events. For 18138/18144 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37772 event pairs, 1275 based on Foata normal form. 19/6793 useless extension candidates. Maximal degree in co-relation 24071. Up to 5615 conditions per place. [2024-06-14 14:01:42,839 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 85 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-14 14:01:42,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 113 transitions, 817 flow [2024-06-14 14:01:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-14 14:01:42,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632 [2024-06-14 14:01:42,841 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 452 flow. Second operand 5 states and 158 transitions. [2024-06-14 14:01:42,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 113 transitions, 817 flow [2024-06-14 14:01:42,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 803 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-14 14:01:42,857 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 531 flow [2024-06-14 14:01:42,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=531, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2024-06-14 14:01:42,858 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 20 predicate places. [2024-06-14 14:01:42,858 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 531 flow [2024-06-14 14:01:42,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:42,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:42,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:42,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:01:42,859 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:42,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:42,859 INFO L85 PathProgramCache]: Analyzing trace with hash 258507596, now seen corresponding path program 1 times [2024-06-14 14:01:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:42,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129402258] [2024-06-14 14:01:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:42,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:43,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:43,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129402258] [2024-06-14 14:01:43,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129402258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:43,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:43,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:43,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127321498] [2024-06-14 14:01:43,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:43,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:43,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:43,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:43,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:43,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:43,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 531 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:43,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:43,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:43,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:43,713 INFO L124 PetriNetUnfolderBase]: 4567/6764 cut-off events. [2024-06-14 14:01:43,713 INFO L125 PetriNetUnfolderBase]: For 22467/22473 co-relation queries the response was YES. [2024-06-14 14:01:43,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25086 conditions, 6764 events. 4567/6764 cut-off events. For 22467/22473 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37769 event pairs, 990 based on Foata normal form. 19/6772 useless extension candidates. Maximal degree in co-relation 25056. Up to 5597 conditions per place. [2024-06-14 14:01:43,764 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 82 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-06-14 14:01:43,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 808 flow [2024-06-14 14:01:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-14 14:01:43,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 14:01:43,765 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 531 flow. Second operand 5 states and 155 transitions. [2024-06-14 14:01:43,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 808 flow [2024-06-14 14:01:43,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 781 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 14:01:43,791 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 537 flow [2024-06-14 14:01:43,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-14 14:01:43,792 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 23 predicate places. [2024-06-14 14:01:43,792 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 537 flow [2024-06-14 14:01:43,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:43,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:43,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:43,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:01:43,793 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:43,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1196613548, now seen corresponding path program 1 times [2024-06-14 14:01:43,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:43,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896789129] [2024-06-14 14:01:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:43,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:43,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:43,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896789129] [2024-06-14 14:01:43,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896789129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:43,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:43,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:01:43,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030828164] [2024-06-14 14:01:43,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:43,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:01:43,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:01:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:01:44,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:01:44,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 537 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:44,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:44,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:01:44,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:44,556 INFO L124 PetriNetUnfolderBase]: 4399/6619 cut-off events. [2024-06-14 14:01:44,556 INFO L125 PetriNetUnfolderBase]: For 26086/26101 co-relation queries the response was YES. [2024-06-14 14:01:44,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25249 conditions, 6619 events. 4399/6619 cut-off events. For 26086/26101 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 38014 event pairs, 1741 based on Foata normal form. 10/6615 useless extension candidates. Maximal degree in co-relation 25217. Up to 5900 conditions per place. [2024-06-14 14:01:44,600 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 75 selfloop transitions, 33 changer transitions 0/119 dead transitions. [2024-06-14 14:01:44,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 119 transitions, 989 flow [2024-06-14 14:01:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-14 14:01:44,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.636 [2024-06-14 14:01:44,602 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 537 flow. Second operand 5 states and 159 transitions. [2024-06-14 14:01:44,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 119 transitions, 989 flow [2024-06-14 14:01:44,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 119 transitions, 933 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:44,633 INFO L231 Difference]: Finished difference. Result has 78 places, 94 transitions, 700 flow [2024-06-14 14:01:44,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=700, PETRI_PLACES=78, PETRI_TRANSITIONS=94} [2024-06-14 14:01:44,634 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 25 predicate places. [2024-06-14 14:01:44,634 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 94 transitions, 700 flow [2024-06-14 14:01:44,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:44,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:44,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:44,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:01:44,635 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:44,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1884881742, now seen corresponding path program 2 times [2024-06-14 14:01:44,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:44,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718196025] [2024-06-14 14:01:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:44,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:44,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:44,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718196025] [2024-06-14 14:01:44,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718196025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:44,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:44,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:01:44,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228110142] [2024-06-14 14:01:44,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:44,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:01:44,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:44,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:01:44,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:01:44,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:01:44,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 700 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:44,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:44,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:01:44,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:45,387 INFO L124 PetriNetUnfolderBase]: 4454/6718 cut-off events. [2024-06-14 14:01:45,387 INFO L125 PetriNetUnfolderBase]: For 33374/33391 co-relation queries the response was YES. [2024-06-14 14:01:45,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27928 conditions, 6718 events. 4454/6718 cut-off events. For 33374/33391 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 38659 event pairs, 1723 based on Foata normal form. 12/6721 useless extension candidates. Maximal degree in co-relation 27894. Up to 6022 conditions per place. [2024-06-14 14:01:45,442 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 90 selfloop transitions, 31 changer transitions 0/132 dead transitions. [2024-06-14 14:01:45,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 132 transitions, 1141 flow [2024-06-14 14:01:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-14 14:01:45,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648 [2024-06-14 14:01:45,444 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 700 flow. Second operand 5 states and 162 transitions. [2024-06-14 14:01:45,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 132 transitions, 1141 flow [2024-06-14 14:01:45,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 132 transitions, 1109 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-14 14:01:45,502 INFO L231 Difference]: Finished difference. Result has 84 places, 103 transitions, 871 flow [2024-06-14 14:01:45,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=871, PETRI_PLACES=84, PETRI_TRANSITIONS=103} [2024-06-14 14:01:45,504 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 31 predicate places. [2024-06-14 14:01:45,505 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 103 transitions, 871 flow [2024-06-14 14:01:45,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:45,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:45,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:45,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:01:45,506 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:45,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1751626448, now seen corresponding path program 1 times [2024-06-14 14:01:45,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:45,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052980740] [2024-06-14 14:01:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:45,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:45,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:45,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052980740] [2024-06-14 14:01:45,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052980740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:45,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:45,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:45,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004665314] [2024-06-14 14:01:45,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:45,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:45,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:45,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:45,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:45,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:45,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 103 transitions, 871 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:45,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:45,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:45,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:46,422 INFO L124 PetriNetUnfolderBase]: 4700/6992 cut-off events. [2024-06-14 14:01:46,422 INFO L125 PetriNetUnfolderBase]: For 38838/38862 co-relation queries the response was YES. [2024-06-14 14:01:46,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29536 conditions, 6992 events. 4700/6992 cut-off events. For 38838/38862 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 39710 event pairs, 1793 based on Foata normal form. 24/7005 useless extension candidates. Maximal degree in co-relation 29498. Up to 6271 conditions per place. [2024-06-14 14:01:46,478 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 85 selfloop transitions, 44 changer transitions 0/137 dead transitions. [2024-06-14 14:01:46,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 137 transitions, 1336 flow [2024-06-14 14:01:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-14 14:01:46,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.636 [2024-06-14 14:01:46,480 INFO L175 Difference]: Start difference. First operand has 84 places, 103 transitions, 871 flow. Second operand 5 states and 159 transitions. [2024-06-14 14:01:46,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 137 transitions, 1336 flow [2024-06-14 14:01:46,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 137 transitions, 1266 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:46,544 INFO L231 Difference]: Finished difference. Result has 86 places, 107 transitions, 955 flow [2024-06-14 14:01:46,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=955, PETRI_PLACES=86, PETRI_TRANSITIONS=107} [2024-06-14 14:01:46,545 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 33 predicate places. [2024-06-14 14:01:46,545 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 107 transitions, 955 flow [2024-06-14 14:01:46,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:46,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:46,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:46,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:01:46,546 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:46,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:46,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1774065829, now seen corresponding path program 1 times [2024-06-14 14:01:46,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:46,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764532548] [2024-06-14 14:01:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:46,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:46,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:46,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764532548] [2024-06-14 14:01:46,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764532548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:46,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:46,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:46,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170791557] [2024-06-14 14:01:46,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:46,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:46,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:46,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:46,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:46,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:46,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 107 transitions, 955 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:46,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:46,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:46,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:47,436 INFO L124 PetriNetUnfolderBase]: 4759/7064 cut-off events. [2024-06-14 14:01:47,437 INFO L125 PetriNetUnfolderBase]: For 37740/37757 co-relation queries the response was YES. [2024-06-14 14:01:47,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29964 conditions, 7064 events. 4759/7064 cut-off events. For 37740/37757 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 39767 event pairs, 1735 based on Foata normal form. 17/7076 useless extension candidates. Maximal degree in co-relation 29926. Up to 6508 conditions per place. [2024-06-14 14:01:47,491 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 96 selfloop transitions, 31 changer transitions 0/135 dead transitions. [2024-06-14 14:01:47,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 135 transitions, 1364 flow [2024-06-14 14:01:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-14 14:01:47,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.588 [2024-06-14 14:01:47,493 INFO L175 Difference]: Start difference. First operand has 86 places, 107 transitions, 955 flow. Second operand 5 states and 147 transitions. [2024-06-14 14:01:47,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 135 transitions, 1364 flow [2024-06-14 14:01:47,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 135 transitions, 1231 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:47,573 INFO L231 Difference]: Finished difference. Result has 89 places, 118 transitions, 1015 flow [2024-06-14 14:01:47,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1015, PETRI_PLACES=89, PETRI_TRANSITIONS=118} [2024-06-14 14:01:47,574 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 36 predicate places. [2024-06-14 14:01:47,574 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 118 transitions, 1015 flow [2024-06-14 14:01:47,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:47,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:47,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:47,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:01:47,576 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:47,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1774065488, now seen corresponding path program 2 times [2024-06-14 14:01:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:47,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609967647] [2024-06-14 14:01:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:47,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:47,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:47,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609967647] [2024-06-14 14:01:47,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609967647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:47,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:47,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:47,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641720033] [2024-06-14 14:01:47,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:47,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:47,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:47,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:47,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:47,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:47,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 118 transitions, 1015 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:47,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:47,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:47,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:48,521 INFO L124 PetriNetUnfolderBase]: 4740/7062 cut-off events. [2024-06-14 14:01:48,521 INFO L125 PetriNetUnfolderBase]: For 46773/46792 co-relation queries the response was YES. [2024-06-14 14:01:48,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31832 conditions, 7062 events. 4740/7062 cut-off events. For 46773/46792 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 40026 event pairs, 1735 based on Foata normal form. 20/7077 useless extension candidates. Maximal degree in co-relation 31793. Up to 6400 conditions per place. [2024-06-14 14:01:48,566 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 107 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2024-06-14 14:01:48,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 1365 flow [2024-06-14 14:01:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-14 14:01:48,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632 [2024-06-14 14:01:48,568 INFO L175 Difference]: Start difference. First operand has 89 places, 118 transitions, 1015 flow. Second operand 5 states and 158 transitions. [2024-06-14 14:01:48,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 1365 flow [2024-06-14 14:01:48,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 146 transitions, 1308 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-14 14:01:48,635 INFO L231 Difference]: Finished difference. Result has 93 places, 118 transitions, 1038 flow [2024-06-14 14:01:48,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1038, PETRI_PLACES=93, PETRI_TRANSITIONS=118} [2024-06-14 14:01:48,636 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 40 predicate places. [2024-06-14 14:01:48,636 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 118 transitions, 1038 flow [2024-06-14 14:01:48,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:48,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:48,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:48,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:01:48,637 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:48,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:48,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1698005531, now seen corresponding path program 2 times [2024-06-14 14:01:48,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:48,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412139953] [2024-06-14 14:01:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:48,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:48,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:48,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412139953] [2024-06-14 14:01:48,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412139953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:48,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:48,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:48,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472844480] [2024-06-14 14:01:48,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:48,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:48,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:48,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:48,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:48,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 118 transitions, 1038 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:48,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:48,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:48,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:49,381 INFO L124 PetriNetUnfolderBase]: 4754/7038 cut-off events. [2024-06-14 14:01:49,381 INFO L125 PetriNetUnfolderBase]: For 50840/50859 co-relation queries the response was YES. [2024-06-14 14:01:49,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32529 conditions, 7038 events. 4754/7038 cut-off events. For 50840/50859 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39396 event pairs, 1749 based on Foata normal form. 19/7046 useless extension candidates. Maximal degree in co-relation 32488. Up to 6463 conditions per place. [2024-06-14 14:01:49,431 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 103 selfloop transitions, 42 changer transitions 0/153 dead transitions. [2024-06-14 14:01:49,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 153 transitions, 1572 flow [2024-06-14 14:01:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-14 14:01:49,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-14 14:01:49,433 INFO L175 Difference]: Start difference. First operand has 93 places, 118 transitions, 1038 flow. Second operand 5 states and 151 transitions. [2024-06-14 14:01:49,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 153 transitions, 1572 flow [2024-06-14 14:01:49,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1510 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:49,509 INFO L231 Difference]: Finished difference. Result has 95 places, 132 transitions, 1244 flow [2024-06-14 14:01:49,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1244, PETRI_PLACES=95, PETRI_TRANSITIONS=132} [2024-06-14 14:01:49,510 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 42 predicate places. [2024-06-14 14:01:49,510 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 132 transitions, 1244 flow [2024-06-14 14:01:49,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:49,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:49,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:49,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:01:49,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:49,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1153649519, now seen corresponding path program 1 times [2024-06-14 14:01:49,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:49,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509578771] [2024-06-14 14:01:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:49,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:49,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:49,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509578771] [2024-06-14 14:01:49,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509578771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:49,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:49,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:49,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799867378] [2024-06-14 14:01:49,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:49,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:49,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:49,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:49,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:49,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:49,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 132 transitions, 1244 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:49,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:49,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:49,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:50,301 INFO L124 PetriNetUnfolderBase]: 4802/7183 cut-off events. [2024-06-14 14:01:50,301 INFO L125 PetriNetUnfolderBase]: For 61781/61787 co-relation queries the response was YES. [2024-06-14 14:01:50,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35159 conditions, 7183 events. 4802/7183 cut-off events. For 61781/61787 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 40857 event pairs, 1719 based on Foata normal form. 5/7182 useless extension candidates. Maximal degree in co-relation 35116. Up to 6525 conditions per place. [2024-06-14 14:01:50,350 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 151 selfloop transitions, 32 changer transitions 0/191 dead transitions. [2024-06-14 14:01:50,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 191 transitions, 2054 flow [2024-06-14 14:01:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-14 14:01:50,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2024-06-14 14:01:50,352 INFO L175 Difference]: Start difference. First operand has 95 places, 132 transitions, 1244 flow. Second operand 6 states and 182 transitions. [2024-06-14 14:01:50,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 191 transitions, 2054 flow [2024-06-14 14:01:50,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 191 transitions, 1974 flow, removed 40 selfloop flow, removed 0 redundant places. [2024-06-14 14:01:50,435 INFO L231 Difference]: Finished difference. Result has 103 places, 152 transitions, 1451 flow [2024-06-14 14:01:50,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1451, PETRI_PLACES=103, PETRI_TRANSITIONS=152} [2024-06-14 14:01:50,436 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 50 predicate places. [2024-06-14 14:01:50,436 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 152 transitions, 1451 flow [2024-06-14 14:01:50,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:50,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:50,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:50,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:01:50,437 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:50,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:50,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1698206969, now seen corresponding path program 2 times [2024-06-14 14:01:50,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:50,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356844235] [2024-06-14 14:01:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:50,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:50,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:50,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356844235] [2024-06-14 14:01:50,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356844235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:50,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:50,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:50,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040189430] [2024-06-14 14:01:50,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:50,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:50,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:50,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:50,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 152 transitions, 1451 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:50,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:50,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:50,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:51,388 INFO L124 PetriNetUnfolderBase]: 4828/7224 cut-off events. [2024-06-14 14:01:51,388 INFO L125 PetriNetUnfolderBase]: For 67786/67792 co-relation queries the response was YES. [2024-06-14 14:01:51,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36282 conditions, 7224 events. 4828/7224 cut-off events. For 67786/67792 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 41075 event pairs, 1720 based on Foata normal form. 5/7223 useless extension candidates. Maximal degree in co-relation 36234. Up to 6585 conditions per place. [2024-06-14 14:01:51,460 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 155 selfloop transitions, 27 changer transitions 0/190 dead transitions. [2024-06-14 14:01:51,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 190 transitions, 2118 flow [2024-06-14 14:01:51,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-14 14:01:51,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 14:01:51,461 INFO L175 Difference]: Start difference. First operand has 103 places, 152 transitions, 1451 flow. Second operand 5 states and 155 transitions. [2024-06-14 14:01:51,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 190 transitions, 2118 flow [2024-06-14 14:01:51,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 190 transitions, 2040 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-14 14:01:51,569 INFO L231 Difference]: Finished difference. Result has 108 places, 159 transitions, 1531 flow [2024-06-14 14:01:51,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1531, PETRI_PLACES=108, PETRI_TRANSITIONS=159} [2024-06-14 14:01:51,570 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 55 predicate places. [2024-06-14 14:01:51,570 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 159 transitions, 1531 flow [2024-06-14 14:01:51,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:51,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:51,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:51,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:01:51,571 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:51,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:51,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1697999579, now seen corresponding path program 3 times [2024-06-14 14:01:51,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:51,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633474639] [2024-06-14 14:01:51,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:51,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:51,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:51,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633474639] [2024-06-14 14:01:51,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633474639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:51,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:51,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:51,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055756676] [2024-06-14 14:01:51,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:51,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:51,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:51,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:51,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:51,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:51,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 159 transitions, 1531 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:51,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:51,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:51,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:52,432 INFO L124 PetriNetUnfolderBase]: 4831/7231 cut-off events. [2024-06-14 14:01:52,432 INFO L125 PetriNetUnfolderBase]: For 75936/75942 co-relation queries the response was YES. [2024-06-14 14:01:52,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37361 conditions, 7231 events. 4831/7231 cut-off events. For 75936/75942 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 41110 event pairs, 1715 based on Foata normal form. 9/7234 useless extension candidates. Maximal degree in co-relation 37310. Up to 6591 conditions per place. [2024-06-14 14:01:52,488 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 158 selfloop transitions, 35 changer transitions 0/201 dead transitions. [2024-06-14 14:01:52,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 201 transitions, 2180 flow [2024-06-14 14:01:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:52,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-14 14:01:52,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5828571428571429 [2024-06-14 14:01:52,490 INFO L175 Difference]: Start difference. First operand has 108 places, 159 transitions, 1531 flow. Second operand 7 states and 204 transitions. [2024-06-14 14:01:52,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 201 transitions, 2180 flow [2024-06-14 14:01:52,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 201 transitions, 2096 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:52,609 INFO L231 Difference]: Finished difference. Result has 112 places, 164 transitions, 1589 flow [2024-06-14 14:01:52,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1589, PETRI_PLACES=112, PETRI_TRANSITIONS=164} [2024-06-14 14:01:52,609 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 59 predicate places. [2024-06-14 14:01:52,609 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 164 transitions, 1589 flow [2024-06-14 14:01:52,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:52,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:52,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:52,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:01:52,610 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:52,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1697991643, now seen corresponding path program 1 times [2024-06-14 14:01:52,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:52,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39665998] [2024-06-14 14:01:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:52,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39665998] [2024-06-14 14:01:52,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39665998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:52,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:52,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:52,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514000508] [2024-06-14 14:01:52,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:52,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:52,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:52,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:52,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:52,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:52,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 164 transitions, 1589 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:52,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:52,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:52,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:53,501 INFO L124 PetriNetUnfolderBase]: 4881/7299 cut-off events. [2024-06-14 14:01:53,501 INFO L125 PetriNetUnfolderBase]: For 84641/84647 co-relation queries the response was YES. [2024-06-14 14:01:53,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38282 conditions, 7299 events. 4881/7299 cut-off events. For 84641/84647 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 41530 event pairs, 1709 based on Foata normal form. 18/7311 useless extension candidates. Maximal degree in co-relation 38230. Up to 6672 conditions per place. [2024-06-14 14:01:53,554 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 168 selfloop transitions, 18 changer transitions 0/194 dead transitions. [2024-06-14 14:01:53,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 194 transitions, 2151 flow [2024-06-14 14:01:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-14 14:01:53,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:01:53,555 INFO L175 Difference]: Start difference. First operand has 112 places, 164 transitions, 1589 flow. Second operand 5 states and 150 transitions. [2024-06-14 14:01:53,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 194 transitions, 2151 flow [2024-06-14 14:01:53,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 194 transitions, 2057 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:53,672 INFO L231 Difference]: Finished difference. Result has 112 places, 167 transitions, 1592 flow [2024-06-14 14:01:53,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1592, PETRI_PLACES=112, PETRI_TRANSITIONS=167} [2024-06-14 14:01:53,673 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 59 predicate places. [2024-06-14 14:01:53,673 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 167 transitions, 1592 flow [2024-06-14 14:01:53,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:53,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:53,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:53,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:01:53,674 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:53,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:53,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1980388243, now seen corresponding path program 1 times [2024-06-14 14:01:53,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:53,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729716304] [2024-06-14 14:01:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:53,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:53,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:53,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729716304] [2024-06-14 14:01:53,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729716304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:53,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:53,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:01:53,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334465927] [2024-06-14 14:01:53,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:53,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:01:53,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:01:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:01:53,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:01:53,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 167 transitions, 1592 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:53,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:53,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:01:53,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:54,437 INFO L124 PetriNetUnfolderBase]: 4603/6897 cut-off events. [2024-06-14 14:01:54,437 INFO L125 PetriNetUnfolderBase]: For 100658/100693 co-relation queries the response was YES. [2024-06-14 14:01:54,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38037 conditions, 6897 events. 4603/6897 cut-off events. For 100658/100693 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 39910 event pairs, 1625 based on Foata normal form. 8/6770 useless extension candidates. Maximal degree in co-relation 37984. Up to 6211 conditions per place. [2024-06-14 14:01:54,496 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 146 selfloop transitions, 16 changer transitions 0/180 dead transitions. [2024-06-14 14:01:54,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 180 transitions, 1968 flow [2024-06-14 14:01:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:01:54,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:01:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-14 14:01:54,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:01:54,498 INFO L175 Difference]: Start difference. First operand has 112 places, 167 transitions, 1592 flow. Second operand 4 states and 120 transitions. [2024-06-14 14:01:54,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 180 transitions, 1968 flow [2024-06-14 14:01:54,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 180 transitions, 1903 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:54,629 INFO L231 Difference]: Finished difference. Result has 114 places, 169 transitions, 1609 flow [2024-06-14 14:01:54,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1609, PETRI_PLACES=114, PETRI_TRANSITIONS=169} [2024-06-14 14:01:54,629 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 61 predicate places. [2024-06-14 14:01:54,629 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 169 transitions, 1609 flow [2024-06-14 14:01:54,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:54,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:54,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:54,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:01:54,630 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:54,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1450151417, now seen corresponding path program 1 times [2024-06-14 14:01:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:54,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593600478] [2024-06-14 14:01:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:54,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:54,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:54,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593600478] [2024-06-14 14:01:54,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593600478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:54,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:54,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:54,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387672048] [2024-06-14 14:01:54,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:54,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:54,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:54,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:54,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:54,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:54,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 169 transitions, 1609 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:54,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:54,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:54,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:55,648 INFO L124 PetriNetUnfolderBase]: 5162/7712 cut-off events. [2024-06-14 14:01:55,649 INFO L125 PetriNetUnfolderBase]: For 104847/104868 co-relation queries the response was YES. [2024-06-14 14:01:55,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41939 conditions, 7712 events. 5162/7712 cut-off events. For 104847/104868 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44353 event pairs, 1718 based on Foata normal form. 24/7725 useless extension candidates. Maximal degree in co-relation 41884. Up to 6479 conditions per place. [2024-06-14 14:01:55,717 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 131 selfloop transitions, 106 changer transitions 0/245 dead transitions. [2024-06-14 14:01:55,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 245 transitions, 2844 flow [2024-06-14 14:01:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-06-14 14:01:55,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022222222222222 [2024-06-14 14:01:55,720 INFO L175 Difference]: Start difference. First operand has 114 places, 169 transitions, 1609 flow. Second operand 9 states and 271 transitions. [2024-06-14 14:01:55,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 245 transitions, 2844 flow [2024-06-14 14:01:55,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 245 transitions, 2826 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-14 14:01:55,906 INFO L231 Difference]: Finished difference. Result has 125 places, 194 transitions, 2156 flow [2024-06-14 14:01:55,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2156, PETRI_PLACES=125, PETRI_TRANSITIONS=194} [2024-06-14 14:01:55,906 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 72 predicate places. [2024-06-14 14:01:55,906 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 194 transitions, 2156 flow [2024-06-14 14:01:55,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:55,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:55,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:55,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:01:55,907 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:55,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:55,907 INFO L85 PathProgramCache]: Analyzing trace with hash -838533317, now seen corresponding path program 2 times [2024-06-14 14:01:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:55,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169378337] [2024-06-14 14:01:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:56,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:56,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169378337] [2024-06-14 14:01:56,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169378337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:56,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:56,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:56,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951388878] [2024-06-14 14:01:56,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:56,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:56,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:56,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:56,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:56,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 194 transitions, 2156 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:56,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:56,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:56,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:57,000 INFO L124 PetriNetUnfolderBase]: 5496/8236 cut-off events. [2024-06-14 14:01:57,000 INFO L125 PetriNetUnfolderBase]: For 129953/129972 co-relation queries the response was YES. [2024-06-14 14:01:57,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49629 conditions, 8236 events. 5496/8236 cut-off events. For 129953/129972 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 47964 event pairs, 1722 based on Foata normal form. 22/8253 useless extension candidates. Maximal degree in co-relation 49569. Up to 7088 conditions per place. [2024-06-14 14:01:57,076 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 176 selfloop transitions, 93 changer transitions 0/277 dead transitions. [2024-06-14 14:01:57,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 277 transitions, 3562 flow [2024-06-14 14:01:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-14 14:01:57,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:01:57,077 INFO L175 Difference]: Start difference. First operand has 125 places, 194 transitions, 2156 flow. Second operand 8 states and 240 transitions. [2024-06-14 14:01:57,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 277 transitions, 3562 flow [2024-06-14 14:01:57,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 277 transitions, 3308 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:57,367 INFO L231 Difference]: Finished difference. Result has 132 places, 231 transitions, 2723 flow [2024-06-14 14:01:57,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2723, PETRI_PLACES=132, PETRI_TRANSITIONS=231} [2024-06-14 14:01:57,368 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 79 predicate places. [2024-06-14 14:01:57,368 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 231 transitions, 2723 flow [2024-06-14 14:01:57,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:57,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:57,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:57,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:01:57,369 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:57,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:57,369 INFO L85 PathProgramCache]: Analyzing trace with hash -838543547, now seen corresponding path program 3 times [2024-06-14 14:01:57,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:57,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397979354] [2024-06-14 14:01:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:57,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:57,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:57,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397979354] [2024-06-14 14:01:57,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397979354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:57,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:57,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:57,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666603326] [2024-06-14 14:01:57,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:57,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:57,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:57,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:57,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:57,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:57,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 231 transitions, 2723 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:57,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:57,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:57,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:58,567 INFO L124 PetriNetUnfolderBase]: 5480/8219 cut-off events. [2024-06-14 14:01:58,568 INFO L125 PetriNetUnfolderBase]: For 142941/142961 co-relation queries the response was YES. [2024-06-14 14:01:58,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51228 conditions, 8219 events. 5480/8219 cut-off events. For 142941/142961 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 47831 event pairs, 1723 based on Foata normal form. 22/8236 useless extension candidates. Maximal degree in co-relation 51164. Up to 7078 conditions per place. [2024-06-14 14:01:58,650 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 183 selfloop transitions, 90 changer transitions 0/281 dead transitions. [2024-06-14 14:01:58,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 281 transitions, 3709 flow [2024-06-14 14:01:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-14 14:01:58,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-14 14:01:58,651 INFO L175 Difference]: Start difference. First operand has 132 places, 231 transitions, 2723 flow. Second operand 7 states and 220 transitions. [2024-06-14 14:01:58,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 281 transitions, 3709 flow [2024-06-14 14:01:58,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 281 transitions, 3566 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:58,938 INFO L231 Difference]: Finished difference. Result has 138 places, 237 transitions, 2972 flow [2024-06-14 14:01:58,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2972, PETRI_PLACES=138, PETRI_TRANSITIONS=237} [2024-06-14 14:01:58,939 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 85 predicate places. [2024-06-14 14:01:58,939 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 237 transitions, 2972 flow [2024-06-14 14:01:58,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:58,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:58,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:58,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:01:58,939 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:01:58,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1098563077, now seen corresponding path program 4 times [2024-06-14 14:01:58,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:58,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184701103] [2024-06-14 14:01:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:58,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:59,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184701103] [2024-06-14 14:01:59,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184701103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:59,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:59,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:59,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975438726] [2024-06-14 14:01:59,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:59,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:59,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:59,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:59,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:59,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:01:59,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 237 transitions, 2972 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:59,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:59,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:01:59,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:00,295 INFO L124 PetriNetUnfolderBase]: 5790/8673 cut-off events. [2024-06-14 14:02:00,295 INFO L125 PetriNetUnfolderBase]: For 161519/161539 co-relation queries the response was YES. [2024-06-14 14:02:00,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55662 conditions, 8673 events. 5790/8673 cut-off events. For 161519/161539 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50846 event pairs, 1723 based on Foata normal form. 22/8684 useless extension candidates. Maximal degree in co-relation 55594. Up to 7145 conditions per place. [2024-06-14 14:02:00,395 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 172 selfloop transitions, 148 changer transitions 0/328 dead transitions. [2024-06-14 14:02:00,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 328 transitions, 4590 flow [2024-06-14 14:02:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 272 transitions. [2024-06-14 14:02:00,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6044444444444445 [2024-06-14 14:02:00,396 INFO L175 Difference]: Start difference. First operand has 138 places, 237 transitions, 2972 flow. Second operand 9 states and 272 transitions. [2024-06-14 14:02:00,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 328 transitions, 4590 flow [2024-06-14 14:02:00,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 328 transitions, 4453 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 14:02:00,757 INFO L231 Difference]: Finished difference. Result has 146 places, 274 transitions, 3721 flow [2024-06-14 14:02:00,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2835, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3721, PETRI_PLACES=146, PETRI_TRANSITIONS=274} [2024-06-14 14:02:00,758 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 93 predicate places. [2024-06-14 14:02:00,758 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 274 transitions, 3721 flow [2024-06-14 14:02:00,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:00,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:00,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:00,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:02:00,759 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:00,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash -438149493, now seen corresponding path program 1 times [2024-06-14 14:02:00,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:00,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575125088] [2024-06-14 14:02:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:00,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:00,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:00,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575125088] [2024-06-14 14:02:00,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575125088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:00,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:00,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:02:00,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207978892] [2024-06-14 14:02:00,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:00,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:02:00,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:00,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:02:00,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:02:01,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:02:01,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 274 transitions, 3721 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:01,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:01,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:02:01,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:02,109 INFO L124 PetriNetUnfolderBase]: 5928/8844 cut-off events. [2024-06-14 14:02:02,109 INFO L125 PetriNetUnfolderBase]: For 208511/208537 co-relation queries the response was YES. [2024-06-14 14:02:02,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61967 conditions, 8844 events. 5928/8844 cut-off events. For 208511/208537 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52119 event pairs, 1478 based on Foata normal form. 29/8849 useless extension candidates. Maximal degree in co-relation 61896. Up to 7108 conditions per place. [2024-06-14 14:02:02,200 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 231 selfloop transitions, 71 changer transitions 0/322 dead transitions. [2024-06-14 14:02:02,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 322 transitions, 4851 flow [2024-06-14 14:02:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-14 14:02:02,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-14 14:02:02,202 INFO L175 Difference]: Start difference. First operand has 146 places, 274 transitions, 3721 flow. Second operand 6 states and 195 transitions. [2024-06-14 14:02:02,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 322 transitions, 4851 flow [2024-06-14 14:02:02,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 322 transitions, 4652 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-14 14:02:02,691 INFO L231 Difference]: Finished difference. Result has 149 places, 280 transitions, 3810 flow [2024-06-14 14:02:02,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3526, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3810, PETRI_PLACES=149, PETRI_TRANSITIONS=280} [2024-06-14 14:02:02,692 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 96 predicate places. [2024-06-14 14:02:02,692 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 280 transitions, 3810 flow [2024-06-14 14:02:02,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:02,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:02,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:02,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:02:02,693 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:02,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:02,693 INFO L85 PathProgramCache]: Analyzing trace with hash -325064659, now seen corresponding path program 2 times [2024-06-14 14:02:02,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:02,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211512222] [2024-06-14 14:02:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:02,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:02,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:02,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211512222] [2024-06-14 14:02:02,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211512222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:02,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:02,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:02:02,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591237441] [2024-06-14 14:02:02,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:02,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:02:02,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:02,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:02:02,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:02:03,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:02:03,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 280 transitions, 3810 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:03,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:03,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:02:03,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:04,116 INFO L124 PetriNetUnfolderBase]: 6071/9043 cut-off events. [2024-06-14 14:02:04,117 INFO L125 PetriNetUnfolderBase]: For 226174/226200 co-relation queries the response was YES. [2024-06-14 14:02:04,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64235 conditions, 9043 events. 6071/9043 cut-off events. For 226174/226200 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53379 event pairs, 1769 based on Foata normal form. 29/9048 useless extension candidates. Maximal degree in co-relation 64162. Up to 7781 conditions per place. [2024-06-14 14:02:04,209 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 228 selfloop transitions, 68 changer transitions 0/316 dead transitions. [2024-06-14 14:02:04,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 316 transitions, 4750 flow [2024-06-14 14:02:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-14 14:02:04,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2024-06-14 14:02:04,211 INFO L175 Difference]: Start difference. First operand has 149 places, 280 transitions, 3810 flow. Second operand 6 states and 187 transitions. [2024-06-14 14:02:04,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 316 transitions, 4750 flow [2024-06-14 14:02:04,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 316 transitions, 4594 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-14 14:02:04,778 INFO L231 Difference]: Finished difference. Result has 153 places, 283 transitions, 3876 flow [2024-06-14 14:02:04,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3672, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3876, PETRI_PLACES=153, PETRI_TRANSITIONS=283} [2024-06-14 14:02:04,778 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 100 predicate places. [2024-06-14 14:02:04,779 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 283 transitions, 3876 flow [2024-06-14 14:02:04,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:04,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:04,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:04,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:02:04,786 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:04,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:04,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1104812243, now seen corresponding path program 3 times [2024-06-14 14:02:04,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:04,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36165020] [2024-06-14 14:02:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:04,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:04,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:04,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36165020] [2024-06-14 14:02:04,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36165020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:04,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:04,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:02:04,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312114122] [2024-06-14 14:02:04,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:04,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:02:04,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:02:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:02:04,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:02:05,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 283 transitions, 3876 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:05,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:05,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:02:05,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:06,087 INFO L124 PetriNetUnfolderBase]: 6145/9171 cut-off events. [2024-06-14 14:02:06,087 INFO L125 PetriNetUnfolderBase]: For 231671/231697 co-relation queries the response was YES. [2024-06-14 14:02:06,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64334 conditions, 9171 events. 6145/9171 cut-off events. For 231671/231697 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 54379 event pairs, 1461 based on Foata normal form. 29/9183 useless extension candidates. Maximal degree in co-relation 64259. Up to 7743 conditions per place. [2024-06-14 14:02:06,190 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 248 selfloop transitions, 55 changer transitions 0/323 dead transitions. [2024-06-14 14:02:06,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 323 transitions, 4642 flow [2024-06-14 14:02:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-14 14:02:06,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-14 14:02:06,191 INFO L175 Difference]: Start difference. First operand has 153 places, 283 transitions, 3876 flow. Second operand 6 states and 192 transitions. [2024-06-14 14:02:06,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 323 transitions, 4642 flow [2024-06-14 14:02:06,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 323 transitions, 4484 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:06,596 INFO L231 Difference]: Finished difference. Result has 155 places, 285 transitions, 3896 flow [2024-06-14 14:02:06,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3718, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3896, PETRI_PLACES=155, PETRI_TRANSITIONS=285} [2024-06-14 14:02:06,596 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 102 predicate places. [2024-06-14 14:02:06,596 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 285 transitions, 3896 flow [2024-06-14 14:02:06,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:06,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:06,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:06,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:02:06,597 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:06,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1133659953, now seen corresponding path program 1 times [2024-06-14 14:02:06,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:06,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993323372] [2024-06-14 14:02:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:06,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:06,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993323372] [2024-06-14 14:02:06,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993323372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:06,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:06,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54454692] [2024-06-14 14:02:06,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:06,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:06,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:06,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 285 transitions, 3896 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:06,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:06,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:06,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:07,944 INFO L124 PetriNetUnfolderBase]: 6303/9332 cut-off events. [2024-06-14 14:02:07,945 INFO L125 PetriNetUnfolderBase]: For 238609/238633 co-relation queries the response was YES. [2024-06-14 14:02:07,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65774 conditions, 9332 events. 6303/9332 cut-off events. For 238609/238633 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 54688 event pairs, 1801 based on Foata normal form. 22/9343 useless extension candidates. Maximal degree in co-relation 65698. Up to 8365 conditions per place. [2024-06-14 14:02:08,038 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 245 selfloop transitions, 62 changer transitions 0/315 dead transitions. [2024-06-14 14:02:08,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 315 transitions, 4684 flow [2024-06-14 14:02:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 14:02:08,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-14 14:02:08,039 INFO L175 Difference]: Start difference. First operand has 155 places, 285 transitions, 3896 flow. Second operand 6 states and 181 transitions. [2024-06-14 14:02:08,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 315 transitions, 4684 flow [2024-06-14 14:02:08,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 315 transitions, 4550 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:08,471 INFO L231 Difference]: Finished difference. Result has 157 places, 285 transitions, 3895 flow [2024-06-14 14:02:08,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3762, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3895, PETRI_PLACES=157, PETRI_TRANSITIONS=285} [2024-06-14 14:02:08,472 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 104 predicate places. [2024-06-14 14:02:08,472 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 285 transitions, 3895 flow [2024-06-14 14:02:08,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:08,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:08,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:08,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:02:08,472 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:08,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:08,473 INFO L85 PathProgramCache]: Analyzing trace with hash -321754417, now seen corresponding path program 1 times [2024-06-14 14:02:08,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:08,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881541468] [2024-06-14 14:02:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:08,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:08,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:08,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881541468] [2024-06-14 14:02:08,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881541468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:08,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:08,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:08,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292158883] [2024-06-14 14:02:08,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:08,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:08,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:08,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:08,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:08,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:08,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 285 transitions, 3895 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:08,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:08,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:08,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:09,883 INFO L124 PetriNetUnfolderBase]: 6570/9743 cut-off events. [2024-06-14 14:02:09,883 INFO L125 PetriNetUnfolderBase]: For 268165/268189 co-relation queries the response was YES. [2024-06-14 14:02:09,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68985 conditions, 9743 events. 6570/9743 cut-off events. For 268165/268189 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 57697 event pairs, 1493 based on Foata normal form. 40/9772 useless extension candidates. Maximal degree in co-relation 68908. Up to 8192 conditions per place. [2024-06-14 14:02:09,998 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 257 selfloop transitions, 69 changer transitions 0/334 dead transitions. [2024-06-14 14:02:09,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 334 transitions, 5039 flow [2024-06-14 14:02:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-14 14:02:10,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-14 14:02:10,000 INFO L175 Difference]: Start difference. First operand has 157 places, 285 transitions, 3895 flow. Second operand 6 states and 192 transitions. [2024-06-14 14:02:10,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 334 transitions, 5039 flow [2024-06-14 14:02:10,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 334 transitions, 4873 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:10,465 INFO L231 Difference]: Finished difference. Result has 158 places, 291 transitions, 4029 flow [2024-06-14 14:02:10,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3729, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4029, PETRI_PLACES=158, PETRI_TRANSITIONS=291} [2024-06-14 14:02:10,467 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 105 predicate places. [2024-06-14 14:02:10,467 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 291 transitions, 4029 flow [2024-06-14 14:02:10,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:10,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:10,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:10,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:02:10,468 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:10,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:10,468 INFO L85 PathProgramCache]: Analyzing trace with hash -314135857, now seen corresponding path program 2 times [2024-06-14 14:02:10,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:10,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764682687] [2024-06-14 14:02:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:10,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:10,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:10,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764682687] [2024-06-14 14:02:10,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764682687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:10,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:10,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:10,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445590177] [2024-06-14 14:02:10,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:10,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:10,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:10,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:10,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:10,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:10,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 291 transitions, 4029 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:10,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:10,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:10,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:12,030 INFO L124 PetriNetUnfolderBase]: 6695/9918 cut-off events. [2024-06-14 14:02:12,031 INFO L125 PetriNetUnfolderBase]: For 293674/293698 co-relation queries the response was YES. [2024-06-14 14:02:12,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71874 conditions, 9918 events. 6695/9918 cut-off events. For 293674/293698 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 58778 event pairs, 1861 based on Foata normal form. 40/9947 useless extension candidates. Maximal degree in co-relation 71796. Up to 8803 conditions per place. [2024-06-14 14:02:12,126 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 255 selfloop transitions, 65 changer transitions 0/328 dead transitions. [2024-06-14 14:02:12,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 328 transitions, 4957 flow [2024-06-14 14:02:12,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-14 14:02:12,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-14 14:02:12,128 INFO L175 Difference]: Start difference. First operand has 158 places, 291 transitions, 4029 flow. Second operand 6 states and 184 transitions. [2024-06-14 14:02:12,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 328 transitions, 4957 flow [2024-06-14 14:02:12,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 328 transitions, 4785 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-14 14:02:12,729 INFO L231 Difference]: Finished difference. Result has 162 places, 294 transitions, 4082 flow [2024-06-14 14:02:12,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3879, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4082, PETRI_PLACES=162, PETRI_TRANSITIONS=294} [2024-06-14 14:02:12,730 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 109 predicate places. [2024-06-14 14:02:12,730 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 294 transitions, 4082 flow [2024-06-14 14:02:12,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:12,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:12,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:12,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:02:12,731 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:12,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:12,731 INFO L85 PathProgramCache]: Analyzing trace with hash -64238874, now seen corresponding path program 1 times [2024-06-14 14:02:12,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:12,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687274297] [2024-06-14 14:02:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:12,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:12,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:12,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687274297] [2024-06-14 14:02:12,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687274297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:12,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:12,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:12,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037066871] [2024-06-14 14:02:12,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:12,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:12,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:12,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:12,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:12,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:12,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 294 transitions, 4082 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:12,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:12,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:12,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:14,197 INFO L124 PetriNetUnfolderBase]: 6746/10014 cut-off events. [2024-06-14 14:02:14,197 INFO L125 PetriNetUnfolderBase]: For 291302/291312 co-relation queries the response was YES. [2024-06-14 14:02:14,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71975 conditions, 10014 events. 6746/10014 cut-off events. For 291302/291312 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59277 event pairs, 1815 based on Foata normal form. 11/10014 useless extension candidates. Maximal degree in co-relation 71895. Up to 8402 conditions per place. [2024-06-14 14:02:14,309 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 174 selfloop transitions, 174 changer transitions 0/356 dead transitions. [2024-06-14 14:02:14,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 356 transitions, 5678 flow [2024-06-14 14:02:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-06-14 14:02:14,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022222222222222 [2024-06-14 14:02:14,310 INFO L175 Difference]: Start difference. First operand has 162 places, 294 transitions, 4082 flow. Second operand 9 states and 271 transitions. [2024-06-14 14:02:14,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 356 transitions, 5678 flow [2024-06-14 14:02:14,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 356 transitions, 5517 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:14,894 INFO L231 Difference]: Finished difference. Result has 169 places, 307 transitions, 4588 flow [2024-06-14 14:02:14,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3921, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4588, PETRI_PLACES=169, PETRI_TRANSITIONS=307} [2024-06-14 14:02:14,895 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 116 predicate places. [2024-06-14 14:02:14,895 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 307 transitions, 4588 flow [2024-06-14 14:02:14,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:14,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:14,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:14,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:02:14,896 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:14,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:14,896 INFO L85 PathProgramCache]: Analyzing trace with hash -488290835, now seen corresponding path program 2 times [2024-06-14 14:02:14,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:14,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139471277] [2024-06-14 14:02:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:14,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:15,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:15,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139471277] [2024-06-14 14:02:15,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139471277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:15,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:15,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:15,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611409773] [2024-06-14 14:02:15,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:15,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:15,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:15,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:15,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:15,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:15,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 307 transitions, 4588 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:15,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:15,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:15,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:16,399 INFO L124 PetriNetUnfolderBase]: 6739/9995 cut-off events. [2024-06-14 14:02:16,399 INFO L125 PetriNetUnfolderBase]: For 312276/312286 co-relation queries the response was YES. [2024-06-14 14:02:16,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73824 conditions, 9995 events. 6739/9995 cut-off events. For 312276/312286 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 59334 event pairs, 1829 based on Foata normal form. 7/9991 useless extension candidates. Maximal degree in co-relation 73741. Up to 8972 conditions per place. [2024-06-14 14:02:16,504 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 259 selfloop transitions, 65 changer transitions 0/332 dead transitions. [2024-06-14 14:02:16,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 332 transitions, 5300 flow [2024-06-14 14:02:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-14 14:02:16,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-06-14 14:02:16,506 INFO L175 Difference]: Start difference. First operand has 169 places, 307 transitions, 4588 flow. Second operand 6 states and 178 transitions. [2024-06-14 14:02:16,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 332 transitions, 5300 flow [2024-06-14 14:02:17,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 332 transitions, 4782 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:17,052 INFO L231 Difference]: Finished difference. Result has 169 places, 307 transitions, 4209 flow [2024-06-14 14:02:17,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4209, PETRI_PLACES=169, PETRI_TRANSITIONS=307} [2024-06-14 14:02:17,053 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 116 predicate places. [2024-06-14 14:02:17,053 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 307 transitions, 4209 flow [2024-06-14 14:02:17,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:17,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:17,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:17,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:02:17,054 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:17,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:17,054 INFO L85 PathProgramCache]: Analyzing trace with hash -224931610, now seen corresponding path program 2 times [2024-06-14 14:02:17,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:17,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754525084] [2024-06-14 14:02:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:17,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:17,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:17,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754525084] [2024-06-14 14:02:17,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754525084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:17,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:17,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:17,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954214036] [2024-06-14 14:02:17,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:17,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:17,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:17,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:17,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:17,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:17,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 307 transitions, 4209 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:17,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:17,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:17,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:18,512 INFO L124 PetriNetUnfolderBase]: 6791/10106 cut-off events. [2024-06-14 14:02:18,512 INFO L125 PetriNetUnfolderBase]: For 317685/317705 co-relation queries the response was YES. [2024-06-14 14:02:18,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73518 conditions, 10106 events. 6791/10106 cut-off events. For 317685/317705 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 60031 event pairs, 1783 based on Foata normal form. 22/10123 useless extension candidates. Maximal degree in co-relation 73434. Up to 8847 conditions per place. [2024-06-14 14:02:18,631 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 251 selfloop transitions, 98 changer transitions 0/357 dead transitions. [2024-06-14 14:02:18,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 357 transitions, 5440 flow [2024-06-14 14:02:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-14 14:02:18,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314285714285715 [2024-06-14 14:02:18,633 INFO L175 Difference]: Start difference. First operand has 169 places, 307 transitions, 4209 flow. Second operand 7 states and 221 transitions. [2024-06-14 14:02:18,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 357 transitions, 5440 flow [2024-06-14 14:02:19,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 357 transitions, 5212 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:19,267 INFO L231 Difference]: Finished difference. Result has 170 places, 313 transitions, 4328 flow [2024-06-14 14:02:19,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4003, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4328, PETRI_PLACES=170, PETRI_TRANSITIONS=313} [2024-06-14 14:02:19,267 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 117 predicate places. [2024-06-14 14:02:19,267 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 313 transitions, 4328 flow [2024-06-14 14:02:19,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:19,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:19,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:19,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:02:19,268 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:19,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash -224724220, now seen corresponding path program 3 times [2024-06-14 14:02:19,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:19,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915934329] [2024-06-14 14:02:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:19,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:19,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:19,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915934329] [2024-06-14 14:02:19,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915934329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:19,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:19,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:19,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993800337] [2024-06-14 14:02:19,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:19,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:19,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:19,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:19,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:19,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:19,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 313 transitions, 4328 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:19,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:19,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:19,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:20,805 INFO L124 PetriNetUnfolderBase]: 6770/10075 cut-off events. [2024-06-14 14:02:20,805 INFO L125 PetriNetUnfolderBase]: For 313773/313793 co-relation queries the response was YES. [2024-06-14 14:02:20,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73112 conditions, 10075 events. 6770/10075 cut-off events. For 313773/313793 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 59916 event pairs, 1781 based on Foata normal form. 22/10092 useless extension candidates. Maximal degree in co-relation 73028. Up to 8831 conditions per place. [2024-06-14 14:02:20,901 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 244 selfloop transitions, 101 changer transitions 0/353 dead transitions. [2024-06-14 14:02:20,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 353 transitions, 5301 flow [2024-06-14 14:02:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-14 14:02:20,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975 [2024-06-14 14:02:20,902 INFO L175 Difference]: Start difference. First operand has 170 places, 313 transitions, 4328 flow. Second operand 8 states and 239 transitions. [2024-06-14 14:02:20,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 353 transitions, 5301 flow [2024-06-14 14:02:21,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 353 transitions, 5041 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:21,475 INFO L231 Difference]: Finished difference. Result has 172 places, 313 transitions, 4289 flow [2024-06-14 14:02:21,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4289, PETRI_PLACES=172, PETRI_TRANSITIONS=313} [2024-06-14 14:02:21,475 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 119 predicate places. [2024-06-14 14:02:21,475 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 313 transitions, 4289 flow [2024-06-14 14:02:21,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:21,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:21,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:21,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:02:21,476 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:21,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:21,476 INFO L85 PathProgramCache]: Analyzing trace with hash -225054897, now seen corresponding path program 3 times [2024-06-14 14:02:21,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:21,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461940243] [2024-06-14 14:02:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:21,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:21,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:21,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461940243] [2024-06-14 14:02:21,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461940243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:21,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:21,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:21,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060787867] [2024-06-14 14:02:21,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:21,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:21,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:21,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:21,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:21,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:21,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 313 transitions, 4289 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:21,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:21,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:21,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:22,929 INFO L124 PetriNetUnfolderBase]: 6856/10184 cut-off events. [2024-06-14 14:02:22,929 INFO L125 PetriNetUnfolderBase]: For 340934/340954 co-relation queries the response was YES. [2024-06-14 14:02:22,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73970 conditions, 10184 events. 6856/10184 cut-off events. For 340934/340954 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 60770 event pairs, 1430 based on Foata normal form. 36/10215 useless extension candidates. Maximal degree in co-relation 73886. Up to 8883 conditions per place. [2024-06-14 14:02:23,039 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 290 selfloop transitions, 55 changer transitions 0/353 dead transitions. [2024-06-14 14:02:23,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 353 transitions, 5137 flow [2024-06-14 14:02:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-14 14:02:23,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-14 14:02:23,040 INFO L175 Difference]: Start difference. First operand has 172 places, 313 transitions, 4289 flow. Second operand 6 states and 189 transitions. [2024-06-14 14:02:23,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 353 transitions, 5137 flow [2024-06-14 14:02:23,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 353 transitions, 4908 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:23,695 INFO L231 Difference]: Finished difference. Result has 171 places, 315 transitions, 4236 flow [2024-06-14 14:02:23,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4060, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4236, PETRI_PLACES=171, PETRI_TRANSITIONS=315} [2024-06-14 14:02:23,695 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 118 predicate places. [2024-06-14 14:02:23,695 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 315 transitions, 4236 flow [2024-06-14 14:02:23,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:23,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:23,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:23,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:02:23,696 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:23,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:23,696 INFO L85 PathProgramCache]: Analyzing trace with hash -224716284, now seen corresponding path program 1 times [2024-06-14 14:02:23,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:23,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863778604] [2024-06-14 14:02:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:23,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:23,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:23,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863778604] [2024-06-14 14:02:23,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863778604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:23,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:23,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721420406] [2024-06-14 14:02:23,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:23,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:23,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:23,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:23,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:23,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 315 transitions, 4236 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:23,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:23,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:23,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:25,289 INFO L124 PetriNetUnfolderBase]: 6945/10318 cut-off events. [2024-06-14 14:02:25,289 INFO L125 PetriNetUnfolderBase]: For 350022/350042 co-relation queries the response was YES. [2024-06-14 14:02:25,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75388 conditions, 10318 events. 6945/10318 cut-off events. For 350022/350042 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 61326 event pairs, 1787 based on Foata normal form. 28/10341 useless extension candidates. Maximal degree in co-relation 75303. Up to 9347 conditions per place. [2024-06-14 14:02:25,408 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 296 selfloop transitions, 39 changer transitions 0/343 dead transitions. [2024-06-14 14:02:25,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 343 transitions, 5140 flow [2024-06-14 14:02:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-14 14:02:25,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:02:25,410 INFO L175 Difference]: Start difference. First operand has 171 places, 315 transitions, 4236 flow. Second operand 6 states and 175 transitions. [2024-06-14 14:02:25,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 343 transitions, 5140 flow [2024-06-14 14:02:26,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 343 transitions, 5010 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:26,110 INFO L231 Difference]: Finished difference. Result has 173 places, 318 transitions, 4280 flow [2024-06-14 14:02:26,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4106, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4280, PETRI_PLACES=173, PETRI_TRANSITIONS=318} [2024-06-14 14:02:26,111 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 120 predicate places. [2024-06-14 14:02:26,111 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 318 transitions, 4280 flow [2024-06-14 14:02:26,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:26,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:26,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:26,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:02:26,112 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:26,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:26,112 INFO L85 PathProgramCache]: Analyzing trace with hash -841338104, now seen corresponding path program 1 times [2024-06-14 14:02:26,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:26,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106992408] [2024-06-14 14:02:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:26,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:26,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:26,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106992408] [2024-06-14 14:02:26,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106992408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:26,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:26,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:02:26,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198132947] [2024-06-14 14:02:26,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:26,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:02:26,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:26,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:02:26,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:02:26,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:02:26,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 318 transitions, 4280 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:26,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:26,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:02:26,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:27,458 INFO L124 PetriNetUnfolderBase]: 6600/9830 cut-off events. [2024-06-14 14:02:27,459 INFO L125 PetriNetUnfolderBase]: For 379834/379895 co-relation queries the response was YES. [2024-06-14 14:02:27,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74651 conditions, 9830 events. 6600/9830 cut-off events. For 379834/379895 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 59159 event pairs, 1640 based on Foata normal form. 13/9638 useless extension candidates. Maximal degree in co-relation 74565. Up to 8827 conditions per place. [2024-06-14 14:02:27,570 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 275 selfloop transitions, 33 changer transitions 0/333 dead transitions. [2024-06-14 14:02:27,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 333 transitions, 4934 flow [2024-06-14 14:02:27,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:02:27,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:02:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-14 14:02:27,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.588 [2024-06-14 14:02:27,572 INFO L175 Difference]: Start difference. First operand has 173 places, 318 transitions, 4280 flow. Second operand 5 states and 147 transitions. [2024-06-14 14:02:27,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 333 transitions, 4934 flow [2024-06-14 14:02:28,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 333 transitions, 4802 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:28,275 INFO L231 Difference]: Finished difference. Result has 174 places, 318 transitions, 4232 flow [2024-06-14 14:02:28,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4148, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4232, PETRI_PLACES=174, PETRI_TRANSITIONS=318} [2024-06-14 14:02:28,275 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 121 predicate places. [2024-06-14 14:02:28,275 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 318 transitions, 4232 flow [2024-06-14 14:02:28,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:28,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:28,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:28,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:02:28,276 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:28,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:28,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1722980720, now seen corresponding path program 4 times [2024-06-14 14:02:28,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:28,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856535781] [2024-06-14 14:02:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:28,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:28,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:28,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856535781] [2024-06-14 14:02:28,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856535781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:28,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:28,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:28,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543228307] [2024-06-14 14:02:28,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:28,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:28,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:28,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:28,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:28,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:28,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 318 transitions, 4232 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:28,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:28,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:28,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:29,879 INFO L124 PetriNetUnfolderBase]: 7008/10376 cut-off events. [2024-06-14 14:02:29,879 INFO L125 PetriNetUnfolderBase]: For 378678/378688 co-relation queries the response was YES. [2024-06-14 14:02:29,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76746 conditions, 10376 events. 7008/10376 cut-off events. For 378678/378688 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 61425 event pairs, 1924 based on Foata normal form. 5/10358 useless extension candidates. Maximal degree in co-relation 76659. Up to 8445 conditions per place. [2024-06-14 14:02:29,980 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 174 selfloop transitions, 213 changer transitions 0/395 dead transitions. [2024-06-14 14:02:29,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 395 transitions, 6165 flow [2024-06-14 14:02:29,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-14 14:02:29,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2024-06-14 14:02:29,982 INFO L175 Difference]: Start difference. First operand has 174 places, 318 transitions, 4232 flow. Second operand 7 states and 218 transitions. [2024-06-14 14:02:29,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 395 transitions, 6165 flow [2024-06-14 14:02:30,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 395 transitions, 6081 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:30,691 INFO L231 Difference]: Finished difference. Result has 179 places, 353 transitions, 5340 flow [2024-06-14 14:02:30,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5340, PETRI_PLACES=179, PETRI_TRANSITIONS=353} [2024-06-14 14:02:30,692 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 126 predicate places. [2024-06-14 14:02:30,692 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 353 transitions, 5340 flow [2024-06-14 14:02:30,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:30,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:30,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:30,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:02:30,693 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:30,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:30,694 INFO L85 PathProgramCache]: Analyzing trace with hash 110313992, now seen corresponding path program 5 times [2024-06-14 14:02:30,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:30,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671316869] [2024-06-14 14:02:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:30,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:30,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:30,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671316869] [2024-06-14 14:02:30,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671316869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:30,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:30,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:30,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411374588] [2024-06-14 14:02:30,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:30,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:30,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:30,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:30,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:30,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:30,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 353 transitions, 5340 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:30,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:30,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:30,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:32,280 INFO L124 PetriNetUnfolderBase]: 7000/10387 cut-off events. [2024-06-14 14:02:32,280 INFO L125 PetriNetUnfolderBase]: For 405029/405049 co-relation queries the response was YES. [2024-06-14 14:02:32,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82098 conditions, 10387 events. 7000/10387 cut-off events. For 405029/405049 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 61838 event pairs, 1790 based on Foata normal form. 19/10401 useless extension candidates. Maximal degree in co-relation 82008. Up to 9378 conditions per place. [2024-06-14 14:02:32,400 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 327 selfloop transitions, 63 changer transitions 0/398 dead transitions. [2024-06-14 14:02:32,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 398 transitions, 6382 flow [2024-06-14 14:02:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-14 14:02:32,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-14 14:02:32,401 INFO L175 Difference]: Start difference. First operand has 179 places, 353 transitions, 5340 flow. Second operand 8 states and 235 transitions. [2024-06-14 14:02:32,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 398 transitions, 6382 flow [2024-06-14 14:02:33,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 398 transitions, 6194 flow, removed 94 selfloop flow, removed 0 redundant places. [2024-06-14 14:02:33,424 INFO L231 Difference]: Finished difference. Result has 188 places, 358 transitions, 5394 flow [2024-06-14 14:02:33,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5152, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5394, PETRI_PLACES=188, PETRI_TRANSITIONS=358} [2024-06-14 14:02:33,425 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 135 predicate places. [2024-06-14 14:02:33,425 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 358 transitions, 5394 flow [2024-06-14 14:02:33,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:33,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:33,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:33,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:02:33,425 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:33,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:33,426 INFO L85 PathProgramCache]: Analyzing trace with hash 310001732, now seen corresponding path program 6 times [2024-06-14 14:02:33,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:33,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834357545] [2024-06-14 14:02:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:33,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:33,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:33,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834357545] [2024-06-14 14:02:33,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834357545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:33,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:33,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:33,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141638460] [2024-06-14 14:02:33,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:33,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:33,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:33,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:33,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:33,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:33,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 358 transitions, 5394 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:33,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:33,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:33,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:35,266 INFO L124 PetriNetUnfolderBase]: 7079/10513 cut-off events. [2024-06-14 14:02:35,267 INFO L125 PetriNetUnfolderBase]: For 408458/408478 co-relation queries the response was YES. [2024-06-14 14:02:35,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82290 conditions, 10513 events. 7079/10513 cut-off events. For 408458/408478 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 62533 event pairs, 1782 based on Foata normal form. 19/10521 useless extension candidates. Maximal degree in co-relation 82196. Up to 8881 conditions per place. [2024-06-14 14:02:35,376 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 231 selfloop transitions, 181 changer transitions 0/420 dead transitions. [2024-06-14 14:02:35,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 420 transitions, 7096 flow [2024-06-14 14:02:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 247 transitions. [2024-06-14 14:02:35,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175 [2024-06-14 14:02:35,378 INFO L175 Difference]: Start difference. First operand has 188 places, 358 transitions, 5394 flow. Second operand 8 states and 247 transitions. [2024-06-14 14:02:35,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 420 transitions, 7096 flow [2024-06-14 14:02:36,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 420 transitions, 6829 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:36,243 INFO L231 Difference]: Finished difference. Result has 193 places, 374 transitions, 5823 flow [2024-06-14 14:02:36,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5823, PETRI_PLACES=193, PETRI_TRANSITIONS=374} [2024-06-14 14:02:36,244 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 140 predicate places. [2024-06-14 14:02:36,244 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 374 transitions, 5823 flow [2024-06-14 14:02:36,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:36,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:36,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:36,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:02:36,244 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:36,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:36,245 INFO L85 PathProgramCache]: Analyzing trace with hash -792145640, now seen corresponding path program 7 times [2024-06-14 14:02:36,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:36,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106448560] [2024-06-14 14:02:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:36,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:36,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:36,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106448560] [2024-06-14 14:02:36,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106448560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:36,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:36,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:36,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821990370] [2024-06-14 14:02:36,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:36,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:36,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:36,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 374 transitions, 5823 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:36,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:36,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:36,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:38,087 INFO L124 PetriNetUnfolderBase]: 7057/10485 cut-off events. [2024-06-14 14:02:38,087 INFO L125 PetriNetUnfolderBase]: For 427865/427885 co-relation queries the response was YES. [2024-06-14 14:02:38,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83300 conditions, 10485 events. 7057/10485 cut-off events. For 427865/427885 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 62453 event pairs, 1782 based on Foata normal form. 22/10496 useless extension candidates. Maximal degree in co-relation 83204. Up to 8864 conditions per place. [2024-06-14 14:02:38,216 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 239 selfloop transitions, 177 changer transitions 0/424 dead transitions. [2024-06-14 14:02:38,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 424 transitions, 7339 flow [2024-06-14 14:02:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2024-06-14 14:02:38,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2024-06-14 14:02:38,224 INFO L175 Difference]: Start difference. First operand has 193 places, 374 transitions, 5823 flow. Second operand 9 states and 273 transitions. [2024-06-14 14:02:38,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 424 transitions, 7339 flow [2024-06-14 14:02:39,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 424 transitions, 7031 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:39,151 INFO L231 Difference]: Finished difference. Result has 198 places, 374 transitions, 5881 flow [2024-06-14 14:02:39,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5515, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5881, PETRI_PLACES=198, PETRI_TRANSITIONS=374} [2024-06-14 14:02:39,151 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 145 predicate places. [2024-06-14 14:02:39,151 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 374 transitions, 5881 flow [2024-06-14 14:02:39,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:39,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:39,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:39,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:02:39,152 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:39,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash 110699942, now seen corresponding path program 8 times [2024-06-14 14:02:39,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:39,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598389939] [2024-06-14 14:02:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:39,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:39,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598389939] [2024-06-14 14:02:39,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598389939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:39,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:39,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:39,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072557261] [2024-06-14 14:02:39,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:39,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:39,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:39,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:39,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:39,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:39,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 374 transitions, 5881 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:39,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:39,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:39,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:40,989 INFO L124 PetriNetUnfolderBase]: 7044/10468 cut-off events. [2024-06-14 14:02:40,989 INFO L125 PetriNetUnfolderBase]: For 442373/442393 co-relation queries the response was YES. [2024-06-14 14:02:41,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83689 conditions, 10468 events. 7044/10468 cut-off events. For 442373/442393 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 62298 event pairs, 1800 based on Foata normal form. 16/10474 useless extension candidates. Maximal degree in co-relation 83592. Up to 8854 conditions per place. [2024-06-14 14:02:41,102 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 233 selfloop transitions, 177 changer transitions 0/418 dead transitions. [2024-06-14 14:02:41,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 418 transitions, 7256 flow [2024-06-14 14:02:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:41,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-14 14:02:41,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314285714285715 [2024-06-14 14:02:41,112 INFO L175 Difference]: Start difference. First operand has 198 places, 374 transitions, 5881 flow. Second operand 7 states and 221 transitions. [2024-06-14 14:02:41,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 418 transitions, 7256 flow [2024-06-14 14:02:42,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 418 transitions, 6878 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:42,072 INFO L231 Difference]: Finished difference. Result has 201 places, 377 transitions, 6105 flow [2024-06-14 14:02:42,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5505, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6105, PETRI_PLACES=201, PETRI_TRANSITIONS=377} [2024-06-14 14:02:42,073 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 148 predicate places. [2024-06-14 14:02:42,073 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 377 transitions, 6105 flow [2024-06-14 14:02:42,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:42,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:42,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:42,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:02:42,074 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:42,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:42,074 INFO L85 PathProgramCache]: Analyzing trace with hash 304295748, now seen corresponding path program 2 times [2024-06-14 14:02:42,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:42,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190834621] [2024-06-14 14:02:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:42,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:42,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:42,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190834621] [2024-06-14 14:02:42,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190834621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:42,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:42,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:42,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311988636] [2024-06-14 14:02:42,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:42,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:42,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:42,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:42,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:42,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:42,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 377 transitions, 6105 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:42,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:42,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:42,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:43,906 INFO L124 PetriNetUnfolderBase]: 7115/10564 cut-off events. [2024-06-14 14:02:43,907 INFO L125 PetriNetUnfolderBase]: For 473037/473057 co-relation queries the response was YES. [2024-06-14 14:02:43,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86014 conditions, 10564 events. 7115/10564 cut-off events. For 473037/473057 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 62842 event pairs, 1803 based on Foata normal form. 28/10581 useless extension candidates. Maximal degree in co-relation 85914. Up to 9601 conditions per place. [2024-06-14 14:02:44,037 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 356 selfloop transitions, 45 changer transitions 0/409 dead transitions. [2024-06-14 14:02:44,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 409 transitions, 7249 flow [2024-06-14 14:02:44,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:44,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:44,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-14 14:02:44,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-06-14 14:02:44,040 INFO L175 Difference]: Start difference. First operand has 201 places, 377 transitions, 6105 flow. Second operand 6 states and 178 transitions. [2024-06-14 14:02:44,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 409 transitions, 7249 flow [2024-06-14 14:02:45,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 409 transitions, 7010 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:45,100 INFO L231 Difference]: Finished difference. Result has 203 places, 380 transitions, 6053 flow [2024-06-14 14:02:45,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6053, PETRI_PLACES=203, PETRI_TRANSITIONS=380} [2024-06-14 14:02:45,106 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 150 predicate places. [2024-06-14 14:02:45,106 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 380 transitions, 6053 flow [2024-06-14 14:02:45,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:45,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:45,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:45,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 14:02:45,107 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:45,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:45,107 INFO L85 PathProgramCache]: Analyzing trace with hash 317628228, now seen corresponding path program 3 times [2024-06-14 14:02:45,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:45,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870997313] [2024-06-14 14:02:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:45,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:45,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870997313] [2024-06-14 14:02:45,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870997313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:45,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:45,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:45,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447915655] [2024-06-14 14:02:45,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:45,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:45,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:45,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:45,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:45,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:45,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 380 transitions, 6053 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:45,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:45,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:45,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:47,109 INFO L124 PetriNetUnfolderBase]: 7217/10702 cut-off events. [2024-06-14 14:02:47,109 INFO L125 PetriNetUnfolderBase]: For 501492/501512 co-relation queries the response was YES. [2024-06-14 14:02:47,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87564 conditions, 10702 events. 7217/10702 cut-off events. For 501492/501512 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 63699 event pairs, 1784 based on Foata normal form. 28/10719 useless extension candidates. Maximal degree in co-relation 87463. Up to 9520 conditions per place. [2024-06-14 14:02:47,230 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 356 selfloop transitions, 55 changer transitions 0/419 dead transitions. [2024-06-14 14:02:47,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 419 transitions, 7383 flow [2024-06-14 14:02:47,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-14 14:02:47,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2024-06-14 14:02:47,235 INFO L175 Difference]: Start difference. First operand has 203 places, 380 transitions, 6053 flow. Second operand 6 states and 182 transitions. [2024-06-14 14:02:47,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 419 transitions, 7383 flow [2024-06-14 14:02:48,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 419 transitions, 7138 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:48,303 INFO L231 Difference]: Finished difference. Result has 205 places, 385 transitions, 6064 flow [2024-06-14 14:02:48,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5808, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6064, PETRI_PLACES=205, PETRI_TRANSITIONS=385} [2024-06-14 14:02:48,304 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 152 predicate places. [2024-06-14 14:02:48,305 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 385 transitions, 6064 flow [2024-06-14 14:02:48,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:48,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:48,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:48,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 14:02:48,305 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:48,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash 483164716, now seen corresponding path program 2 times [2024-06-14 14:02:48,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:48,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195033370] [2024-06-14 14:02:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:48,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:48,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:48,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195033370] [2024-06-14 14:02:48,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195033370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:48,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:48,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:02:48,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516915435] [2024-06-14 14:02:48,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:48,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:02:48,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:48,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:02:48,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:02:48,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:02:48,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 385 transitions, 6064 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:48,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:48,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:02:48,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:49,914 INFO L124 PetriNetUnfolderBase]: 6909/10263 cut-off events. [2024-06-14 14:02:49,915 INFO L125 PetriNetUnfolderBase]: For 544631/544692 co-relation queries the response was YES. [2024-06-14 14:02:49,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86865 conditions, 10263 events. 6909/10263 cut-off events. For 544631/544692 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 61751 event pairs, 1686 based on Foata normal form. 13/10066 useless extension candidates. Maximal degree in co-relation 86763. Up to 9206 conditions per place. [2024-06-14 14:02:50,050 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 329 selfloop transitions, 48 changer transitions 0/403 dead transitions. [2024-06-14 14:02:50,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 403 transitions, 7091 flow [2024-06-14 14:02:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:02:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:02:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-14 14:02:50,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.588 [2024-06-14 14:02:50,055 INFO L175 Difference]: Start difference. First operand has 205 places, 385 transitions, 6064 flow. Second operand 5 states and 147 transitions. [2024-06-14 14:02:50,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 403 transitions, 7091 flow [2024-06-14 14:02:51,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 403 transitions, 6960 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-14 14:02:51,152 INFO L231 Difference]: Finished difference. Result has 208 places, 389 transitions, 6116 flow [2024-06-14 14:02:51,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5937, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6116, PETRI_PLACES=208, PETRI_TRANSITIONS=389} [2024-06-14 14:02:51,153 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 155 predicate places. [2024-06-14 14:02:51,153 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 389 transitions, 6116 flow [2024-06-14 14:02:51,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:51,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:51,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:51,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 14:02:51,154 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:51,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash -644306414, now seen corresponding path program 1 times [2024-06-14 14:02:51,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:51,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160792309] [2024-06-14 14:02:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:51,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:51,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:51,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160792309] [2024-06-14 14:02:51,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160792309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:51,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:51,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:51,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552013728] [2024-06-14 14:02:51,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:51,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:51,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:51,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:51,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:51,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:51,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 389 transitions, 6116 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:51,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:51,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:51,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:53,296 INFO L124 PetriNetUnfolderBase]: 8045/11913 cut-off events. [2024-06-14 14:02:53,297 INFO L125 PetriNetUnfolderBase]: For 624017/624021 co-relation queries the response was YES. [2024-06-14 14:02:53,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96680 conditions, 11913 events. 8045/11913 cut-off events. For 624017/624021 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 72129 event pairs, 1969 based on Foata normal form. 37/11944 useless extension candidates. Maximal degree in co-relation 96576. Up to 9787 conditions per place. [2024-06-14 14:02:53,466 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 411 selfloop transitions, 45 changer transitions 0/464 dead transitions. [2024-06-14 14:02:53,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 464 transitions, 7912 flow [2024-06-14 14:02:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-14 14:02:53,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314285714285715 [2024-06-14 14:02:53,475 INFO L175 Difference]: Start difference. First operand has 208 places, 389 transitions, 6116 flow. Second operand 7 states and 221 transitions. [2024-06-14 14:02:53,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 464 transitions, 7912 flow [2024-06-14 14:02:54,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 464 transitions, 7731 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:54,833 INFO L231 Difference]: Finished difference. Result has 212 places, 397 transitions, 6197 flow [2024-06-14 14:02:54,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5935, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6197, PETRI_PLACES=212, PETRI_TRANSITIONS=397} [2024-06-14 14:02:54,835 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 159 predicate places. [2024-06-14 14:02:54,836 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 397 transitions, 6197 flow [2024-06-14 14:02:54,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:54,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:54,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:54,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 14:02:54,836 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:54,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:54,837 INFO L85 PathProgramCache]: Analyzing trace with hash -642428744, now seen corresponding path program 2 times [2024-06-14 14:02:54,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:54,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125847238] [2024-06-14 14:02:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:54,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:55,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:55,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125847238] [2024-06-14 14:02:55,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125847238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:55,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:55,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:55,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373641309] [2024-06-14 14:02:55,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:55,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:55,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:55,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:55,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:55,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:55,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 397 transitions, 6197 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:55,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:55,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:55,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:57,010 INFO L124 PetriNetUnfolderBase]: 8322/12314 cut-off events. [2024-06-14 14:02:57,010 INFO L125 PetriNetUnfolderBase]: For 670593/670597 co-relation queries the response was YES. [2024-06-14 14:02:57,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101379 conditions, 12314 events. 8322/12314 cut-off events. For 670593/670597 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 74899 event pairs, 2189 based on Foata normal form. 43/12349 useless extension candidates. Maximal degree in co-relation 101275. Up to 11052 conditions per place. [2024-06-14 14:02:57,175 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 389 selfloop transitions, 44 changer transitions 0/441 dead transitions. [2024-06-14 14:02:57,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 441 transitions, 7481 flow [2024-06-14 14:02:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-14 14:02:57,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2024-06-14 14:02:57,177 INFO L175 Difference]: Start difference. First operand has 212 places, 397 transitions, 6197 flow. Second operand 7 states and 208 transitions. [2024-06-14 14:02:57,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 441 transitions, 7481 flow [2024-06-14 14:02:58,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 441 transitions, 7341 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 14:02:58,642 INFO L231 Difference]: Finished difference. Result has 216 places, 399 transitions, 6217 flow [2024-06-14 14:02:58,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6057, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6217, PETRI_PLACES=216, PETRI_TRANSITIONS=399} [2024-06-14 14:02:58,643 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 163 predicate places. [2024-06-14 14:02:58,643 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 399 transitions, 6217 flow [2024-06-14 14:02:58,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:58,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:58,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:58,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 14:02:58,644 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:02:58,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:58,644 INFO L85 PathProgramCache]: Analyzing trace with hash -555740654, now seen corresponding path program 3 times [2024-06-14 14:02:58,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:58,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757192858] [2024-06-14 14:02:58,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:58,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:58,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:58,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757192858] [2024-06-14 14:02:58,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757192858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:58,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:58,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:58,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991098525] [2024-06-14 14:02:58,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:58,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:58,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:58,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:58,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:58,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:02:58,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 399 transitions, 6217 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:58,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:58,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:02:58,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:00,907 INFO L124 PetriNetUnfolderBase]: 8830/13090 cut-off events. [2024-06-14 14:03:00,907 INFO L125 PetriNetUnfolderBase]: For 724679/724683 co-relation queries the response was YES. [2024-06-14 14:03:01,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107780 conditions, 13090 events. 8830/13090 cut-off events. For 724679/724683 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 80649 event pairs, 2295 based on Foata normal form. 37/13121 useless extension candidates. Maximal degree in co-relation 107675. Up to 11193 conditions per place. [2024-06-14 14:03:01,093 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 401 selfloop transitions, 45 changer transitions 0/454 dead transitions. [2024-06-14 14:03:01,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 454 transitions, 7728 flow [2024-06-14 14:03:01,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:03:01,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:03:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-14 14:03:01,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085714285714285 [2024-06-14 14:03:01,094 INFO L175 Difference]: Start difference. First operand has 216 places, 399 transitions, 6217 flow. Second operand 7 states and 213 transitions. [2024-06-14 14:03:01,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 454 transitions, 7728 flow [2024-06-14 14:03:02,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 454 transitions, 7603 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 14:03:02,723 INFO L231 Difference]: Finished difference. Result has 219 places, 404 transitions, 6316 flow [2024-06-14 14:03:02,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6316, PETRI_PLACES=219, PETRI_TRANSITIONS=404} [2024-06-14 14:03:02,723 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 166 predicate places. [2024-06-14 14:03:02,724 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 404 transitions, 6316 flow [2024-06-14 14:03:02,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:02,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:02,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:02,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 14:03:02,726 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:03:02,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:02,727 INFO L85 PathProgramCache]: Analyzing trace with hash 105681098, now seen corresponding path program 1 times [2024-06-14 14:03:02,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:02,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708938339] [2024-06-14 14:03:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:02,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:02,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:02,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708938339] [2024-06-14 14:03:02,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708938339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:02,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:02,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:03:02,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428446893] [2024-06-14 14:03:02,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:02,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:03:02,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:02,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:03:02,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:03:02,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:03:02,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 404 transitions, 6316 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:02,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:02,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:03:02,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:05,446 INFO L124 PetriNetUnfolderBase]: 8837/13102 cut-off events. [2024-06-14 14:03:05,446 INFO L125 PetriNetUnfolderBase]: For 725999/725999 co-relation queries the response was YES. [2024-06-14 14:03:05,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109439 conditions, 13102 events. 8837/13102 cut-off events. For 725999/725999 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 80816 event pairs, 2396 based on Foata normal form. 1/13099 useless extension candidates. Maximal degree in co-relation 109332. Up to 12162 conditions per place. [2024-06-14 14:03:05,830 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 410 selfloop transitions, 20 changer transitions 0/438 dead transitions. [2024-06-14 14:03:05,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 438 transitions, 7629 flow [2024-06-14 14:03:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:03:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:03:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-14 14:03:05,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576 [2024-06-14 14:03:05,832 INFO L175 Difference]: Start difference. First operand has 219 places, 404 transitions, 6316 flow. Second operand 5 states and 144 transitions. [2024-06-14 14:03:05,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 438 transitions, 7629 flow [2024-06-14 14:03:07,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 438 transitions, 7510 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 14:03:07,305 INFO L231 Difference]: Finished difference. Result has 223 places, 419 transitions, 6601 flow [2024-06-14 14:03:07,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6211, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6601, PETRI_PLACES=223, PETRI_TRANSITIONS=419} [2024-06-14 14:03:07,305 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 170 predicate places. [2024-06-14 14:03:07,305 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 419 transitions, 6601 flow [2024-06-14 14:03:07,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:07,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:07,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 14:03:07,306 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:03:07,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash 202878008, now seen corresponding path program 4 times [2024-06-14 14:03:07,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:07,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334937045] [2024-06-14 14:03:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:07,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:07,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:07,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334937045] [2024-06-14 14:03:07,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334937045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:07,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:07,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:03:07,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181449851] [2024-06-14 14:03:07,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:07,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:03:07,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:07,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:03:07,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:03:07,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:03:07,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 419 transitions, 6601 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:07,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:07,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:03:07,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:10,058 INFO L124 PetriNetUnfolderBase]: 9114/13486 cut-off events. [2024-06-14 14:03:10,058 INFO L125 PetriNetUnfolderBase]: For 796748/796752 co-relation queries the response was YES. [2024-06-14 14:03:10,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112252 conditions, 13486 events. 9114/13486 cut-off events. For 796748/796752 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 83366 event pairs, 2440 based on Foata normal form. 43/13521 useless extension candidates. Maximal degree in co-relation 112141. Up to 12200 conditions per place. [2024-06-14 14:03:10,376 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 400 selfloop transitions, 46 changer transitions 0/454 dead transitions. [2024-06-14 14:03:10,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 454 transitions, 7778 flow [2024-06-14 14:03:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:03:10,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:03:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 14:03:10,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-14 14:03:10,377 INFO L175 Difference]: Start difference. First operand has 223 places, 419 transitions, 6601 flow. Second operand 6 states and 181 transitions. [2024-06-14 14:03:10,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 454 transitions, 7778 flow [2024-06-14 14:03:12,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 454 transitions, 7752 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-14 14:03:12,016 INFO L231 Difference]: Finished difference. Result has 229 places, 421 transitions, 6747 flow [2024-06-14 14:03:12,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6575, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6747, PETRI_PLACES=229, PETRI_TRANSITIONS=421} [2024-06-14 14:03:12,017 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 176 predicate places. [2024-06-14 14:03:12,017 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 421 transitions, 6747 flow [2024-06-14 14:03:12,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:12,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:12,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:12,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 14:03:12,018 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:03:12,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash 110560008, now seen corresponding path program 5 times [2024-06-14 14:03:12,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:12,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91784195] [2024-06-14 14:03:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:12,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:12,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:12,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91784195] [2024-06-14 14:03:12,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91784195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:12,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:12,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:03:12,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438052511] [2024-06-14 14:03:12,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:12,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:03:12,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:12,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:03:12,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:03:12,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:03:12,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 421 transitions, 6747 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:12,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:12,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:03:12,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:14,868 INFO L124 PetriNetUnfolderBase]: 9347/13849 cut-off events. [2024-06-14 14:03:14,868 INFO L125 PetriNetUnfolderBase]: For 827220/827224 co-relation queries the response was YES. [2024-06-14 14:03:15,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115989 conditions, 13849 events. 9347/13849 cut-off events. For 827220/827224 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 86018 event pairs, 2368 based on Foata normal form. 37/13880 useless extension candidates. Maximal degree in co-relation 115875. Up to 11716 conditions per place. [2024-06-14 14:03:15,090 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 415 selfloop transitions, 49 changer transitions 0/472 dead transitions. [2024-06-14 14:03:15,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 472 transitions, 8319 flow [2024-06-14 14:03:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:03:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:03:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-14 14:03:15,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-06-14 14:03:15,092 INFO L175 Difference]: Start difference. First operand has 229 places, 421 transitions, 6747 flow. Second operand 6 states and 191 transitions. [2024-06-14 14:03:15,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 472 transitions, 8319 flow [2024-06-14 14:03:16,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 472 transitions, 8180 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 14:03:16,915 INFO L231 Difference]: Finished difference. Result has 232 places, 425 transitions, 6845 flow [2024-06-14 14:03:16,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6608, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6845, PETRI_PLACES=232, PETRI_TRANSITIONS=425} [2024-06-14 14:03:16,915 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 179 predicate places. [2024-06-14 14:03:16,915 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 425 transitions, 6845 flow [2024-06-14 14:03:16,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:16,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:16,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:16,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 14:03:16,916 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:03:16,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:16,916 INFO L85 PathProgramCache]: Analyzing trace with hash 310009668, now seen corresponding path program 6 times [2024-06-14 14:03:16,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:16,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289942364] [2024-06-14 14:03:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:16,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:17,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:17,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289942364] [2024-06-14 14:03:17,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289942364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:17,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:17,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:03:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086667778] [2024-06-14 14:03:17,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:17,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:03:17,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:17,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:03:17,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:03:17,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:03:17,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 425 transitions, 6845 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:17,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:17,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:03:17,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:19,825 INFO L124 PetriNetUnfolderBase]: 9431/13977 cut-off events. [2024-06-14 14:03:19,826 INFO L125 PetriNetUnfolderBase]: For 855735/855739 co-relation queries the response was YES. [2024-06-14 14:03:19,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117175 conditions, 13977 events. 9431/13977 cut-off events. For 855735/855739 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 87141 event pairs, 2549 based on Foata normal form. 46/14017 useless extension candidates. Maximal degree in co-relation 117059. Up to 12709 conditions per place. [2024-06-14 14:03:20,076 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 410 selfloop transitions, 50 changer transitions 0/468 dead transitions. [2024-06-14 14:03:20,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 468 transitions, 8083 flow [2024-06-14 14:03:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-14 14:03:20,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-14 14:03:20,078 INFO L175 Difference]: Start difference. First operand has 232 places, 425 transitions, 6845 flow. Second operand 8 states and 231 transitions. [2024-06-14 14:03:20,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 468 transitions, 8083 flow [2024-06-14 14:03:22,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 468 transitions, 7866 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 14:03:22,721 INFO L231 Difference]: Finished difference. Result has 235 places, 427 transitions, 6817 flow [2024-06-14 14:03:22,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6632, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6817, PETRI_PLACES=235, PETRI_TRANSITIONS=427} [2024-06-14 14:03:22,721 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 182 predicate places. [2024-06-14 14:03:22,721 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 427 transitions, 6817 flow [2024-06-14 14:03:22,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:22,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:22,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:22,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 14:03:22,722 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:03:22,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:22,722 INFO L85 PathProgramCache]: Analyzing trace with hash 317634180, now seen corresponding path program 1 times [2024-06-14 14:03:22,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:22,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882791227] [2024-06-14 14:03:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:22,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:22,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882791227] [2024-06-14 14:03:22,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882791227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:22,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:22,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:03:22,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583204174] [2024-06-14 14:03:22,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:22,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:03:22,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:22,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:03:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:03:22,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:03:22,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 427 transitions, 6817 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:22,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:22,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:03:22,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:25,633 INFO L124 PetriNetUnfolderBase]: 9515/14088 cut-off events. [2024-06-14 14:03:25,633 INFO L125 PetriNetUnfolderBase]: For 856404/856408 co-relation queries the response was YES. [2024-06-14 14:03:25,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116045 conditions, 14088 events. 9515/14088 cut-off events. For 856404/856408 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 87778 event pairs, 2412 based on Foata normal form. 40/14120 useless extension candidates. Maximal degree in co-relation 115929. Up to 12298 conditions per place. [2024-06-14 14:03:25,825 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 411 selfloop transitions, 57 changer transitions 0/476 dead transitions. [2024-06-14 14:03:25,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 476 transitions, 8113 flow [2024-06-14 14:03:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-14 14:03:25,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-14 14:03:25,826 INFO L175 Difference]: Start difference. First operand has 235 places, 427 transitions, 6817 flow. Second operand 8 states and 235 transitions. [2024-06-14 14:03:25,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 476 transitions, 8113 flow [2024-06-14 14:03:27,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 476 transitions, 7964 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 14:03:27,923 INFO L231 Difference]: Finished difference. Result has 237 places, 429 transitions, 6861 flow [2024-06-14 14:03:27,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6668, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6861, PETRI_PLACES=237, PETRI_TRANSITIONS=429} [2024-06-14 14:03:27,923 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 184 predicate places. [2024-06-14 14:03:27,923 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 429 transitions, 6861 flow [2024-06-14 14:03:27,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:27,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:27,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:27,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 14:03:27,924 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:03:27,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash 482622898, now seen corresponding path program 2 times [2024-06-14 14:03:27,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:27,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216048995] [2024-06-14 14:03:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:27,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:28,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:28,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216048995] [2024-06-14 14:03:28,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216048995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:28,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:28,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:03:28,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750416594] [2024-06-14 14:03:28,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:28,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:03:28,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:03:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:03:28,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:03:28,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 429 transitions, 6861 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:28,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:28,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:03:28,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:30,588 INFO L124 PetriNetUnfolderBase]: 9511/14081 cut-off events. [2024-06-14 14:03:30,589 INFO L125 PetriNetUnfolderBase]: For 839808/839808 co-relation queries the response was YES. [2024-06-14 14:03:30,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116543 conditions, 14081 events. 9511/14081 cut-off events. For 839808/839808 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 87781 event pairs, 2593 based on Foata normal form. 1/14077 useless extension candidates. Maximal degree in co-relation 116426. Up to 13128 conditions per place. [2024-06-14 14:03:30,757 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 413 selfloop transitions, 20 changer transitions 0/441 dead transitions. [2024-06-14 14:03:30,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 441 transitions, 7757 flow [2024-06-14 14:03:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:03:30,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:03:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 14:03:30,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.548 [2024-06-14 14:03:30,758 INFO L175 Difference]: Start difference. First operand has 237 places, 429 transitions, 6861 flow. Second operand 5 states and 137 transitions. [2024-06-14 14:03:30,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 441 transitions, 7757 flow [2024-06-14 14:03:32,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 441 transitions, 7633 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 14:03:32,867 INFO L231 Difference]: Finished difference. Result has 239 places, 429 transitions, 6784 flow [2024-06-14 14:03:32,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6737, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6784, PETRI_PLACES=239, PETRI_TRANSITIONS=429} [2024-06-14 14:03:32,868 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 186 predicate places. [2024-06-14 14:03:32,868 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 429 transitions, 6784 flow [2024-06-14 14:03:32,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:32,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:32,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:32,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 14:03:32,869 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:03:32,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash -547834896, now seen corresponding path program 1 times [2024-06-14 14:03:32,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:32,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363189106] [2024-06-14 14:03:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:32,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:33,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:33,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363189106] [2024-06-14 14:03:33,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363189106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:33,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:33,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:03:33,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668923727] [2024-06-14 14:03:33,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:33,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:03:33,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:33,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:03:33,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:03:33,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:03:33,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 429 transitions, 6784 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:33,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:33,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:03:33,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:35,438 INFO L124 PetriNetUnfolderBase]: 9241/13735 cut-off events. [2024-06-14 14:03:35,438 INFO L125 PetriNetUnfolderBase]: For 880005/880005 co-relation queries the response was YES. [2024-06-14 14:03:35,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114558 conditions, 13735 events. 9241/13735 cut-off events. For 880005/880005 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 86105 event pairs, 2457 based on Foata normal form. 12/13543 useless extension candidates. Maximal degree in co-relation 114439. Up to 12527 conditions per place. [2024-06-14 14:03:35,852 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 394 selfloop transitions, 23 changer transitions 0/448 dead transitions. [2024-06-14 14:03:35,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 448 transitions, 7746 flow [2024-06-14 14:03:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:03:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:03:35,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-14 14:03:35,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-14 14:03:35,853 INFO L175 Difference]: Start difference. First operand has 239 places, 429 transitions, 6784 flow. Second operand 5 states and 145 transitions. [2024-06-14 14:03:35,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 448 transitions, 7746 flow [2024-06-14 14:03:38,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 448 transitions, 7717 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-14 14:03:38,008 INFO L231 Difference]: Finished difference. Result has 243 places, 432 transitions, 6881 flow [2024-06-14 14:03:38,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6881, PETRI_PLACES=243, PETRI_TRANSITIONS=432} [2024-06-14 14:03:38,009 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 190 predicate places. [2024-06-14 14:03:38,009 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 432 transitions, 6881 flow [2024-06-14 14:03:38,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:38,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:38,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:38,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 14:03:38,009 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:03:38,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:38,010 INFO L85 PathProgramCache]: Analyzing trace with hash 32033516, now seen corresponding path program 1 times [2024-06-14 14:03:38,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:38,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802655343] [2024-06-14 14:03:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:38,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:38,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:38,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802655343] [2024-06-14 14:03:38,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802655343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:38,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:38,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:38,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22486174] [2024-06-14 14:03:38,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:38,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:38,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:38,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:38,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:03:38,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 432 transitions, 6881 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:38,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:38,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:03:38,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:40,945 INFO L124 PetriNetUnfolderBase]: 9567/14151 cut-off events. [2024-06-14 14:03:40,945 INFO L125 PetriNetUnfolderBase]: For 890174/890198 co-relation queries the response was YES. [2024-06-14 14:03:41,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117776 conditions, 14151 events. 9567/14151 cut-off events. For 890174/890198 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 88212 event pairs, 2641 based on Foata normal form. 23/14163 useless extension candidates. Maximal degree in co-relation 117655. Up to 12360 conditions per place. [2024-06-14 14:03:41,152 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 302 selfloop transitions, 187 changer transitions 0/497 dead transitions. [2024-06-14 14:03:41,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 497 transitions, 8918 flow [2024-06-14 14:03:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 321 transitions. [2024-06-14 14:03:41,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836363636363636 [2024-06-14 14:03:41,154 INFO L175 Difference]: Start difference. First operand has 243 places, 432 transitions, 6881 flow. Second operand 11 states and 321 transitions. [2024-06-14 14:03:41,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 497 transitions, 8918 flow [2024-06-14 14:03:43,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 497 transitions, 8832 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 14:03:43,024 INFO L231 Difference]: Finished difference. Result has 252 places, 438 transitions, 7341 flow [2024-06-14 14:03:43,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6795, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7341, PETRI_PLACES=252, PETRI_TRANSITIONS=438} [2024-06-14 14:03:43,025 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 199 predicate places. [2024-06-14 14:03:43,025 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 438 transitions, 7341 flow [2024-06-14 14:03:43,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:43,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:43,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:43,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 14:03:43,026 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:03:43,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:43,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1147976156, now seen corresponding path program 2 times [2024-06-14 14:03:43,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:43,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945761720] [2024-06-14 14:03:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:43,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:43,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:43,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945761720] [2024-06-14 14:03:43,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945761720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:43,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:43,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:43,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082199425] [2024-06-14 14:03:43,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:43,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:43,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:43,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:43,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:43,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:03:43,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 438 transitions, 7341 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:43,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:43,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:03:43,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:46,232 INFO L124 PetriNetUnfolderBase]: 9570/14164 cut-off events. [2024-06-14 14:03:46,232 INFO L125 PetriNetUnfolderBase]: For 924960/924984 co-relation queries the response was YES. [2024-06-14 14:03:46,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119659 conditions, 14164 events. 9570/14164 cut-off events. For 924960/924984 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 88385 event pairs, 2641 based on Foata normal form. 23/14176 useless extension candidates. Maximal degree in co-relation 119536. Up to 12366 conditions per place. [2024-06-14 14:03:46,438 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 300 selfloop transitions, 194 changer transitions 0/502 dead transitions. [2024-06-14 14:03:46,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 502 transitions, 9238 flow [2024-06-14 14:03:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:03:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:03:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 363 transitions. [2024-06-14 14:03:46,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584615384615385 [2024-06-14 14:03:46,440 INFO L175 Difference]: Start difference. First operand has 252 places, 438 transitions, 7341 flow. Second operand 13 states and 363 transitions. [2024-06-14 14:03:46,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 502 transitions, 9238 flow [2024-06-14 14:03:48,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 502 transitions, 8899 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-14 14:03:49,004 INFO L231 Difference]: Finished difference. Result has 259 places, 443 transitions, 7536 flow [2024-06-14 14:03:49,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=7012, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7536, PETRI_PLACES=259, PETRI_TRANSITIONS=443} [2024-06-14 14:03:49,019 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 206 predicate places. [2024-06-14 14:03:49,019 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 443 transitions, 7536 flow [2024-06-14 14:03:49,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:49,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:49,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:49,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 14:03:49,020 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:03:49,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:49,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1384451162, now seen corresponding path program 1 times [2024-06-14 14:03:49,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:49,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689643126] [2024-06-14 14:03:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:49,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:49,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:49,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689643126] [2024-06-14 14:03:49,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689643126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:49,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:49,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:49,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875196341] [2024-06-14 14:03:49,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:49,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:03:49,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 443 transitions, 7536 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:49,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:49,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:03:49,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand