./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_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/safe019_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/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe019_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 14:04:25,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:04:25,250 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:04:25,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:04:25,254 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:04:25,278 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:04:25,278 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:04:25,278 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:04:25,279 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:04:25,279 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:04:25,279 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:04:25,280 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:04:25,280 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:04:25,280 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:04:25,281 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:04:25,281 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:04:25,281 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:04:25,282 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:04:25,282 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:04:25,282 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:04:25,282 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:04:25,283 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:04:25,283 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:04:25,283 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:04:25,284 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:04:25,284 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:04:25,284 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:04:25,285 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:04:25,285 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:04:25,285 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:04:25,285 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:04:25,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:04:25,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:04:25,286 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:04:25,286 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:04:25,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:04:25,287 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:04:25,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:04:25,288 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:04:25,288 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:04:25,288 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:04:25,289 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:04:25,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:04:25,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:04:25,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:04:25,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:04:25,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:04:25,502 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:04:25,503 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:04:25,504 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:04:26,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:04:26,903 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:04:26,906 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:04:26,921 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2442076d/31bd3d82f9a7461298dd78bc31befe69/FLAGf84a51e44 [2024-06-14 14:04:26,937 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2442076d/31bd3d82f9a7461298dd78bc31befe69 [2024-06-14 14:04:26,939 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:04:26,940 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:04:26,942 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 14:04:27,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:04:27,079 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:04:27,081 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:04:27,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:04:27,085 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:04:27,085 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:04:26" (1/2) ... [2024-06-14 14:04:27,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24215bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:27, skipping insertion in model container [2024-06-14 14:04:27,087 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:04:26" (1/2) ... [2024-06-14 14:04:27,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@77c82c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:27, skipping insertion in model container [2024-06-14 14:04:27,088 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:04:27" (2/2) ... [2024-06-14 14:04:27,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24215bb2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:04:27, skipping insertion in model container [2024-06-14 14:04:27,088 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:04:27" (2/2) ... [2024-06-14 14:04:27,088 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:04:27,134 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:04:27,135 INFO L97 edCorrectnessWitness]: Location invariant before [L796-L796] (((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! 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_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:04:27,135 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] (((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! 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_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:04:27,136 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] (((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! 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_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:04:27,136 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] (((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! 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_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:04:27,136 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:04:27,137 INFO L106 edCorrectnessWitness]: ghost_update [L789-L789] multithreaded = 1; [2024-06-14 14:04:27,178 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:04:27,448 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:04:27,458 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 14:04:27,608 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:04:27,644 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:04:27,644 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:04:27 WrapperNode [2024-06-14 14:04:27,644 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:04:27,646 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:04:27,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:04:27,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:04:27,651 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,678 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,709 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2024-06-14 14:04:27,709 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:04:27,710 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:04:27,710 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:04:27,711 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:04:27,719 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,719 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,724 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,742 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 14:04:27,743 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,743 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,757 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,758 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,760 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,761 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,768 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:04:27,768 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:04:27,769 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:04:27,769 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:04:27,769 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 02:04:27" (1/1) ... [2024-06-14 14:04:27,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:04:27,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:04:27,822 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 14:04:27,838 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 14:04:27,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:04:27,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:04:27,854 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:04:27,854 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:04:27,854 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:04:27,854 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:04:27,854 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:04:27,854 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:04:27,855 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 14:04:27,855 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 14:04:27,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:04:27,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:04:27,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:04:27,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:04:27,857 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 14:04:27,992 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:04:27,994 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:04:28,281 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:04:28,281 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:04:28,365 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:04:28,366 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:04:28,366 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:04:28 BoogieIcfgContainer [2024-06-14 14:04:28,366 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:04:28,367 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:04:28,368 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:04:28,370 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:04:28,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:04:26" (1/4) ... [2024-06-14 14:04:28,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ca28ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:04:28, skipping insertion in model container [2024-06-14 14:04:28,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:04:27" (2/4) ... [2024-06-14 14:04:28,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ca28ba and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:04:28, skipping insertion in model container [2024-06-14 14:04:28,371 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 02:04:27" (3/4) ... [2024-06-14 14:04:28,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ca28ba and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:04:28, skipping insertion in model container [2024-06-14 14:04:28,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:04:28" (4/4) ... [2024-06-14 14:04:28,372 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:04:28,385 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:04:28,385 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 14:04:28,386 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:04:28,421 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:04:28,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 50 transitions, 116 flow [2024-06-14 14:04:28,464 INFO L124 PetriNetUnfolderBase]: 0/46 cut-off events. [2024-06-14 14:04:28,464 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:04:28,466 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 14:04:28,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 50 transitions, 116 flow [2024-06-14 14:04:28,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 40 transitions, 92 flow [2024-06-14 14:04:28,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:04:28,479 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;@6588ebb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:04:28,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 14:04:28,482 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:04:28,482 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 14:04:28,482 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:04:28,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:28,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:04:28,483 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 14:04:28,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:28,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1396109065, now seen corresponding path program 1 times [2024-06-14 14:04:28,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:28,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861067050] [2024-06-14 14:04:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:28,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:28,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:28,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861067050] [2024-06-14 14:04:28,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861067050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:28,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:28,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:04:28,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53785835] [2024-06-14 14:04:28,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:28,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:04:28,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:04:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:04:29,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-06-14 14:04:29,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:29,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:29,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-06-14 14:04:29,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:29,483 INFO L124 PetriNetUnfolderBase]: 1971/2943 cut-off events. [2024-06-14 14:04:29,484 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-06-14 14:04:29,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5875 conditions, 2943 events. 1971/2943 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16620 event pairs, 1341 based on Foata normal form. 1/2863 useless extension candidates. Maximal degree in co-relation 5859. Up to 2785 conditions per place. [2024-06-14 14:04:29,504 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 38 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-06-14 14:04:29,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 215 flow [2024-06-14 14:04:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:04:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:04:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-14 14:04:29,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2024-06-14 14:04:29,515 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 92 flow. Second operand 3 states and 104 transitions. [2024-06-14 14:04:29,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 215 flow [2024-06-14 14:04:29,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:29,522 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 127 flow [2024-06-14 14:04:29,524 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 14:04:29,526 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-14 14:04:29,526 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 127 flow [2024-06-14 14:04:29,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:29,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:29,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:29,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:04:29,528 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 14:04:29,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash 74239535, now seen corresponding path program 1 times [2024-06-14 14:04:29,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:29,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924124560] [2024-06-14 14:04:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:29,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:29,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:29,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924124560] [2024-06-14 14:04:29,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924124560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:29,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:29,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:29,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623925193] [2024-06-14 14:04:29,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:29,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:29,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:29,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:29,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:04:29,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 127 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 14:04:29,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:29,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:04:29,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:30,344 INFO L124 PetriNetUnfolderBase]: 3439/5046 cut-off events. [2024-06-14 14:04:30,345 INFO L125 PetriNetUnfolderBase]: For 938/956 co-relation queries the response was YES. [2024-06-14 14:04:30,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11668 conditions, 5046 events. 3439/5046 cut-off events. For 938/956 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 27566 event pairs, 1852 based on Foata normal form. 15/5030 useless extension candidates. Maximal degree in co-relation 11653. Up to 4705 conditions per place. [2024-06-14 14:04:30,370 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 49 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-14 14:04:30,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 299 flow [2024-06-14 14:04:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:04:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:04:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-14 14:04:30,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-14 14:04:30,372 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 127 flow. Second operand 4 states and 129 transitions. [2024-06-14 14:04:30,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 299 flow [2024-06-14 14:04:30,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:04:30,374 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 162 flow [2024-06-14 14:04:30,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-14 14:04:30,375 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-06-14 14:04:30,375 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 162 flow [2024-06-14 14:04:30,375 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 14:04:30,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:30,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:30,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:04:30,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:04:30,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:30,376 INFO L85 PathProgramCache]: Analyzing trace with hash -331451323, now seen corresponding path program 1 times [2024-06-14 14:04:30,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:30,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978637664] [2024-06-14 14:04:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:30,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:30,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:30,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978637664] [2024-06-14 14:04:30,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978637664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:30,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:30,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:04:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032746227] [2024-06-14 14:04:30,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:30,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:04:30,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:04:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:04:30,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:04:30,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 162 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 14:04:30,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:30,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:04:30,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:31,130 INFO L124 PetriNetUnfolderBase]: 3382/5002 cut-off events. [2024-06-14 14:04:31,130 INFO L125 PetriNetUnfolderBase]: For 2387/2387 co-relation queries the response was YES. [2024-06-14 14:04:31,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12699 conditions, 5002 events. 3382/5002 cut-off events. For 2387/2387 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27892 event pairs, 1738 based on Foata normal form. 3/4996 useless extension candidates. Maximal degree in co-relation 12682. Up to 4690 conditions per place. [2024-06-14 14:04:31,154 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-14 14:04:31,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 358 flow [2024-06-14 14:04:31,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:04:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:04:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-14 14:04:31,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-14 14:04:31,159 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 162 flow. Second operand 4 states and 126 transitions. [2024-06-14 14:04:31,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 358 flow [2024-06-14 14:04:31,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 336 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:31,163 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 214 flow [2024-06-14 14:04:31,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-14 14:04:31,165 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-06-14 14:04:31,165 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 214 flow [2024-06-14 14:04:31,165 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 14:04:31,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:31,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:31,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:04:31,166 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 14:04:31,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:31,166 INFO L85 PathProgramCache]: Analyzing trace with hash -697114588, now seen corresponding path program 1 times [2024-06-14 14:04:31,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:31,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222895139] [2024-06-14 14:04:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:31,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:31,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:31,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222895139] [2024-06-14 14:04:31,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222895139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:31,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:31,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:04:31,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658375152] [2024-06-14 14:04:31,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:31,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:04:31,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:31,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:04:31,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:04:31,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:04:31,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 214 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 14:04:31,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:31,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:04:31,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:31,893 INFO L124 PetriNetUnfolderBase]: 3367/4973 cut-off events. [2024-06-14 14:04:31,893 INFO L125 PetriNetUnfolderBase]: For 4260/4260 co-relation queries the response was YES. [2024-06-14 14:04:31,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14086 conditions, 4973 events. 3367/4973 cut-off events. For 4260/4260 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27735 event pairs, 1632 based on Foata normal form. 6/4970 useless extension candidates. Maximal degree in co-relation 14067. Up to 4639 conditions per place. [2024-06-14 14:04:31,923 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 61 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-14 14:04:31,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 440 flow [2024-06-14 14:04:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-14 14:04:31,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-14 14:04:31,925 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 214 flow. Second operand 5 states and 154 transitions. [2024-06-14 14:04:31,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 440 flow [2024-06-14 14:04:31,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 436 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 14:04:31,929 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 266 flow [2024-06-14 14:04:31,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-14 14:04:31,930 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-14 14:04:31,930 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 266 flow [2024-06-14 14:04:31,930 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 14:04:31,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:31,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:31,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:04:31,931 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 14:04:31,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash -185775736, now seen corresponding path program 1 times [2024-06-14 14:04:31,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:31,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93453805] [2024-06-14 14:04:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:31,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:32,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:32,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93453805] [2024-06-14 14:04:32,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93453805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:32,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:32,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:32,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83778718] [2024-06-14 14:04:32,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:32,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:32,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:32,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:32,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:32,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:32,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:32,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:32,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:32,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:32,740 INFO L124 PetriNetUnfolderBase]: 4344/6383 cut-off events. [2024-06-14 14:04:32,741 INFO L125 PetriNetUnfolderBase]: For 8370/8382 co-relation queries the response was YES. [2024-06-14 14:04:32,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19313 conditions, 6383 events. 4344/6383 cut-off events. For 8370/8382 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35502 event pairs, 1756 based on Foata normal form. 15/6379 useless extension candidates. Maximal degree in co-relation 19291. Up to 5845 conditions per place. [2024-06-14 14:04:32,775 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 59 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-14 14:04:32,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 514 flow [2024-06-14 14:04:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:04:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:04:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-14 14:04:32,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-14 14:04:32,778 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 266 flow. Second operand 4 states and 129 transitions. [2024-06-14 14:04:32,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 514 flow [2024-06-14 14:04:32,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 484 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:32,785 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 336 flow [2024-06-14 14:04:32,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-06-14 14:04:32,791 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-06-14 14:04:32,791 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 336 flow [2024-06-14 14:04:32,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:32,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:32,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:32,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:04:32,792 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:04:32,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:32,792 INFO L85 PathProgramCache]: Analyzing trace with hash -174037276, now seen corresponding path program 2 times [2024-06-14 14:04:32,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:32,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148330531] [2024-06-14 14:04:32,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:32,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:33,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:33,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148330531] [2024-06-14 14:04:33,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148330531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:33,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:33,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:33,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708913256] [2024-06-14 14:04:33,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:33,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:33,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:33,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:33,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:33,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:33,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:33,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:33,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:33,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:33,641 INFO L124 PetriNetUnfolderBase]: 4335/6390 cut-off events. [2024-06-14 14:04:33,642 INFO L125 PetriNetUnfolderBase]: For 12420/12423 co-relation queries the response was YES. [2024-06-14 14:04:33,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21678 conditions, 6390 events. 4335/6390 cut-off events. For 12420/12423 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 35258 event pairs, 1873 based on Foata normal form. 3/6379 useless extension candidates. Maximal degree in co-relation 21655. Up to 5887 conditions per place. [2024-06-14 14:04:33,676 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 72 selfloop transitions, 20 changer transitions 0/100 dead transitions. [2024-06-14 14:04:33,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 100 transitions, 678 flow [2024-06-14 14:04:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-14 14:04:33,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-14 14:04:33,678 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 336 flow. Second operand 5 states and 154 transitions. [2024-06-14 14:04:33,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 100 transitions, 678 flow [2024-06-14 14:04:33,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 610 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:33,691 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 449 flow [2024-06-14 14:04:33,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=68, PETRI_TRANSITIONS=74} [2024-06-14 14:04:33,693 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-06-14 14:04:33,693 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 449 flow [2024-06-14 14:04:33,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:33,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:33,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:33,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:04:33,694 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:04:33,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1597410852, now seen corresponding path program 1 times [2024-06-14 14:04:33,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:33,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956026329] [2024-06-14 14:04:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:33,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:34,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:34,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956026329] [2024-06-14 14:04:34,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956026329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:34,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:34,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:34,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182888834] [2024-06-14 14:04:34,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:34,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:34,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:34,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:34,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:34,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:04:34,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 74 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:34,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:34,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:04:34,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:34,623 INFO L124 PetriNetUnfolderBase]: 4262/6356 cut-off events. [2024-06-14 14:04:34,623 INFO L125 PetriNetUnfolderBase]: For 13252/13261 co-relation queries the response was YES. [2024-06-14 14:04:34,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21827 conditions, 6356 events. 4262/6356 cut-off events. For 13252/13261 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 35980 event pairs, 1833 based on Foata normal form. 15/6352 useless extension candidates. Maximal degree in co-relation 21801. Up to 5624 conditions per place. [2024-06-14 14:04:34,675 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 69 selfloop transitions, 22 changer transitions 0/104 dead transitions. [2024-06-14 14:04:34,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 753 flow [2024-06-14 14:04:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-14 14:04:34,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608 [2024-06-14 14:04:34,677 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 449 flow. Second operand 5 states and 152 transitions. [2024-06-14 14:04:34,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 753 flow [2024-06-14 14:04:34,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 104 transitions, 721 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-14 14:04:34,688 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 559 flow [2024-06-14 14:04:34,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=559, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-06-14 14:04:34,688 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 21 predicate places. [2024-06-14 14:04:34,688 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 559 flow [2024-06-14 14:04:34,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:34,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:34,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:34,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:04:34,689 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 14:04:34,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:34,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1855309127, now seen corresponding path program 1 times [2024-06-14 14:04:34,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:34,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486017081] [2024-06-14 14:04:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:34,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:34,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486017081] [2024-06-14 14:04:34,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486017081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:34,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:34,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:34,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129735417] [2024-06-14 14:04:34,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:34,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:34,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:34,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:34,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:34,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:34,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 559 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:34,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:34,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:34,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:35,620 INFO L124 PetriNetUnfolderBase]: 5048/7453 cut-off events. [2024-06-14 14:04:35,622 INFO L125 PetriNetUnfolderBase]: For 25439/25460 co-relation queries the response was YES. [2024-06-14 14:04:35,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29868 conditions, 7453 events. 5048/7453 cut-off events. For 25439/25460 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 42214 event pairs, 1223 based on Foata normal form. 42/7478 useless extension candidates. Maximal degree in co-relation 29838. Up to 6126 conditions per place. [2024-06-14 14:04:35,673 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 97 selfloop transitions, 36 changer transitions 0/141 dead transitions. [2024-06-14 14:04:35,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 141 transitions, 1089 flow [2024-06-14 14:04:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-14 14:04:35,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466666666666666 [2024-06-14 14:04:35,676 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 559 flow. Second operand 6 states and 194 transitions. [2024-06-14 14:04:35,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 141 transitions, 1089 flow [2024-06-14 14:04:35,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 141 transitions, 1065 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-14 14:04:35,697 INFO L231 Difference]: Finished difference. Result has 80 places, 96 transitions, 736 flow [2024-06-14 14:04:35,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=736, PETRI_PLACES=80, PETRI_TRANSITIONS=96} [2024-06-14 14:04:35,699 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 27 predicate places. [2024-06-14 14:04:35,699 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 96 transitions, 736 flow [2024-06-14 14:04:35,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:35,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:35,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:35,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:04:35,700 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:04:35,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 998102265, now seen corresponding path program 2 times [2024-06-14 14:04:35,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:35,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743655781] [2024-06-14 14:04:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:35,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:35,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:35,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743655781] [2024-06-14 14:04:35,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743655781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:35,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:35,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:35,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131456726] [2024-06-14 14:04:35,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:35,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:35,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:35,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:35,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:36,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:36,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 96 transitions, 736 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:36,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:36,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:36,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:36,610 INFO L124 PetriNetUnfolderBase]: 4926/7275 cut-off events. [2024-06-14 14:04:36,611 INFO L125 PetriNetUnfolderBase]: For 32214/32235 co-relation queries the response was YES. [2024-06-14 14:04:36,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31233 conditions, 7275 events. 4926/7275 cut-off events. For 32214/32235 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 41053 event pairs, 1530 based on Foata normal form. 60/7318 useless extension candidates. Maximal degree in co-relation 31200. Up to 6305 conditions per place. [2024-06-14 14:04:36,663 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 91 selfloop transitions, 30 changer transitions 0/129 dead transitions. [2024-06-14 14:04:36,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 1101 flow [2024-06-14 14:04:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-14 14:04:36,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644 [2024-06-14 14:04:36,665 INFO L175 Difference]: Start difference. First operand has 80 places, 96 transitions, 736 flow. Second operand 5 states and 161 transitions. [2024-06-14 14:04:36,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 1101 flow [2024-06-14 14:04:36,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 1045 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:36,700 INFO L231 Difference]: Finished difference. Result has 83 places, 97 transitions, 773 flow [2024-06-14 14:04:36,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=773, PETRI_PLACES=83, PETRI_TRANSITIONS=97} [2024-06-14 14:04:36,702 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-06-14 14:04:36,702 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 97 transitions, 773 flow [2024-06-14 14:04:36,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:36,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:36,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:36,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:04:36,703 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:04:36,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1973457257, now seen corresponding path program 3 times [2024-06-14 14:04:36,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:36,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890728647] [2024-06-14 14:04:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:36,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:36,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:36,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890728647] [2024-06-14 14:04:36,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890728647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:36,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:36,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:36,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455049600] [2024-06-14 14:04:36,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:36,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:36,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:36,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:36,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:37,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:37,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 97 transitions, 773 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:37,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:37,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:37,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:37,583 INFO L124 PetriNetUnfolderBase]: 5003/7391 cut-off events. [2024-06-14 14:04:37,583 INFO L125 PetriNetUnfolderBase]: For 35050/35053 co-relation queries the response was YES. [2024-06-14 14:04:37,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32340 conditions, 7391 events. 5003/7391 cut-off events. For 35050/35053 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 41706 event pairs, 1778 based on Foata normal form. 24/7401 useless extension candidates. Maximal degree in co-relation 32305. Up to 6692 conditions per place. [2024-06-14 14:04:37,705 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 106 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-06-14 14:04:37,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 136 transitions, 1169 flow [2024-06-14 14:04:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-14 14:04:37,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-14 14:04:37,707 INFO L175 Difference]: Start difference. First operand has 83 places, 97 transitions, 773 flow. Second operand 6 states and 183 transitions. [2024-06-14 14:04:37,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 136 transitions, 1169 flow [2024-06-14 14:04:37,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 136 transitions, 1117 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:37,742 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 807 flow [2024-06-14 14:04:37,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=807, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-14 14:04:37,744 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 33 predicate places. [2024-06-14 14:04:37,745 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 807 flow [2024-06-14 14:04:37,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:37,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:37,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:37,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:04:37,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:04:37,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:37,747 INFO L85 PathProgramCache]: Analyzing trace with hash 254108709, now seen corresponding path program 1 times [2024-06-14 14:04:37,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:37,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562237342] [2024-06-14 14:04:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:37,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:37,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:37,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562237342] [2024-06-14 14:04:37,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562237342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:37,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:37,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:37,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270801832] [2024-06-14 14:04:37,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:37,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:37,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:37,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:38,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:38,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 807 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:38,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:38,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:38,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:38,652 INFO L124 PetriNetUnfolderBase]: 4964/7334 cut-off events. [2024-06-14 14:04:38,653 INFO L125 PetriNetUnfolderBase]: For 39370/39373 co-relation queries the response was YES. [2024-06-14 14:04:38,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32688 conditions, 7334 events. 4964/7334 cut-off events. For 39370/39373 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 41363 event pairs, 1514 based on Foata normal form. 18/7338 useless extension candidates. Maximal degree in co-relation 32652. Up to 6293 conditions per place. [2024-06-14 14:04:38,699 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 106 selfloop transitions, 28 changer transitions 0/142 dead transitions. [2024-06-14 14:04:38,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 142 transitions, 1238 flow [2024-06-14 14:04:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-14 14:04:38,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-14 14:04:38,700 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 807 flow. Second operand 6 states and 185 transitions. [2024-06-14 14:04:38,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 142 transitions, 1238 flow [2024-06-14 14:04:38,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 142 transitions, 1182 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:38,735 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 863 flow [2024-06-14 14:04:38,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=863, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-06-14 14:04:38,735 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 35 predicate places. [2024-06-14 14:04:38,736 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 863 flow [2024-06-14 14:04:38,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:38,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:38,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:38,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:04:38,736 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 14:04:38,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1189371272, now seen corresponding path program 1 times [2024-06-14 14:04:38,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:38,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765468178] [2024-06-14 14:04:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:38,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:38,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765468178] [2024-06-14 14:04:38,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765468178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:38,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:38,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:04:38,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531794934] [2024-06-14 14:04:38,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:38,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:04:38,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:38,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:04:38,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:04:38,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:04:38,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 863 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 14:04:38,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:38,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:04:38,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:39,551 INFO L124 PetriNetUnfolderBase]: 4564/6784 cut-off events. [2024-06-14 14:04:39,551 INFO L125 PetriNetUnfolderBase]: For 45681/45713 co-relation queries the response was YES. [2024-06-14 14:04:39,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31879 conditions, 6784 events. 4564/6784 cut-off events. For 45681/45713 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 39079 event pairs, 1778 based on Foata normal form. 6/6641 useless extension candidates. Maximal degree in co-relation 31841. Up to 6226 conditions per place. [2024-06-14 14:04:39,596 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 102 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2024-06-14 14:04:39,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 133 transitions, 1266 flow [2024-06-14 14:04:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-14 14:04:39,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-14 14:04:39,601 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 863 flow. Second operand 5 states and 151 transitions. [2024-06-14 14:04:39,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 133 transitions, 1266 flow [2024-06-14 14:04:39,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 1205 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:39,643 INFO L231 Difference]: Finished difference. Result has 92 places, 112 transitions, 994 flow [2024-06-14 14:04:39,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=994, PETRI_PLACES=92, PETRI_TRANSITIONS=112} [2024-06-14 14:04:39,644 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-06-14 14:04:39,644 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 112 transitions, 994 flow [2024-06-14 14:04:39,644 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 14:04:39,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:39,644 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 14:04:39,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:04:39,644 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 14:04:39,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:39,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1116191325, now seen corresponding path program 1 times [2024-06-14 14:04:39,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:39,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826787056] [2024-06-14 14:04:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:39,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:39,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:39,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826787056] [2024-06-14 14:04:39,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826787056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:39,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:39,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:39,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607728225] [2024-06-14 14:04:39,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:39,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:39,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:39,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:39,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:39,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:04:39,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 112 transitions, 994 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:39,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:39,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:04:39,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:40,654 INFO L124 PetriNetUnfolderBase]: 4770/7121 cut-off events. [2024-06-14 14:04:40,655 INFO L125 PetriNetUnfolderBase]: For 47776/47794 co-relation queries the response was YES. [2024-06-14 14:04:40,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33686 conditions, 7121 events. 4770/7121 cut-off events. For 47776/47794 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 40873 event pairs, 1737 based on Foata normal form. 18/7109 useless extension candidates. Maximal degree in co-relation 33645. Up to 6294 conditions per place. [2024-06-14 14:04:40,712 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 95 selfloop transitions, 38 changer transitions 0/149 dead transitions. [2024-06-14 14:04:40,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 149 transitions, 1492 flow [2024-06-14 14:04:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:40,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-14 14:04:40,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-06-14 14:04:40,714 INFO L175 Difference]: Start difference. First operand has 92 places, 112 transitions, 994 flow. Second operand 6 states and 178 transitions. [2024-06-14 14:04:40,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 149 transitions, 1492 flow [2024-06-14 14:04:40,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1450 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-14 14:04:40,780 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 1180 flow [2024-06-14 14:04:40,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1180, PETRI_PLACES=99, PETRI_TRANSITIONS=126} [2024-06-14 14:04:40,781 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 46 predicate places. [2024-06-14 14:04:40,781 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 1180 flow [2024-06-14 14:04:40,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:40,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:40,782 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 14:04:40,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:04:40,782 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 14:04:40,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:40,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1094420563, now seen corresponding path program 1 times [2024-06-14 14:04:40,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:40,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230556258] [2024-06-14 14:04:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:40,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:41,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:41,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230556258] [2024-06-14 14:04:41,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230556258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:41,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:41,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:41,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060717788] [2024-06-14 14:04:41,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:41,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:41,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:41,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:41,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:41,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:41,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 126 transitions, 1180 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:41,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:41,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:41,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:41,890 INFO L124 PetriNetUnfolderBase]: 5130/7653 cut-off events. [2024-06-14 14:04:41,890 INFO L125 PetriNetUnfolderBase]: For 63055/63082 co-relation queries the response was YES. [2024-06-14 14:04:41,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38914 conditions, 7653 events. 5130/7653 cut-off events. For 63055/63082 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 43919 event pairs, 1716 based on Foata normal form. 24/7668 useless extension candidates. Maximal degree in co-relation 38869. Up to 6791 conditions per place. [2024-06-14 14:04:41,946 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 142 selfloop transitions, 47 changer transitions 0/197 dead transitions. [2024-06-14 14:04:41,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 197 transitions, 2081 flow [2024-06-14 14:04:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:04:41,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:04:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 259 transitions. [2024-06-14 14:04:41,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755555555555556 [2024-06-14 14:04:41,948 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 1180 flow. Second operand 9 states and 259 transitions. [2024-06-14 14:04:41,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 197 transitions, 2081 flow [2024-06-14 14:04:42,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 197 transitions, 2016 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-14 14:04:42,023 INFO L231 Difference]: Finished difference. Result has 110 places, 151 transitions, 1516 flow [2024-06-14 14:04:42,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1516, PETRI_PLACES=110, PETRI_TRANSITIONS=151} [2024-06-14 14:04:42,024 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 57 predicate places. [2024-06-14 14:04:42,024 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 151 transitions, 1516 flow [2024-06-14 14:04:42,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:42,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:42,024 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 14:04:42,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:04:42,024 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 14:04:42,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1116017973, now seen corresponding path program 2 times [2024-06-14 14:04:42,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:42,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294680526] [2024-06-14 14:04:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:42,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:42,277 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 14:04:42,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:42,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294680526] [2024-06-14 14:04:42,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294680526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:42,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:42,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:42,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371279181] [2024-06-14 14:04:42,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:42,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:42,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:42,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:42,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:42,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:42,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 151 transitions, 1516 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:42,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:42,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:42,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:43,186 INFO L124 PetriNetUnfolderBase]: 5358/7986 cut-off events. [2024-06-14 14:04:43,186 INFO L125 PetriNetUnfolderBase]: For 79272/79293 co-relation queries the response was YES. [2024-06-14 14:04:43,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43766 conditions, 7986 events. 5358/7986 cut-off events. For 79272/79293 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 45982 event pairs, 1719 based on Foata normal form. 21/7994 useless extension candidates. Maximal degree in co-relation 43716. Up to 7003 conditions per place. [2024-06-14 14:04:43,236 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 140 selfloop transitions, 64 changer transitions 0/212 dead transitions. [2024-06-14 14:04:43,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 212 transitions, 2500 flow [2024-06-14 14:04:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:43,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-14 14:04:43,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-14 14:04:43,238 INFO L175 Difference]: Start difference. First operand has 110 places, 151 transitions, 1516 flow. Second operand 6 states and 188 transitions. [2024-06-14 14:04:43,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 212 transitions, 2500 flow [2024-06-14 14:04:43,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 212 transitions, 2336 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:43,353 INFO L231 Difference]: Finished difference. Result has 113 places, 179 transitions, 1915 flow [2024-06-14 14:04:43,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1915, PETRI_PLACES=113, PETRI_TRANSITIONS=179} [2024-06-14 14:04:43,354 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 60 predicate places. [2024-06-14 14:04:43,354 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 179 transitions, 1915 flow [2024-06-14 14:04:43,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:43,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:43,355 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 14:04:43,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:04:43,355 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 14:04:43,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:43,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1115810583, now seen corresponding path program 3 times [2024-06-14 14:04:43,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:43,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987483600] [2024-06-14 14:04:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:43,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:43,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:43,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987483600] [2024-06-14 14:04:43,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987483600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:43,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:43,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:43,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472304582] [2024-06-14 14:04:43,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:43,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:43,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:43,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:43,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:43,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:43,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 179 transitions, 1915 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:43,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:43,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:43,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:44,535 INFO L124 PetriNetUnfolderBase]: 5367/8006 cut-off events. [2024-06-14 14:04:44,536 INFO L125 PetriNetUnfolderBase]: For 93345/93366 co-relation queries the response was YES. [2024-06-14 14:04:44,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46560 conditions, 8006 events. 5367/8006 cut-off events. For 93345/93366 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 46202 event pairs, 1718 based on Foata normal form. 21/8014 useless extension candidates. Maximal degree in co-relation 46508. Up to 7021 conditions per place. [2024-06-14 14:04:44,588 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 142 selfloop transitions, 76 changer transitions 0/226 dead transitions. [2024-06-14 14:04:44,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 226 transitions, 2684 flow [2024-06-14 14:04:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-14 14:04:44,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-14 14:04:44,590 INFO L175 Difference]: Start difference. First operand has 113 places, 179 transitions, 1915 flow. Second operand 8 states and 237 transitions. [2024-06-14 14:04:44,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 226 transitions, 2684 flow [2024-06-14 14:04:44,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 226 transitions, 2567 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:44,716 INFO L231 Difference]: Finished difference. Result has 119 places, 189 transitions, 2094 flow [2024-06-14 14:04:44,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2094, PETRI_PLACES=119, PETRI_TRANSITIONS=189} [2024-06-14 14:04:44,717 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 66 predicate places. [2024-06-14 14:04:44,717 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 189 transitions, 2094 flow [2024-06-14 14:04:44,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:44,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:44,717 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 14:04:44,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:04:44,718 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 14:04:44,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1115802647, now seen corresponding path program 1 times [2024-06-14 14:04:44,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:44,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723048127] [2024-06-14 14:04:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:44,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:45,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:45,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723048127] [2024-06-14 14:04:45,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723048127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:45,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:45,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:45,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028279603] [2024-06-14 14:04:45,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:45,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:45,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:45,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:45,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:45,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:04:45,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 189 transitions, 2094 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:45,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:45,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:04:45,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:46,039 INFO L124 PetriNetUnfolderBase]: 5583/8355 cut-off events. [2024-06-14 14:04:46,039 INFO L125 PetriNetUnfolderBase]: For 110088/110132 co-relation queries the response was YES. [2024-06-14 14:04:46,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48657 conditions, 8355 events. 5583/8355 cut-off events. For 110088/110132 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 49022 event pairs, 1757 based on Foata normal form. 78/8395 useless extension candidates. Maximal degree in co-relation 48603. Up to 6900 conditions per place. [2024-06-14 14:04:46,112 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 161 selfloop transitions, 34 changer transitions 0/220 dead transitions. [2024-06-14 14:04:46,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 220 transitions, 2684 flow [2024-06-14 14:04:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 14:04:46,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-14 14:04:46,114 INFO L175 Difference]: Start difference. First operand has 119 places, 189 transitions, 2094 flow. Second operand 6 states and 181 transitions. [2024-06-14 14:04:46,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 220 transitions, 2684 flow [2024-06-14 14:04:46,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 220 transitions, 2484 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:46,235 INFO L231 Difference]: Finished difference. Result has 119 places, 192 transitions, 2032 flow [2024-06-14 14:04:46,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2032, PETRI_PLACES=119, PETRI_TRANSITIONS=192} [2024-06-14 14:04:46,236 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 66 predicate places. [2024-06-14 14:04:46,236 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 192 transitions, 2032 flow [2024-06-14 14:04:46,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:46,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:46,236 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 14:04:46,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:04:46,237 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:04:46,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:46,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1904061804, now seen corresponding path program 1 times [2024-06-14 14:04:46,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:46,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675779990] [2024-06-14 14:04:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:46,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:46,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:46,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675779990] [2024-06-14 14:04:46,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675779990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:46,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:46,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:46,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384877769] [2024-06-14 14:04:46,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:46,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:46,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:46,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:04:46,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 192 transitions, 2032 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:46,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:46,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:04:46,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:47,455 INFO L124 PetriNetUnfolderBase]: 5187/7758 cut-off events. [2024-06-14 14:04:47,455 INFO L125 PetriNetUnfolderBase]: For 117840/118080 co-relation queries the response was YES. [2024-06-14 14:04:47,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47008 conditions, 7758 events. 5187/7758 cut-off events. For 117840/118080 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 46000 event pairs, 1642 based on Foata normal form. 12/7596 useless extension candidates. Maximal degree in co-relation 46953. Up to 6669 conditions per place. [2024-06-14 14:04:47,538 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 136 selfloop transitions, 31 changer transitions 0/208 dead transitions. [2024-06-14 14:04:47,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 208 transitions, 2420 flow [2024-06-14 14:04:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:47,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:47,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-14 14:04:47,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-14 14:04:47,540 INFO L175 Difference]: Start difference. First operand has 119 places, 192 transitions, 2032 flow. Second operand 5 states and 151 transitions. [2024-06-14 14:04:47,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 208 transitions, 2420 flow [2024-06-14 14:04:47,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 208 transitions, 2310 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:47,751 INFO L231 Difference]: Finished difference. Result has 120 places, 192 transitions, 2000 flow [2024-06-14 14:04:47,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2000, PETRI_PLACES=120, PETRI_TRANSITIONS=192} [2024-06-14 14:04:47,751 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 67 predicate places. [2024-06-14 14:04:47,751 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 192 transitions, 2000 flow [2024-06-14 14:04:47,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:47,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:47,752 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 14:04:47,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:04:47,752 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:04:47,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:47,753 INFO L85 PathProgramCache]: Analyzing trace with hash 521689447, now seen corresponding path program 1 times [2024-06-14 14:04:47,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:47,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627532286] [2024-06-14 14:04:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:47,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:47,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:47,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627532286] [2024-06-14 14:04:47,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627532286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:47,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:47,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:47,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768293076] [2024-06-14 14:04:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:47,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:47,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:48,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:04:48,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 192 transitions, 2000 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 14:04:48,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:48,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:04:48,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:48,874 INFO L124 PetriNetUnfolderBase]: 5465/8076 cut-off events. [2024-06-14 14:04:48,874 INFO L125 PetriNetUnfolderBase]: For 122641/123013 co-relation queries the response was YES. [2024-06-14 14:04:48,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49111 conditions, 8076 events. 5465/8076 cut-off events. For 122641/123013 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 46674 event pairs, 1650 based on Foata normal form. 10/7916 useless extension candidates. Maximal degree in co-relation 49055. Up to 7195 conditions per place. [2024-06-14 14:04:48,935 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 178 selfloop transitions, 36 changer transitions 0/232 dead transitions. [2024-06-14 14:04:48,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 232 transitions, 2734 flow [2024-06-14 14:04:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-14 14:04:48,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2024-06-14 14:04:48,936 INFO L175 Difference]: Start difference. First operand has 120 places, 192 transitions, 2000 flow. Second operand 6 states and 182 transitions. [2024-06-14 14:04:48,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 232 transitions, 2734 flow [2024-06-14 14:04:49,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 232 transitions, 2672 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:49,053 INFO L231 Difference]: Finished difference. Result has 123 places, 200 transitions, 2202 flow [2024-06-14 14:04:49,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2202, PETRI_PLACES=123, PETRI_TRANSITIONS=200} [2024-06-14 14:04:49,053 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 70 predicate places. [2024-06-14 14:04:49,053 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 200 transitions, 2202 flow [2024-06-14 14:04:49,054 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 14:04:49,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:49,054 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 14:04:49,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:04:49,054 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 14:04:49,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:49,055 INFO L85 PathProgramCache]: Analyzing trace with hash 432697851, now seen corresponding path program 2 times [2024-06-14 14:04:49,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:49,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329020766] [2024-06-14 14:04:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:49,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:49,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:49,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329020766] [2024-06-14 14:04:49,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329020766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:49,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:49,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:49,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204991435] [2024-06-14 14:04:49,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:49,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:49,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:49,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:04:49,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 200 transitions, 2202 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 14:04:49,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:49,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:04:49,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:50,135 INFO L124 PetriNetUnfolderBase]: 5443/8038 cut-off events. [2024-06-14 14:04:50,136 INFO L125 PetriNetUnfolderBase]: For 135923/136279 co-relation queries the response was YES. [2024-06-14 14:04:50,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50321 conditions, 8038 events. 5443/8038 cut-off events. For 135923/136279 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 46478 event pairs, 1769 based on Foata normal form. 10/7882 useless extension candidates. Maximal degree in co-relation 50263. Up to 7276 conditions per place. [2024-06-14 14:04:50,210 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 179 selfloop transitions, 29 changer transitions 0/226 dead transitions. [2024-06-14 14:04:50,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 226 transitions, 2684 flow [2024-06-14 14:04:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-14 14:04:50,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-06-14 14:04:50,212 INFO L175 Difference]: Start difference. First operand has 123 places, 200 transitions, 2202 flow. Second operand 6 states and 176 transitions. [2024-06-14 14:04:50,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 226 transitions, 2684 flow [2024-06-14 14:04:50,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 226 transitions, 2564 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:50,399 INFO L231 Difference]: Finished difference. Result has 127 places, 200 transitions, 2148 flow [2024-06-14 14:04:50,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2148, PETRI_PLACES=127, PETRI_TRANSITIONS=200} [2024-06-14 14:04:50,400 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 74 predicate places. [2024-06-14 14:04:50,400 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 200 transitions, 2148 flow [2024-06-14 14:04:50,400 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 14:04:50,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:50,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:50,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:04:50,401 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 14:04:50,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:50,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1028030029, now seen corresponding path program 1 times [2024-06-14 14:04:50,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:50,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475317506] [2024-06-14 14:04:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:50,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:50,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:50,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475317506] [2024-06-14 14:04:50,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475317506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:50,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:50,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:50,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174353577] [2024-06-14 14:04:50,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:50,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:50,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:50,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:50,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 200 transitions, 2148 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 14:04:50,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:50,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:50,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:51,511 INFO L124 PetriNetUnfolderBase]: 5682/8379 cut-off events. [2024-06-14 14:04:51,511 INFO L125 PetriNetUnfolderBase]: For 134437/134458 co-relation queries the response was YES. [2024-06-14 14:04:51,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51532 conditions, 8379 events. 5682/8379 cut-off events. For 134437/134458 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 47960 event pairs, 1714 based on Foata normal form. 14/8380 useless extension candidates. Maximal degree in co-relation 51472. Up to 7653 conditions per place. [2024-06-14 14:04:51,582 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 176 selfloop transitions, 43 changer transitions 0/227 dead transitions. [2024-06-14 14:04:51,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 227 transitions, 2752 flow [2024-06-14 14:04:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-14 14:04:51,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.612 [2024-06-14 14:04:51,584 INFO L175 Difference]: Start difference. First operand has 127 places, 200 transitions, 2148 flow. Second operand 5 states and 153 transitions. [2024-06-14 14:04:51,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 227 transitions, 2752 flow [2024-06-14 14:04:51,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 227 transitions, 2688 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:51,763 INFO L231 Difference]: Finished difference. Result has 128 places, 204 transitions, 2273 flow [2024-06-14 14:04:51,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2273, PETRI_PLACES=128, PETRI_TRANSITIONS=204} [2024-06-14 14:04:51,764 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 75 predicate places. [2024-06-14 14:04:51,764 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 204 transitions, 2273 flow [2024-06-14 14:04:51,764 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 14:04:51,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:51,765 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 14:04:51,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:04:51,765 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 14:04:51,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash -912479389, now seen corresponding path program 2 times [2024-06-14 14:04:51,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:51,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028259653] [2024-06-14 14:04:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:51,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:51,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028259653] [2024-06-14 14:04:51,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028259653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:51,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:51,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:51,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330796758] [2024-06-14 14:04:51,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:51,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:51,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:52,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:52,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 204 transitions, 2273 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 14:04:52,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:52,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:52,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:52,917 INFO L124 PetriNetUnfolderBase]: 5698/8461 cut-off events. [2024-06-14 14:04:52,918 INFO L125 PetriNetUnfolderBase]: For 150629/150650 co-relation queries the response was YES. [2024-06-14 14:04:52,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53450 conditions, 8461 events. 5698/8461 cut-off events. For 150629/150650 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 49130 event pairs, 1714 based on Foata normal form. 14/8462 useless extension candidates. Maximal degree in co-relation 53389. Up to 7621 conditions per place. [2024-06-14 14:04:52,999 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 184 selfloop transitions, 52 changer transitions 0/244 dead transitions. [2024-06-14 14:04:52,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 244 transitions, 3107 flow [2024-06-14 14:04:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 14:04:53,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-14 14:04:53,000 INFO L175 Difference]: Start difference. First operand has 128 places, 204 transitions, 2273 flow. Second operand 6 states and 181 transitions. [2024-06-14 14:04:53,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 244 transitions, 3107 flow [2024-06-14 14:04:53,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 244 transitions, 2984 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:53,246 INFO L231 Difference]: Finished difference. Result has 131 places, 212 transitions, 2447 flow [2024-06-14 14:04:53,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2447, PETRI_PLACES=131, PETRI_TRANSITIONS=212} [2024-06-14 14:04:53,247 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 78 predicate places. [2024-06-14 14:04:53,247 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 212 transitions, 2447 flow [2024-06-14 14:04:53,247 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 14:04:53,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:53,247 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 14:04:53,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:04:53,247 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 14:04:53,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash -912470089, now seen corresponding path program 3 times [2024-06-14 14:04:53,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:53,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519854927] [2024-06-14 14:04:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:53,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:53,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:53,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519854927] [2024-06-14 14:04:53,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519854927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:53,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:53,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:53,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737769188] [2024-06-14 14:04:53,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:53,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:53,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:53,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:53,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:53,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:53,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 212 transitions, 2447 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 14:04:53,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:53,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:53,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:54,512 INFO L124 PetriNetUnfolderBase]: 5714/8487 cut-off events. [2024-06-14 14:04:54,513 INFO L125 PetriNetUnfolderBase]: For 167290/167311 co-relation queries the response was YES. [2024-06-14 14:04:54,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55258 conditions, 8487 events. 5714/8487 cut-off events. For 167290/167311 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 49317 event pairs, 1714 based on Foata normal form. 14/8488 useless extension candidates. Maximal degree in co-relation 55196. Up to 7638 conditions per place. [2024-06-14 14:04:54,595 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 182 selfloop transitions, 55 changer transitions 0/245 dead transitions. [2024-06-14 14:04:54,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 245 transitions, 3199 flow [2024-06-14 14:04:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-14 14:04:54,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-06-14 14:04:54,597 INFO L175 Difference]: Start difference. First operand has 131 places, 212 transitions, 2447 flow. Second operand 6 states and 179 transitions. [2024-06-14 14:04:54,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 245 transitions, 3199 flow [2024-06-14 14:04:54,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 245 transitions, 3027 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:54,850 INFO L231 Difference]: Finished difference. Result has 135 places, 216 transitions, 2490 flow [2024-06-14 14:04:54,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2490, PETRI_PLACES=135, PETRI_TRANSITIONS=216} [2024-06-14 14:04:54,851 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 82 predicate places. [2024-06-14 14:04:54,851 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 216 transitions, 2490 flow [2024-06-14 14:04:54,851 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 14:04:54,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:54,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:54,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:04:54,852 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 14:04:54,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash -934067499, now seen corresponding path program 4 times [2024-06-14 14:04:54,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:54,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725443190] [2024-06-14 14:04:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:54,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:55,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:55,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725443190] [2024-06-14 14:04:55,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725443190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:55,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:55,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:55,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839347763] [2024-06-14 14:04:55,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:55,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:55,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:55,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:55,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:55,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:55,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 216 transitions, 2490 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 14:04:55,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:55,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:55,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:56,153 INFO L124 PetriNetUnfolderBase]: 5707/8478 cut-off events. [2024-06-14 14:04:56,153 INFO L125 PetriNetUnfolderBase]: For 174556/174577 co-relation queries the response was YES. [2024-06-14 14:04:56,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55613 conditions, 8478 events. 5707/8478 cut-off events. For 174556/174577 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 49269 event pairs, 1714 based on Foata normal form. 14/8479 useless extension candidates. Maximal degree in co-relation 55549. Up to 7686 conditions per place. [2024-06-14 14:04:56,382 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 190 selfloop transitions, 43 changer transitions 0/241 dead transitions. [2024-06-14 14:04:56,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 241 transitions, 3034 flow [2024-06-14 14:04:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-14 14:04:56,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 14:04:56,385 INFO L175 Difference]: Start difference. First operand has 135 places, 216 transitions, 2490 flow. Second operand 5 states and 155 transitions. [2024-06-14 14:04:56,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 241 transitions, 3034 flow [2024-06-14 14:04:56,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 241 transitions, 2853 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:56,649 INFO L231 Difference]: Finished difference. Result has 137 places, 216 transitions, 2411 flow [2024-06-14 14:04:56,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2309, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2411, PETRI_PLACES=137, PETRI_TRANSITIONS=216} [2024-06-14 14:04:56,650 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 84 predicate places. [2024-06-14 14:04:56,650 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 216 transitions, 2411 flow [2024-06-14 14:04:56,650 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 14:04:56,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:56,650 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 14:04:56,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:04:56,651 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 14:04:56,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:56,651 INFO L85 PathProgramCache]: Analyzing trace with hash -349029910, now seen corresponding path program 1 times [2024-06-14 14:04:56,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:56,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432803095] [2024-06-14 14:04:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:56,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:56,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:56,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432803095] [2024-06-14 14:04:56,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432803095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:56,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:56,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:56,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024626153] [2024-06-14 14:04:56,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:56,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:56,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:56,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:56,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:56,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 216 transitions, 2411 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:56,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:56,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:56,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:57,954 INFO L124 PetriNetUnfolderBase]: 5766/8594 cut-off events. [2024-06-14 14:04:57,954 INFO L125 PetriNetUnfolderBase]: For 182405/182432 co-relation queries the response was YES. [2024-06-14 14:04:57,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56538 conditions, 8594 events. 5766/8594 cut-off events. For 182405/182432 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50007 event pairs, 1696 based on Foata normal form. 21/8606 useless extension candidates. Maximal degree in co-relation 56473. Up to 7488 conditions per place. [2024-06-14 14:04:58,037 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 201 selfloop transitions, 91 changer transitions 0/300 dead transitions. [2024-06-14 14:04:58,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 300 transitions, 3869 flow [2024-06-14 14:04:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-06-14 14:04:58,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-14 14:04:58,038 INFO L175 Difference]: Start difference. First operand has 137 places, 216 transitions, 2411 flow. Second operand 10 states and 285 transitions. [2024-06-14 14:04:58,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 300 transitions, 3869 flow [2024-06-14 14:04:58,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 300 transitions, 3748 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:58,283 INFO L231 Difference]: Finished difference. Result has 145 places, 245 transitions, 2926 flow [2024-06-14 14:04:58,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2926, PETRI_PLACES=145, PETRI_TRANSITIONS=245} [2024-06-14 14:04:58,284 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 92 predicate places. [2024-06-14 14:04:58,284 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 245 transitions, 2926 flow [2024-06-14 14:04:58,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:58,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:58,285 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 14:04:58,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:04:58,285 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 14:04:58,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:58,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1248212812, now seen corresponding path program 2 times [2024-06-14 14:04:58,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:58,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210613882] [2024-06-14 14:04:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:58,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:58,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:58,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210613882] [2024-06-14 14:04:58,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210613882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:58,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:58,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:58,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110146415] [2024-06-14 14:04:58,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:58,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:58,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:58,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:58,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:58,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:04:58,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 245 transitions, 2926 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 14:04:58,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:58,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:04:58,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:59,704 INFO L124 PetriNetUnfolderBase]: 5769/8580 cut-off events. [2024-06-14 14:04:59,704 INFO L125 PetriNetUnfolderBase]: For 205984/206005 co-relation queries the response was YES. [2024-06-14 14:04:59,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59721 conditions, 8580 events. 5769/8580 cut-off events. For 205984/206005 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 50011 event pairs, 1710 based on Foata normal form. 15/8582 useless extension candidates. Maximal degree in co-relation 59652. Up to 7778 conditions per place. [2024-06-14 14:04:59,805 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 227 selfloop transitions, 49 changer transitions 0/284 dead transitions. [2024-06-14 14:04:59,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 284 transitions, 3772 flow [2024-06-14 14:04:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-14 14:04:59,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5828571428571429 [2024-06-14 14:04:59,807 INFO L175 Difference]: Start difference. First operand has 145 places, 245 transitions, 2926 flow. Second operand 7 states and 204 transitions. [2024-06-14 14:04:59,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 284 transitions, 3772 flow [2024-06-14 14:05:00,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 284 transitions, 3602 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:00,220 INFO L231 Difference]: Finished difference. Result has 150 places, 253 transitions, 3032 flow [2024-06-14 14:05:00,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3032, PETRI_PLACES=150, PETRI_TRANSITIONS=253} [2024-06-14 14:05:00,221 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 97 predicate places. [2024-06-14 14:05:00,221 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 253 transitions, 3032 flow [2024-06-14 14:05:00,221 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 14:05:00,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:00,222 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 14:05:00,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:05:00,222 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 14:05:00,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:00,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1442186632, now seen corresponding path program 3 times [2024-06-14 14:05:00,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:00,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368362924] [2024-06-14 14:05:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:00,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:00,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:00,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368362924] [2024-06-14 14:05:00,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368362924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:00,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:00,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:00,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479349542] [2024-06-14 14:05:00,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:00,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:00,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:00,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:00,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:00,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:00,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 253 transitions, 3032 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:00,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:00,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:00,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:01,804 INFO L124 PetriNetUnfolderBase]: 5881/8770 cut-off events. [2024-06-14 14:05:01,804 INFO L125 PetriNetUnfolderBase]: For 221007/221028 co-relation queries the response was YES. [2024-06-14 14:05:01,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61855 conditions, 8770 events. 5881/8770 cut-off events. For 221007/221028 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 51192 event pairs, 1719 based on Foata normal form. 18/8775 useless extension candidates. Maximal degree in co-relation 61783. Up to 7522 conditions per place. [2024-06-14 14:05:01,910 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 176 selfloop transitions, 146 changer transitions 0/330 dead transitions. [2024-06-14 14:05:01,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 330 transitions, 4608 flow [2024-06-14 14:05:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-06-14 14:05:01,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582 [2024-06-14 14:05:01,911 INFO L175 Difference]: Start difference. First operand has 150 places, 253 transitions, 3032 flow. Second operand 10 states and 291 transitions. [2024-06-14 14:05:01,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 330 transitions, 4608 flow [2024-06-14 14:05:02,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 330 transitions, 4426 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:02,447 INFO L231 Difference]: Finished difference. Result has 158 places, 281 transitions, 3678 flow [2024-06-14 14:05:02,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2850, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3678, PETRI_PLACES=158, PETRI_TRANSITIONS=281} [2024-06-14 14:05:02,447 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 105 predicate places. [2024-06-14 14:05:02,447 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 281 transitions, 3678 flow [2024-06-14 14:05:02,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:02,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:02,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:05:02,448 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 14:05:02,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1447900552, now seen corresponding path program 4 times [2024-06-14 14:05:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:02,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843616460] [2024-06-14 14:05:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:02,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:02,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843616460] [2024-06-14 14:05:02,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843616460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:02,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:02,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:02,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773914983] [2024-06-14 14:05:02,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:02,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:02,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:02,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:02,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:02,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 281 transitions, 3678 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:02,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:02,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:04,025 INFO L124 PetriNetUnfolderBase]: 5926/8834 cut-off events. [2024-06-14 14:05:04,025 INFO L125 PetriNetUnfolderBase]: For 246063/246078 co-relation queries the response was YES. [2024-06-14 14:05:04,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65568 conditions, 8834 events. 5926/8834 cut-off events. For 246063/246078 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 51624 event pairs, 1719 based on Foata normal form. 11/8832 useless extension candidates. Maximal degree in co-relation 65494. Up to 7569 conditions per place. [2024-06-14 14:05:04,114 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 173 selfloop transitions, 157 changer transitions 0/338 dead transitions. [2024-06-14 14:05:04,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 338 transitions, 5036 flow [2024-06-14 14:05:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2024-06-14 14:05:04,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911111111111111 [2024-06-14 14:05:04,115 INFO L175 Difference]: Start difference. First operand has 158 places, 281 transitions, 3678 flow. Second operand 9 states and 266 transitions. [2024-06-14 14:05:04,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 338 transitions, 5036 flow [2024-06-14 14:05:04,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 338 transitions, 4762 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:04,616 INFO L231 Difference]: Finished difference. Result has 163 places, 294 transitions, 3951 flow [2024-06-14 14:05:04,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3951, PETRI_PLACES=163, PETRI_TRANSITIONS=294} [2024-06-14 14:05:04,616 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 110 predicate places. [2024-06-14 14:05:04,616 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 294 transitions, 3951 flow [2024-06-14 14:05:04,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:04,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:04,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:04,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:05:04,617 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 14:05:04,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:04,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1248598762, now seen corresponding path program 5 times [2024-06-14 14:05:04,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:04,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293752245] [2024-06-14 14:05:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:04,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:04,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:04,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293752245] [2024-06-14 14:05:04,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293752245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:04,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:04,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:04,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786739056] [2024-06-14 14:05:04,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:04,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:04,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:04,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:04,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:04,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:04,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 294 transitions, 3951 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:04,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:04,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:04,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:05,991 INFO L124 PetriNetUnfolderBase]: 5918/8824 cut-off events. [2024-06-14 14:05:05,992 INFO L125 PetriNetUnfolderBase]: For 247227/247242 co-relation queries the response was YES. [2024-06-14 14:05:06,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64768 conditions, 8824 events. 5918/8824 cut-off events. For 247227/247242 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 51506 event pairs, 1727 based on Foata normal form. 11/8822 useless extension candidates. Maximal degree in co-relation 64692. Up to 7563 conditions per place. [2024-06-14 14:05:06,085 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 170 selfloop transitions, 150 changer transitions 0/328 dead transitions. [2024-06-14 14:05:06,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 328 transitions, 4873 flow [2024-06-14 14:05:06,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:06,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-14 14:05:06,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085714285714285 [2024-06-14 14:05:06,086 INFO L175 Difference]: Start difference. First operand has 163 places, 294 transitions, 3951 flow. Second operand 7 states and 213 transitions. [2024-06-14 14:05:06,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 328 transitions, 4873 flow [2024-06-14 14:05:06,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 328 transitions, 4539 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:06,649 INFO L231 Difference]: Finished difference. Result has 165 places, 294 transitions, 3927 flow [2024-06-14 14:05:06,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3927, PETRI_PLACES=165, PETRI_TRANSITIONS=294} [2024-06-14 14:05:06,650 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 112 predicate places. [2024-06-14 14:05:06,650 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 294 transitions, 3927 flow [2024-06-14 14:05:06,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:06,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:06,651 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 14:05:06,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:05:06,651 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 14:05:06,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:06,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1442194568, now seen corresponding path program 1 times [2024-06-14 14:05:06,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:06,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120511589] [2024-06-14 14:05:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:06,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:06,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:06,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120511589] [2024-06-14 14:05:06,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120511589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:06,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:06,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:06,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8015471] [2024-06-14 14:05:06,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:06,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:06,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:07,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:05:07,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 294 transitions, 3927 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:07,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:07,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:05:07,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:08,226 INFO L124 PetriNetUnfolderBase]: 6011/9004 cut-off events. [2024-06-14 14:05:08,227 INFO L125 PetriNetUnfolderBase]: For 281508/281538 co-relation queries the response was YES. [2024-06-14 14:05:08,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65642 conditions, 9004 events. 6011/9004 cut-off events. For 281508/281538 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 53481 event pairs, 1768 based on Foata normal form. 59/9022 useless extension candidates. Maximal degree in co-relation 65565. Up to 7530 conditions per place. [2024-06-14 14:05:08,336 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 236 selfloop transitions, 55 changer transitions 0/329 dead transitions. [2024-06-14 14:05:08,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 329 transitions, 4819 flow [2024-06-14 14:05:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-14 14:05:08,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914285714285714 [2024-06-14 14:05:08,352 INFO L175 Difference]: Start difference. First operand has 165 places, 294 transitions, 3927 flow. Second operand 7 states and 207 transitions. [2024-06-14 14:05:08,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 329 transitions, 4819 flow [2024-06-14 14:05:09,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 329 transitions, 4509 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:09,009 INFO L231 Difference]: Finished difference. Result has 166 places, 296 transitions, 3796 flow [2024-06-14 14:05:09,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3796, PETRI_PLACES=166, PETRI_TRANSITIONS=296} [2024-06-14 14:05:09,009 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 113 predicate places. [2024-06-14 14:05:09,009 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 296 transitions, 3796 flow [2024-06-14 14:05:09,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:09,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:09,010 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 14:05:09,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:05:09,010 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 14:05:09,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1455527048, now seen corresponding path program 2 times [2024-06-14 14:05:09,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:09,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129200152] [2024-06-14 14:05:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:09,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:09,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129200152] [2024-06-14 14:05:09,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129200152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:09,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:09,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:09,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130518115] [2024-06-14 14:05:09,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:09,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:09,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:09,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:09,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:09,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 14:05:09,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 296 transitions, 3796 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:09,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:09,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 14:05:09,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:10,550 INFO L124 PetriNetUnfolderBase]: 6412/9603 cut-off events. [2024-06-14 14:05:10,550 INFO L125 PetriNetUnfolderBase]: For 308965/308977 co-relation queries the response was YES. [2024-06-14 14:05:10,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69726 conditions, 9603 events. 6412/9603 cut-off events. For 308965/308977 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 57694 event pairs, 1793 based on Foata normal form. 56/9616 useless extension candidates. Maximal degree in co-relation 69648. Up to 7288 conditions per place. [2024-06-14 14:05:10,677 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 241 selfloop transitions, 60 changer transitions 0/339 dead transitions. [2024-06-14 14:05:10,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 339 transitions, 4830 flow [2024-06-14 14:05:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-14 14:05:10,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2024-06-14 14:05:10,679 INFO L175 Difference]: Start difference. First operand has 166 places, 296 transitions, 3796 flow. Second operand 7 states and 212 transitions. [2024-06-14 14:05:10,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 339 transitions, 4830 flow [2024-06-14 14:05:11,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 339 transitions, 4697 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:11,371 INFO L231 Difference]: Finished difference. Result has 168 places, 299 transitions, 3864 flow [2024-06-14 14:05:11,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3663, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3864, PETRI_PLACES=168, PETRI_TRANSITIONS=299} [2024-06-14 14:05:11,371 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 115 predicate places. [2024-06-14 14:05:11,372 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 299 transitions, 3864 flow [2024-06-14 14:05:11,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:11,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:11,372 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 14:05:11,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:05:11,372 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:11,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:11,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1170519957, now seen corresponding path program 1 times [2024-06-14 14:05:11,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:11,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286034027] [2024-06-14 14:05:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:11,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:11,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:11,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286034027] [2024-06-14 14:05:11,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286034027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:11,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:11,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203985122] [2024-06-14 14:05:11,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:11,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:11,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:11,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:11,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:05:11,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 299 transitions, 3864 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:11,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:11,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:05:11,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:12,787 INFO L124 PetriNetUnfolderBase]: 6164/9202 cut-off events. [2024-06-14 14:05:12,787 INFO L125 PetriNetUnfolderBase]: For 328827/329077 co-relation queries the response was YES. [2024-06-14 14:05:12,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69489 conditions, 9202 events. 6164/9202 cut-off events. For 328827/329077 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 55699 event pairs, 1784 based on Foata normal form. 9/9019 useless extension candidates. Maximal degree in co-relation 69410. Up to 7902 conditions per place. [2024-06-14 14:05:12,891 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 209 selfloop transitions, 60 changer transitions 0/325 dead transitions. [2024-06-14 14:05:12,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 325 transitions, 4684 flow [2024-06-14 14:05:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-14 14:05:12,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-14 14:05:12,892 INFO L175 Difference]: Start difference. First operand has 168 places, 299 transitions, 3864 flow. Second operand 6 states and 177 transitions. [2024-06-14 14:05:12,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 325 transitions, 4684 flow [2024-06-14 14:05:13,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 325 transitions, 4581 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:13,552 INFO L231 Difference]: Finished difference. Result has 171 places, 306 transitions, 3994 flow [2024-06-14 14:05:13,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3994, PETRI_PLACES=171, PETRI_TRANSITIONS=306} [2024-06-14 14:05:13,553 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 118 predicate places. [2024-06-14 14:05:13,553 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 306 transitions, 3994 flow [2024-06-14 14:05:13,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:13,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:13,553 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 14:05:13,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:05:13,554 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 14:05:13,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:13,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1007494462, now seen corresponding path program 1 times [2024-06-14 14:05:13,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:13,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882507694] [2024-06-14 14:05:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:13,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:13,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:13,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882507694] [2024-06-14 14:05:13,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882507694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:13,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:13,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:13,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207448360] [2024-06-14 14:05:13,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:13,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:13,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:13,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:13,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:13,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:13,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 306 transitions, 3994 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:13,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:13,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:13,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:15,521 INFO L124 PetriNetUnfolderBase]: 8539/12677 cut-off events. [2024-06-14 14:05:15,521 INFO L125 PetriNetUnfolderBase]: For 449127/449148 co-relation queries the response was YES. [2024-06-14 14:05:15,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94251 conditions, 12677 events. 8539/12677 cut-off events. For 449127/449148 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 77970 event pairs, 2244 based on Foata normal form. 86/12754 useless extension candidates. Maximal degree in co-relation 94170. Up to 9116 conditions per place. [2024-06-14 14:05:15,675 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 308 selfloop transitions, 83 changer transitions 0/399 dead transitions. [2024-06-14 14:05:15,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 399 transitions, 5808 flow [2024-06-14 14:05:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-06-14 14:05:15,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177777777777778 [2024-06-14 14:05:15,677 INFO L175 Difference]: Start difference. First operand has 171 places, 306 transitions, 3994 flow. Second operand 9 states and 278 transitions. [2024-06-14 14:05:15,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 399 transitions, 5808 flow [2024-06-14 14:05:16,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 399 transitions, 5652 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:16,573 INFO L231 Difference]: Finished difference. Result has 178 places, 321 transitions, 4348 flow [2024-06-14 14:05:16,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3842, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4348, PETRI_PLACES=178, PETRI_TRANSITIONS=321} [2024-06-14 14:05:16,574 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 125 predicate places. [2024-06-14 14:05:16,574 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 321 transitions, 4348 flow [2024-06-14 14:05:16,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:16,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:16,574 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 14:05:16,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:05:16,575 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 14:05:16,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:16,575 INFO L85 PathProgramCache]: Analyzing trace with hash -918928702, now seen corresponding path program 2 times [2024-06-14 14:05:16,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:16,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444498759] [2024-06-14 14:05:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:16,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:16,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444498759] [2024-06-14 14:05:16,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444498759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:16,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:16,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:16,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597229141] [2024-06-14 14:05:16,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:16,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:16,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:16,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:16,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:16,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:16,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 321 transitions, 4348 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:16,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:16,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:16,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:19,082 INFO L124 PetriNetUnfolderBase]: 9839/14585 cut-off events. [2024-06-14 14:05:19,082 INFO L125 PetriNetUnfolderBase]: For 581466/581487 co-relation queries the response was YES. [2024-06-14 14:05:19,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114688 conditions, 14585 events. 9839/14585 cut-off events. For 581466/581487 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 91940 event pairs, 2860 based on Foata normal form. 86/14662 useless extension candidates. Maximal degree in co-relation 114604. Up to 11857 conditions per place. [2024-06-14 14:05:19,235 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 307 selfloop transitions, 80 changer transitions 0/395 dead transitions. [2024-06-14 14:05:19,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 395 transitions, 5943 flow [2024-06-14 14:05:19,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 296 transitions. [2024-06-14 14:05:19,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592 [2024-06-14 14:05:19,236 INFO L175 Difference]: Start difference. First operand has 178 places, 321 transitions, 4348 flow. Second operand 10 states and 296 transitions. [2024-06-14 14:05:19,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 395 transitions, 5943 flow [2024-06-14 14:05:20,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 395 transitions, 5752 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:20,455 INFO L231 Difference]: Finished difference. Result has 185 places, 328 transitions, 4520 flow [2024-06-14 14:05:20,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4165, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4520, PETRI_PLACES=185, PETRI_TRANSITIONS=328} [2024-06-14 14:05:20,456 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 132 predicate places. [2024-06-14 14:05:20,456 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 328 transitions, 4520 flow [2024-06-14 14:05:20,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:20,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:20,456 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 14:05:20,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:05:20,456 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 14:05:20,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1005616792, now seen corresponding path program 3 times [2024-06-14 14:05:20,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:20,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681134065] [2024-06-14 14:05:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:20,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:20,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:20,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681134065] [2024-06-14 14:05:20,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681134065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:20,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:20,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:20,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633800935] [2024-06-14 14:05:20,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:20,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:20,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:20,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:20,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 328 transitions, 4520 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:20,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:20,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:20,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:22,751 INFO L124 PetriNetUnfolderBase]: 10109/14979 cut-off events. [2024-06-14 14:05:22,752 INFO L125 PetriNetUnfolderBase]: For 594990/595011 co-relation queries the response was YES. [2024-06-14 14:05:22,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115826 conditions, 14979 events. 10109/14979 cut-off events. For 594990/595011 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 94733 event pairs, 3119 based on Foata normal form. 98/15068 useless extension candidates. Maximal degree in co-relation 115739. Up to 13123 conditions per place. [2024-06-14 14:05:22,983 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 300 selfloop transitions, 77 changer transitions 0/385 dead transitions. [2024-06-14 14:05:22,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 385 transitions, 5777 flow [2024-06-14 14:05:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 286 transitions. [2024-06-14 14:05:22,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-06-14 14:05:22,985 INFO L175 Difference]: Start difference. First operand has 185 places, 328 transitions, 4520 flow. Second operand 10 states and 286 transitions. [2024-06-14 14:05:22,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 385 transitions, 5777 flow [2024-06-14 14:05:24,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 385 transitions, 5590 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:24,485 INFO L231 Difference]: Finished difference. Result has 189 places, 331 transitions, 4595 flow [2024-06-14 14:05:24,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4341, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4595, PETRI_PLACES=189, PETRI_TRANSITIONS=331} [2024-06-14 14:05:24,486 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-06-14 14:05:24,486 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 331 transitions, 4595 flow [2024-06-14 14:05:24,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:24,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:24,486 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 14:05:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:05:24,486 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 14:05:24,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash 794586155, now seen corresponding path program 1 times [2024-06-14 14:05:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:24,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516336814] [2024-06-14 14:05:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:24,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:25,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:25,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516336814] [2024-06-14 14:05:25,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516336814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:25,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:25,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:25,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085032802] [2024-06-14 14:05:25,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:25,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:25,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:25,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:25,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:25,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 331 transitions, 4595 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:25,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:25,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:25,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:27,651 INFO L124 PetriNetUnfolderBase]: 10119/15010 cut-off events. [2024-06-14 14:05:27,651 INFO L125 PetriNetUnfolderBase]: For 552098/552107 co-relation queries the response was YES. [2024-06-14 14:05:27,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115437 conditions, 15010 events. 10119/15010 cut-off events. For 552098/552107 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 95303 event pairs, 3153 based on Foata normal form. 9/15012 useless extension candidates. Maximal degree in co-relation 115348. Up to 13963 conditions per place. [2024-06-14 14:05:27,834 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 331 selfloop transitions, 32 changer transitions 0/371 dead transitions. [2024-06-14 14:05:27,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 371 transitions, 5828 flow [2024-06-14 14:05:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 14:05:27,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-14 14:05:27,835 INFO L175 Difference]: Start difference. First operand has 189 places, 331 transitions, 4595 flow. Second operand 7 states and 189 transitions. [2024-06-14 14:05:27,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 371 transitions, 5828 flow [2024-06-14 14:05:29,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 371 transitions, 5594 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:29,057 INFO L231 Difference]: Finished difference. Result has 189 places, 348 transitions, 4826 flow [2024-06-14 14:05:29,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4393, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4826, PETRI_PLACES=189, PETRI_TRANSITIONS=348} [2024-06-14 14:05:29,058 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-06-14 14:05:29,058 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 348 transitions, 4826 flow [2024-06-14 14:05:29,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:29,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:29,059 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 14:05:29,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:05:29,059 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 14:05:29,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:29,060 INFO L85 PathProgramCache]: Analyzing trace with hash 847087850, now seen corresponding path program 4 times [2024-06-14 14:05:29,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:29,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235102317] [2024-06-14 14:05:29,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:29,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:29,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:29,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235102317] [2024-06-14 14:05:29,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235102317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:29,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:29,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:29,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30855125] [2024-06-14 14:05:29,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:29,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:29,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:29,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:29,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:29,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:29,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 348 transitions, 4826 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:29,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:29,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:29,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:32,331 INFO L124 PetriNetUnfolderBase]: 11196/16559 cut-off events. [2024-06-14 14:05:32,331 INFO L125 PetriNetUnfolderBase]: For 731638/731653 co-relation queries the response was YES. [2024-06-14 14:05:32,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124163 conditions, 16559 events. 11196/16559 cut-off events. For 731638/731653 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 106360 event pairs, 3534 based on Foata normal form. 224/16770 useless extension candidates. Maximal degree in co-relation 124072. Up to 13895 conditions per place. [2024-06-14 14:05:32,499 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 298 selfloop transitions, 90 changer transitions 1/397 dead transitions. [2024-06-14 14:05:32,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 397 transitions, 5984 flow [2024-06-14 14:05:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2024-06-14 14:05:32,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-06-14 14:05:32,501 INFO L175 Difference]: Start difference. First operand has 189 places, 348 transitions, 4826 flow. Second operand 9 states and 267 transitions. [2024-06-14 14:05:32,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 397 transitions, 5984 flow [2024-06-14 14:05:33,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 397 transitions, 5896 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:33,762 INFO L231 Difference]: Finished difference. Result has 196 places, 350 transitions, 5018 flow [2024-06-14 14:05:33,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4738, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5018, PETRI_PLACES=196, PETRI_TRANSITIONS=350} [2024-06-14 14:05:33,763 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 143 predicate places. [2024-06-14 14:05:33,763 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 350 transitions, 5018 flow [2024-06-14 14:05:33,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:33,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:33,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:33,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:05:33,764 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 14:05:33,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:33,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1704651274, now seen corresponding path program 5 times [2024-06-14 14:05:33,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:33,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468015677] [2024-06-14 14:05:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:33,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:34,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:34,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468015677] [2024-06-14 14:05:34,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468015677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:34,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:34,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:34,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749845218] [2024-06-14 14:05:34,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:34,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:34,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:34,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:34,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:34,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:34,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 350 transitions, 5018 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:34,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:34,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:34,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:37,533 INFO L124 PetriNetUnfolderBase]: 12454/18409 cut-off events. [2024-06-14 14:05:37,533 INFO L125 PetriNetUnfolderBase]: For 816274/816289 co-relation queries the response was YES. [2024-06-14 14:05:37,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137745 conditions, 18409 events. 12454/18409 cut-off events. For 816274/816289 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 119985 event pairs, 4044 based on Foata normal form. 224/18620 useless extension candidates. Maximal degree in co-relation 137652. Up to 15417 conditions per place. [2024-06-14 14:05:37,770 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 298 selfloop transitions, 87 changer transitions 0/393 dead transitions. [2024-06-14 14:05:37,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 393 transitions, 6146 flow [2024-06-14 14:05:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-14 14:05:37,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 14:05:37,772 INFO L175 Difference]: Start difference. First operand has 196 places, 350 transitions, 5018 flow. Second operand 7 states and 217 transitions. [2024-06-14 14:05:37,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 393 transitions, 6146 flow [2024-06-14 14:05:39,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 393 transitions, 5913 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:39,626 INFO L231 Difference]: Finished difference. Result has 196 places, 353 transitions, 5077 flow [2024-06-14 14:05:39,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4785, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5077, PETRI_PLACES=196, PETRI_TRANSITIONS=353} [2024-06-14 14:05:39,627 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 143 predicate places. [2024-06-14 14:05:39,627 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 353 transitions, 5077 flow [2024-06-14 14:05:39,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:39,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:39,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:39,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:05:39,628 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 14:05:39,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:39,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1704647554, now seen corresponding path program 6 times [2024-06-14 14:05:39,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:39,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991564747] [2024-06-14 14:05:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:39,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:39,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:39,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991564747] [2024-06-14 14:05:39,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991564747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:39,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:39,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:39,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318124624] [2024-06-14 14:05:39,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:39,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:39,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:39,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:39,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 353 transitions, 5077 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:39,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:39,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:39,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:43,844 INFO L124 PetriNetUnfolderBase]: 14904/22199 cut-off events. [2024-06-14 14:05:43,845 INFO L125 PetriNetUnfolderBase]: For 971686/971701 co-relation queries the response was YES. [2024-06-14 14:05:44,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164356 conditions, 22199 events. 14904/22199 cut-off events. For 971686/971701 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 150672 event pairs, 4362 based on Foata normal form. 206/22392 useless extension candidates. Maximal degree in co-relation 164262. Up to 13456 conditions per place. [2024-06-14 14:05:44,318 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 312 selfloop transitions, 98 changer transitions 0/418 dead transitions. [2024-06-14 14:05:44,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 418 transitions, 6609 flow [2024-06-14 14:05:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-14 14:05:44,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485714285714286 [2024-06-14 14:05:44,325 INFO L175 Difference]: Start difference. First operand has 196 places, 353 transitions, 5077 flow. Second operand 7 states and 227 transitions. [2024-06-14 14:05:44,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 418 transitions, 6609 flow [2024-06-14 14:05:46,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 418 transitions, 6379 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:46,674 INFO L231 Difference]: Finished difference. Result has 199 places, 364 transitions, 5391 flow [2024-06-14 14:05:46,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4847, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5391, PETRI_PLACES=199, PETRI_TRANSITIONS=364} [2024-06-14 14:05:46,674 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 146 predicate places. [2024-06-14 14:05:46,674 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 364 transitions, 5391 flow [2024-06-14 14:05:46,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:46,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:46,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:05:46,675 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 14:05:46,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:46,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1455533000, now seen corresponding path program 1 times [2024-06-14 14:05:46,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:46,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611312010] [2024-06-14 14:05:46,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:46,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:46,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:46,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611312010] [2024-06-14 14:05:46,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611312010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:46,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:46,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:46,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154897609] [2024-06-14 14:05:46,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:46,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:46,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:46,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:46,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:46,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:46,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 364 transitions, 5391 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:46,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:46,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:50,891 INFO L124 PetriNetUnfolderBase]: 15948/23752 cut-off events. [2024-06-14 14:05:50,892 INFO L125 PetriNetUnfolderBase]: For 1034422/1034437 co-relation queries the response was YES. [2024-06-14 14:05:51,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173500 conditions, 23752 events. 15948/23752 cut-off events. For 1034422/1034437 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 162969 event pairs, 5008 based on Foata normal form. 206/23939 useless extension candidates. Maximal degree in co-relation 173404. Up to 17489 conditions per place. [2024-06-14 14:05:51,228 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 316 selfloop transitions, 99 changer transitions 1/424 dead transitions. [2024-06-14 14:05:51,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 424 transitions, 6721 flow [2024-06-14 14:05:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 272 transitions. [2024-06-14 14:05:51,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6044444444444445 [2024-06-14 14:05:51,233 INFO L175 Difference]: Start difference. First operand has 199 places, 364 transitions, 5391 flow. Second operand 9 states and 272 transitions. [2024-06-14 14:05:51,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 424 transitions, 6721 flow [2024-06-14 14:05:54,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 424 transitions, 6506 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:54,026 INFO L231 Difference]: Finished difference. Result has 206 places, 369 transitions, 5546 flow [2024-06-14 14:05:54,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5176, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5546, PETRI_PLACES=206, PETRI_TRANSITIONS=369} [2024-06-14 14:05:54,027 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 153 predicate places. [2024-06-14 14:05:54,028 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 369 transitions, 5546 flow [2024-06-14 14:05:54,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:54,028 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 14:05:54,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:05:54,028 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:05:54,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:54,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1154801655, now seen corresponding path program 2 times [2024-06-14 14:05:54,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:54,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238812781] [2024-06-14 14:05:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:54,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:54,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:54,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238812781] [2024-06-14 14:05:54,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238812781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:54,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:54,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:54,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706710604] [2024-06-14 14:05:54,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:54,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:54,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:54,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 14:05:54,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 369 transitions, 5546 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:54,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 14:05:54,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:58,421 INFO L124 PetriNetUnfolderBase]: 15894/23668 cut-off events. [2024-06-14 14:05:58,421 INFO L125 PetriNetUnfolderBase]: For 882230/882254 co-relation queries the response was YES. [2024-06-14 14:05:58,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171544 conditions, 23668 events. 15894/23668 cut-off events. For 882230/882254 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 162904 event pairs, 5899 based on Foata normal form. 18/23672 useless extension candidates. Maximal degree in co-relation 171445. Up to 22316 conditions per place. [2024-06-14 14:05:58,802 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 344 selfloop transitions, 31 changer transitions 0/383 dead transitions. [2024-06-14 14:05:58,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 383 transitions, 6360 flow [2024-06-14 14:05:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-14 14:05:58,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-14 14:05:58,804 INFO L175 Difference]: Start difference. First operand has 206 places, 369 transitions, 5546 flow. Second operand 5 states and 140 transitions. [2024-06-14 14:05:58,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 383 transitions, 6360 flow [2024-06-14 14:06:01,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 383 transitions, 6145 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:01,497 INFO L231 Difference]: Finished difference. Result has 206 places, 369 transitions, 5402 flow [2024-06-14 14:06:01,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5402, PETRI_PLACES=206, PETRI_TRANSITIONS=369} [2024-06-14 14:06:01,498 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 153 predicate places. [2024-06-14 14:06:01,498 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 369 transitions, 5402 flow [2024-06-14 14:06:01,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:01,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:01,498 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 14:06:01,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:06:01,499 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 14:06:01,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:01,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1154788759, now seen corresponding path program 1 times [2024-06-14 14:06:01,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:01,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937780465] [2024-06-14 14:06:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:01,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:01,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:01,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937780465] [2024-06-14 14:06:01,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937780465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:01,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:01,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:01,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539335358] [2024-06-14 14:06:01,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:01,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:01,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:01,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:01,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:01,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 14:06:01,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 369 transitions, 5402 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:01,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:01,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 14:06:01,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand