./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 bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/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-bcb38a6-m [2024-06-04 16:12:44,087 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:12:44,164 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:12:44,170 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:12:44,170 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:12:44,222 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:12:44,222 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:12:44,223 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:12:44,223 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:12:44,227 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:12:44,227 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:12:44,228 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:12:44,229 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:12:44,230 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:12:44,230 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:12:44,230 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:12:44,231 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:12:44,231 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:12:44,237 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:12:44,237 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:12:44,238 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:12:44,239 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:12:44,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:12:44,239 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:12:44,240 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:12:44,240 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:12:44,240 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:12:44,240 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:12:44,241 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:12:44,241 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:12:44,242 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:12:44,242 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:12:44,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:12:44,243 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:12:44,243 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:12:44,243 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:12:44,244 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:12:44,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:12:44,244 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:12:44,244 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:12:44,245 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:12:44,245 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:12:44,245 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:12:44,245 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:12:44,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:12:44,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:12:44,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:12:44,552 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:12:44,552 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:12:44,553 INFO L431 ainManager$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 [2024-06-04 16:12:44,688 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:12:44,688 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:12:44,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:12:46,013 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:12:46,256 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:12:46,268 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:12:46,288 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4762d2816/2a8b0121d79042329f9f85d2169bcc5b/FLAGab4fb18cc [2024-06-04 16:12:46,298 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4762d2816/2a8b0121d79042329f9f85d2169bcc5b [2024-06-04 16:12:46,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:12:46,299 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:12:46,300 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:12:46,300 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:12:46,305 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:12:46,305 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:12:44" (1/2) ... [2024-06-04 16:12:46,306 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d8110e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:12:46, skipping insertion in model container [2024-06-04 16:12:46,306 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:12:44" (1/2) ... [2024-06-04 16:12:46,308 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ae15495 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:12:46, skipping insertion in model container [2024-06-04 16:12:46,308 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:12:46" (2/2) ... [2024-06-04 16:12:46,308 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d8110e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46, skipping insertion in model container [2024-06-04 16:12:46,308 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:12:46" (2/2) ... [2024-06-04 16:12:46,309 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:12:46,367 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:12:46,369 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))) [2024-06-04 16:12:46,369 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))) [2024-06-04 16:12:46,369 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))) [2024-06-04 16:12:46,369 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))) [2024-06-04 16:12:46,370 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:12:46,371 INFO L106 edCorrectnessWitness]: ghost_update [L789-L789] multithreaded = 1; [2024-06-04 16:12:46,416 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:12:46,794 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:12:46,803 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:12:46,930 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:12:46,974 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:12:46,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46 WrapperNode [2024-06-04 16:12:46,975 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:12:46,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:12:46,977 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:12:46,977 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:12:46,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,018 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,056 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2024-06-04 16:12:47,057 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:12:47,058 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:12:47,058 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:12:47,058 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:12:47,068 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,073 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,088 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 16:12:47,088 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,089 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,098 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,110 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,112 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,115 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:12:47,116 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:12:47,116 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:12:47,116 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:12:47,117 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (1/1) ... [2024-06-04 16:12:47,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:12:47,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:12:47,157 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 16:12:47,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 16:12:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:12:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:12:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:12:47,207 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:12:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:12:47,207 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:12:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:12:47,207 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:12:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 16:12:47,208 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 16:12:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:12:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:12:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:12:47,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:12:47,210 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:12:47,345 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:12:47,347 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:12:47,717 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:12:47,717 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:12:47,817 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:12:47,818 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:12:47,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:12:47 BoogieIcfgContainer [2024-06-04 16:12:47,818 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:12:47,820 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:12:47,820 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:12:47,823 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:12:47,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:12:44" (1/4) ... [2024-06-04 16:12:47,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb04e26 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:12:47, skipping insertion in model container [2024-06-04 16:12:47,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:12:46" (2/4) ... [2024-06-04 16:12:47,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb04e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:12:47, skipping insertion in model container [2024-06-04 16:12:47,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:12:46" (3/4) ... [2024-06-04 16:12:47,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb04e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:12:47, skipping insertion in model container [2024-06-04 16:12:47,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:12:47" (4/4) ... [2024-06-04 16:12:47,826 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:12:47,842 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:12:47,842 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 16:12:47,842 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:12:47,888 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:12:47,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 50 transitions, 116 flow [2024-06-04 16:12:47,948 INFO L124 PetriNetUnfolderBase]: 0/46 cut-off events. [2024-06-04 16:12:47,949 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:12:47,951 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. [2024-06-04 16:12:47,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 50 transitions, 116 flow [2024-06-04 16:12:47,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 40 transitions, 92 flow [2024-06-04 16:12:47,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:12:47,977 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;@2f0c46b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:12:47,977 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 16:12:47,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:12:47,981 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-04 16:12:47,981 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:12:47,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:47,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:12:47,982 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)] === [2024-06-04 16:12:47,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:47,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1396109065, now seen corresponding path program 1 times [2024-06-04 16:12:47,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:47,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045280759] [2024-06-04 16:12:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:47,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:48,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:48,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045280759] [2024-06-04 16:12:48,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045280759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:48,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:48,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:12:48,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427048071] [2024-06-04 16:12:48,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:48,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:12:48,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:48,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:12:48,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:12:48,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-06-04 16:12:48,819 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) [2024-06-04 16:12:48,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:48,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-06-04 16:12:48,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:49,270 INFO L124 PetriNetUnfolderBase]: 1971/2943 cut-off events. [2024-06-04 16:12:49,271 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-06-04 16:12:49,281 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. [2024-06-04 16:12:49,299 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 38 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-06-04 16:12:49,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 215 flow [2024-06-04 16:12:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:12:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:12:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-04 16:12:49,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2024-06-04 16:12:49,312 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 92 flow. Second operand 3 states and 104 transitions. [2024-06-04 16:12:49,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 215 flow [2024-06-04 16:12:49,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:12:49,322 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 127 flow [2024-06-04 16:12:49,324 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} [2024-06-04 16:12:49,327 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-04 16:12:49,327 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 127 flow [2024-06-04 16:12:49,328 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) [2024-06-04 16:12:49,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:49,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:49,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:12:49,329 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)] === [2024-06-04 16:12:49,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash 74239535, now seen corresponding path program 1 times [2024-06-04 16:12:49,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:49,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757278868] [2024-06-04 16:12:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:49,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:49,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757278868] [2024-06-04 16:12:49,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757278868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:49,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:49,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:12:49,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176916288] [2024-06-04 16:12:49,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:49,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:12:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:12:49,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:12:49,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:12:49,756 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) [2024-06-04 16:12:49,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:49,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:12:49,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:50,285 INFO L124 PetriNetUnfolderBase]: 3439/5046 cut-off events. [2024-06-04 16:12:50,286 INFO L125 PetriNetUnfolderBase]: For 938/956 co-relation queries the response was YES. [2024-06-04 16:12:50,295 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. [2024-06-04 16:12:50,321 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 49 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-04 16:12:50,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 299 flow [2024-06-04 16:12:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:12:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:12:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-04 16:12:50,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-04 16:12:50,324 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 127 flow. Second operand 4 states and 129 transitions. [2024-06-04 16:12:50,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 299 flow [2024-06-04 16:12:50,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:12:50,326 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 162 flow [2024-06-04 16:12:50,327 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} [2024-06-04 16:12:50,327 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-06-04 16:12:50,328 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 162 flow [2024-06-04 16:12:50,328 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) [2024-06-04 16:12:50,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:50,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:50,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:12:50,329 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)] === [2024-06-04 16:12:50,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:50,334 INFO L85 PathProgramCache]: Analyzing trace with hash -331451323, now seen corresponding path program 1 times [2024-06-04 16:12:50,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:50,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313237974] [2024-06-04 16:12:50,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:50,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:50,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:50,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313237974] [2024-06-04 16:12:50,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313237974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:50,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:50,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:12:50,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902873274] [2024-06-04 16:12:50,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:50,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:12:50,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:50,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:12:50,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:12:50,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:12:50,773 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) [2024-06-04 16:12:50,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:50,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:12:50,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:51,261 INFO L124 PetriNetUnfolderBase]: 3382/5002 cut-off events. [2024-06-04 16:12:51,262 INFO L125 PetriNetUnfolderBase]: For 2387/2387 co-relation queries the response was YES. [2024-06-04 16:12:51,273 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. [2024-06-04 16:12:51,351 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-04 16:12:51,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 358 flow [2024-06-04 16:12:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:12:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:12:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-04 16:12:51,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-04 16:12:51,357 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 162 flow. Second operand 4 states and 126 transitions. [2024-06-04 16:12:51,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 358 flow [2024-06-04 16:12:51,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 336 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 16:12:51,363 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 214 flow [2024-06-04 16:12:51,363 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} [2024-06-04 16:12:51,364 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-06-04 16:12:51,364 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 214 flow [2024-06-04 16:12:51,364 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) [2024-06-04 16:12:51,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:51,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:51,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:12:51,365 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)] === [2024-06-04 16:12:51,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:51,365 INFO L85 PathProgramCache]: Analyzing trace with hash -697114588, now seen corresponding path program 1 times [2024-06-04 16:12:51,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:51,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237570628] [2024-06-04 16:12:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:51,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:51,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:51,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237570628] [2024-06-04 16:12:51,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237570628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:51,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:51,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:12:51,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261717663] [2024-06-04 16:12:51,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:51,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:12:51,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:51,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:12:51,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:12:51,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:12:51,766 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) [2024-06-04 16:12:51,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:51,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:12:51,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:52,383 INFO L124 PetriNetUnfolderBase]: 3367/4973 cut-off events. [2024-06-04 16:12:52,383 INFO L125 PetriNetUnfolderBase]: For 4260/4260 co-relation queries the response was YES. [2024-06-04 16:12:52,394 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. [2024-06-04 16:12:52,423 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 61 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-04 16:12:52,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 440 flow [2024-06-04 16:12:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:12:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:12:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-04 16:12:52,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-04 16:12:52,426 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 214 flow. Second operand 5 states and 154 transitions. [2024-06-04 16:12:52,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 440 flow [2024-06-04 16:12:52,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 436 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:12:52,434 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 266 flow [2024-06-04 16:12:52,434 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} [2024-06-04 16:12:52,436 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-04 16:12:52,436 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 266 flow [2024-06-04 16:12:52,436 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) [2024-06-04 16:12:52,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:52,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:52,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:12:52,437 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)] === [2024-06-04 16:12:52,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:52,437 INFO L85 PathProgramCache]: Analyzing trace with hash -185775736, now seen corresponding path program 1 times [2024-06-04 16:12:52,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:52,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503475147] [2024-06-04 16:12:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:52,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:52,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:52,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503475147] [2024-06-04 16:12:52,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503475147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:52,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:52,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:12:52,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86537425] [2024-06-04 16:12:52,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:52,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:12:52,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:52,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:12:52,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:12:53,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:12:53,004 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) [2024-06-04 16:12:53,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:53,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:12:53,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:53,722 INFO L124 PetriNetUnfolderBase]: 4344/6383 cut-off events. [2024-06-04 16:12:53,723 INFO L125 PetriNetUnfolderBase]: For 8370/8382 co-relation queries the response was YES. [2024-06-04 16:12:53,739 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. [2024-06-04 16:12:53,769 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 59 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-04 16:12:53,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 514 flow [2024-06-04 16:12:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:12:53,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:12:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-04 16:12:53,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-04 16:12:53,773 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 266 flow. Second operand 4 states and 129 transitions. [2024-06-04 16:12:53,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 514 flow [2024-06-04 16:12:53,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 484 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 16:12:53,783 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 336 flow [2024-06-04 16:12:53,784 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} [2024-06-04 16:12:53,790 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-06-04 16:12:53,790 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 336 flow [2024-06-04 16:12:53,791 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) [2024-06-04 16:12:53,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:53,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:53,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:12:53,791 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)] === [2024-06-04 16:12:53,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash -174037276, now seen corresponding path program 2 times [2024-06-04 16:12:53,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:53,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896236486] [2024-06-04 16:12:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:53,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:54,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:54,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896236486] [2024-06-04 16:12:54,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896236486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:54,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:54,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:12:54,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373695135] [2024-06-04 16:12:54,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:54,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:12:54,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:54,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:12:54,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:12:54,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:12:54,216 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) [2024-06-04 16:12:54,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:54,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:12:54,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:54,871 INFO L124 PetriNetUnfolderBase]: 4335/6390 cut-off events. [2024-06-04 16:12:54,871 INFO L125 PetriNetUnfolderBase]: For 12420/12423 co-relation queries the response was YES. [2024-06-04 16:12:54,886 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. [2024-06-04 16:12:54,913 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 72 selfloop transitions, 20 changer transitions 0/100 dead transitions. [2024-06-04 16:12:54,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 100 transitions, 678 flow [2024-06-04 16:12:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:12:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:12:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-04 16:12:54,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-04 16:12:54,915 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 336 flow. Second operand 5 states and 154 transitions. [2024-06-04 16:12:54,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 100 transitions, 678 flow [2024-06-04 16:12:54,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 610 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-04 16:12:54,934 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 449 flow [2024-06-04 16:12:54,935 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} [2024-06-04 16:12:54,937 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-06-04 16:12:54,937 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 449 flow [2024-06-04 16:12:54,937 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) [2024-06-04 16:12:54,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:54,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:54,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:12:54,938 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)] === [2024-06-04 16:12:54,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:54,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1597410852, now seen corresponding path program 1 times [2024-06-04 16:12:54,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:54,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024225038] [2024-06-04 16:12:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:54,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:55,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:55,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024225038] [2024-06-04 16:12:55,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024225038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:55,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:55,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:12:55,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174733663] [2024-06-04 16:12:55,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:55,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:12:55,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:12:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:12:55,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:12:55,428 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) [2024-06-04 16:12:55,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:55,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:12:55,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:56,155 INFO L124 PetriNetUnfolderBase]: 4262/6356 cut-off events. [2024-06-04 16:12:56,155 INFO L125 PetriNetUnfolderBase]: For 13252/13261 co-relation queries the response was YES. [2024-06-04 16:12:56,176 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. [2024-06-04 16:12:56,206 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 69 selfloop transitions, 22 changer transitions 0/104 dead transitions. [2024-06-04 16:12:56,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 753 flow [2024-06-04 16:12:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:12:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:12:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-04 16:12:56,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608 [2024-06-04 16:12:56,208 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 449 flow. Second operand 5 states and 152 transitions. [2024-06-04 16:12:56,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 753 flow [2024-06-04 16:12:56,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 104 transitions, 721 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-04 16:12:56,222 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 559 flow [2024-06-04 16:12:56,222 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} [2024-06-04 16:12:56,223 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 21 predicate places. [2024-06-04 16:12:56,223 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 559 flow [2024-06-04 16:12:56,224 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) [2024-06-04 16:12:56,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:56,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:56,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:12:56,224 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)] === [2024-06-04 16:12:56,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1855309127, now seen corresponding path program 1 times [2024-06-04 16:12:56,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:56,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884681628] [2024-06-04 16:12:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:56,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:56,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:56,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884681628] [2024-06-04 16:12:56,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884681628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:56,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:56,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:12:56,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325979287] [2024-06-04 16:12:56,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:56,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:12:56,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:56,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:12:56,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:12:56,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:12:56,628 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) [2024-06-04 16:12:56,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:56,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:12:56,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:57,493 INFO L124 PetriNetUnfolderBase]: 5048/7453 cut-off events. [2024-06-04 16:12:57,496 INFO L125 PetriNetUnfolderBase]: For 25439/25460 co-relation queries the response was YES. [2024-06-04 16:12:57,522 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. [2024-06-04 16:12:57,561 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 97 selfloop transitions, 36 changer transitions 0/141 dead transitions. [2024-06-04 16:12:57,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 141 transitions, 1089 flow [2024-06-04 16:12:57,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:12:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:12:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-04 16:12:57,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466666666666666 [2024-06-04 16:12:57,565 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 559 flow. Second operand 6 states and 194 transitions. [2024-06-04 16:12:57,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 141 transitions, 1089 flow [2024-06-04 16:12:57,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 141 transitions, 1065 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-04 16:12:57,595 INFO L231 Difference]: Finished difference. Result has 80 places, 96 transitions, 736 flow [2024-06-04 16:12:57,595 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} [2024-06-04 16:12:57,596 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 27 predicate places. [2024-06-04 16:12:57,597 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 96 transitions, 736 flow [2024-06-04 16:12:57,597 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) [2024-06-04 16:12:57,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:57,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:57,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:12:57,598 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)] === [2024-06-04 16:12:57,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:57,598 INFO L85 PathProgramCache]: Analyzing trace with hash 998102265, now seen corresponding path program 2 times [2024-06-04 16:12:57,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:57,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391464727] [2024-06-04 16:12:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:57,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:57,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:57,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391464727] [2024-06-04 16:12:57,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391464727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:57,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:57,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:12:57,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272242678] [2024-06-04 16:12:57,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:57,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:12:57,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:12:57,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:12:58,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:12:58,003 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) [2024-06-04 16:12:58,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:58,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:12:58,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:58,905 INFO L124 PetriNetUnfolderBase]: 4926/7275 cut-off events. [2024-06-04 16:12:58,906 INFO L125 PetriNetUnfolderBase]: For 32214/32235 co-relation queries the response was YES. [2024-06-04 16:12:58,928 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. [2024-06-04 16:12:58,966 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 91 selfloop transitions, 30 changer transitions 0/129 dead transitions. [2024-06-04 16:12:58,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 1101 flow [2024-06-04 16:12:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:12:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:12:58,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-04 16:12:58,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644 [2024-06-04 16:12:58,968 INFO L175 Difference]: Start difference. First operand has 80 places, 96 transitions, 736 flow. Second operand 5 states and 161 transitions. [2024-06-04 16:12:58,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 1101 flow [2024-06-04 16:12:59,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 1045 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-04 16:12:59,009 INFO L231 Difference]: Finished difference. Result has 83 places, 97 transitions, 773 flow [2024-06-04 16:12:59,009 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} [2024-06-04 16:12:59,010 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-06-04 16:12:59,011 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 97 transitions, 773 flow [2024-06-04 16:12:59,011 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) [2024-06-04 16:12:59,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:59,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:59,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:12:59,014 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)] === [2024-06-04 16:12:59,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:59,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1973457257, now seen corresponding path program 3 times [2024-06-04 16:12:59,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:59,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606368196] [2024-06-04 16:12:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:59,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:59,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:59,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606368196] [2024-06-04 16:12:59,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606368196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:59,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:59,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:12:59,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921774298] [2024-06-04 16:12:59,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:59,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:12:59,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:59,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:12:59,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:12:59,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:12:59,411 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) [2024-06-04 16:12:59,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:59,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:12:59,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:00,261 INFO L124 PetriNetUnfolderBase]: 5003/7391 cut-off events. [2024-06-04 16:13:00,261 INFO L125 PetriNetUnfolderBase]: For 35050/35053 co-relation queries the response was YES. [2024-06-04 16:13:00,287 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. [2024-06-04 16:13:00,321 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 106 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-06-04 16:13:00,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 136 transitions, 1169 flow [2024-06-04 16:13:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-04 16:13:00,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-04 16:13:00,323 INFO L175 Difference]: Start difference. First operand has 83 places, 97 transitions, 773 flow. Second operand 6 states and 183 transitions. [2024-06-04 16:13:00,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 136 transitions, 1169 flow [2024-06-04 16:13:00,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 136 transitions, 1117 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:00,380 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 807 flow [2024-06-04 16:13:00,381 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} [2024-06-04 16:13:00,382 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 33 predicate places. [2024-06-04 16:13:00,382 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 807 flow [2024-06-04 16:13:00,383 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) [2024-06-04 16:13:00,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:00,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:00,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:13:00,383 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)] === [2024-06-04 16:13:00,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash 254108709, now seen corresponding path program 1 times [2024-06-04 16:13:00,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:00,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005760112] [2024-06-04 16:13:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:00,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:00,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:00,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005760112] [2024-06-04 16:13:00,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005760112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:00,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:00,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:00,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477481489] [2024-06-04 16:13:00,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:00,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:00,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:00,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:00,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:00,761 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) [2024-06-04 16:13:00,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:00,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:00,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:01,517 INFO L124 PetriNetUnfolderBase]: 4964/7334 cut-off events. [2024-06-04 16:13:01,518 INFO L125 PetriNetUnfolderBase]: For 39370/39373 co-relation queries the response was YES. [2024-06-04 16:13:01,541 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. [2024-06-04 16:13:01,577 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 106 selfloop transitions, 28 changer transitions 0/142 dead transitions. [2024-06-04 16:13:01,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 142 transitions, 1238 flow [2024-06-04 16:13:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:01,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:01,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-04 16:13:01,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-04 16:13:01,579 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 807 flow. Second operand 6 states and 185 transitions. [2024-06-04 16:13:01,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 142 transitions, 1238 flow [2024-06-04 16:13:01,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 142 transitions, 1182 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:01,630 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 863 flow [2024-06-04 16:13:01,630 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} [2024-06-04 16:13:01,630 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 35 predicate places. [2024-06-04 16:13:01,631 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 863 flow [2024-06-04 16:13:01,631 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) [2024-06-04 16:13:01,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:01,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:01,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:13:01,631 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)] === [2024-06-04 16:13:01,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:01,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1189371272, now seen corresponding path program 1 times [2024-06-04 16:13:01,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:01,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437284240] [2024-06-04 16:13:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:01,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:01,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:01,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437284240] [2024-06-04 16:13:01,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437284240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:01,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:01,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:13:01,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414491848] [2024-06-04 16:13:01,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:01,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:13:01,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:01,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:13:01,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:13:01,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:13:01,992 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) [2024-06-04 16:13:01,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:01,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:13:01,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:02,629 INFO L124 PetriNetUnfolderBase]: 4564/6784 cut-off events. [2024-06-04 16:13:02,630 INFO L125 PetriNetUnfolderBase]: For 45681/45713 co-relation queries the response was YES. [2024-06-04 16:13:02,656 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. [2024-06-04 16:13:02,690 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 102 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2024-06-04 16:13:02,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 133 transitions, 1266 flow [2024-06-04 16:13:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-04 16:13:02,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-04 16:13:02,697 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 863 flow. Second operand 5 states and 151 transitions. [2024-06-04 16:13:02,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 133 transitions, 1266 flow [2024-06-04 16:13:02,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 1205 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:02,768 INFO L231 Difference]: Finished difference. Result has 92 places, 112 transitions, 994 flow [2024-06-04 16:13:02,768 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} [2024-06-04 16:13:02,769 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-06-04 16:13:02,769 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 112 transitions, 994 flow [2024-06-04 16:13:02,769 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) [2024-06-04 16:13:02,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:02,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:02,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:13:02,770 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)] === [2024-06-04 16:13:02,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:02,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1116191325, now seen corresponding path program 1 times [2024-06-04 16:13:02,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:02,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395386266] [2024-06-04 16:13:02,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:02,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:03,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:03,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395386266] [2024-06-04 16:13:03,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395386266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:03,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:03,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040823537] [2024-06-04 16:13:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:03,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:03,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:03,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:13:03,202 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) [2024-06-04 16:13:03,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:03,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:13:03,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:03,984 INFO L124 PetriNetUnfolderBase]: 4770/7121 cut-off events. [2024-06-04 16:13:03,984 INFO L125 PetriNetUnfolderBase]: For 47776/47794 co-relation queries the response was YES. [2024-06-04 16:13:04,003 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. [2024-06-04 16:13:04,033 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 95 selfloop transitions, 38 changer transitions 0/149 dead transitions. [2024-06-04 16:13:04,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 149 transitions, 1492 flow [2024-06-04 16:13:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-04 16:13:04,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-06-04 16:13:04,036 INFO L175 Difference]: Start difference. First operand has 92 places, 112 transitions, 994 flow. Second operand 6 states and 178 transitions. [2024-06-04 16:13:04,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 149 transitions, 1492 flow [2024-06-04 16:13:04,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1450 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-04 16:13:04,114 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 1180 flow [2024-06-04 16:13:04,115 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} [2024-06-04 16:13:04,115 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 46 predicate places. [2024-06-04 16:13:04,115 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 1180 flow [2024-06-04 16:13:04,115 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) [2024-06-04 16:13:04,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:04,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:04,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:13:04,116 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)] === [2024-06-04 16:13:04,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:04,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1094420563, now seen corresponding path program 1 times [2024-06-04 16:13:04,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:04,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444132996] [2024-06-04 16:13:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:04,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:04,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:04,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444132996] [2024-06-04 16:13:04,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444132996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:04,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:04,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:04,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717509654] [2024-06-04 16:13:04,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:04,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:04,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:04,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:04,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:04,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:04,507 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) [2024-06-04 16:13:04,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:04,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:04,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:05,374 INFO L124 PetriNetUnfolderBase]: 5130/7653 cut-off events. [2024-06-04 16:13:05,374 INFO L125 PetriNetUnfolderBase]: For 63055/63082 co-relation queries the response was YES. [2024-06-04 16:13:05,398 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. [2024-06-04 16:13:05,431 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 142 selfloop transitions, 47 changer transitions 0/197 dead transitions. [2024-06-04 16:13:05,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 197 transitions, 2081 flow [2024-06-04 16:13:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 259 transitions. [2024-06-04 16:13:05,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755555555555556 [2024-06-04 16:13:05,434 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 1180 flow. Second operand 9 states and 259 transitions. [2024-06-04 16:13:05,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 197 transitions, 2081 flow [2024-06-04 16:13:05,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 197 transitions, 2016 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-04 16:13:05,547 INFO L231 Difference]: Finished difference. Result has 110 places, 151 transitions, 1516 flow [2024-06-04 16:13:05,547 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} [2024-06-04 16:13:05,547 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 57 predicate places. [2024-06-04 16:13:05,548 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 151 transitions, 1516 flow [2024-06-04 16:13:05,548 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) [2024-06-04 16:13:05,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:05,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:05,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:13:05,549 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)] === [2024-06-04 16:13:05,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1116017973, now seen corresponding path program 2 times [2024-06-04 16:13:05,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:05,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369815753] [2024-06-04 16:13:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:05,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:05,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:05,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369815753] [2024-06-04 16:13:05,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369815753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:05,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:05,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:05,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063317519] [2024-06-04 16:13:05,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:05,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:05,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:05,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:05,999 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) [2024-06-04 16:13:05,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:05,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:06,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:07,024 INFO L124 PetriNetUnfolderBase]: 5358/7986 cut-off events. [2024-06-04 16:13:07,024 INFO L125 PetriNetUnfolderBase]: For 79272/79293 co-relation queries the response was YES. [2024-06-04 16:13:07,056 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. [2024-06-04 16:13:07,087 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 140 selfloop transitions, 64 changer transitions 0/212 dead transitions. [2024-06-04 16:13:07,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 212 transitions, 2500 flow [2024-06-04 16:13:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-04 16:13:07,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-04 16:13:07,089 INFO L175 Difference]: Start difference. First operand has 110 places, 151 transitions, 1516 flow. Second operand 6 states and 188 transitions. [2024-06-04 16:13:07,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 212 transitions, 2500 flow [2024-06-04 16:13:07,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 212 transitions, 2336 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:07,232 INFO L231 Difference]: Finished difference. Result has 113 places, 179 transitions, 1915 flow [2024-06-04 16:13:07,233 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} [2024-06-04 16:13:07,233 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 60 predicate places. [2024-06-04 16:13:07,233 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 179 transitions, 1915 flow [2024-06-04 16:13:07,233 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) [2024-06-04 16:13:07,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:07,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:07,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:13:07,234 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)] === [2024-06-04 16:13:07,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1115810583, now seen corresponding path program 3 times [2024-06-04 16:13:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:07,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470622125] [2024-06-04 16:13:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:07,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470622125] [2024-06-04 16:13:07,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470622125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:07,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:07,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:07,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199901941] [2024-06-04 16:13:07,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:07,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:07,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:07,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:07,695 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) [2024-06-04 16:13:07,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:07,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:07,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:08,677 INFO L124 PetriNetUnfolderBase]: 5367/8006 cut-off events. [2024-06-04 16:13:08,677 INFO L125 PetriNetUnfolderBase]: For 93345/93366 co-relation queries the response was YES. [2024-06-04 16:13:08,700 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. [2024-06-04 16:13:08,728 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 142 selfloop transitions, 76 changer transitions 0/226 dead transitions. [2024-06-04 16:13:08,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 226 transitions, 2684 flow [2024-06-04 16:13:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-04 16:13:08,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-04 16:13:08,730 INFO L175 Difference]: Start difference. First operand has 113 places, 179 transitions, 1915 flow. Second operand 8 states and 237 transitions. [2024-06-04 16:13:08,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 226 transitions, 2684 flow [2024-06-04 16:13:08,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 226 transitions, 2567 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-04 16:13:08,866 INFO L231 Difference]: Finished difference. Result has 119 places, 189 transitions, 2094 flow [2024-06-04 16:13:08,866 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} [2024-06-04 16:13:08,867 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 66 predicate places. [2024-06-04 16:13:08,867 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 189 transitions, 2094 flow [2024-06-04 16:13:08,867 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) [2024-06-04 16:13:08,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:08,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:08,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:13:08,868 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)] === [2024-06-04 16:13:08,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:08,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1115802647, now seen corresponding path program 1 times [2024-06-04 16:13:08,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:08,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530723937] [2024-06-04 16:13:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:08,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:09,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530723937] [2024-06-04 16:13:09,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530723937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:09,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:09,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:09,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63304164] [2024-06-04 16:13:09,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:09,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:09,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:09,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:09,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:09,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:13:09,316 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) [2024-06-04 16:13:09,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:09,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:13:09,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:10,234 INFO L124 PetriNetUnfolderBase]: 5583/8355 cut-off events. [2024-06-04 16:13:10,235 INFO L125 PetriNetUnfolderBase]: For 110088/110132 co-relation queries the response was YES. [2024-06-04 16:13:10,263 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. [2024-06-04 16:13:10,297 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 161 selfloop transitions, 34 changer transitions 0/220 dead transitions. [2024-06-04 16:13:10,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 220 transitions, 2684 flow [2024-06-04 16:13:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:10,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-04 16:13:10,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-04 16:13:10,299 INFO L175 Difference]: Start difference. First operand has 119 places, 189 transitions, 2094 flow. Second operand 6 states and 181 transitions. [2024-06-04 16:13:10,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 220 transitions, 2684 flow [2024-06-04 16:13:10,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 220 transitions, 2484 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:10,411 INFO L231 Difference]: Finished difference. Result has 119 places, 192 transitions, 2032 flow [2024-06-04 16:13:10,411 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} [2024-06-04 16:13:10,412 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 66 predicate places. [2024-06-04 16:13:10,412 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 192 transitions, 2032 flow [2024-06-04 16:13:10,412 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) [2024-06-04 16:13:10,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:10,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:10,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:13:10,413 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)] === [2024-06-04 16:13:10,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:10,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1904061804, now seen corresponding path program 1 times [2024-06-04 16:13:10,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:10,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828449714] [2024-06-04 16:13:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:10,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:10,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:10,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828449714] [2024-06-04 16:13:10,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828449714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:10,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:10,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:13:10,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286034422] [2024-06-04 16:13:10,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:10,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:13:10,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:10,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:13:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:13:10,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:13:10,824 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) [2024-06-04 16:13:10,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:10,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:13:10,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:11,729 INFO L124 PetriNetUnfolderBase]: 5187/7758 cut-off events. [2024-06-04 16:13:11,729 INFO L125 PetriNetUnfolderBase]: For 117840/118080 co-relation queries the response was YES. [2024-06-04 16:13:11,758 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. [2024-06-04 16:13:11,797 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 136 selfloop transitions, 31 changer transitions 0/208 dead transitions. [2024-06-04 16:13:11,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 208 transitions, 2420 flow [2024-06-04 16:13:11,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-04 16:13:11,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-04 16:13:11,799 INFO L175 Difference]: Start difference. First operand has 119 places, 192 transitions, 2032 flow. Second operand 5 states and 151 transitions. [2024-06-04 16:13:11,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 208 transitions, 2420 flow [2024-06-04 16:13:12,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 208 transitions, 2310 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:12,039 INFO L231 Difference]: Finished difference. Result has 120 places, 192 transitions, 2000 flow [2024-06-04 16:13:12,039 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} [2024-06-04 16:13:12,040 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 67 predicate places. [2024-06-04 16:13:12,040 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 192 transitions, 2000 flow [2024-06-04 16:13:12,041 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) [2024-06-04 16:13:12,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:12,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:12,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:13:12,041 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)] === [2024-06-04 16:13:12,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash 521689447, now seen corresponding path program 1 times [2024-06-04 16:13:12,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:12,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499118987] [2024-06-04 16:13:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:12,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:12,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:12,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499118987] [2024-06-04 16:13:12,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499118987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:12,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:12,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:13:12,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73285056] [2024-06-04 16:13:12,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:12,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:13:12,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:12,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:13:12,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:13:12,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:13:12,491 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) [2024-06-04 16:13:12,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:12,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:13:12,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:13,592 INFO L124 PetriNetUnfolderBase]: 5465/8076 cut-off events. [2024-06-04 16:13:13,592 INFO L125 PetriNetUnfolderBase]: For 122641/123013 co-relation queries the response was YES. [2024-06-04 16:13:13,640 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. [2024-06-04 16:13:13,686 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 178 selfloop transitions, 36 changer transitions 0/232 dead transitions. [2024-06-04 16:13:13,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 232 transitions, 2734 flow [2024-06-04 16:13:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-04 16:13:13,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2024-06-04 16:13:13,688 INFO L175 Difference]: Start difference. First operand has 120 places, 192 transitions, 2000 flow. Second operand 6 states and 182 transitions. [2024-06-04 16:13:13,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 232 transitions, 2734 flow [2024-06-04 16:13:13,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 232 transitions, 2672 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:13,853 INFO L231 Difference]: Finished difference. Result has 123 places, 200 transitions, 2202 flow [2024-06-04 16:13:13,854 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} [2024-06-04 16:13:13,854 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 70 predicate places. [2024-06-04 16:13:13,854 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 200 transitions, 2202 flow [2024-06-04 16:13:13,855 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) [2024-06-04 16:13:13,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:13,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:13,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:13:13,855 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)] === [2024-06-04 16:13:13,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:13,856 INFO L85 PathProgramCache]: Analyzing trace with hash 432697851, now seen corresponding path program 2 times [2024-06-04 16:13:13,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:13,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911884237] [2024-06-04 16:13:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:13,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:14,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:14,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911884237] [2024-06-04 16:13:14,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911884237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:14,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:14,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:13:14,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158997454] [2024-06-04 16:13:14,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:14,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:13:14,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:13:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:13:14,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:13:14,282 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) [2024-06-04 16:13:14,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:14,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:13:14,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:15,237 INFO L124 PetriNetUnfolderBase]: 5443/8038 cut-off events. [2024-06-04 16:13:15,237 INFO L125 PetriNetUnfolderBase]: For 135923/136279 co-relation queries the response was YES. [2024-06-04 16:13:15,266 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. [2024-06-04 16:13:15,299 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 179 selfloop transitions, 29 changer transitions 0/226 dead transitions. [2024-06-04 16:13:15,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 226 transitions, 2684 flow [2024-06-04 16:13:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-04 16:13:15,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-06-04 16:13:15,300 INFO L175 Difference]: Start difference. First operand has 123 places, 200 transitions, 2202 flow. Second operand 6 states and 176 transitions. [2024-06-04 16:13:15,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 226 transitions, 2684 flow [2024-06-04 16:13:15,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 226 transitions, 2564 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-04 16:13:15,459 INFO L231 Difference]: Finished difference. Result has 127 places, 200 transitions, 2148 flow [2024-06-04 16:13:15,459 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} [2024-06-04 16:13:15,460 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 74 predicate places. [2024-06-04 16:13:15,460 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 200 transitions, 2148 flow [2024-06-04 16:13:15,460 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) [2024-06-04 16:13:15,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:15,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:15,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:13:15,461 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)] === [2024-06-04 16:13:15,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:15,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1028030029, now seen corresponding path program 1 times [2024-06-04 16:13:15,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:15,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672388615] [2024-06-04 16:13:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:15,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:15,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:15,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672388615] [2024-06-04 16:13:15,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672388615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:15,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:15,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:15,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967808992] [2024-06-04 16:13:15,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:15,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:15,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:15,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:15,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:15,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:15,800 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) [2024-06-04 16:13:15,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:15,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:15,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:16,696 INFO L124 PetriNetUnfolderBase]: 5682/8379 cut-off events. [2024-06-04 16:13:16,697 INFO L125 PetriNetUnfolderBase]: For 134437/134458 co-relation queries the response was YES. [2024-06-04 16:13:16,736 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. [2024-06-04 16:13:16,771 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 176 selfloop transitions, 43 changer transitions 0/227 dead transitions. [2024-06-04 16:13:16,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 227 transitions, 2752 flow [2024-06-04 16:13:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-04 16:13:16,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.612 [2024-06-04 16:13:16,772 INFO L175 Difference]: Start difference. First operand has 127 places, 200 transitions, 2148 flow. Second operand 5 states and 153 transitions. [2024-06-04 16:13:16,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 227 transitions, 2752 flow [2024-06-04 16:13:16,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 227 transitions, 2688 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:16,954 INFO L231 Difference]: Finished difference. Result has 128 places, 204 transitions, 2273 flow [2024-06-04 16:13:16,954 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} [2024-06-04 16:13:16,955 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 75 predicate places. [2024-06-04 16:13:16,955 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 204 transitions, 2273 flow [2024-06-04 16:13:16,955 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) [2024-06-04 16:13:16,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:16,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:16,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:13:16,955 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)] === [2024-06-04 16:13:16,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:16,956 INFO L85 PathProgramCache]: Analyzing trace with hash -912479389, now seen corresponding path program 2 times [2024-06-04 16:13:16,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:16,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729753432] [2024-06-04 16:13:16,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:16,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:17,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:17,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729753432] [2024-06-04 16:13:17,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729753432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:17,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:17,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:17,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719499207] [2024-06-04 16:13:17,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:17,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:17,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:17,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:17,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:17,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:17,292 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) [2024-06-04 16:13:17,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:17,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:17,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:18,194 INFO L124 PetriNetUnfolderBase]: 5698/8461 cut-off events. [2024-06-04 16:13:18,194 INFO L125 PetriNetUnfolderBase]: For 150629/150650 co-relation queries the response was YES. [2024-06-04 16:13:18,228 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. [2024-06-04 16:13:18,263 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 184 selfloop transitions, 52 changer transitions 0/244 dead transitions. [2024-06-04 16:13:18,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 244 transitions, 3107 flow [2024-06-04 16:13:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-04 16:13:18,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-04 16:13:18,269 INFO L175 Difference]: Start difference. First operand has 128 places, 204 transitions, 2273 flow. Second operand 6 states and 181 transitions. [2024-06-04 16:13:18,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 244 transitions, 3107 flow [2024-06-04 16:13:18,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 244 transitions, 2984 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:18,491 INFO L231 Difference]: Finished difference. Result has 131 places, 212 transitions, 2447 flow [2024-06-04 16:13:18,491 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} [2024-06-04 16:13:18,492 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 78 predicate places. [2024-06-04 16:13:18,492 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 212 transitions, 2447 flow [2024-06-04 16:13:18,492 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) [2024-06-04 16:13:18,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:18,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:18,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:13:18,492 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)] === [2024-06-04 16:13:18,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:18,493 INFO L85 PathProgramCache]: Analyzing trace with hash -912470089, now seen corresponding path program 3 times [2024-06-04 16:13:18,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:18,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128675690] [2024-06-04 16:13:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:18,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:18,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:18,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128675690] [2024-06-04 16:13:18,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128675690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:18,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:18,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:18,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484425076] [2024-06-04 16:13:18,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:18,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:18,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:18,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:18,836 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) [2024-06-04 16:13:18,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:18,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:18,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:19,724 INFO L124 PetriNetUnfolderBase]: 5714/8487 cut-off events. [2024-06-04 16:13:19,724 INFO L125 PetriNetUnfolderBase]: For 167290/167311 co-relation queries the response was YES. [2024-06-04 16:13:19,761 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. [2024-06-04 16:13:19,798 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 182 selfloop transitions, 55 changer transitions 0/245 dead transitions. [2024-06-04 16:13:19,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 245 transitions, 3199 flow [2024-06-04 16:13:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-04 16:13:19,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-06-04 16:13:19,799 INFO L175 Difference]: Start difference. First operand has 131 places, 212 transitions, 2447 flow. Second operand 6 states and 179 transitions. [2024-06-04 16:13:19,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 245 transitions, 3199 flow [2024-06-04 16:13:20,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 245 transitions, 3027 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-04 16:13:20,027 INFO L231 Difference]: Finished difference. Result has 135 places, 216 transitions, 2490 flow [2024-06-04 16:13:20,028 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} [2024-06-04 16:13:20,028 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 82 predicate places. [2024-06-04 16:13:20,028 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 216 transitions, 2490 flow [2024-06-04 16:13:20,029 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) [2024-06-04 16:13:20,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:20,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:20,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:13:20,029 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)] === [2024-06-04 16:13:20,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:20,030 INFO L85 PathProgramCache]: Analyzing trace with hash -934067499, now seen corresponding path program 4 times [2024-06-04 16:13:20,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:20,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741565438] [2024-06-04 16:13:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:20,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:20,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:20,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741565438] [2024-06-04 16:13:20,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741565438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:20,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:20,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:20,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356755196] [2024-06-04 16:13:20,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:20,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:20,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:20,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:20,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:20,387 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) [2024-06-04 16:13:20,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:20,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:20,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:21,321 INFO L124 PetriNetUnfolderBase]: 5707/8478 cut-off events. [2024-06-04 16:13:21,321 INFO L125 PetriNetUnfolderBase]: For 174556/174577 co-relation queries the response was YES. [2024-06-04 16:13:21,365 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. [2024-06-04 16:13:21,404 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 190 selfloop transitions, 43 changer transitions 0/241 dead transitions. [2024-06-04 16:13:21,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 241 transitions, 3034 flow [2024-06-04 16:13:21,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-04 16:13:21,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-04 16:13:21,406 INFO L175 Difference]: Start difference. First operand has 135 places, 216 transitions, 2490 flow. Second operand 5 states and 155 transitions. [2024-06-04 16:13:21,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 241 transitions, 3034 flow [2024-06-04 16:13:21,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 241 transitions, 2853 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:21,689 INFO L231 Difference]: Finished difference. Result has 137 places, 216 transitions, 2411 flow [2024-06-04 16:13:21,689 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} [2024-06-04 16:13:21,690 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 84 predicate places. [2024-06-04 16:13:21,690 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 216 transitions, 2411 flow [2024-06-04 16:13:21,690 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) [2024-06-04 16:13:21,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:21,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:21,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:13:21,691 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)] === [2024-06-04 16:13:21,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:21,691 INFO L85 PathProgramCache]: Analyzing trace with hash -349029910, now seen corresponding path program 1 times [2024-06-04 16:13:21,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:21,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268231755] [2024-06-04 16:13:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:21,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:21,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:21,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268231755] [2024-06-04 16:13:21,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268231755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:21,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:21,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:21,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711755961] [2024-06-04 16:13:21,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:21,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:21,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:21,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:22,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:22,034 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) [2024-06-04 16:13:22,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:22,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:22,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:23,024 INFO L124 PetriNetUnfolderBase]: 5766/8594 cut-off events. [2024-06-04 16:13:23,024 INFO L125 PetriNetUnfolderBase]: For 182405/182432 co-relation queries the response was YES. [2024-06-04 16:13:23,066 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. [2024-06-04 16:13:23,102 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 201 selfloop transitions, 91 changer transitions 0/300 dead transitions. [2024-06-04 16:13:23,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 300 transitions, 3869 flow [2024-06-04 16:13:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-06-04 16:13:23,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-04 16:13:23,104 INFO L175 Difference]: Start difference. First operand has 137 places, 216 transitions, 2411 flow. Second operand 10 states and 285 transitions. [2024-06-04 16:13:23,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 300 transitions, 3869 flow [2024-06-04 16:13:23,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 300 transitions, 3748 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:23,335 INFO L231 Difference]: Finished difference. Result has 145 places, 245 transitions, 2926 flow [2024-06-04 16:13:23,336 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} [2024-06-04 16:13:23,336 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 92 predicate places. [2024-06-04 16:13:23,336 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 245 transitions, 2926 flow [2024-06-04 16:13:23,336 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) [2024-06-04 16:13:23,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:23,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:23,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:13:23,337 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)] === [2024-06-04 16:13:23,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:23,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1248212812, now seen corresponding path program 2 times [2024-06-04 16:13:23,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:23,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668610063] [2024-06-04 16:13:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:23,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:23,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:23,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668610063] [2024-06-04 16:13:23,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668610063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:23,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:23,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:23,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704979585] [2024-06-04 16:13:23,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:23,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:23,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:23,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:23,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:23,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:23,712 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) [2024-06-04 16:13:23,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:23,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:23,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:24,851 INFO L124 PetriNetUnfolderBase]: 5769/8580 cut-off events. [2024-06-04 16:13:24,852 INFO L125 PetriNetUnfolderBase]: For 205984/206005 co-relation queries the response was YES. [2024-06-04 16:13:24,921 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. [2024-06-04 16:13:24,967 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 227 selfloop transitions, 49 changer transitions 0/284 dead transitions. [2024-06-04 16:13:24,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 284 transitions, 3772 flow [2024-06-04 16:13:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-04 16:13:24,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5828571428571429 [2024-06-04 16:13:24,968 INFO L175 Difference]: Start difference. First operand has 145 places, 245 transitions, 2926 flow. Second operand 7 states and 204 transitions. [2024-06-04 16:13:24,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 284 transitions, 3772 flow [2024-06-04 16:13:25,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 284 transitions, 3602 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:25,394 INFO L231 Difference]: Finished difference. Result has 150 places, 253 transitions, 3032 flow [2024-06-04 16:13:25,395 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} [2024-06-04 16:13:25,395 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 97 predicate places. [2024-06-04 16:13:25,396 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 253 transitions, 3032 flow [2024-06-04 16:13:25,396 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) [2024-06-04 16:13:25,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:25,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:25,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:13:25,396 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)] === [2024-06-04 16:13:25,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:25,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1442186632, now seen corresponding path program 3 times [2024-06-04 16:13:25,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:25,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807644751] [2024-06-04 16:13:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:25,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:25,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807644751] [2024-06-04 16:13:25,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807644751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:25,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:25,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:25,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152707271] [2024-06-04 16:13:25,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:25,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:25,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:25,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:25,796 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) [2024-06-04 16:13:25,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:25,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:25,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:27,018 INFO L124 PetriNetUnfolderBase]: 5881/8770 cut-off events. [2024-06-04 16:13:27,018 INFO L125 PetriNetUnfolderBase]: For 221007/221028 co-relation queries the response was YES. [2024-06-04 16:13:27,054 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. [2024-06-04 16:13:27,092 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 176 selfloop transitions, 146 changer transitions 0/330 dead transitions. [2024-06-04 16:13:27,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 330 transitions, 4608 flow [2024-06-04 16:13:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-06-04 16:13:27,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582 [2024-06-04 16:13:27,094 INFO L175 Difference]: Start difference. First operand has 150 places, 253 transitions, 3032 flow. Second operand 10 states and 291 transitions. [2024-06-04 16:13:27,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 330 transitions, 4608 flow [2024-06-04 16:13:27,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 330 transitions, 4426 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:27,504 INFO L231 Difference]: Finished difference. Result has 158 places, 281 transitions, 3678 flow [2024-06-04 16:13:27,505 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} [2024-06-04 16:13:27,505 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 105 predicate places. [2024-06-04 16:13:27,505 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 281 transitions, 3678 flow [2024-06-04 16:13:27,505 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) [2024-06-04 16:13:27,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:27,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:27,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:13:27,506 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)] === [2024-06-04 16:13:27,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1447900552, now seen corresponding path program 4 times [2024-06-04 16:13:27,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:27,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967666985] [2024-06-04 16:13:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:27,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:27,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:27,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967666985] [2024-06-04 16:13:27,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967666985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:27,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:27,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:27,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852745448] [2024-06-04 16:13:27,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:27,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:27,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:27,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:27,885 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) [2024-06-04 16:13:27,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:27,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:27,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:29,068 INFO L124 PetriNetUnfolderBase]: 5926/8834 cut-off events. [2024-06-04 16:13:29,069 INFO L125 PetriNetUnfolderBase]: For 246063/246078 co-relation queries the response was YES. [2024-06-04 16:13:29,122 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. [2024-06-04 16:13:29,165 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 173 selfloop transitions, 157 changer transitions 0/338 dead transitions. [2024-06-04 16:13:29,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 338 transitions, 5036 flow [2024-06-04 16:13:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2024-06-04 16:13:29,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911111111111111 [2024-06-04 16:13:29,166 INFO L175 Difference]: Start difference. First operand has 158 places, 281 transitions, 3678 flow. Second operand 9 states and 266 transitions. [2024-06-04 16:13:29,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 338 transitions, 5036 flow [2024-06-04 16:13:29,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 338 transitions, 4762 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:29,716 INFO L231 Difference]: Finished difference. Result has 163 places, 294 transitions, 3951 flow [2024-06-04 16:13:29,716 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} [2024-06-04 16:13:29,717 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 110 predicate places. [2024-06-04 16:13:29,717 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 294 transitions, 3951 flow [2024-06-04 16:13:29,717 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) [2024-06-04 16:13:29,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:29,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:29,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:13:29,718 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)] === [2024-06-04 16:13:29,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:29,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1248598762, now seen corresponding path program 5 times [2024-06-04 16:13:29,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:29,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106138300] [2024-06-04 16:13:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:29,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:30,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:30,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106138300] [2024-06-04 16:13:30,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106138300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:30,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:30,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:30,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415291568] [2024-06-04 16:13:30,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:30,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:30,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:30,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:30,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:30,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:30,104 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) [2024-06-04 16:13:30,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:30,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:30,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:31,419 INFO L124 PetriNetUnfolderBase]: 5918/8824 cut-off events. [2024-06-04 16:13:31,419 INFO L125 PetriNetUnfolderBase]: For 247227/247242 co-relation queries the response was YES. [2024-06-04 16:13:31,471 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. [2024-06-04 16:13:31,520 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 170 selfloop transitions, 150 changer transitions 0/328 dead transitions. [2024-06-04 16:13:31,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 328 transitions, 4873 flow [2024-06-04 16:13:31,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-04 16:13:31,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085714285714285 [2024-06-04 16:13:31,521 INFO L175 Difference]: Start difference. First operand has 163 places, 294 transitions, 3951 flow. Second operand 7 states and 213 transitions. [2024-06-04 16:13:31,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 328 transitions, 4873 flow [2024-06-04 16:13:32,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 328 transitions, 4539 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:32,117 INFO L231 Difference]: Finished difference. Result has 165 places, 294 transitions, 3927 flow [2024-06-04 16:13:32,117 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} [2024-06-04 16:13:32,118 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 112 predicate places. [2024-06-04 16:13:32,118 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 294 transitions, 3927 flow [2024-06-04 16:13:32,118 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) [2024-06-04 16:13:32,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:32,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:32,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:13:32,119 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)] === [2024-06-04 16:13:32,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:32,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1442194568, now seen corresponding path program 1 times [2024-06-04 16:13:32,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:32,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940805683] [2024-06-04 16:13:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:32,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:32,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:32,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940805683] [2024-06-04 16:13:32,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940805683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:32,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:32,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:32,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249436118] [2024-06-04 16:13:32,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:32,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:32,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:32,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:32,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:32,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:13:32,594 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) [2024-06-04 16:13:32,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:32,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:13:32,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:33,826 INFO L124 PetriNetUnfolderBase]: 6011/9004 cut-off events. [2024-06-04 16:13:33,826 INFO L125 PetriNetUnfolderBase]: For 281508/281538 co-relation queries the response was YES. [2024-06-04 16:13:33,878 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. [2024-06-04 16:13:33,921 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 236 selfloop transitions, 55 changer transitions 0/329 dead transitions. [2024-06-04 16:13:33,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 329 transitions, 4819 flow [2024-06-04 16:13:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-04 16:13:33,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914285714285714 [2024-06-04 16:13:33,923 INFO L175 Difference]: Start difference. First operand has 165 places, 294 transitions, 3927 flow. Second operand 7 states and 207 transitions. [2024-06-04 16:13:33,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 329 transitions, 4819 flow [2024-06-04 16:13:34,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 329 transitions, 4509 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:34,438 INFO L231 Difference]: Finished difference. Result has 166 places, 296 transitions, 3796 flow [2024-06-04 16:13:34,438 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} [2024-06-04 16:13:34,438 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 113 predicate places. [2024-06-04 16:13:34,439 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 296 transitions, 3796 flow [2024-06-04 16:13:34,439 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) [2024-06-04 16:13:34,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:34,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:34,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:13:34,439 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)] === [2024-06-04 16:13:34,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:34,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1455527048, now seen corresponding path program 2 times [2024-06-04 16:13:34,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:34,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299385183] [2024-06-04 16:13:34,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:34,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:34,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:34,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299385183] [2024-06-04 16:13:34,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299385183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:34,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:34,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:34,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420897894] [2024-06-04 16:13:34,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:34,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:34,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:34,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:13:34,893 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) [2024-06-04 16:13:34,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:34,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:13:34,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:36,047 INFO L124 PetriNetUnfolderBase]: 6412/9603 cut-off events. [2024-06-04 16:13:36,048 INFO L125 PetriNetUnfolderBase]: For 308965/308977 co-relation queries the response was YES. [2024-06-04 16:13:36,103 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. [2024-06-04 16:13:36,150 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 241 selfloop transitions, 60 changer transitions 0/339 dead transitions. [2024-06-04 16:13:36,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 339 transitions, 4830 flow [2024-06-04 16:13:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:36,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-04 16:13:36,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2024-06-04 16:13:36,151 INFO L175 Difference]: Start difference. First operand has 166 places, 296 transitions, 3796 flow. Second operand 7 states and 212 transitions. [2024-06-04 16:13:36,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 339 transitions, 4830 flow [2024-06-04 16:13:36,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 339 transitions, 4697 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:36,792 INFO L231 Difference]: Finished difference. Result has 168 places, 299 transitions, 3864 flow [2024-06-04 16:13:36,792 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} [2024-06-04 16:13:36,793 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 115 predicate places. [2024-06-04 16:13:36,793 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 299 transitions, 3864 flow [2024-06-04 16:13:36,793 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) [2024-06-04 16:13:36,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:36,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:36,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:13:36,793 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)] === [2024-06-04 16:13:36,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1170519957, now seen corresponding path program 1 times [2024-06-04 16:13:36,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:36,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106231406] [2024-06-04 16:13:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:36,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:37,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:37,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106231406] [2024-06-04 16:13:37,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106231406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:37,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:37,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:37,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682098583] [2024-06-04 16:13:37,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:37,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:37,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:37,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:37,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:37,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:13:37,151 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) [2024-06-04 16:13:37,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:37,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:13:37,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:38,313 INFO L124 PetriNetUnfolderBase]: 6164/9202 cut-off events. [2024-06-04 16:13:38,313 INFO L125 PetriNetUnfolderBase]: For 328827/329077 co-relation queries the response was YES. [2024-06-04 16:13:38,367 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. [2024-06-04 16:13:38,410 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 209 selfloop transitions, 60 changer transitions 0/325 dead transitions. [2024-06-04 16:13:38,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 325 transitions, 4684 flow [2024-06-04 16:13:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-04 16:13:38,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-04 16:13:38,412 INFO L175 Difference]: Start difference. First operand has 168 places, 299 transitions, 3864 flow. Second operand 6 states and 177 transitions. [2024-06-04 16:13:38,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 325 transitions, 4684 flow [2024-06-04 16:13:39,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 325 transitions, 4581 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:39,040 INFO L231 Difference]: Finished difference. Result has 171 places, 306 transitions, 3994 flow [2024-06-04 16:13:39,040 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} [2024-06-04 16:13:39,040 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 118 predicate places. [2024-06-04 16:13:39,041 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 306 transitions, 3994 flow [2024-06-04 16:13:39,041 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) [2024-06-04 16:13:39,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:39,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:39,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:13:39,041 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)] === [2024-06-04 16:13:39,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:39,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1007494462, now seen corresponding path program 1 times [2024-06-04 16:13:39,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:39,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085889269] [2024-06-04 16:13:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:39,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:39,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:39,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085889269] [2024-06-04 16:13:39,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085889269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:39,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:39,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:39,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940539859] [2024-06-04 16:13:39,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:39,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:39,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:39,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:39,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:39,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:39,428 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) [2024-06-04 16:13:39,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:39,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:39,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:41,040 INFO L124 PetriNetUnfolderBase]: 8539/12677 cut-off events. [2024-06-04 16:13:41,040 INFO L125 PetriNetUnfolderBase]: For 449127/449148 co-relation queries the response was YES. [2024-06-04 16:13:41,117 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. [2024-06-04 16:13:41,176 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 308 selfloop transitions, 83 changer transitions 0/399 dead transitions. [2024-06-04 16:13:41,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 399 transitions, 5808 flow [2024-06-04 16:13:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:41,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-06-04 16:13:41,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177777777777778 [2024-06-04 16:13:41,178 INFO L175 Difference]: Start difference. First operand has 171 places, 306 transitions, 3994 flow. Second operand 9 states and 278 transitions. [2024-06-04 16:13:41,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 399 transitions, 5808 flow [2024-06-04 16:13:42,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 399 transitions, 5652 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:42,009 INFO L231 Difference]: Finished difference. Result has 178 places, 321 transitions, 4348 flow [2024-06-04 16:13:42,009 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} [2024-06-04 16:13:42,009 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 125 predicate places. [2024-06-04 16:13:42,009 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 321 transitions, 4348 flow [2024-06-04 16:13:42,009 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) [2024-06-04 16:13:42,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:42,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:42,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:13:42,010 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)] === [2024-06-04 16:13:42,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:42,010 INFO L85 PathProgramCache]: Analyzing trace with hash -918928702, now seen corresponding path program 2 times [2024-06-04 16:13:42,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:42,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357251517] [2024-06-04 16:13:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:42,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:42,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:42,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357251517] [2024-06-04 16:13:42,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357251517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:42,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:42,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:42,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783732919] [2024-06-04 16:13:42,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:42,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:42,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:42,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:42,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:42,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:42,365 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) [2024-06-04 16:13:42,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:42,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:42,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:44,314 INFO L124 PetriNetUnfolderBase]: 9839/14585 cut-off events. [2024-06-04 16:13:44,314 INFO L125 PetriNetUnfolderBase]: For 581466/581487 co-relation queries the response was YES. [2024-06-04 16:13:44,405 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. [2024-06-04 16:13:44,780 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 307 selfloop transitions, 80 changer transitions 0/395 dead transitions. [2024-06-04 16:13:44,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 395 transitions, 5943 flow [2024-06-04 16:13:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 296 transitions. [2024-06-04 16:13:44,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592 [2024-06-04 16:13:44,782 INFO L175 Difference]: Start difference. First operand has 178 places, 321 transitions, 4348 flow. Second operand 10 states and 296 transitions. [2024-06-04 16:13:44,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 395 transitions, 5943 flow [2024-06-04 16:13:45,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 395 transitions, 5752 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:45,940 INFO L231 Difference]: Finished difference. Result has 185 places, 328 transitions, 4520 flow [2024-06-04 16:13:45,941 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} [2024-06-04 16:13:45,941 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 132 predicate places. [2024-06-04 16:13:45,941 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 328 transitions, 4520 flow [2024-06-04 16:13:45,941 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) [2024-06-04 16:13:45,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:45,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:45,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:13:45,942 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)] === [2024-06-04 16:13:45,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:45,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1005616792, now seen corresponding path program 3 times [2024-06-04 16:13:45,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:45,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084786470] [2024-06-04 16:13:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:45,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:46,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:46,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084786470] [2024-06-04 16:13:46,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084786470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:46,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:46,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:46,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372970463] [2024-06-04 16:13:46,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:46,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:46,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:46,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:46,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:46,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:46,266 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) [2024-06-04 16:13:46,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:46,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:46,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:48,224 INFO L124 PetriNetUnfolderBase]: 10109/14979 cut-off events. [2024-06-04 16:13:48,224 INFO L125 PetriNetUnfolderBase]: For 594990/595011 co-relation queries the response was YES. [2024-06-04 16:13:48,319 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. [2024-06-04 16:13:48,394 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 300 selfloop transitions, 77 changer transitions 0/385 dead transitions. [2024-06-04 16:13:48,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 385 transitions, 5777 flow [2024-06-04 16:13:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 286 transitions. [2024-06-04 16:13:48,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-06-04 16:13:48,395 INFO L175 Difference]: Start difference. First operand has 185 places, 328 transitions, 4520 flow. Second operand 10 states and 286 transitions. [2024-06-04 16:13:48,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 385 transitions, 5777 flow [2024-06-04 16:13:49,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 385 transitions, 5590 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:49,852 INFO L231 Difference]: Finished difference. Result has 189 places, 331 transitions, 4595 flow [2024-06-04 16:13:49,852 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} [2024-06-04 16:13:49,853 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-06-04 16:13:49,853 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 331 transitions, 4595 flow [2024-06-04 16:13:49,853 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) [2024-06-04 16:13:49,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:49,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:49,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:13:49,853 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)] === [2024-06-04 16:13:49,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:49,854 INFO L85 PathProgramCache]: Analyzing trace with hash 794586155, now seen corresponding path program 1 times [2024-06-04 16:13:49,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:49,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102302242] [2024-06-04 16:13:49,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:49,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:50,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:50,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102302242] [2024-06-04 16:13:50,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102302242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:50,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:50,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:50,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966326183] [2024-06-04 16:13:50,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:50,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:50,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:50,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:50,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:50,129 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) [2024-06-04 16:13:50,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:50,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:50,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:53,153 INFO L124 PetriNetUnfolderBase]: 10119/15010 cut-off events. [2024-06-04 16:13:53,153 INFO L125 PetriNetUnfolderBase]: For 552098/552107 co-relation queries the response was YES. [2024-06-04 16:13:53,250 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. [2024-06-04 16:13:53,341 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 331 selfloop transitions, 32 changer transitions 0/371 dead transitions. [2024-06-04 16:13:53,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 371 transitions, 5828 flow [2024-06-04 16:13:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-04 16:13:53,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-04 16:13:53,342 INFO L175 Difference]: Start difference. First operand has 189 places, 331 transitions, 4595 flow. Second operand 7 states and 189 transitions. [2024-06-04 16:13:53,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 371 transitions, 5828 flow [2024-06-04 16:13:54,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 371 transitions, 5594 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-04 16:13:54,576 INFO L231 Difference]: Finished difference. Result has 189 places, 348 transitions, 4826 flow [2024-06-04 16:13:54,576 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} [2024-06-04 16:13:54,577 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-06-04 16:13:54,577 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 348 transitions, 4826 flow [2024-06-04 16:13:54,577 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) [2024-06-04 16:13:54,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:54,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:54,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:13:54,577 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)] === [2024-06-04 16:13:54,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:54,578 INFO L85 PathProgramCache]: Analyzing trace with hash 847087850, now seen corresponding path program 4 times [2024-06-04 16:13:54,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:54,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058210597] [2024-06-04 16:13:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:54,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:54,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:54,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058210597] [2024-06-04 16:13:54,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058210597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:54,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:54,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:54,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716410777] [2024-06-04 16:13:54,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:54,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:54,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:54,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:55,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:55,090 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) [2024-06-04 16:13:55,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:55,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:55,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:57,905 INFO L124 PetriNetUnfolderBase]: 11196/16559 cut-off events. [2024-06-04 16:13:57,905 INFO L125 PetriNetUnfolderBase]: For 731638/731653 co-relation queries the response was YES. [2024-06-04 16:13:58,006 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. [2024-06-04 16:13:58,083 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 298 selfloop transitions, 90 changer transitions 1/397 dead transitions. [2024-06-04 16:13:58,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 397 transitions, 5984 flow [2024-06-04 16:13:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2024-06-04 16:13:58,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-06-04 16:13:58,084 INFO L175 Difference]: Start difference. First operand has 189 places, 348 transitions, 4826 flow. Second operand 9 states and 267 transitions. [2024-06-04 16:13:58,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 397 transitions, 5984 flow [2024-06-04 16:13:59,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 397 transitions, 5896 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-04 16:13:59,368 INFO L231 Difference]: Finished difference. Result has 196 places, 350 transitions, 5018 flow [2024-06-04 16:13:59,369 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} [2024-06-04 16:13:59,369 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 143 predicate places. [2024-06-04 16:13:59,369 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 350 transitions, 5018 flow [2024-06-04 16:13:59,369 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) [2024-06-04 16:13:59,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:59,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:59,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:13:59,370 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)] === [2024-06-04 16:13:59,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1704651274, now seen corresponding path program 5 times [2024-06-04 16:13:59,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:59,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113612683] [2024-06-04 16:13:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:59,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:59,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:59,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113612683] [2024-06-04 16:13:59,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113612683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:59,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:59,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:59,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279641826] [2024-06-04 16:13:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:59,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:13:59,821 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) [2024-06-04 16:13:59,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:59,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:13:59,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:03,194 INFO L124 PetriNetUnfolderBase]: 12454/18409 cut-off events. [2024-06-04 16:14:03,194 INFO L125 PetriNetUnfolderBase]: For 816274/816289 co-relation queries the response was YES. [2024-06-04 16:14:03,299 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. [2024-06-04 16:14:03,381 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 298 selfloop transitions, 87 changer transitions 0/393 dead transitions. [2024-06-04 16:14:03,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 393 transitions, 6146 flow [2024-06-04 16:14:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-04 16:14:03,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-04 16:14:03,382 INFO L175 Difference]: Start difference. First operand has 196 places, 350 transitions, 5018 flow. Second operand 7 states and 217 transitions. [2024-06-04 16:14:03,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 393 transitions, 6146 flow [2024-06-04 16:14:04,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 393 transitions, 5913 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:04,950 INFO L231 Difference]: Finished difference. Result has 196 places, 353 transitions, 5077 flow [2024-06-04 16:14:04,950 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} [2024-06-04 16:14:04,951 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 143 predicate places. [2024-06-04 16:14:04,951 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 353 transitions, 5077 flow [2024-06-04 16:14:04,951 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) [2024-06-04 16:14:04,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:04,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:04,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:14:04,951 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)] === [2024-06-04 16:14:04,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:04,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1704647554, now seen corresponding path program 6 times [2024-06-04 16:14:04,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:04,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027661579] [2024-06-04 16:14:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:04,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:05,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:05,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027661579] [2024-06-04 16:14:05,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027661579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:05,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:05,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:05,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608394377] [2024-06-04 16:14:05,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:05,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:05,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:05,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:05,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:05,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:14:05,416 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) [2024-06-04 16:14:05,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:05,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:14:05,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:09,266 INFO L124 PetriNetUnfolderBase]: 14904/22199 cut-off events. [2024-06-04 16:14:09,266 INFO L125 PetriNetUnfolderBase]: For 971686/971701 co-relation queries the response was YES. [2024-06-04 16:14:09,409 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. [2024-06-04 16:14:09,505 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 312 selfloop transitions, 98 changer transitions 0/418 dead transitions. [2024-06-04 16:14:09,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 418 transitions, 6609 flow [2024-06-04 16:14:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-04 16:14:09,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485714285714286 [2024-06-04 16:14:09,506 INFO L175 Difference]: Start difference. First operand has 196 places, 353 transitions, 5077 flow. Second operand 7 states and 227 transitions. [2024-06-04 16:14:09,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 418 transitions, 6609 flow [2024-06-04 16:14:11,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 418 transitions, 6379 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-04 16:14:11,800 INFO L231 Difference]: Finished difference. Result has 199 places, 364 transitions, 5391 flow [2024-06-04 16:14:11,800 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} [2024-06-04 16:14:11,800 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 146 predicate places. [2024-06-04 16:14:11,801 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 364 transitions, 5391 flow [2024-06-04 16:14:11,801 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) [2024-06-04 16:14:11,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:11,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:11,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:14:11,802 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)] === [2024-06-04 16:14:11,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:11,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1455533000, now seen corresponding path program 1 times [2024-06-04 16:14:11,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:11,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101397095] [2024-06-04 16:14:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:11,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:12,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:12,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101397095] [2024-06-04 16:14:12,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101397095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:12,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:12,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:12,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042831999] [2024-06-04 16:14:12,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:12,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:12,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:12,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:12,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:12,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:14:12,173 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) [2024-06-04 16:14:12,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:12,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:14:12,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:16,440 INFO L124 PetriNetUnfolderBase]: 15948/23752 cut-off events. [2024-06-04 16:14:16,440 INFO L125 PetriNetUnfolderBase]: For 1034422/1034437 co-relation queries the response was YES. [2024-06-04 16:14:16,589 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. [2024-06-04 16:14:16,688 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 316 selfloop transitions, 99 changer transitions 1/424 dead transitions. [2024-06-04 16:14:16,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 424 transitions, 6721 flow [2024-06-04 16:14:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 272 transitions. [2024-06-04 16:14:16,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6044444444444445 [2024-06-04 16:14:16,690 INFO L175 Difference]: Start difference. First operand has 199 places, 364 transitions, 5391 flow. Second operand 9 states and 272 transitions. [2024-06-04 16:14:16,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 424 transitions, 6721 flow [2024-06-04 16:14:19,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 424 transitions, 6506 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-04 16:14:19,494 INFO L231 Difference]: Finished difference. Result has 206 places, 369 transitions, 5546 flow [2024-06-04 16:14:19,494 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} [2024-06-04 16:14:19,495 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 153 predicate places. [2024-06-04 16:14:19,495 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 369 transitions, 5546 flow [2024-06-04 16:14:19,495 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) [2024-06-04 16:14:19,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:19,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:19,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:14:19,496 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)] === [2024-06-04 16:14:19,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:19,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1154801655, now seen corresponding path program 2 times [2024-06-04 16:14:19,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:19,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431740501] [2024-06-04 16:14:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:19,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:19,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:19,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431740501] [2024-06-04 16:14:19,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431740501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:19,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:19,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:19,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335694984] [2024-06-04 16:14:19,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:19,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:19,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:19,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:19,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:14:19,915 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) [2024-06-04 16:14:19,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:19,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:14:19,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:23,893 INFO L124 PetriNetUnfolderBase]: 15894/23668 cut-off events. [2024-06-04 16:14:23,893 INFO L125 PetriNetUnfolderBase]: For 882230/882254 co-relation queries the response was YES. [2024-06-04 16:14:24,454 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. [2024-06-04 16:14:24,585 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 344 selfloop transitions, 31 changer transitions 0/383 dead transitions. [2024-06-04 16:14:24,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 383 transitions, 6360 flow [2024-06-04 16:14:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-04 16:14:24,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-04 16:14:24,586 INFO L175 Difference]: Start difference. First operand has 206 places, 369 transitions, 5546 flow. Second operand 5 states and 140 transitions. [2024-06-04 16:14:24,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 383 transitions, 6360 flow [2024-06-04 16:14:27,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 383 transitions, 6145 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-04 16:14:27,148 INFO L231 Difference]: Finished difference. Result has 206 places, 369 transitions, 5402 flow [2024-06-04 16:14:27,149 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} [2024-06-04 16:14:27,149 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 153 predicate places. [2024-06-04 16:14:27,149 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 369 transitions, 5402 flow [2024-06-04 16:14:27,150 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) [2024-06-04 16:14:27,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:27,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:27,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:14:27,150 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)] === [2024-06-04 16:14:27,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1154788759, now seen corresponding path program 1 times [2024-06-04 16:14:27,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:27,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613916805] [2024-06-04 16:14:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:27,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:27,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613916805] [2024-06-04 16:14:27,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613916805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:27,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:27,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:27,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884321632] [2024-06-04 16:14:27,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:27,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:27,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:27,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:27,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:27,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:14:27,734 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) [2024-06-04 16:14:27,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:27,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:14:27,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand