./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 [2024-06-03 20:46:32,751 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:46:32,824 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:46:32,830 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:46:32,831 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:46:32,863 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:46:32,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:46:32,864 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:46:32,865 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:46:32,869 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:46:32,869 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:46:32,869 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:46:32,870 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:46:32,872 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:46:32,872 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:46:32,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:46:32,873 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:46:32,873 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:46:32,873 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:46:32,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:46:32,874 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:46:32,875 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:46:32,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:46:32,876 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:46:32,876 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:46:32,876 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:46:32,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:46:32,877 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:46:32,877 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:46:32,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:46:32,879 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:46:32,879 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:46:32,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:46:32,879 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:46:32,880 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:46:32,880 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:46:32,880 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:46:32,880 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:46:32,880 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:46:32,892 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:46:32,893 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:46:32,893 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:46:32,893 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:46:32,893 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:46:33,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:46:33,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:46:33,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:46:33,164 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:46:33,165 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:46:33,166 INFO L431 ainManager$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 [2024-06-03 20:46:34,329 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:46:34,611 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:46:34,612 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:46:34,635 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86fde75cf/b4aaa79cafe344e6b4e15b618093aa70/FLAG430d878d0 [2024-06-03 20:46:34,650 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86fde75cf/b4aaa79cafe344e6b4e15b618093aa70 [2024-06-03 20:46:34,653 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:46:34,653 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:46:34,655 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 20:46:34,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:46:34,824 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:46:34,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:46:34,826 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:46:34,831 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:46:34,832 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:46:34" (1/2) ... [2024-06-03 20:46:34,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c35eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:46:34, skipping insertion in model container [2024-06-03 20:46:34,833 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:46:34" (1/2) ... [2024-06-03 20:46:34,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ff53020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:46:34, skipping insertion in model container [2024-06-03 20:46:34,835 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:46:34" (2/2) ... [2024-06-03 20:46:34,836 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c35eeb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:34, skipping insertion in model container [2024-06-03 20:46:34,836 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:46:34" (2/2) ... [2024-06-03 20:46:34,836 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:46:34,900 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:46:34,902 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))) [2024-06-03 20:46:34,902 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))) [2024-06-03 20:46:34,902 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))) [2024-06-03 20:46:34,902 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))) [2024-06-03 20:46:34,903 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:46:34,903 INFO L106 edCorrectnessWitness]: ghost_update [L789-L789] multithreaded = 1; [2024-06-03 20:46:34,948 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:46:35,291 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:46:35,300 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:46:35,466 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:46:35,522 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:46:35,523 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35 WrapperNode [2024-06-03 20:46:35,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:46:35,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:46:35,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:46:35,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:46:35,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,564 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,603 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2024-06-03 20:46:35,604 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:46:35,605 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:46:35,605 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:46:35,605 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:46:35,620 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,625 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,651 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]. [2024-06-03 20:46:35,652 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,652 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,676 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,678 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,683 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,687 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:46:35,691 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:46:35,691 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:46:35,692 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:46:35,692 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (1/1) ... [2024-06-03 20:46:35,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:46:35,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:46:35,725 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) [2024-06-03 20:46:35,750 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 [2024-06-03 20:46:35,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:46:35,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:46:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:46:35,767 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:46:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:46:35,768 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:46:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:46:35,768 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:46:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 20:46:35,768 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 20:46:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:46:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:46:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:46:35,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:46:35,771 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:46:35,923 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:46:35,926 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:46:36,303 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:46:36,303 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:46:36,410 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:46:36,411 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:46:36,412 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:46:36 BoogieIcfgContainer [2024-06-03 20:46:36,412 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:46:36,414 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:46:36,414 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:46:36,417 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:46:36,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:46:34" (1/4) ... [2024-06-03 20:46:36,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4013824c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:46:36, skipping insertion in model container [2024-06-03 20:46:36,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:46:34" (2/4) ... [2024-06-03 20:46:36,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4013824c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:46:36, skipping insertion in model container [2024-06-03 20:46:36,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:35" (3/4) ... [2024-06-03 20:46:36,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4013824c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:46:36, skipping insertion in model container [2024-06-03 20:46:36,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:46:36" (4/4) ... [2024-06-03 20:46:36,420 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:46:36,436 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:46:36,436 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 20:46:36,436 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:46:36,501 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:46:36,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 50 transitions, 116 flow [2024-06-03 20:46:36,580 INFO L124 PetriNetUnfolderBase]: 0/46 cut-off events. [2024-06-03 20:46:36,581 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:46:36,583 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. [2024-06-03 20:46:36,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 50 transitions, 116 flow [2024-06-03 20:46:36,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 40 transitions, 92 flow [2024-06-03 20:46:36,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:46:36,604 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;@19d438b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:46:36,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 20:46:36,609 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:46:36,609 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 20:46:36,610 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:46:36,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:36,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:46:36,611 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)] === [2024-06-03 20:46:36,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:36,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1396109065, now seen corresponding path program 1 times [2024-06-03 20:46:36,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:36,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385285943] [2024-06-03 20:46:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:36,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:37,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:37,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385285943] [2024-06-03 20:46:37,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385285943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:37,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:37,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:46:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274579742] [2024-06-03 20:46:37,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:37,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:46:37,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:37,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:46:37,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:46:37,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-06-03 20:46:37,470 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) [2024-06-03 20:46:37,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:37,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-06-03 20:46:37,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:38,002 INFO L124 PetriNetUnfolderBase]: 1971/2943 cut-off events. [2024-06-03 20:46:38,002 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-06-03 20:46:38,014 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. [2024-06-03 20:46:38,035 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 38 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-06-03 20:46:38,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 215 flow [2024-06-03 20:46:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:46:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:46:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-03 20:46:38,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2024-06-03 20:46:38,049 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 92 flow. Second operand 3 states and 104 transitions. [2024-06-03 20:46:38,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 215 flow [2024-06-03 20:46:38,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:38,062 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 127 flow [2024-06-03 20:46:38,064 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} [2024-06-03 20:46:38,069 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-03 20:46:38,069 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 127 flow [2024-06-03 20:46:38,070 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) [2024-06-03 20:46:38,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:38,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:38,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:46:38,071 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)] === [2024-06-03 20:46:38,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:38,071 INFO L85 PathProgramCache]: Analyzing trace with hash 74239535, now seen corresponding path program 1 times [2024-06-03 20:46:38,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:38,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967471123] [2024-06-03 20:46:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:38,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:38,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:38,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967471123] [2024-06-03 20:46:38,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967471123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:38,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:38,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:38,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931081781] [2024-06-03 20:46:38,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:38,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:38,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:38,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:38,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 20:46:38,450 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) [2024-06-03 20:46:38,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:38,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 20:46:38,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:39,002 INFO L124 PetriNetUnfolderBase]: 3439/5046 cut-off events. [2024-06-03 20:46:39,003 INFO L125 PetriNetUnfolderBase]: For 938/956 co-relation queries the response was YES. [2024-06-03 20:46:39,013 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. [2024-06-03 20:46:39,042 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 49 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-03 20:46:39,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 299 flow [2024-06-03 20:46:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:46:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:46:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-03 20:46:39,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-03 20:46:39,049 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 127 flow. Second operand 4 states and 129 transitions. [2024-06-03 20:46:39,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 299 flow [2024-06-03 20:46:39,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:46:39,052 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 162 flow [2024-06-03 20:46:39,053 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} [2024-06-03 20:46:39,053 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-06-03 20:46:39,054 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 162 flow [2024-06-03 20:46:39,056 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) [2024-06-03 20:46:39,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:39,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:39,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:46:39,057 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)] === [2024-06-03 20:46:39,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:39,065 INFO L85 PathProgramCache]: Analyzing trace with hash -331451323, now seen corresponding path program 1 times [2024-06-03 20:46:39,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:39,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178778804] [2024-06-03 20:46:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:39,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:39,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:39,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178778804] [2024-06-03 20:46:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178778804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:39,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:39,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:46:39,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644917677] [2024-06-03 20:46:39,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:39,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:46:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:46:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:46:39,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 20:46:39,464 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) [2024-06-03 20:46:39,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:39,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 20:46:39,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:40,068 INFO L124 PetriNetUnfolderBase]: 3382/5002 cut-off events. [2024-06-03 20:46:40,068 INFO L125 PetriNetUnfolderBase]: For 2387/2387 co-relation queries the response was YES. [2024-06-03 20:46:40,077 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. [2024-06-03 20:46:40,103 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-03 20:46:40,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 358 flow [2024-06-03 20:46:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:46:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:46:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-03 20:46:40,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-03 20:46:40,108 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 162 flow. Second operand 4 states and 126 transitions. [2024-06-03 20:46:40,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 358 flow [2024-06-03 20:46:40,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 336 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:40,114 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 214 flow [2024-06-03 20:46:40,114 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} [2024-06-03 20:46:40,115 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-06-03 20:46:40,116 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 214 flow [2024-06-03 20:46:40,116 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) [2024-06-03 20:46:40,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:40,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:40,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:46:40,117 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)] === [2024-06-03 20:46:40,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:40,117 INFO L85 PathProgramCache]: Analyzing trace with hash -697114588, now seen corresponding path program 1 times [2024-06-03 20:46:40,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:40,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885627489] [2024-06-03 20:46:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:40,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:40,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:40,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885627489] [2024-06-03 20:46:40,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885627489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:40,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:40,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:46:40,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035944059] [2024-06-03 20:46:40,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:40,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:46:40,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:40,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:46:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:46:40,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 20:46:40,594 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) [2024-06-03 20:46:40,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:40,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 20:46:40,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:41,210 INFO L124 PetriNetUnfolderBase]: 3367/4973 cut-off events. [2024-06-03 20:46:41,210 INFO L125 PetriNetUnfolderBase]: For 4260/4260 co-relation queries the response was YES. [2024-06-03 20:46:41,221 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. [2024-06-03 20:46:41,251 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 61 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-03 20:46:41,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 440 flow [2024-06-03 20:46:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-03 20:46:41,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-03 20:46:41,254 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 214 flow. Second operand 5 states and 154 transitions. [2024-06-03 20:46:41,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 440 flow [2024-06-03 20:46:41,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 436 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 20:46:41,262 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 266 flow [2024-06-03 20:46:41,262 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} [2024-06-03 20:46:41,267 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-03 20:46:41,267 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 266 flow [2024-06-03 20:46:41,267 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) [2024-06-03 20:46:41,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:41,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:41,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:46:41,268 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)] === [2024-06-03 20:46:41,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:41,269 INFO L85 PathProgramCache]: Analyzing trace with hash -185775736, now seen corresponding path program 1 times [2024-06-03 20:46:41,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:41,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558586008] [2024-06-03 20:46:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:41,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:41,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:41,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558586008] [2024-06-03 20:46:41,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558586008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:41,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:41,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:41,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205978891] [2024-06-03 20:46:41,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:41,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:41,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:41,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:41,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:41,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:46:41,691 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) [2024-06-03 20:46:41,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:41,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:46:41,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:42,472 INFO L124 PetriNetUnfolderBase]: 4344/6383 cut-off events. [2024-06-03 20:46:42,473 INFO L125 PetriNetUnfolderBase]: For 8370/8382 co-relation queries the response was YES. [2024-06-03 20:46:42,488 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. [2024-06-03 20:46:42,520 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 59 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-03 20:46:42,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 514 flow [2024-06-03 20:46:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:46:42,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:46:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-03 20:46:42,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-03 20:46:42,526 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 266 flow. Second operand 4 states and 129 transitions. [2024-06-03 20:46:42,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 514 flow [2024-06-03 20:46:42,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 484 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:42,536 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 336 flow [2024-06-03 20:46:42,538 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} [2024-06-03 20:46:42,540 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-06-03 20:46:42,540 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 336 flow [2024-06-03 20:46:42,540 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) [2024-06-03 20:46:42,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:42,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:42,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:46:42,541 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)] === [2024-06-03 20:46:42,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash -174037276, now seen corresponding path program 2 times [2024-06-03 20:46:42,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:42,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833970424] [2024-06-03 20:46:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:42,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:42,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:42,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833970424] [2024-06-03 20:46:42,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833970424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:42,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:42,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:42,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228711989] [2024-06-03 20:46:42,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:42,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:42,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:42,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:42,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:42,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:46:42,977 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) [2024-06-03 20:46:42,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:42,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:46:42,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:43,658 INFO L124 PetriNetUnfolderBase]: 4335/6390 cut-off events. [2024-06-03 20:46:43,659 INFO L125 PetriNetUnfolderBase]: For 12420/12423 co-relation queries the response was YES. [2024-06-03 20:46:43,676 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. [2024-06-03 20:46:43,705 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 72 selfloop transitions, 20 changer transitions 0/100 dead transitions. [2024-06-03 20:46:43,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 100 transitions, 678 flow [2024-06-03 20:46:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-03 20:46:43,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-03 20:46:43,707 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 336 flow. Second operand 5 states and 154 transitions. [2024-06-03 20:46:43,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 100 transitions, 678 flow [2024-06-03 20:46:43,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 610 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:43,728 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 449 flow [2024-06-03 20:46:43,728 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} [2024-06-03 20:46:43,731 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-06-03 20:46:43,732 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 449 flow [2024-06-03 20:46:43,732 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) [2024-06-03 20:46:43,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:43,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:43,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:46:43,733 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)] === [2024-06-03 20:46:43,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:43,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1597410852, now seen corresponding path program 1 times [2024-06-03 20:46:43,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:43,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471483616] [2024-06-03 20:46:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:43,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:44,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:44,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471483616] [2024-06-03 20:46:44,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471483616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:44,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:44,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:44,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645588265] [2024-06-03 20:46:44,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:44,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:44,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:44,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:44,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:44,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 20:46:44,251 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) [2024-06-03 20:46:44,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:44,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 20:46:44,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:44,937 INFO L124 PetriNetUnfolderBase]: 4262/6356 cut-off events. [2024-06-03 20:46:44,938 INFO L125 PetriNetUnfolderBase]: For 13252/13261 co-relation queries the response was YES. [2024-06-03 20:46:44,956 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. [2024-06-03 20:46:44,982 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 69 selfloop transitions, 22 changer transitions 0/104 dead transitions. [2024-06-03 20:46:44,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 753 flow [2024-06-03 20:46:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-03 20:46:44,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608 [2024-06-03 20:46:44,984 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 449 flow. Second operand 5 states and 152 transitions. [2024-06-03 20:46:44,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 753 flow [2024-06-03 20:46:44,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 104 transitions, 721 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-03 20:46:44,996 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 559 flow [2024-06-03 20:46:44,997 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} [2024-06-03 20:46:44,998 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 21 predicate places. [2024-06-03 20:46:44,998 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 559 flow [2024-06-03 20:46:44,998 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) [2024-06-03 20:46:44,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:44,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:44,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:46:44,999 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)] === [2024-06-03 20:46:44,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:44,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1855309127, now seen corresponding path program 1 times [2024-06-03 20:46:44,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:45,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192645131] [2024-06-03 20:46:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:45,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:45,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:45,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192645131] [2024-06-03 20:46:45,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192645131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:45,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:45,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:45,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295907041] [2024-06-03 20:46:45,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:45,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:45,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:45,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:45,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:45,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:46:45,430 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) [2024-06-03 20:46:45,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:45,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:46:45,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:46,432 INFO L124 PetriNetUnfolderBase]: 5048/7453 cut-off events. [2024-06-03 20:46:46,433 INFO L125 PetriNetUnfolderBase]: For 25439/25460 co-relation queries the response was YES. [2024-06-03 20:46:46,463 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. [2024-06-03 20:46:46,509 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 97 selfloop transitions, 36 changer transitions 0/141 dead transitions. [2024-06-03 20:46:46,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 141 transitions, 1089 flow [2024-06-03 20:46:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:46,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-03 20:46:46,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466666666666666 [2024-06-03 20:46:46,512 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 559 flow. Second operand 6 states and 194 transitions. [2024-06-03 20:46:46,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 141 transitions, 1089 flow [2024-06-03 20:46:46,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 141 transitions, 1065 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-03 20:46:46,544 INFO L231 Difference]: Finished difference. Result has 80 places, 96 transitions, 736 flow [2024-06-03 20:46:46,545 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} [2024-06-03 20:46:46,546 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 27 predicate places. [2024-06-03 20:46:46,547 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 96 transitions, 736 flow [2024-06-03 20:46:46,547 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) [2024-06-03 20:46:46,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:46,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:46,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:46:46,548 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)] === [2024-06-03 20:46:46,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash 998102265, now seen corresponding path program 2 times [2024-06-03 20:46:46,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:46,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210339239] [2024-06-03 20:46:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:46,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:46,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:46,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210339239] [2024-06-03 20:46:46,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210339239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:46,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:46,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:46,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122709984] [2024-06-03 20:46:46,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:46,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:46,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:47,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:46:47,023 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) [2024-06-03 20:46:47,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:47,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:46:47,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:47,933 INFO L124 PetriNetUnfolderBase]: 4926/7275 cut-off events. [2024-06-03 20:46:47,933 INFO L125 PetriNetUnfolderBase]: For 32214/32235 co-relation queries the response was YES. [2024-06-03 20:46:47,959 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. [2024-06-03 20:46:47,996 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 91 selfloop transitions, 30 changer transitions 0/129 dead transitions. [2024-06-03 20:46:47,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 1101 flow [2024-06-03 20:46:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-03 20:46:48,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644 [2024-06-03 20:46:48,001 INFO L175 Difference]: Start difference. First operand has 80 places, 96 transitions, 736 flow. Second operand 5 states and 161 transitions. [2024-06-03 20:46:48,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 1101 flow [2024-06-03 20:46:48,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 1045 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:48,043 INFO L231 Difference]: Finished difference. Result has 83 places, 97 transitions, 773 flow [2024-06-03 20:46:48,043 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} [2024-06-03 20:46:48,044 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-06-03 20:46:48,044 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 97 transitions, 773 flow [2024-06-03 20:46:48,045 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) [2024-06-03 20:46:48,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:48,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:48,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:46:48,045 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)] === [2024-06-03 20:46:48,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:48,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1973457257, now seen corresponding path program 3 times [2024-06-03 20:46:48,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:48,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991839800] [2024-06-03 20:46:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:48,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:48,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:48,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991839800] [2024-06-03 20:46:48,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991839800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:48,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:48,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:48,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716012539] [2024-06-03 20:46:48,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:48,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:48,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:48,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:46:48,457 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) [2024-06-03 20:46:48,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:48,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:46:48,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:49,325 INFO L124 PetriNetUnfolderBase]: 5003/7391 cut-off events. [2024-06-03 20:46:49,325 INFO L125 PetriNetUnfolderBase]: For 35050/35053 co-relation queries the response was YES. [2024-06-03 20:46:49,349 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. [2024-06-03 20:46:49,382 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 106 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-06-03 20:46:49,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 136 transitions, 1169 flow [2024-06-03 20:46:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-03 20:46:49,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-03 20:46:49,384 INFO L175 Difference]: Start difference. First operand has 83 places, 97 transitions, 773 flow. Second operand 6 states and 183 transitions. [2024-06-03 20:46:49,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 136 transitions, 1169 flow [2024-06-03 20:46:49,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 136 transitions, 1117 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:49,442 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 807 flow [2024-06-03 20:46:49,442 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} [2024-06-03 20:46:49,443 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 33 predicate places. [2024-06-03 20:46:49,445 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 807 flow [2024-06-03 20:46:49,446 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) [2024-06-03 20:46:49,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:49,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:49,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:46:49,447 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)] === [2024-06-03 20:46:49,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:49,447 INFO L85 PathProgramCache]: Analyzing trace with hash 254108709, now seen corresponding path program 1 times [2024-06-03 20:46:49,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:49,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595083694] [2024-06-03 20:46:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:49,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:49,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:49,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595083694] [2024-06-03 20:46:49,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595083694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:49,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:49,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:49,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694952877] [2024-06-03 20:46:49,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:49,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:49,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:49,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:49,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:46:49,829 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) [2024-06-03 20:46:49,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:49,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:46:49,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:50,622 INFO L124 PetriNetUnfolderBase]: 4964/7334 cut-off events. [2024-06-03 20:46:50,623 INFO L125 PetriNetUnfolderBase]: For 39370/39373 co-relation queries the response was YES. [2024-06-03 20:46:50,654 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. [2024-06-03 20:46:50,693 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 106 selfloop transitions, 28 changer transitions 0/142 dead transitions. [2024-06-03 20:46:50,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 142 transitions, 1238 flow [2024-06-03 20:46:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-03 20:46:50,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-03 20:46:50,695 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 807 flow. Second operand 6 states and 185 transitions. [2024-06-03 20:46:50,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 142 transitions, 1238 flow [2024-06-03 20:46:50,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 142 transitions, 1182 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:50,754 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 863 flow [2024-06-03 20:46:50,754 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} [2024-06-03 20:46:50,755 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 35 predicate places. [2024-06-03 20:46:50,755 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 863 flow [2024-06-03 20:46:50,755 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) [2024-06-03 20:46:50,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:50,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:50,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:46:50,756 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)] === [2024-06-03 20:46:50,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1189371272, now seen corresponding path program 1 times [2024-06-03 20:46:50,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:50,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779857377] [2024-06-03 20:46:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:50,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:51,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:51,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779857377] [2024-06-03 20:46:51,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779857377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:51,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:51,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:46:51,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995427743] [2024-06-03 20:46:51,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:51,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:46:51,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:51,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:46:51,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:46:51,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 20:46:51,096 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) [2024-06-03 20:46:51,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:51,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 20:46:51,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:51,699 INFO L124 PetriNetUnfolderBase]: 4564/6784 cut-off events. [2024-06-03 20:46:51,699 INFO L125 PetriNetUnfolderBase]: For 45681/45713 co-relation queries the response was YES. [2024-06-03 20:46:51,721 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. [2024-06-03 20:46:51,758 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 102 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2024-06-03 20:46:51,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 133 transitions, 1266 flow [2024-06-03 20:46:51,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:51,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-03 20:46:51,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-03 20:46:51,760 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 863 flow. Second operand 5 states and 151 transitions. [2024-06-03 20:46:51,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 133 transitions, 1266 flow [2024-06-03 20:46:51,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 1205 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:51,832 INFO L231 Difference]: Finished difference. Result has 92 places, 112 transitions, 994 flow [2024-06-03 20:46:51,832 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} [2024-06-03 20:46:51,833 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-06-03 20:46:51,833 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 112 transitions, 994 flow [2024-06-03 20:46:51,833 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) [2024-06-03 20:46:51,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:51,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:51,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:46:51,834 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)] === [2024-06-03 20:46:51,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1116191325, now seen corresponding path program 1 times [2024-06-03 20:46:51,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:51,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765928297] [2024-06-03 20:46:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:51,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:52,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:52,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765928297] [2024-06-03 20:46:52,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765928297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:52,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:52,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:52,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781374433] [2024-06-03 20:46:52,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:52,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:52,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:52,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:52,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:52,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 20:46:52,268 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) [2024-06-03 20:46:52,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:52,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 20:46:52,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:53,050 INFO L124 PetriNetUnfolderBase]: 4770/7121 cut-off events. [2024-06-03 20:46:53,050 INFO L125 PetriNetUnfolderBase]: For 47776/47794 co-relation queries the response was YES. [2024-06-03 20:46:53,080 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. [2024-06-03 20:46:53,110 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 95 selfloop transitions, 38 changer transitions 0/149 dead transitions. [2024-06-03 20:46:53,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 149 transitions, 1492 flow [2024-06-03 20:46:53,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-03 20:46:53,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-06-03 20:46:53,112 INFO L175 Difference]: Start difference. First operand has 92 places, 112 transitions, 994 flow. Second operand 6 states and 178 transitions. [2024-06-03 20:46:53,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 149 transitions, 1492 flow [2024-06-03 20:46:53,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1450 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-03 20:46:53,206 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 1180 flow [2024-06-03 20:46:53,206 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} [2024-06-03 20:46:53,207 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 46 predicate places. [2024-06-03 20:46:53,207 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 1180 flow [2024-06-03 20:46:53,207 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) [2024-06-03 20:46:53,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:53,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:53,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:46:53,208 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)] === [2024-06-03 20:46:53,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:53,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1094420563, now seen corresponding path program 1 times [2024-06-03 20:46:53,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:53,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306321888] [2024-06-03 20:46:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:53,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:53,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:53,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306321888] [2024-06-03 20:46:53,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306321888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:53,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:53,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896499913] [2024-06-03 20:46:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:53,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:46:53,599 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) [2024-06-03 20:46:53,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:53,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:46:53,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:54,497 INFO L124 PetriNetUnfolderBase]: 5130/7653 cut-off events. [2024-06-03 20:46:54,498 INFO L125 PetriNetUnfolderBase]: For 63055/63082 co-relation queries the response was YES. [2024-06-03 20:46:54,524 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. [2024-06-03 20:46:54,558 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 142 selfloop transitions, 47 changer transitions 0/197 dead transitions. [2024-06-03 20:46:54,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 197 transitions, 2081 flow [2024-06-03 20:46:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:46:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:46:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 259 transitions. [2024-06-03 20:46:54,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755555555555556 [2024-06-03 20:46:54,560 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 1180 flow. Second operand 9 states and 259 transitions. [2024-06-03 20:46:54,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 197 transitions, 2081 flow [2024-06-03 20:46:54,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 197 transitions, 2016 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-03 20:46:54,644 INFO L231 Difference]: Finished difference. Result has 110 places, 151 transitions, 1516 flow [2024-06-03 20:46:54,645 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} [2024-06-03 20:46:54,645 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 57 predicate places. [2024-06-03 20:46:54,645 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 151 transitions, 1516 flow [2024-06-03 20:46:54,646 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) [2024-06-03 20:46:54,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:54,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:46:54,646 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)] === [2024-06-03 20:46:54,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:54,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1116017973, now seen corresponding path program 2 times [2024-06-03 20:46:54,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:54,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505214119] [2024-06-03 20:46:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:54,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:55,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:55,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505214119] [2024-06-03 20:46:55,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505214119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:55,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:55,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:55,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060657403] [2024-06-03 20:46:55,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:55,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:55,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:55,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:55,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:55,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:46:55,089 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) [2024-06-03 20:46:55,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:55,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:46:55,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:56,096 INFO L124 PetriNetUnfolderBase]: 5358/7986 cut-off events. [2024-06-03 20:46:56,096 INFO L125 PetriNetUnfolderBase]: For 79272/79293 co-relation queries the response was YES. [2024-06-03 20:46:56,128 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. [2024-06-03 20:46:56,161 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 140 selfloop transitions, 64 changer transitions 0/212 dead transitions. [2024-06-03 20:46:56,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 212 transitions, 2500 flow [2024-06-03 20:46:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:56,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-03 20:46:56,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-03 20:46:56,162 INFO L175 Difference]: Start difference. First operand has 110 places, 151 transitions, 1516 flow. Second operand 6 states and 188 transitions. [2024-06-03 20:46:56,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 212 transitions, 2500 flow [2024-06-03 20:46:56,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 212 transitions, 2336 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:56,303 INFO L231 Difference]: Finished difference. Result has 113 places, 179 transitions, 1915 flow [2024-06-03 20:46:56,303 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} [2024-06-03 20:46:56,304 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 60 predicate places. [2024-06-03 20:46:56,304 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 179 transitions, 1915 flow [2024-06-03 20:46:56,304 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) [2024-06-03 20:46:56,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:56,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:56,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:46:56,304 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)] === [2024-06-03 20:46:56,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:56,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1115810583, now seen corresponding path program 3 times [2024-06-03 20:46:56,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:56,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509240196] [2024-06-03 20:46:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:56,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:56,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:56,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509240196] [2024-06-03 20:46:56,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509240196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:56,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:56,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147332263] [2024-06-03 20:46:56,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:56,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:56,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:56,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:46:56,704 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) [2024-06-03 20:46:56,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:56,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:46:56,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:57,642 INFO L124 PetriNetUnfolderBase]: 5367/8006 cut-off events. [2024-06-03 20:46:57,643 INFO L125 PetriNetUnfolderBase]: For 93345/93366 co-relation queries the response was YES. [2024-06-03 20:46:57,674 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. [2024-06-03 20:46:57,707 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 142 selfloop transitions, 76 changer transitions 0/226 dead transitions. [2024-06-03 20:46:57,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 226 transitions, 2684 flow [2024-06-03 20:46:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:46:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:46:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-03 20:46:57,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-03 20:46:57,709 INFO L175 Difference]: Start difference. First operand has 113 places, 179 transitions, 1915 flow. Second operand 8 states and 237 transitions. [2024-06-03 20:46:57,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 226 transitions, 2684 flow [2024-06-03 20:46:57,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 226 transitions, 2567 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:57,879 INFO L231 Difference]: Finished difference. Result has 119 places, 189 transitions, 2094 flow [2024-06-03 20:46:57,879 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} [2024-06-03 20:46:57,880 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 66 predicate places. [2024-06-03 20:46:57,880 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 189 transitions, 2094 flow [2024-06-03 20:46:57,880 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) [2024-06-03 20:46:57,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:57,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:57,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:46:57,881 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)] === [2024-06-03 20:46:57,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1115802647, now seen corresponding path program 1 times [2024-06-03 20:46:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:57,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455332457] [2024-06-03 20:46:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:58,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:58,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455332457] [2024-06-03 20:46:58,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455332457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:58,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:58,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:58,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594968157] [2024-06-03 20:46:58,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:58,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:58,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:58,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:58,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 20:46:58,312 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) [2024-06-03 20:46:58,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:58,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 20:46:58,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:59,205 INFO L124 PetriNetUnfolderBase]: 5583/8355 cut-off events. [2024-06-03 20:46:59,205 INFO L125 PetriNetUnfolderBase]: For 110088/110132 co-relation queries the response was YES. [2024-06-03 20:46:59,257 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. [2024-06-03 20:46:59,298 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 161 selfloop transitions, 34 changer transitions 0/220 dead transitions. [2024-06-03 20:46:59,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 220 transitions, 2684 flow [2024-06-03 20:46:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-03 20:46:59,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-03 20:46:59,299 INFO L175 Difference]: Start difference. First operand has 119 places, 189 transitions, 2094 flow. Second operand 6 states and 181 transitions. [2024-06-03 20:46:59,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 220 transitions, 2684 flow [2024-06-03 20:46:59,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 220 transitions, 2484 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:46:59,421 INFO L231 Difference]: Finished difference. Result has 119 places, 192 transitions, 2032 flow [2024-06-03 20:46:59,421 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} [2024-06-03 20:46:59,422 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 66 predicate places. [2024-06-03 20:46:59,422 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 192 transitions, 2032 flow [2024-06-03 20:46:59,422 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) [2024-06-03 20:46:59,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:59,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:59,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:46:59,423 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)] === [2024-06-03 20:46:59,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1904061804, now seen corresponding path program 1 times [2024-06-03 20:46:59,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:59,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003867291] [2024-06-03 20:46:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:59,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:59,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003867291] [2024-06-03 20:46:59,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003867291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:59,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:59,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:59,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909170260] [2024-06-03 20:46:59,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:59,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:59,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:59,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:59,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:59,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-03 20:46:59,824 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) [2024-06-03 20:46:59,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:59,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-03 20:46:59,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:00,690 INFO L124 PetriNetUnfolderBase]: 5187/7758 cut-off events. [2024-06-03 20:47:00,690 INFO L125 PetriNetUnfolderBase]: For 117840/118080 co-relation queries the response was YES. [2024-06-03 20:47:00,727 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. [2024-06-03 20:47:00,761 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 136 selfloop transitions, 31 changer transitions 0/208 dead transitions. [2024-06-03 20:47:00,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 208 transitions, 2420 flow [2024-06-03 20:47:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-03 20:47:00,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-03 20:47:00,763 INFO L175 Difference]: Start difference. First operand has 119 places, 192 transitions, 2032 flow. Second operand 5 states and 151 transitions. [2024-06-03 20:47:00,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 208 transitions, 2420 flow [2024-06-03 20:47:01,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 208 transitions, 2310 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:01,073 INFO L231 Difference]: Finished difference. Result has 120 places, 192 transitions, 2000 flow [2024-06-03 20:47:01,074 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} [2024-06-03 20:47:01,074 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 67 predicate places. [2024-06-03 20:47:01,074 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 192 transitions, 2000 flow [2024-06-03 20:47:01,075 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) [2024-06-03 20:47:01,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:01,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:01,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:47:01,075 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)] === [2024-06-03 20:47:01,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash 521689447, now seen corresponding path program 1 times [2024-06-03 20:47:01,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:01,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325319589] [2024-06-03 20:47:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:01,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:01,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:01,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325319589] [2024-06-03 20:47:01,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325319589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:01,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:01,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:01,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291465444] [2024-06-03 20:47:01,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:01,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:01,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:01,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:01,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 20:47:01,452 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) [2024-06-03 20:47:01,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:01,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 20:47:01,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:02,330 INFO L124 PetriNetUnfolderBase]: 5465/8076 cut-off events. [2024-06-03 20:47:02,330 INFO L125 PetriNetUnfolderBase]: For 122641/123013 co-relation queries the response was YES. [2024-06-03 20:47:02,369 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. [2024-06-03 20:47:02,406 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 178 selfloop transitions, 36 changer transitions 0/232 dead transitions. [2024-06-03 20:47:02,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 232 transitions, 2734 flow [2024-06-03 20:47:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:02,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-03 20:47:02,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2024-06-03 20:47:02,411 INFO L175 Difference]: Start difference. First operand has 120 places, 192 transitions, 2000 flow. Second operand 6 states and 182 transitions. [2024-06-03 20:47:02,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 232 transitions, 2734 flow [2024-06-03 20:47:02,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 232 transitions, 2672 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:02,557 INFO L231 Difference]: Finished difference. Result has 123 places, 200 transitions, 2202 flow [2024-06-03 20:47:02,558 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} [2024-06-03 20:47:02,558 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 70 predicate places. [2024-06-03 20:47:02,558 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 200 transitions, 2202 flow [2024-06-03 20:47:02,558 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) [2024-06-03 20:47:02,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:02,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:02,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:47:02,559 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)] === [2024-06-03 20:47:02,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:02,560 INFO L85 PathProgramCache]: Analyzing trace with hash 432697851, now seen corresponding path program 2 times [2024-06-03 20:47:02,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:02,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556156135] [2024-06-03 20:47:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:02,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:02,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:02,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556156135] [2024-06-03 20:47:02,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556156135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:02,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:02,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:02,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412173711] [2024-06-03 20:47:02,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:02,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:02,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:02,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:02,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 20:47:02,926 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) [2024-06-03 20:47:02,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:02,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 20:47:02,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:03,802 INFO L124 PetriNetUnfolderBase]: 5443/8038 cut-off events. [2024-06-03 20:47:03,803 INFO L125 PetriNetUnfolderBase]: For 135923/136279 co-relation queries the response was YES. [2024-06-03 20:47:03,840 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. [2024-06-03 20:47:03,874 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 179 selfloop transitions, 29 changer transitions 0/226 dead transitions. [2024-06-03 20:47:03,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 226 transitions, 2684 flow [2024-06-03 20:47:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-03 20:47:03,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-06-03 20:47:03,876 INFO L175 Difference]: Start difference. First operand has 123 places, 200 transitions, 2202 flow. Second operand 6 states and 176 transitions. [2024-06-03 20:47:03,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 226 transitions, 2684 flow [2024-06-03 20:47:04,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 226 transitions, 2564 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:04,067 INFO L231 Difference]: Finished difference. Result has 127 places, 200 transitions, 2148 flow [2024-06-03 20:47:04,070 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} [2024-06-03 20:47:04,072 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 74 predicate places. [2024-06-03 20:47:04,072 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 200 transitions, 2148 flow [2024-06-03 20:47:04,072 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) [2024-06-03 20:47:04,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:04,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:04,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:47:04,073 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)] === [2024-06-03 20:47:04,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:04,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1028030029, now seen corresponding path program 1 times [2024-06-03 20:47:04,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:04,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042850904] [2024-06-03 20:47:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:04,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:04,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:04,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042850904] [2024-06-03 20:47:04,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042850904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:04,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:04,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:04,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367351490] [2024-06-03 20:47:04,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:04,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:04,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:04,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:04,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:04,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:04,403 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) [2024-06-03 20:47:04,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:04,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:04,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:05,368 INFO L124 PetriNetUnfolderBase]: 5682/8379 cut-off events. [2024-06-03 20:47:05,368 INFO L125 PetriNetUnfolderBase]: For 134437/134458 co-relation queries the response was YES. [2024-06-03 20:47:05,399 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. [2024-06-03 20:47:05,434 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 176 selfloop transitions, 43 changer transitions 0/227 dead transitions. [2024-06-03 20:47:05,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 227 transitions, 2752 flow [2024-06-03 20:47:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-03 20:47:05,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.612 [2024-06-03 20:47:05,435 INFO L175 Difference]: Start difference. First operand has 127 places, 200 transitions, 2148 flow. Second operand 5 states and 153 transitions. [2024-06-03 20:47:05,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 227 transitions, 2752 flow [2024-06-03 20:47:05,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 227 transitions, 2688 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:05,600 INFO L231 Difference]: Finished difference. Result has 128 places, 204 transitions, 2273 flow [2024-06-03 20:47:05,600 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} [2024-06-03 20:47:05,601 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 75 predicate places. [2024-06-03 20:47:05,601 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 204 transitions, 2273 flow [2024-06-03 20:47:05,601 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) [2024-06-03 20:47:05,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:05,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:05,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:47:05,601 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)] === [2024-06-03 20:47:05,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:05,602 INFO L85 PathProgramCache]: Analyzing trace with hash -912479389, now seen corresponding path program 2 times [2024-06-03 20:47:05,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:05,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081571481] [2024-06-03 20:47:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:05,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:05,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:05,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081571481] [2024-06-03 20:47:05,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081571481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:05,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:05,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:05,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545255530] [2024-06-03 20:47:05,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:05,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:05,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:05,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:05,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:05,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:05,952 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) [2024-06-03 20:47:05,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:05,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:05,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:06,857 INFO L124 PetriNetUnfolderBase]: 5698/8461 cut-off events. [2024-06-03 20:47:06,857 INFO L125 PetriNetUnfolderBase]: For 150629/150650 co-relation queries the response was YES. [2024-06-03 20:47:06,907 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. [2024-06-03 20:47:06,948 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 184 selfloop transitions, 52 changer transitions 0/244 dead transitions. [2024-06-03 20:47:06,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 244 transitions, 3107 flow [2024-06-03 20:47:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-03 20:47:06,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-03 20:47:06,949 INFO L175 Difference]: Start difference. First operand has 128 places, 204 transitions, 2273 flow. Second operand 6 states and 181 transitions. [2024-06-03 20:47:06,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 244 transitions, 3107 flow [2024-06-03 20:47:07,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 244 transitions, 2984 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:07,218 INFO L231 Difference]: Finished difference. Result has 131 places, 212 transitions, 2447 flow [2024-06-03 20:47:07,219 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} [2024-06-03 20:47:07,219 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 78 predicate places. [2024-06-03 20:47:07,219 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 212 transitions, 2447 flow [2024-06-03 20:47:07,219 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) [2024-06-03 20:47:07,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:07,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:07,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:47:07,219 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)] === [2024-06-03 20:47:07,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:07,220 INFO L85 PathProgramCache]: Analyzing trace with hash -912470089, now seen corresponding path program 3 times [2024-06-03 20:47:07,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:07,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622475053] [2024-06-03 20:47:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:07,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:07,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:07,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622475053] [2024-06-03 20:47:07,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622475053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:07,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:07,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:07,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859361158] [2024-06-03 20:47:07,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:07,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:07,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:07,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:07,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:07,612 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) [2024-06-03 20:47:07,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:07,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:07,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:08,725 INFO L124 PetriNetUnfolderBase]: 5714/8487 cut-off events. [2024-06-03 20:47:08,725 INFO L125 PetriNetUnfolderBase]: For 167290/167311 co-relation queries the response was YES. [2024-06-03 20:47:08,775 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. [2024-06-03 20:47:08,831 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 182 selfloop transitions, 55 changer transitions 0/245 dead transitions. [2024-06-03 20:47:08,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 245 transitions, 3199 flow [2024-06-03 20:47:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-03 20:47:08,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-06-03 20:47:08,833 INFO L175 Difference]: Start difference. First operand has 131 places, 212 transitions, 2447 flow. Second operand 6 states and 179 transitions. [2024-06-03 20:47:08,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 245 transitions, 3199 flow [2024-06-03 20:47:09,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 245 transitions, 3027 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:09,124 INFO L231 Difference]: Finished difference. Result has 135 places, 216 transitions, 2490 flow [2024-06-03 20:47:09,124 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} [2024-06-03 20:47:09,125 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 82 predicate places. [2024-06-03 20:47:09,125 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 216 transitions, 2490 flow [2024-06-03 20:47:09,125 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) [2024-06-03 20:47:09,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:09,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:09,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:47:09,126 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)] === [2024-06-03 20:47:09,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash -934067499, now seen corresponding path program 4 times [2024-06-03 20:47:09,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:09,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330237788] [2024-06-03 20:47:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:09,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:09,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330237788] [2024-06-03 20:47:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330237788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:09,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:09,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:09,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690106932] [2024-06-03 20:47:09,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:09,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:09,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:09,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:09,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:09,499 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) [2024-06-03 20:47:09,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:09,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:09,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:10,541 INFO L124 PetriNetUnfolderBase]: 5707/8478 cut-off events. [2024-06-03 20:47:10,541 INFO L125 PetriNetUnfolderBase]: For 174556/174577 co-relation queries the response was YES. [2024-06-03 20:47:10,587 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. [2024-06-03 20:47:10,628 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 190 selfloop transitions, 43 changer transitions 0/241 dead transitions. [2024-06-03 20:47:10,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 241 transitions, 3034 flow [2024-06-03 20:47:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-03 20:47:10,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-03 20:47:10,630 INFO L175 Difference]: Start difference. First operand has 135 places, 216 transitions, 2490 flow. Second operand 5 states and 155 transitions. [2024-06-03 20:47:10,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 241 transitions, 3034 flow [2024-06-03 20:47:10,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 241 transitions, 2853 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:10,959 INFO L231 Difference]: Finished difference. Result has 137 places, 216 transitions, 2411 flow [2024-06-03 20:47:10,959 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} [2024-06-03 20:47:10,960 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 84 predicate places. [2024-06-03 20:47:10,960 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 216 transitions, 2411 flow [2024-06-03 20:47:10,960 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) [2024-06-03 20:47:10,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:10,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:10,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:47:10,961 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)] === [2024-06-03 20:47:10,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash -349029910, now seen corresponding path program 1 times [2024-06-03 20:47:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:10,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492101461] [2024-06-03 20:47:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:10,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:11,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:11,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492101461] [2024-06-03 20:47:11,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492101461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:11,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:11,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:11,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536089272] [2024-06-03 20:47:11,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:11,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:11,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:11,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:11,348 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) [2024-06-03 20:47:11,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:11,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:11,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:12,340 INFO L124 PetriNetUnfolderBase]: 5766/8594 cut-off events. [2024-06-03 20:47:12,340 INFO L125 PetriNetUnfolderBase]: For 182405/182432 co-relation queries the response was YES. [2024-06-03 20:47:12,387 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. [2024-06-03 20:47:12,430 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 201 selfloop transitions, 91 changer transitions 0/300 dead transitions. [2024-06-03 20:47:12,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 300 transitions, 3869 flow [2024-06-03 20:47:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-06-03 20:47:12,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-03 20:47:12,432 INFO L175 Difference]: Start difference. First operand has 137 places, 216 transitions, 2411 flow. Second operand 10 states and 285 transitions. [2024-06-03 20:47:12,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 300 transitions, 3869 flow [2024-06-03 20:47:12,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 300 transitions, 3748 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:12,669 INFO L231 Difference]: Finished difference. Result has 145 places, 245 transitions, 2926 flow [2024-06-03 20:47:12,669 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} [2024-06-03 20:47:12,670 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 92 predicate places. [2024-06-03 20:47:12,670 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 245 transitions, 2926 flow [2024-06-03 20:47:12,670 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) [2024-06-03 20:47:12,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:12,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:12,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:47:12,671 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)] === [2024-06-03 20:47:12,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1248212812, now seen corresponding path program 2 times [2024-06-03 20:47:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:12,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441805224] [2024-06-03 20:47:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:12,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:12,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:12,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441805224] [2024-06-03 20:47:12,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441805224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:12,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:12,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:12,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164036525] [2024-06-03 20:47:12,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:12,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:12,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:12,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:12,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:13,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:13,033 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) [2024-06-03 20:47:13,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:13,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:13,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:14,126 INFO L124 PetriNetUnfolderBase]: 5769/8580 cut-off events. [2024-06-03 20:47:14,126 INFO L125 PetriNetUnfolderBase]: For 205984/206005 co-relation queries the response was YES. [2024-06-03 20:47:14,171 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. [2024-06-03 20:47:14,212 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 227 selfloop transitions, 49 changer transitions 0/284 dead transitions. [2024-06-03 20:47:14,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 284 transitions, 3772 flow [2024-06-03 20:47:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-03 20:47:14,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5828571428571429 [2024-06-03 20:47:14,213 INFO L175 Difference]: Start difference. First operand has 145 places, 245 transitions, 2926 flow. Second operand 7 states and 204 transitions. [2024-06-03 20:47:14,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 284 transitions, 3772 flow [2024-06-03 20:47:14,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 284 transitions, 3602 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:14,699 INFO L231 Difference]: Finished difference. Result has 150 places, 253 transitions, 3032 flow [2024-06-03 20:47:14,700 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} [2024-06-03 20:47:14,700 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 97 predicate places. [2024-06-03 20:47:14,700 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 253 transitions, 3032 flow [2024-06-03 20:47:14,700 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) [2024-06-03 20:47:14,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:14,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:14,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:47:14,701 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)] === [2024-06-03 20:47:14,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:14,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1442186632, now seen corresponding path program 3 times [2024-06-03 20:47:14,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:14,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553401360] [2024-06-03 20:47:14,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:14,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:14,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:14,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553401360] [2024-06-03 20:47:14,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553401360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:14,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:14,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:14,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339158298] [2024-06-03 20:47:14,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:14,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:14,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:14,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:14,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:15,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:15,044 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) [2024-06-03 20:47:15,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:15,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:15,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:16,149 INFO L124 PetriNetUnfolderBase]: 5881/8770 cut-off events. [2024-06-03 20:47:16,150 INFO L125 PetriNetUnfolderBase]: For 221007/221028 co-relation queries the response was YES. [2024-06-03 20:47:16,196 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. [2024-06-03 20:47:16,238 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 176 selfloop transitions, 146 changer transitions 0/330 dead transitions. [2024-06-03 20:47:16,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 330 transitions, 4608 flow [2024-06-03 20:47:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-06-03 20:47:16,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582 [2024-06-03 20:47:16,240 INFO L175 Difference]: Start difference. First operand has 150 places, 253 transitions, 3032 flow. Second operand 10 states and 291 transitions. [2024-06-03 20:47:16,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 330 transitions, 4608 flow [2024-06-03 20:47:16,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 330 transitions, 4426 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:16,741 INFO L231 Difference]: Finished difference. Result has 158 places, 281 transitions, 3678 flow [2024-06-03 20:47:16,741 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} [2024-06-03 20:47:16,741 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 105 predicate places. [2024-06-03 20:47:16,742 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 281 transitions, 3678 flow [2024-06-03 20:47:16,742 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) [2024-06-03 20:47:16,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:16,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:16,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:47:16,742 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)] === [2024-06-03 20:47:16,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:16,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1447900552, now seen corresponding path program 4 times [2024-06-03 20:47:16,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:16,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257377264] [2024-06-03 20:47:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:16,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:17,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:17,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257377264] [2024-06-03 20:47:17,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257377264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:17,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:17,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:17,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001185284] [2024-06-03 20:47:17,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:17,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:17,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:17,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:17,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:17,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:17,104 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) [2024-06-03 20:47:17,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:17,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:17,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:18,327 INFO L124 PetriNetUnfolderBase]: 5926/8834 cut-off events. [2024-06-03 20:47:18,327 INFO L125 PetriNetUnfolderBase]: For 246063/246078 co-relation queries the response was YES. [2024-06-03 20:47:18,375 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. [2024-06-03 20:47:18,418 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 173 selfloop transitions, 157 changer transitions 0/338 dead transitions. [2024-06-03 20:47:18,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 338 transitions, 5036 flow [2024-06-03 20:47:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2024-06-03 20:47:18,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911111111111111 [2024-06-03 20:47:18,420 INFO L175 Difference]: Start difference. First operand has 158 places, 281 transitions, 3678 flow. Second operand 9 states and 266 transitions. [2024-06-03 20:47:18,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 338 transitions, 5036 flow [2024-06-03 20:47:18,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 338 transitions, 4762 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:18,934 INFO L231 Difference]: Finished difference. Result has 163 places, 294 transitions, 3951 flow [2024-06-03 20:47:18,934 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} [2024-06-03 20:47:18,934 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 110 predicate places. [2024-06-03 20:47:18,935 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 294 transitions, 3951 flow [2024-06-03 20:47:18,935 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) [2024-06-03 20:47:18,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:18,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:18,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:47:18,935 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)] === [2024-06-03 20:47:18,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:18,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1248598762, now seen corresponding path program 5 times [2024-06-03 20:47:18,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:18,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737644547] [2024-06-03 20:47:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:18,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737644547] [2024-06-03 20:47:19,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737644547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:19,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:19,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476213339] [2024-06-03 20:47:19,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:19,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:19,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:19,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:19,304 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) [2024-06-03 20:47:19,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:19,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:19,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:20,363 INFO L124 PetriNetUnfolderBase]: 5918/8824 cut-off events. [2024-06-03 20:47:20,363 INFO L125 PetriNetUnfolderBase]: For 247227/247242 co-relation queries the response was YES. [2024-06-03 20:47:20,413 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. [2024-06-03 20:47:20,456 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 170 selfloop transitions, 150 changer transitions 0/328 dead transitions. [2024-06-03 20:47:20,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 328 transitions, 4873 flow [2024-06-03 20:47:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-03 20:47:20,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085714285714285 [2024-06-03 20:47:20,457 INFO L175 Difference]: Start difference. First operand has 163 places, 294 transitions, 3951 flow. Second operand 7 states and 213 transitions. [2024-06-03 20:47:20,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 328 transitions, 4873 flow [2024-06-03 20:47:21,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 328 transitions, 4539 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:21,046 INFO L231 Difference]: Finished difference. Result has 165 places, 294 transitions, 3927 flow [2024-06-03 20:47:21,046 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} [2024-06-03 20:47:21,047 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 112 predicate places. [2024-06-03 20:47:21,047 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 294 transitions, 3927 flow [2024-06-03 20:47:21,047 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) [2024-06-03 20:47:21,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:21,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:21,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:47:21,048 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)] === [2024-06-03 20:47:21,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1442194568, now seen corresponding path program 1 times [2024-06-03 20:47:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:21,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770048215] [2024-06-03 20:47:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:21,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:21,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:21,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770048215] [2024-06-03 20:47:21,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770048215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:21,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:21,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:21,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086375224] [2024-06-03 20:47:21,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:21,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:21,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:21,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:21,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 20:47:21,448 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) [2024-06-03 20:47:21,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:21,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 20:47:21,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:22,553 INFO L124 PetriNetUnfolderBase]: 6011/9004 cut-off events. [2024-06-03 20:47:22,554 INFO L125 PetriNetUnfolderBase]: For 281508/281538 co-relation queries the response was YES. [2024-06-03 20:47:22,608 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. [2024-06-03 20:47:22,654 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 236 selfloop transitions, 55 changer transitions 0/329 dead transitions. [2024-06-03 20:47:22,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 329 transitions, 4819 flow [2024-06-03 20:47:22,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-03 20:47:22,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914285714285714 [2024-06-03 20:47:22,655 INFO L175 Difference]: Start difference. First operand has 165 places, 294 transitions, 3927 flow. Second operand 7 states and 207 transitions. [2024-06-03 20:47:22,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 329 transitions, 4819 flow [2024-06-03 20:47:23,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 329 transitions, 4509 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:23,164 INFO L231 Difference]: Finished difference. Result has 166 places, 296 transitions, 3796 flow [2024-06-03 20:47:23,165 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} [2024-06-03 20:47:23,165 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 113 predicate places. [2024-06-03 20:47:23,165 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 296 transitions, 3796 flow [2024-06-03 20:47:23,165 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) [2024-06-03 20:47:23,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:23,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:23,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:47:23,166 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)] === [2024-06-03 20:47:23,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1455527048, now seen corresponding path program 2 times [2024-06-03 20:47:23,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:23,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389774111] [2024-06-03 20:47:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:23,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:23,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:23,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389774111] [2024-06-03 20:47:23,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389774111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:23,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:23,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:23,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670969889] [2024-06-03 20:47:23,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:23,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:23,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:23,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:23,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 20:47:23,558 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) [2024-06-03 20:47:23,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:23,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 20:47:23,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:24,862 INFO L124 PetriNetUnfolderBase]: 6412/9603 cut-off events. [2024-06-03 20:47:24,863 INFO L125 PetriNetUnfolderBase]: For 308965/308977 co-relation queries the response was YES. [2024-06-03 20:47:24,914 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. [2024-06-03 20:47:24,960 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 241 selfloop transitions, 60 changer transitions 0/339 dead transitions. [2024-06-03 20:47:24,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 339 transitions, 4830 flow [2024-06-03 20:47:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:24,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-03 20:47:24,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2024-06-03 20:47:24,961 INFO L175 Difference]: Start difference. First operand has 166 places, 296 transitions, 3796 flow. Second operand 7 states and 212 transitions. [2024-06-03 20:47:24,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 339 transitions, 4830 flow [2024-06-03 20:47:25,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 339 transitions, 4697 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:25,567 INFO L231 Difference]: Finished difference. Result has 168 places, 299 transitions, 3864 flow [2024-06-03 20:47:25,567 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} [2024-06-03 20:47:25,567 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 115 predicate places. [2024-06-03 20:47:25,568 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 299 transitions, 3864 flow [2024-06-03 20:47:25,568 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) [2024-06-03 20:47:25,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:25,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:25,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:47:25,568 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)] === [2024-06-03 20:47:25,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1170519957, now seen corresponding path program 1 times [2024-06-03 20:47:25,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:25,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282128430] [2024-06-03 20:47:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:25,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:25,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:25,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282128430] [2024-06-03 20:47:25,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282128430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:25,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:25,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508708106] [2024-06-03 20:47:25,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:25,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:25,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:25,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:25,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-03 20:47:25,918 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) [2024-06-03 20:47:25,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:25,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-03 20:47:25,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:27,231 INFO L124 PetriNetUnfolderBase]: 6164/9202 cut-off events. [2024-06-03 20:47:27,231 INFO L125 PetriNetUnfolderBase]: For 328827/329077 co-relation queries the response was YES. [2024-06-03 20:47:27,289 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. [2024-06-03 20:47:27,336 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 209 selfloop transitions, 60 changer transitions 0/325 dead transitions. [2024-06-03 20:47:27,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 325 transitions, 4684 flow [2024-06-03 20:47:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-03 20:47:27,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-03 20:47:27,338 INFO L175 Difference]: Start difference. First operand has 168 places, 299 transitions, 3864 flow. Second operand 6 states and 177 transitions. [2024-06-03 20:47:27,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 325 transitions, 4684 flow [2024-06-03 20:47:27,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 325 transitions, 4581 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:27,981 INFO L231 Difference]: Finished difference. Result has 171 places, 306 transitions, 3994 flow [2024-06-03 20:47:27,981 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} [2024-06-03 20:47:27,981 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 118 predicate places. [2024-06-03 20:47:27,981 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 306 transitions, 3994 flow [2024-06-03 20:47:27,982 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) [2024-06-03 20:47:27,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:27,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:27,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:47:27,982 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)] === [2024-06-03 20:47:27,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:27,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1007494462, now seen corresponding path program 1 times [2024-06-03 20:47:27,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:27,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104237870] [2024-06-03 20:47:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:27,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:28,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:28,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104237870] [2024-06-03 20:47:28,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104237870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:28,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:28,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:28,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710918843] [2024-06-03 20:47:28,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:28,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:28,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:28,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:28,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:28,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:28,351 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) [2024-06-03 20:47:28,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:28,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:28,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:29,951 INFO L124 PetriNetUnfolderBase]: 8539/12677 cut-off events. [2024-06-03 20:47:29,951 INFO L125 PetriNetUnfolderBase]: For 449127/449148 co-relation queries the response was YES. [2024-06-03 20:47:30,040 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. [2024-06-03 20:47:30,108 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 308 selfloop transitions, 83 changer transitions 0/399 dead transitions. [2024-06-03 20:47:30,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 399 transitions, 5808 flow [2024-06-03 20:47:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-06-03 20:47:30,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6177777777777778 [2024-06-03 20:47:30,110 INFO L175 Difference]: Start difference. First operand has 171 places, 306 transitions, 3994 flow. Second operand 9 states and 278 transitions. [2024-06-03 20:47:30,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 399 transitions, 5808 flow [2024-06-03 20:47:30,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 399 transitions, 5652 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:30,986 INFO L231 Difference]: Finished difference. Result has 178 places, 321 transitions, 4348 flow [2024-06-03 20:47:30,986 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} [2024-06-03 20:47:30,987 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 125 predicate places. [2024-06-03 20:47:30,987 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 321 transitions, 4348 flow [2024-06-03 20:47:30,987 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) [2024-06-03 20:47:30,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:30,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:30,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:47:30,987 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)] === [2024-06-03 20:47:30,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:30,988 INFO L85 PathProgramCache]: Analyzing trace with hash -918928702, now seen corresponding path program 2 times [2024-06-03 20:47:30,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:30,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368857075] [2024-06-03 20:47:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:30,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:31,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:31,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368857075] [2024-06-03 20:47:31,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368857075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:31,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:31,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:31,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207039395] [2024-06-03 20:47:31,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:31,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:31,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:31,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:31,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:31,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:31,339 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) [2024-06-03 20:47:31,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:31,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:31,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:33,333 INFO L124 PetriNetUnfolderBase]: 9839/14585 cut-off events. [2024-06-03 20:47:33,333 INFO L125 PetriNetUnfolderBase]: For 581466/581487 co-relation queries the response was YES. [2024-06-03 20:47:33,439 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. [2024-06-03 20:47:33,523 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 307 selfloop transitions, 80 changer transitions 0/395 dead transitions. [2024-06-03 20:47:33,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 395 transitions, 5943 flow [2024-06-03 20:47:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 296 transitions. [2024-06-03 20:47:33,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592 [2024-06-03 20:47:33,524 INFO L175 Difference]: Start difference. First operand has 178 places, 321 transitions, 4348 flow. Second operand 10 states and 296 transitions. [2024-06-03 20:47:33,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 395 transitions, 5943 flow [2024-06-03 20:47:34,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 395 transitions, 5752 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:34,970 INFO L231 Difference]: Finished difference. Result has 185 places, 328 transitions, 4520 flow [2024-06-03 20:47:34,971 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} [2024-06-03 20:47:34,971 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 132 predicate places. [2024-06-03 20:47:34,971 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 328 transitions, 4520 flow [2024-06-03 20:47:34,971 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) [2024-06-03 20:47:34,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:34,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:34,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:47:34,971 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)] === [2024-06-03 20:47:34,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:34,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1005616792, now seen corresponding path program 3 times [2024-06-03 20:47:34,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:34,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068844353] [2024-06-03 20:47:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:34,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:35,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:35,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068844353] [2024-06-03 20:47:35,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068844353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:35,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:35,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:35,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061012104] [2024-06-03 20:47:35,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:35,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:35,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:35,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:35,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:35,354 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) [2024-06-03 20:47:35,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:35,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:35,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:37,610 INFO L124 PetriNetUnfolderBase]: 10109/14979 cut-off events. [2024-06-03 20:47:37,611 INFO L125 PetriNetUnfolderBase]: For 594990/595011 co-relation queries the response was YES. [2024-06-03 20:47:37,738 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. [2024-06-03 20:47:37,824 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 300 selfloop transitions, 77 changer transitions 0/385 dead transitions. [2024-06-03 20:47:37,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 385 transitions, 5777 flow [2024-06-03 20:47:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 286 transitions. [2024-06-03 20:47:37,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-06-03 20:47:37,826 INFO L175 Difference]: Start difference. First operand has 185 places, 328 transitions, 4520 flow. Second operand 10 states and 286 transitions. [2024-06-03 20:47:37,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 385 transitions, 5777 flow [2024-06-03 20:47:39,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 385 transitions, 5590 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:39,336 INFO L231 Difference]: Finished difference. Result has 189 places, 331 transitions, 4595 flow [2024-06-03 20:47:39,337 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} [2024-06-03 20:47:39,337 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-06-03 20:47:39,337 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 331 transitions, 4595 flow [2024-06-03 20:47:39,337 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) [2024-06-03 20:47:39,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:39,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:39,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:47:39,338 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)] === [2024-06-03 20:47:39,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:39,338 INFO L85 PathProgramCache]: Analyzing trace with hash 794586155, now seen corresponding path program 1 times [2024-06-03 20:47:39,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:39,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565915910] [2024-06-03 20:47:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:39,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:39,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:39,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565915910] [2024-06-03 20:47:39,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565915910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:39,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:39,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:39,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931453829] [2024-06-03 20:47:39,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:39,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:39,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:40,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:40,002 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) [2024-06-03 20:47:40,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:40,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:40,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:42,912 INFO L124 PetriNetUnfolderBase]: 10119/15010 cut-off events. [2024-06-03 20:47:42,912 INFO L125 PetriNetUnfolderBase]: For 552098/552107 co-relation queries the response was YES. [2024-06-03 20:47:43,004 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. [2024-06-03 20:47:43,172 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 331 selfloop transitions, 32 changer transitions 0/371 dead transitions. [2024-06-03 20:47:43,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 371 transitions, 5828 flow [2024-06-03 20:47:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-03 20:47:43,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-03 20:47:43,176 INFO L175 Difference]: Start difference. First operand has 189 places, 331 transitions, 4595 flow. Second operand 7 states and 189 transitions. [2024-06-03 20:47:43,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 371 transitions, 5828 flow [2024-06-03 20:47:44,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 371 transitions, 5594 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:44,433 INFO L231 Difference]: Finished difference. Result has 189 places, 348 transitions, 4826 flow [2024-06-03 20:47:44,434 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} [2024-06-03 20:47:44,434 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-06-03 20:47:44,434 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 348 transitions, 4826 flow [2024-06-03 20:47:44,434 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) [2024-06-03 20:47:44,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:44,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:44,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:47:44,435 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)] === [2024-06-03 20:47:44,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash 847087850, now seen corresponding path program 4 times [2024-06-03 20:47:44,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:44,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433582687] [2024-06-03 20:47:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:44,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:44,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:44,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433582687] [2024-06-03 20:47:44,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433582687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:44,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:44,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:44,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442754222] [2024-06-03 20:47:44,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:44,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:44,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:44,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:44,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:44,881 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) [2024-06-03 20:47:44,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:44,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:44,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:47,823 INFO L124 PetriNetUnfolderBase]: 11196/16559 cut-off events. [2024-06-03 20:47:47,823 INFO L125 PetriNetUnfolderBase]: For 731638/731653 co-relation queries the response was YES. [2024-06-03 20:47:47,931 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. [2024-06-03 20:47:48,013 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 298 selfloop transitions, 90 changer transitions 1/397 dead transitions. [2024-06-03 20:47:48,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 397 transitions, 5984 flow [2024-06-03 20:47:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2024-06-03 20:47:48,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-06-03 20:47:48,015 INFO L175 Difference]: Start difference. First operand has 189 places, 348 transitions, 4826 flow. Second operand 9 states and 267 transitions. [2024-06-03 20:47:48,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 397 transitions, 5984 flow [2024-06-03 20:47:49,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 397 transitions, 5896 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:49,381 INFO L231 Difference]: Finished difference. Result has 196 places, 350 transitions, 5018 flow [2024-06-03 20:47:49,381 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} [2024-06-03 20:47:49,381 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 143 predicate places. [2024-06-03 20:47:49,381 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 350 transitions, 5018 flow [2024-06-03 20:47:49,382 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) [2024-06-03 20:47:49,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:49,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:49,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:47:49,382 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)] === [2024-06-03 20:47:49,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:49,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1704651274, now seen corresponding path program 5 times [2024-06-03 20:47:49,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:49,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23526495] [2024-06-03 20:47:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:49,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:49,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23526495] [2024-06-03 20:47:49,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23526495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:49,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:49,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:49,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160715181] [2024-06-03 20:47:49,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:49,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:49,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:49,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:49,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:49,854 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) [2024-06-03 20:47:49,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:49,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:49,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:53,217 INFO L124 PetriNetUnfolderBase]: 12454/18409 cut-off events. [2024-06-03 20:47:53,217 INFO L125 PetriNetUnfolderBase]: For 816274/816289 co-relation queries the response was YES. [2024-06-03 20:47:53,344 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. [2024-06-03 20:47:53,448 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 298 selfloop transitions, 87 changer transitions 0/393 dead transitions. [2024-06-03 20:47:53,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 393 transitions, 6146 flow [2024-06-03 20:47:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-03 20:47:53,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-03 20:47:53,449 INFO L175 Difference]: Start difference. First operand has 196 places, 350 transitions, 5018 flow. Second operand 7 states and 217 transitions. [2024-06-03 20:47:53,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 393 transitions, 6146 flow [2024-06-03 20:47:55,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 393 transitions, 5913 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:55,343 INFO L231 Difference]: Finished difference. Result has 196 places, 353 transitions, 5077 flow [2024-06-03 20:47:55,343 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} [2024-06-03 20:47:55,343 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 143 predicate places. [2024-06-03 20:47:55,343 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 353 transitions, 5077 flow [2024-06-03 20:47:55,343 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) [2024-06-03 20:47:55,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:55,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:55,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:47:55,344 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)] === [2024-06-03 20:47:55,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:55,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1704647554, now seen corresponding path program 6 times [2024-06-03 20:47:55,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:55,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053764150] [2024-06-03 20:47:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:55,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:55,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053764150] [2024-06-03 20:47:55,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053764150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:55,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:55,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:55,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384233862] [2024-06-03 20:47:55,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:55,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:55,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:55,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:55,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:55,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:47:55,716 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) [2024-06-03 20:47:55,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:55,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:47:55,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:59,911 INFO L124 PetriNetUnfolderBase]: 14904/22199 cut-off events. [2024-06-03 20:47:59,911 INFO L125 PetriNetUnfolderBase]: For 971686/971701 co-relation queries the response was YES. [2024-06-03 20:48:00,081 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. [2024-06-03 20:48:00,189 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 312 selfloop transitions, 98 changer transitions 0/418 dead transitions. [2024-06-03 20:48:00,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 418 transitions, 6609 flow [2024-06-03 20:48:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-03 20:48:00,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485714285714286 [2024-06-03 20:48:00,191 INFO L175 Difference]: Start difference. First operand has 196 places, 353 transitions, 5077 flow. Second operand 7 states and 227 transitions. [2024-06-03 20:48:00,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 418 transitions, 6609 flow [2024-06-03 20:48:02,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 418 transitions, 6379 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:02,468 INFO L231 Difference]: Finished difference. Result has 199 places, 364 transitions, 5391 flow [2024-06-03 20:48:02,469 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} [2024-06-03 20:48:02,469 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 146 predicate places. [2024-06-03 20:48:02,469 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 364 transitions, 5391 flow [2024-06-03 20:48:02,469 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) [2024-06-03 20:48:02,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:02,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:02,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:48:02,470 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)] === [2024-06-03 20:48:02,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:02,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1455533000, now seen corresponding path program 1 times [2024-06-03 20:48:02,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:02,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961932510] [2024-06-03 20:48:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:02,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:02,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:02,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961932510] [2024-06-03 20:48:02,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961932510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:02,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:02,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:02,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113388759] [2024-06-03 20:48:02,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:02,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:02,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:02,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:48:02,860 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) [2024-06-03 20:48:02,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:02,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:48:02,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:07,679 INFO L124 PetriNetUnfolderBase]: 15948/23752 cut-off events. [2024-06-03 20:48:07,679 INFO L125 PetriNetUnfolderBase]: For 1034422/1034437 co-relation queries the response was YES. [2024-06-03 20:48:07,883 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. [2024-06-03 20:48:07,997 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 316 selfloop transitions, 99 changer transitions 1/424 dead transitions. [2024-06-03 20:48:07,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 424 transitions, 6721 flow [2024-06-03 20:48:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 272 transitions. [2024-06-03 20:48:08,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6044444444444445 [2024-06-03 20:48:08,004 INFO L175 Difference]: Start difference. First operand has 199 places, 364 transitions, 5391 flow. Second operand 9 states and 272 transitions. [2024-06-03 20:48:08,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 424 transitions, 6721 flow [2024-06-03 20:48:11,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 424 transitions, 6506 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:11,196 INFO L231 Difference]: Finished difference. Result has 206 places, 369 transitions, 5546 flow [2024-06-03 20:48:11,196 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} [2024-06-03 20:48:11,196 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 153 predicate places. [2024-06-03 20:48:11,197 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 369 transitions, 5546 flow [2024-06-03 20:48:11,197 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) [2024-06-03 20:48:11,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:11,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:11,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:48:11,197 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)] === [2024-06-03 20:48:11,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:11,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1154801655, now seen corresponding path program 2 times [2024-06-03 20:48:11,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:11,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422118186] [2024-06-03 20:48:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:11,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:11,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:11,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422118186] [2024-06-03 20:48:11,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422118186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:11,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:11,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:11,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556825344] [2024-06-03 20:48:11,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:11,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:11,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:11,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:11,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:11,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:48:11,563 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) [2024-06-03 20:48:11,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:11,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:48:11,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:16,069 INFO L124 PetriNetUnfolderBase]: 15894/23668 cut-off events. [2024-06-03 20:48:16,069 INFO L125 PetriNetUnfolderBase]: For 882230/882254 co-relation queries the response was YES. [2024-06-03 20:48:16,306 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. [2024-06-03 20:48:16,731 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 344 selfloop transitions, 31 changer transitions 0/383 dead transitions. [2024-06-03 20:48:16,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 383 transitions, 6360 flow [2024-06-03 20:48:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:48:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:48:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-03 20:48:16,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-03 20:48:16,737 INFO L175 Difference]: Start difference. First operand has 206 places, 369 transitions, 5546 flow. Second operand 5 states and 140 transitions. [2024-06-03 20:48:16,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 383 transitions, 6360 flow [2024-06-03 20:48:19,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 383 transitions, 6145 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:19,142 INFO L231 Difference]: Finished difference. Result has 206 places, 369 transitions, 5402 flow [2024-06-03 20:48:19,143 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} [2024-06-03 20:48:19,143 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 153 predicate places. [2024-06-03 20:48:19,143 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 369 transitions, 5402 flow [2024-06-03 20:48:19,144 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) [2024-06-03 20:48:19,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:19,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:19,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:48:19,144 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)] === [2024-06-03 20:48:19,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:19,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1154788759, now seen corresponding path program 1 times [2024-06-03 20:48:19,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:19,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361499528] [2024-06-03 20:48:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:19,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:19,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:19,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361499528] [2024-06-03 20:48:19,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361499528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:19,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:19,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:19,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970055852] [2024-06-03 20:48:19,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:19,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:19,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:19,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:19,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:19,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-03 20:48:19,658 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) [2024-06-03 20:48:19,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:19,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-03 20:48:19,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:23,785 INFO L124 PetriNetUnfolderBase]: 15111/22941 cut-off events. [2024-06-03 20:48:23,786 INFO L125 PetriNetUnfolderBase]: For 909567/909597 co-relation queries the response was YES. [2024-06-03 20:48:24,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160740 conditions, 22941 events. 15111/22941 cut-off events. For 909567/909597 co-relation queries the response was YES. Maximal size of possible extension queue 1156. Compared 163959 event pairs, 5783 based on Foata normal form. 69/22814 useless extension candidates. Maximal degree in co-relation 160639. Up to 19783 conditions per place. [2024-06-03 20:48:24,102 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 274 selfloop transitions, 36 changer transitions 0/395 dead transitions. [2024-06-03 20:48:24,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 395 transitions, 6202 flow [2024-06-03 20:48:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-03 20:48:24,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-06-03 20:48:24,103 INFO L175 Difference]: Start difference. First operand has 206 places, 369 transitions, 5402 flow. Second operand 6 states and 179 transitions. [2024-06-03 20:48:24,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 395 transitions, 6202 flow [2024-06-03 20:48:26,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 395 transitions, 6138 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:26,363 INFO L231 Difference]: Finished difference. Result has 208 places, 372 transitions, 5501 flow [2024-06-03 20:48:26,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5338, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5501, PETRI_PLACES=208, PETRI_TRANSITIONS=372} [2024-06-03 20:48:26,364 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 155 predicate places. [2024-06-03 20:48:26,364 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 372 transitions, 5501 flow [2024-06-03 20:48:26,364 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) [2024-06-03 20:48:26,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:26,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:26,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:48:26,365 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 20:48:26,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1933985534, now seen corresponding path program 1 times [2024-06-03 20:48:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:26,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634445853] [2024-06-03 20:48:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:26,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:26,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:26,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634445853] [2024-06-03 20:48:26,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634445853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:26,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:26,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:26,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266426533] [2024-06-03 20:48:26,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:26,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:26,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:26,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:26,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:26,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 20:48:26,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 372 transitions, 5501 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:26,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:26,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 20:48:26,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand