./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_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/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 14:03:53,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:03:53,933 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:03:53,936 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:03:53,937 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:03:53,964 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:03:53,964 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:03:53,964 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:03:53,965 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:03:53,968 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:03:53,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:03:53,968 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:03:53,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:03:53,970 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:03:53,970 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:03:53,971 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:03:53,971 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:03:53,971 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:03:53,971 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:03:53,971 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:03:53,972 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:03:53,972 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:03:53,972 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:03:53,972 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:03:53,972 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:03:53,973 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:03:53,973 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:03:53,973 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:03:53,973 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:03:53,974 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:03:53,974 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:03:53,974 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:03:53,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:03:53,975 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:03:53,975 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:03:53,975 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:03:53,975 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:03:53,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:03:53,976 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:03:53,976 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:03:53,976 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:03:53,977 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:03:53,977 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:03:53,977 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:03:54,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:03:54,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:03:54,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:03:54,207 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:03:54,207 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:03:54,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 14:03:54,356 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:03:54,358 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:03:54,359 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:03:55,295 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:03:55,546 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:03:55,548 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:03:55,563 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5618e8181/96c37cf5afbd4529b19d97033f867f2b/FLAGea694c5b7 [2024-06-14 14:03:55,576 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5618e8181/96c37cf5afbd4529b19d97033f867f2b [2024-06-14 14:03:55,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:03:55,578 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:03:55,580 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:03:55,580 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:03:55,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:03:55,584 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:03:54" (1/2) ... [2024-06-14 14:03:55,585 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600d94ff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:03:55, skipping insertion in model container [2024-06-14 14:03:55,585 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:03:54" (1/2) ... [2024-06-14 14:03:55,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@43ab5048 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:03:55, skipping insertion in model container [2024-06-14 14:03:55,587 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:03:55" (2/2) ... [2024-06-14 14:03:55,595 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600d94ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:55, skipping insertion in model container [2024-06-14 14:03:55,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:03:55" (2/2) ... [2024-06-14 14:03:55,596 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:03:55,651 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:03:55,652 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! 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 && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 14:03:55,653 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! 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 && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 14:03:55,653 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! 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 && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 14:03:55,653 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:03:55,653 INFO L106 edCorrectnessWitness]: ghost_update [L776-L776] multithreaded = 1; [2024-06-14 14:03:55,693 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:03:55,967 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:03:55,976 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 14:03:56,085 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:03:56,112 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:03:56,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56 WrapperNode [2024-06-14 14:03:56,113 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:03:56,114 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:03:56,114 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:03:56,114 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:03:56,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,130 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,152 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-14 14:03:56,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:03:56,153 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:03:56,153 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:03:56,153 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:03:56,161 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,167 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,185 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 14:03:56,185 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,186 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,193 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,200 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,201 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,213 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:03:56,214 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:03:56,214 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:03:56,214 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:03:56,215 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (1/1) ... [2024-06-14 14:03:56,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:03:56,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:03:56,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 14:03:56,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 14:03:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:03:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:03:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:03:56,296 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:03:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:03:56,297 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:03:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:03:56,297 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:03:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:03:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:03:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:03:56,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:03:56,299 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 14:03:56,412 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:03:56,414 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:03:56,722 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:03:56,722 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:03:56,797 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:03:56,798 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:03:56,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:03:56 BoogieIcfgContainer [2024-06-14 14:03:56,798 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:03:56,800 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:03:56,801 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:03:56,803 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:03:56,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:03:54" (1/4) ... [2024-06-14 14:03:56,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37315728 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:03:56, skipping insertion in model container [2024-06-14 14:03:56,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:03:55" (2/4) ... [2024-06-14 14:03:56,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37315728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:03:56, skipping insertion in model container [2024-06-14 14:03:56,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:03:56" (3/4) ... [2024-06-14 14:03:56,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37315728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:03:56, skipping insertion in model container [2024-06-14 14:03:56,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:03:56" (4/4) ... [2024-06-14 14:03:56,806 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:03:56,819 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:03:56,819 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 14:03:56,819 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:03:56,871 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:03:56,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-14 14:03:56,931 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-14 14:03:56,932 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:03:56,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 14:03:56,934 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-14 14:03:56,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-14 14:03:56,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:03:56,952 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;@7a1ac232, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:03:56,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 14:03:56,959 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:03:56,959 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:03:56,959 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:03:56,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:56,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:03:56,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:56,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:56,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1844258309, now seen corresponding path program 1 times [2024-06-14 14:03:56,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:56,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857238229] [2024-06-14 14:03:56,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:57,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:57,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857238229] [2024-06-14 14:03:57,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857238229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:57,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:57,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:03:57,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321255945] [2024-06-14 14:03:57,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:57,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:03:57,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:57,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:03:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:03:57,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-14 14:03:57,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:57,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:57,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-14 14:03:57,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:57,738 INFO L124 PetriNetUnfolderBase]: 335/572 cut-off events. [2024-06-14 14:03:57,738 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-06-14 14:03:57,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148 conditions, 572 events. 335/572 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2687 event pairs, 199 based on Foata normal form. 1/541 useless extension candidates. Maximal degree in co-relation 1133. Up to 529 conditions per place. [2024-06-14 14:03:57,747 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-14 14:03:57,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 161 flow [2024-06-14 14:03:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:03:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:03:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-14 14:03:57,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-06-14 14:03:57,758 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 83 transitions. [2024-06-14 14:03:57,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 161 flow [2024-06-14 14:03:57,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:03:57,762 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-14 14:03:57,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-14 14:03:57,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-14 14:03:57,766 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-14 14:03:57,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:57,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:57,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:57,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:03:57,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:57,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:57,767 INFO L85 PathProgramCache]: Analyzing trace with hash 362673149, now seen corresponding path program 1 times [2024-06-14 14:03:57,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:57,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142513342] [2024-06-14 14:03:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:57,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:58,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:58,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142513342] [2024-06-14 14:03:58,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142513342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:58,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:58,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:03:58,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985974306] [2024-06-14 14:03:58,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:58,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:03:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:03:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:03:58,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:03:58,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:58,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:58,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:03:58,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:58,306 INFO L124 PetriNetUnfolderBase]: 586/975 cut-off events. [2024-06-14 14:03:58,306 INFO L125 PetriNetUnfolderBase]: For 181/195 co-relation queries the response was YES. [2024-06-14 14:03:58,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 975 events. 586/975 cut-off events. For 181/195 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4556 event pairs, 265 based on Foata normal form. 13/963 useless extension candidates. Maximal degree in co-relation 2240. Up to 844 conditions per place. [2024-06-14 14:03:58,313 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 36 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-14 14:03:58,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 220 flow [2024-06-14 14:03:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:03:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:03:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 14:03:58,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-14 14:03:58,317 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 101 transitions. [2024-06-14 14:03:58,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 220 flow [2024-06-14 14:03:58,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:03:58,320 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-14 14:03:58,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-14 14:03:58,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-14 14:03:58,321 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-14 14:03:58,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:58,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:58,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:58,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:03:58,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:58,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:58,327 INFO L85 PathProgramCache]: Analyzing trace with hash -281077605, now seen corresponding path program 1 times [2024-06-14 14:03:58,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:58,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695016301] [2024-06-14 14:03:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:58,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:58,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:58,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695016301] [2024-06-14 14:03:58,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695016301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:58,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:58,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:03:58,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518350431] [2024-06-14 14:03:58,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:58,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:03:58,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:03:58,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:03:58,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:03:58,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:58,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:58,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:03:58,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:58,699 INFO L124 PetriNetUnfolderBase]: 544/913 cut-off events. [2024-06-14 14:03:58,699 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2024-06-14 14:03:58,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 913 events. 544/913 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4407 event pairs, 229 based on Foata normal form. 2/911 useless extension candidates. Maximal degree in co-relation 2278. Up to 830 conditions per place. [2024-06-14 14:03:58,704 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 38 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-14 14:03:58,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 255 flow [2024-06-14 14:03:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:03:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:03:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-14 14:03:58,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-14 14:03:58,705 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 4 states and 98 transitions. [2024-06-14 14:03:58,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 255 flow [2024-06-14 14:03:58,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 240 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 14:03:58,708 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 156 flow [2024-06-14 14:03:58,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-14 14:03:58,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-06-14 14:03:58,708 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 156 flow [2024-06-14 14:03:58,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:58,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:58,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:03:58,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:58,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash 467409274, now seen corresponding path program 1 times [2024-06-14 14:03:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:58,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599636296] [2024-06-14 14:03:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:58,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:58,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:58,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599636296] [2024-06-14 14:03:58,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599636296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:58,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:58,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:03:58,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388750546] [2024-06-14 14:03:58,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:58,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:03:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:58,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:03:58,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:03:59,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:03:59,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:59,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:59,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:03:59,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:59,153 INFO L124 PetriNetUnfolderBase]: 536/901 cut-off events. [2024-06-14 14:03:59,153 INFO L125 PetriNetUnfolderBase]: For 739/739 co-relation queries the response was YES. [2024-06-14 14:03:59,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2515 conditions, 901 events. 536/901 cut-off events. For 739/739 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4361 event pairs, 213 based on Foata normal form. 4/901 useless extension candidates. Maximal degree in co-relation 2496. Up to 800 conditions per place. [2024-06-14 14:03:59,159 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 43 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2024-06-14 14:03:59,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 308 flow [2024-06-14 14:03:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:03:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:03:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 14:03:59,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-14 14:03:59,161 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 156 flow. Second operand 5 states and 119 transitions. [2024-06-14 14:03:59,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 308 flow [2024-06-14 14:03:59,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-14 14:03:59,164 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 193 flow [2024-06-14 14:03:59,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-14 14:03:59,165 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-14 14:03:59,165 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 193 flow [2024-06-14 14:03:59,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:59,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:59,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:59,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:03:59,166 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:59,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:59,166 INFO L85 PathProgramCache]: Analyzing trace with hash -336979322, now seen corresponding path program 1 times [2024-06-14 14:03:59,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:59,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009577854] [2024-06-14 14:03:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:59,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:59,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:59,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009577854] [2024-06-14 14:03:59,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009577854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:59,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:59,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:03:59,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368751248] [2024-06-14 14:03:59,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:59,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:03:59,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:59,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:03:59,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:03:59,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:03:59,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:59,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:59,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:03:59,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:59,585 INFO L124 PetriNetUnfolderBase]: 705/1173 cut-off events. [2024-06-14 14:03:59,585 INFO L125 PetriNetUnfolderBase]: For 1482/1485 co-relation queries the response was YES. [2024-06-14 14:03:59,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3476 conditions, 1173 events. 705/1173 cut-off events. For 1482/1485 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5717 event pairs, 227 based on Foata normal form. 5/1171 useless extension candidates. Maximal degree in co-relation 3454. Up to 991 conditions per place. [2024-06-14 14:03:59,592 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 44 selfloop transitions, 13 changer transitions 0/63 dead transitions. [2024-06-14 14:03:59,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 377 flow [2024-06-14 14:03:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:03:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:03:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 14:03:59,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-14 14:03:59,593 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 193 flow. Second operand 4 states and 101 transitions. [2024-06-14 14:03:59,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 377 flow [2024-06-14 14:03:59,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 358 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 14:03:59,596 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 250 flow [2024-06-14 14:03:59,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-06-14 14:03:59,596 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-14 14:03:59,597 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 250 flow [2024-06-14 14:03:59,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:59,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:59,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:59,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:03:59,597 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:59,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:59,598 INFO L85 PathProgramCache]: Analyzing trace with hash -336859352, now seen corresponding path program 2 times [2024-06-14 14:03:59,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:59,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029592851] [2024-06-14 14:03:59,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:59,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:59,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:59,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029592851] [2024-06-14 14:03:59,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029592851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:59,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:59,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:03:59,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067573131] [2024-06-14 14:03:59,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:59,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:03:59,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:03:59,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:03:59,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:03:59,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 250 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:59,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:59,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:03:59,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:00,008 INFO L124 PetriNetUnfolderBase]: 700/1174 cut-off events. [2024-06-14 14:04:00,008 INFO L125 PetriNetUnfolderBase]: For 2110/2113 co-relation queries the response was YES. [2024-06-14 14:04:00,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3879 conditions, 1174 events. 700/1174 cut-off events. For 2110/2113 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5656 event pairs, 243 based on Foata normal form. 2/1169 useless extension candidates. Maximal degree in co-relation 3856. Up to 999 conditions per place. [2024-06-14 14:04:00,016 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 52 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2024-06-14 14:04:00,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 485 flow [2024-06-14 14:04:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 14:04:00,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-14 14:04:00,018 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 250 flow. Second operand 5 states and 119 transitions. [2024-06-14 14:04:00,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 485 flow [2024-06-14 14:04:00,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 444 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:00,022 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 334 flow [2024-06-14 14:04:00,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-14 14:04:00,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-14 14:04:00,023 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 334 flow [2024-06-14 14:04:00,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:00,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:00,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:00,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:04:00,024 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:00,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:00,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1776230155, now seen corresponding path program 1 times [2024-06-14 14:04:00,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:00,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974962790] [2024-06-14 14:04:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:00,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:00,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974962790] [2024-06-14 14:04:00,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974962790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:00,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:00,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:04:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591336758] [2024-06-14 14:04:00,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:00,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:04:00,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:00,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:04:00,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:04:00,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:04:00,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:00,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:00,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:04:00,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:00,409 INFO L124 PetriNetUnfolderBase]: 659/1125 cut-off events. [2024-06-14 14:04:00,409 INFO L125 PetriNetUnfolderBase]: For 2317/2317 co-relation queries the response was YES. [2024-06-14 14:04:00,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3818 conditions, 1125 events. 659/1125 cut-off events. For 2317/2317 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5542 event pairs, 229 based on Foata normal form. 1/1123 useless extension candidates. Maximal degree in co-relation 3792. Up to 977 conditions per place. [2024-06-14 14:04:00,415 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 53 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-06-14 14:04:00,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 524 flow [2024-06-14 14:04:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:04:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:04:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-14 14:04:00,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-14 14:04:00,417 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 334 flow. Second operand 4 states and 95 transitions. [2024-06-14 14:04:00,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 524 flow [2024-06-14 14:04:00,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 502 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-14 14:04:00,421 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 391 flow [2024-06-14 14:04:00,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=391, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2024-06-14 14:04:00,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-14 14:04:00,422 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 391 flow [2024-06-14 14:04:00,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:00,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:00,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:00,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:04:00,423 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:00,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:00,423 INFO L85 PathProgramCache]: Analyzing trace with hash -33193753, now seen corresponding path program 1 times [2024-06-14 14:04:00,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:00,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21218229] [2024-06-14 14:04:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:00,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:00,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:00,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21218229] [2024-06-14 14:04:00,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21218229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:00,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:00,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:00,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293890951] [2024-06-14 14:04:00,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:00,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:00,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:00,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:00,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:00,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 391 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:00,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:00,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:00,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:00,940 INFO L124 PetriNetUnfolderBase]: 924/1541 cut-off events. [2024-06-14 14:04:00,940 INFO L125 PetriNetUnfolderBase]: For 4223/4226 co-relation queries the response was YES. [2024-06-14 14:04:00,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5665 conditions, 1541 events. 924/1541 cut-off events. For 4223/4226 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7950 event pairs, 163 based on Foata normal form. 18/1552 useless extension candidates. Maximal degree in co-relation 5635. Up to 968 conditions per place. [2024-06-14 14:04:00,948 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 66 selfloop transitions, 29 changer transitions 0/101 dead transitions. [2024-06-14 14:04:00,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 101 transitions, 751 flow [2024-06-14 14:04:00,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 14:04:00,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-14 14:04:00,950 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 391 flow. Second operand 6 states and 151 transitions. [2024-06-14 14:04:00,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 101 transitions, 751 flow [2024-06-14 14:04:00,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 747 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 14:04:00,956 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 528 flow [2024-06-14 14:04:00,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=528, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-14 14:04:00,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-14 14:04:00,957 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 528 flow [2024-06-14 14:04:00,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:00,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:00,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:00,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:04:00,958 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:00,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:00,958 INFO L85 PathProgramCache]: Analyzing trace with hash 858517543, now seen corresponding path program 2 times [2024-06-14 14:04:00,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:00,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004231938] [2024-06-14 14:04:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:00,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:01,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004231938] [2024-06-14 14:04:01,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004231938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:01,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:01,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:01,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682458275] [2024-06-14 14:04:01,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:01,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:01,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:01,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:01,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:01,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 528 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:01,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:01,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:01,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:01,462 INFO L124 PetriNetUnfolderBase]: 868/1457 cut-off events. [2024-06-14 14:04:01,462 INFO L125 PetriNetUnfolderBase]: For 5555/5558 co-relation queries the response was YES. [2024-06-14 14:04:01,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5745 conditions, 1457 events. 868/1457 cut-off events. For 5555/5558 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7501 event pairs, 213 based on Foata normal form. 28/1478 useless extension candidates. Maximal degree in co-relation 5711. Up to 1075 conditions per place. [2024-06-14 14:04:01,472 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 62 selfloop transitions, 25 changer transitions 0/93 dead transitions. [2024-06-14 14:04:01,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 789 flow [2024-06-14 14:04:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 14:04:01,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-14 14:04:01,474 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 528 flow. Second operand 5 states and 126 transitions. [2024-06-14 14:04:01,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 789 flow [2024-06-14 14:04:01,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 744 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:01,482 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 562 flow [2024-06-14 14:04:01,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=562, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-06-14 14:04:01,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-14 14:04:01,483 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 562 flow [2024-06-14 14:04:01,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:01,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:01,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:01,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:04:01,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:01,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1599247001, now seen corresponding path program 3 times [2024-06-14 14:04:01,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:01,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123432221] [2024-06-14 14:04:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:01,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:01,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123432221] [2024-06-14 14:04:01,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123432221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:01,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:01,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:01,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687568475] [2024-06-14 14:04:01,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:01,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:01,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:01,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:01,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:01,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:01,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 562 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:01,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:01,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:01,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:01,931 INFO L124 PetriNetUnfolderBase]: 901/1516 cut-off events. [2024-06-14 14:04:01,932 INFO L125 PetriNetUnfolderBase]: For 5890/5893 co-relation queries the response was YES. [2024-06-14 14:04:01,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6096 conditions, 1516 events. 901/1516 cut-off events. For 5890/5893 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7865 event pairs, 273 based on Foata normal form. 16/1525 useless extension candidates. Maximal degree in co-relation 6060. Up to 1243 conditions per place. [2024-06-14 14:04:01,941 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 74 selfloop transitions, 17 changer transitions 0/97 dead transitions. [2024-06-14 14:04:01,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 831 flow [2024-06-14 14:04:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 14:04:01,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-14 14:04:01,943 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 562 flow. Second operand 6 states and 141 transitions. [2024-06-14 14:04:01,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 831 flow [2024-06-14 14:04:01,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 97 transitions, 789 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:01,952 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 575 flow [2024-06-14 14:04:01,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-06-14 14:04:01,952 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-14 14:04:01,953 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 575 flow [2024-06-14 14:04:01,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:01,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:01,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:01,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:04:01,953 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:01,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:01,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1599062551, now seen corresponding path program 1 times [2024-06-14 14:04:01,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:01,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882709091] [2024-06-14 14:04:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:01,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:02,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:02,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882709091] [2024-06-14 14:04:02,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882709091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:02,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:02,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:02,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608052888] [2024-06-14 14:04:02,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:02,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:02,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:02,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:02,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:02,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:02,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 575 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:02,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:02,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:02,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:02,393 INFO L124 PetriNetUnfolderBase]: 881/1484 cut-off events. [2024-06-14 14:04:02,393 INFO L125 PetriNetUnfolderBase]: For 6127/6130 co-relation queries the response was YES. [2024-06-14 14:04:02,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5949 conditions, 1484 events. 881/1484 cut-off events. For 6127/6130 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7672 event pairs, 208 based on Foata normal form. 12/1489 useless extension candidates. Maximal degree in co-relation 5912. Up to 1004 conditions per place. [2024-06-14 14:04:02,402 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 74 selfloop transitions, 20 changer transitions 0/100 dead transitions. [2024-06-14 14:04:02,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 836 flow [2024-06-14 14:04:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 14:04:02,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-14 14:04:02,404 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 575 flow. Second operand 6 states and 143 transitions. [2024-06-14 14:04:02,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 836 flow [2024-06-14 14:04:02,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 100 transitions, 797 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:02,413 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 562 flow [2024-06-14 14:04:02,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=562, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-06-14 14:04:02,413 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-14 14:04:02,413 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 562 flow [2024-06-14 14:04:02,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:02,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:02,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:02,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:04:02,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:02,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:02,414 INFO L85 PathProgramCache]: Analyzing trace with hash -776207771, now seen corresponding path program 1 times [2024-06-14 14:04:02,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:02,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958717793] [2024-06-14 14:04:02,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:02,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:02,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:02,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958717793] [2024-06-14 14:04:02,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958717793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:02,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:02,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:04:02,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816716314] [2024-06-14 14:04:02,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:02,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:04:02,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:02,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:04:02,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:04:02,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:04:02,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 562 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:02,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:02,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:04:02,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:02,796 INFO L124 PetriNetUnfolderBase]: 812/1418 cut-off events. [2024-06-14 14:04:02,796 INFO L125 PetriNetUnfolderBase]: For 6296/6296 co-relation queries the response was YES. [2024-06-14 14:04:02,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5743 conditions, 1418 events. 812/1418 cut-off events. For 6296/6296 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7544 event pairs, 244 based on Foata normal form. 2/1415 useless extension candidates. Maximal degree in co-relation 5705. Up to 1249 conditions per place. [2024-06-14 14:04:02,804 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 64 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-06-14 14:04:02,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 91 transitions, 824 flow [2024-06-14 14:04:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:02,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 14:04:02,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-14 14:04:02,805 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 562 flow. Second operand 5 states and 116 transitions. [2024-06-14 14:04:02,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 91 transitions, 824 flow [2024-06-14 14:04:02,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 773 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:02,815 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 654 flow [2024-06-14 14:04:02,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=654, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-06-14 14:04:02,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-14 14:04:02,816 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 654 flow [2024-06-14 14:04:02,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:02,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:02,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:02,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:04:02,816 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:02,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:02,817 INFO L85 PathProgramCache]: Analyzing trace with hash -974158742, now seen corresponding path program 1 times [2024-06-14 14:04:02,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:02,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537067559] [2024-06-14 14:04:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:02,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:03,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:03,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537067559] [2024-06-14 14:04:03,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537067559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:03,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:03,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:03,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361222361] [2024-06-14 14:04:03,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:03,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:03,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:03,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:04:03,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 654 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:03,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:03,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:04:03,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:03,410 INFO L124 PetriNetUnfolderBase]: 833/1432 cut-off events. [2024-06-14 14:04:03,410 INFO L125 PetriNetUnfolderBase]: For 6910/6910 co-relation queries the response was YES. [2024-06-14 14:04:03,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5867 conditions, 1432 events. 833/1432 cut-off events. For 6910/6910 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7648 event pairs, 249 based on Foata normal form. 2/1418 useless extension candidates. Maximal degree in co-relation 5827. Up to 1239 conditions per place. [2024-06-14 14:04:03,421 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 58 selfloop transitions, 18 changer transitions 0/90 dead transitions. [2024-06-14 14:04:03,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 90 transitions, 846 flow [2024-06-14 14:04:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:04:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:04:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-14 14:04:03,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:04:03,423 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 654 flow. Second operand 4 states and 96 transitions. [2024-06-14 14:04:03,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 90 transitions, 846 flow [2024-06-14 14:04:03,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 816 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-14 14:04:03,435 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 697 flow [2024-06-14 14:04:03,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=697, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-06-14 14:04:03,436 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 42 predicate places. [2024-06-14 14:04:03,436 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 697 flow [2024-06-14 14:04:03,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:03,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:03,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:03,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:04:03,437 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:03,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:03,437 INFO L85 PathProgramCache]: Analyzing trace with hash -973772792, now seen corresponding path program 2 times [2024-06-14 14:04:03,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:03,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988313760] [2024-06-14 14:04:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:03,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:03,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:03,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988313760] [2024-06-14 14:04:03,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988313760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:03,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:03,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:03,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466829845] [2024-06-14 14:04:03,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:03,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:03,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:03,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:03,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:03,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:04:03,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 697 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:03,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:03,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:04:03,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:03,963 INFO L124 PetriNetUnfolderBase]: 832/1428 cut-off events. [2024-06-14 14:04:03,963 INFO L125 PetriNetUnfolderBase]: For 7800/7800 co-relation queries the response was YES. [2024-06-14 14:04:03,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6141 conditions, 1428 events. 832/1428 cut-off events. For 7800/7800 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7485 event pairs, 237 based on Foata normal form. 2/1420 useless extension candidates. Maximal degree in co-relation 6098. Up to 1229 conditions per place. [2024-06-14 14:04:03,973 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 67 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-06-14 14:04:03,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 103 transitions, 950 flow [2024-06-14 14:04:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 14:04:03,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 14:04:03,975 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 697 flow. Second operand 7 states and 155 transitions. [2024-06-14 14:04:03,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 103 transitions, 950 flow [2024-06-14 14:04:03,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 103 transitions, 905 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:03,990 INFO L231 Difference]: Finished difference. Result has 88 places, 85 transitions, 734 flow [2024-06-14 14:04:03,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=88, PETRI_TRANSITIONS=85} [2024-06-14 14:04:03,991 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-14 14:04:03,991 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 85 transitions, 734 flow [2024-06-14 14:04:03,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:03,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:03,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:03,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:04:03,991 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:03,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:03,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1707363660, now seen corresponding path program 1 times [2024-06-14 14:04:03,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:03,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919835191] [2024-06-14 14:04:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:03,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:04,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:04,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919835191] [2024-06-14 14:04:04,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919835191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:04,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:04,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:04,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146291066] [2024-06-14 14:04:04,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:04,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:04,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:04,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:04,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:04,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 85 transitions, 734 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:04,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:04,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:04,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:04,430 INFO L124 PetriNetUnfolderBase]: 884/1494 cut-off events. [2024-06-14 14:04:04,431 INFO L125 PetriNetUnfolderBase]: For 8334/8334 co-relation queries the response was YES. [2024-06-14 14:04:04,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6561 conditions, 1494 events. 884/1494 cut-off events. For 8334/8334 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7703 event pairs, 242 based on Foata normal form. 1/1492 useless extension candidates. Maximal degree in co-relation 6517. Up to 1349 conditions per place. [2024-06-14 14:04:04,442 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 88 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-14 14:04:04,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 113 transitions, 1117 flow [2024-06-14 14:04:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 14:04:04,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:04:04,443 INFO L175 Difference]: Start difference. First operand has 88 places, 85 transitions, 734 flow. Second operand 6 states and 132 transitions. [2024-06-14 14:04:04,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 113 transitions, 1117 flow [2024-06-14 14:04:04,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 113 transitions, 1037 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 14:04:04,459 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 823 flow [2024-06-14 14:04:04,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=823, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-06-14 14:04:04,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-14 14:04:04,460 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 823 flow [2024-06-14 14:04:04,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:04,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:04,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:04,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:04:04,461 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:04,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:04,461 INFO L85 PathProgramCache]: Analyzing trace with hash -973766840, now seen corresponding path program 2 times [2024-06-14 14:04:04,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:04,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368059084] [2024-06-14 14:04:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:04,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:04,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:04,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368059084] [2024-06-14 14:04:04,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368059084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:04,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:04,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:04,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629419019] [2024-06-14 14:04:04,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:04,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:04,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:04,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:04,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:04,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:04,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 823 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:04,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:04,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:04,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:04,947 INFO L124 PetriNetUnfolderBase]: 889/1503 cut-off events. [2024-06-14 14:04:04,947 INFO L125 PetriNetUnfolderBase]: For 9460/9460 co-relation queries the response was YES. [2024-06-14 14:04:04,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6841 conditions, 1503 events. 889/1503 cut-off events. For 9460/9460 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7766 event pairs, 241 based on Foata normal form. 1/1501 useless extension candidates. Maximal degree in co-relation 6797. Up to 1361 conditions per place. [2024-06-14 14:04:04,957 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 93 selfloop transitions, 19 changer transitions 0/118 dead transitions. [2024-06-14 14:04:04,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 1158 flow [2024-06-14 14:04:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:04,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 14:04:04,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 14:04:04,958 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 823 flow. Second operand 7 states and 147 transitions. [2024-06-14 14:04:04,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 1158 flow [2024-06-14 14:04:04,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 118 transitions, 1122 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:04,984 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 882 flow [2024-06-14 14:04:04,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=882, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-06-14 14:04:04,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-14 14:04:04,986 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 882 flow [2024-06-14 14:04:04,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:04,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:04,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:04,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:04:04,987 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:04,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:04,987 INFO L85 PathProgramCache]: Analyzing trace with hash -973974230, now seen corresponding path program 3 times [2024-06-14 14:04:04,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:04,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745079941] [2024-06-14 14:04:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:04,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:05,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:05,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745079941] [2024-06-14 14:04:05,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745079941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:05,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:05,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:05,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833568536] [2024-06-14 14:04:05,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:05,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:05,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:05,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:05,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:05,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 882 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:05,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:05,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:05,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:05,433 INFO L124 PetriNetUnfolderBase]: 886/1499 cut-off events. [2024-06-14 14:04:05,434 INFO L125 PetriNetUnfolderBase]: For 10306/10306 co-relation queries the response was YES. [2024-06-14 14:04:05,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6862 conditions, 1499 events. 886/1499 cut-off events. For 10306/10306 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7773 event pairs, 242 based on Foata normal form. 1/1497 useless extension candidates. Maximal degree in co-relation 6816. Up to 1358 conditions per place. [2024-06-14 14:04:05,444 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 91 selfloop transitions, 18 changer transitions 0/115 dead transitions. [2024-06-14 14:04:05,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 115 transitions, 1137 flow [2024-06-14 14:04:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:05,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-14 14:04:05,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-14 14:04:05,445 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 882 flow. Second operand 5 states and 114 transitions. [2024-06-14 14:04:05,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 115 transitions, 1137 flow [2024-06-14 14:04:05,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 115 transitions, 1081 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:05,470 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 868 flow [2024-06-14 14:04:05,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=868, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-06-14 14:04:05,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-14 14:04:05,471 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 868 flow [2024-06-14 14:04:05,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:05,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:05,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:05,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:04:05,471 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:05,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash -973758904, now seen corresponding path program 1 times [2024-06-14 14:04:05,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:05,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88951855] [2024-06-14 14:04:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:05,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:05,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:05,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88951855] [2024-06-14 14:04:05,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88951855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:05,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:05,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:05,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382258134] [2024-06-14 14:04:05,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:05,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:05,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:05,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:05,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:05,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:04:05,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 868 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:05,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:05,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:04:05,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:05,916 INFO L124 PetriNetUnfolderBase]: 834/1435 cut-off events. [2024-06-14 14:04:05,916 INFO L125 PetriNetUnfolderBase]: For 10795/10795 co-relation queries the response was YES. [2024-06-14 14:04:05,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6573 conditions, 1435 events. 834/1435 cut-off events. For 10795/10795 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7508 event pairs, 235 based on Foata normal form. 2/1427 useless extension candidates. Maximal degree in co-relation 6526. Up to 1258 conditions per place. [2024-06-14 14:04:05,926 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 91 selfloop transitions, 10 changer transitions 0/115 dead transitions. [2024-06-14 14:04:05,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 115 transitions, 1115 flow [2024-06-14 14:04:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-14 14:04:05,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-14 14:04:05,927 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 868 flow. Second operand 5 states and 112 transitions. [2024-06-14 14:04:05,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 115 transitions, 1115 flow [2024-06-14 14:04:05,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 115 transitions, 1079 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:05,949 INFO L231 Difference]: Finished difference. Result has 97 places, 104 transitions, 875 flow [2024-06-14 14:04:05,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=875, PETRI_PLACES=97, PETRI_TRANSITIONS=104} [2024-06-14 14:04:05,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-14 14:04:05,950 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 104 transitions, 875 flow [2024-06-14 14:04:05,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:05,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:05,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:05,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:04:05,950 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:05,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:05,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1385804804, now seen corresponding path program 1 times [2024-06-14 14:04:05,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:05,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742557283] [2024-06-14 14:04:05,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:05,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:06,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:06,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742557283] [2024-06-14 14:04:06,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742557283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:06,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:06,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:06,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723192503] [2024-06-14 14:04:06,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:06,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:06,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:06,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:04:06,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 104 transitions, 875 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:06,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:06,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:04:06,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:06,388 INFO L124 PetriNetUnfolderBase]: 861/1471 cut-off events. [2024-06-14 14:04:06,388 INFO L125 PetriNetUnfolderBase]: For 12540/12540 co-relation queries the response was YES. [2024-06-14 14:04:06,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6886 conditions, 1471 events. 861/1471 cut-off events. For 12540/12540 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7706 event pairs, 199 based on Foata normal form. 4/1470 useless extension candidates. Maximal degree in co-relation 6838. Up to 1194 conditions per place. [2024-06-14 14:04:06,398 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 83 selfloop transitions, 30 changer transitions 0/128 dead transitions. [2024-06-14 14:04:06,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 128 transitions, 1238 flow [2024-06-14 14:04:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 14:04:06,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-14 14:04:06,399 INFO L175 Difference]: Start difference. First operand has 97 places, 104 transitions, 875 flow. Second operand 6 states and 139 transitions. [2024-06-14 14:04:06,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 128 transitions, 1238 flow [2024-06-14 14:04:06,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 1211 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:06,423 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 990 flow [2024-06-14 14:04:06,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=990, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2024-06-14 14:04:06,424 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-14 14:04:06,424 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 990 flow [2024-06-14 14:04:06,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:06,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:06,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:06,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:04:06,424 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:06,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1388661764, now seen corresponding path program 2 times [2024-06-14 14:04:06,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:06,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856457694] [2024-06-14 14:04:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:06,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:06,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:06,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856457694] [2024-06-14 14:04:06,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856457694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:06,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:06,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:04:06,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335045792] [2024-06-14 14:04:06,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:06,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:04:06,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:06,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:04:06,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:04:06,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:04:06,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 990 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:06,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:06,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:04:06,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:06,898 INFO L124 PetriNetUnfolderBase]: 851/1457 cut-off events. [2024-06-14 14:04:06,898 INFO L125 PetriNetUnfolderBase]: For 13827/13827 co-relation queries the response was YES. [2024-06-14 14:04:06,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7040 conditions, 1457 events. 851/1457 cut-off events. For 13827/13827 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7618 event pairs, 234 based on Foata normal form. 4/1456 useless extension candidates. Maximal degree in co-relation 6990. Up to 1252 conditions per place. [2024-06-14 14:04:06,910 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 82 selfloop transitions, 26 changer transitions 0/123 dead transitions. [2024-06-14 14:04:06,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 123 transitions, 1240 flow [2024-06-14 14:04:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 14:04:06,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-14 14:04:06,912 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 990 flow. Second operand 6 states and 134 transitions. [2024-06-14 14:04:06,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 123 transitions, 1240 flow [2024-06-14 14:04:06,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 123 transitions, 1154 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:06,948 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 962 flow [2024-06-14 14:04:06,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=962, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2024-06-14 14:04:06,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-14 14:04:06,949 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 962 flow [2024-06-14 14:04:06,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:06,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:06,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:06,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:04:06,950 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:06,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:06,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1233596212, now seen corresponding path program 1 times [2024-06-14 14:04:06,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:06,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547888472] [2024-06-14 14:04:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:06,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:07,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:07,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547888472] [2024-06-14 14:04:07,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547888472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:07,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:07,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:07,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506785505] [2024-06-14 14:04:07,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:07,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:07,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:07,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:07,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:07,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 962 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:07,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:07,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:07,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:07,494 INFO L124 PetriNetUnfolderBase]: 892/1508 cut-off events. [2024-06-14 14:04:07,495 INFO L125 PetriNetUnfolderBase]: For 14438/14441 co-relation queries the response was YES. [2024-06-14 14:04:07,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7223 conditions, 1508 events. 892/1508 cut-off events. For 14438/14441 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7790 event pairs, 251 based on Foata normal form. 1/1502 useless extension candidates. Maximal degree in co-relation 7172. Up to 1295 conditions per place. [2024-06-14 14:04:07,540 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 82 selfloop transitions, 36 changer transitions 0/124 dead transitions. [2024-06-14 14:04:07,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 124 transitions, 1264 flow [2024-06-14 14:04:07,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 14:04:07,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-14 14:04:07,542 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 962 flow. Second operand 5 states and 118 transitions. [2024-06-14 14:04:07,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 124 transitions, 1264 flow [2024-06-14 14:04:07,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 124 transitions, 1210 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:07,572 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 1035 flow [2024-06-14 14:04:07,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1035, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2024-06-14 14:04:07,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-14 14:04:07,573 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 1035 flow [2024-06-14 14:04:07,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:07,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:07,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:07,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:04:07,574 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:07,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:07,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1409244300, now seen corresponding path program 2 times [2024-06-14 14:04:07,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:07,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541163159] [2024-06-14 14:04:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:07,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:07,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:07,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541163159] [2024-06-14 14:04:07,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541163159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:07,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:07,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:07,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443177240] [2024-06-14 14:04:07,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:07,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:07,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:07,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:07,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:07,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:07,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 1035 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:07,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:07,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:07,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:08,037 INFO L124 PetriNetUnfolderBase]: 897/1525 cut-off events. [2024-06-14 14:04:08,037 INFO L125 PetriNetUnfolderBase]: For 16384/16387 co-relation queries the response was YES. [2024-06-14 14:04:08,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7564 conditions, 1525 events. 897/1525 cut-off events. For 16384/16387 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7957 event pairs, 251 based on Foata normal form. 1/1519 useless extension candidates. Maximal degree in co-relation 7512. Up to 1284 conditions per place. [2024-06-14 14:04:08,049 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 87 selfloop transitions, 42 changer transitions 0/135 dead transitions. [2024-06-14 14:04:08,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 1457 flow [2024-06-14 14:04:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 14:04:08,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-14 14:04:08,050 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 1035 flow. Second operand 6 states and 138 transitions. [2024-06-14 14:04:08,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 1457 flow [2024-06-14 14:04:08,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 135 transitions, 1358 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:08,085 INFO L231 Difference]: Finished difference. Result has 108 places, 118 transitions, 1118 flow [2024-06-14 14:04:08,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1118, PETRI_PLACES=108, PETRI_TRANSITIONS=118} [2024-06-14 14:04:08,085 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-14 14:04:08,085 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 118 transitions, 1118 flow [2024-06-14 14:04:08,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:08,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:08,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:08,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:04:08,086 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:08,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1408975530, now seen corresponding path program 3 times [2024-06-14 14:04:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:08,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243166296] [2024-06-14 14:04:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:08,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:08,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:08,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243166296] [2024-06-14 14:04:08,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243166296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:08,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:08,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:08,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68293599] [2024-06-14 14:04:08,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:08,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:08,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:08,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:08,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:08,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:08,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 118 transitions, 1118 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:08,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:08,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:08,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:08,547 INFO L124 PetriNetUnfolderBase]: 902/1534 cut-off events. [2024-06-14 14:04:08,548 INFO L125 PetriNetUnfolderBase]: For 17032/17035 co-relation queries the response was YES. [2024-06-14 14:04:08,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7693 conditions, 1534 events. 902/1534 cut-off events. For 17032/17035 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8027 event pairs, 251 based on Foata normal form. 1/1528 useless extension candidates. Maximal degree in co-relation 7640. Up to 1290 conditions per place. [2024-06-14 14:04:08,558 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 83 selfloop transitions, 46 changer transitions 0/135 dead transitions. [2024-06-14 14:04:08,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 1492 flow [2024-06-14 14:04:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 14:04:08,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 14:04:08,559 INFO L175 Difference]: Start difference. First operand has 108 places, 118 transitions, 1118 flow. Second operand 6 states and 136 transitions. [2024-06-14 14:04:08,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 1492 flow [2024-06-14 14:04:08,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 135 transitions, 1409 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:08,588 INFO L231 Difference]: Finished difference. Result has 112 places, 121 transitions, 1177 flow [2024-06-14 14:04:08,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1177, PETRI_PLACES=112, PETRI_TRANSITIONS=121} [2024-06-14 14:04:08,589 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-14 14:04:08,589 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 121 transitions, 1177 flow [2024-06-14 14:04:08,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:08,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:08,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:08,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:04:08,589 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:08,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:08,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1408975189, now seen corresponding path program 1 times [2024-06-14 14:04:08,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:08,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181680525] [2024-06-14 14:04:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:08,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:08,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:08,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181680525] [2024-06-14 14:04:08,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181680525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:08,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:08,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:08,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51490094] [2024-06-14 14:04:08,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:08,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:08,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:08,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:08,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 121 transitions, 1177 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:08,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:08,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:08,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:09,040 INFO L124 PetriNetUnfolderBase]: 915/1557 cut-off events. [2024-06-14 14:04:09,040 INFO L125 PetriNetUnfolderBase]: For 18449/18455 co-relation queries the response was YES. [2024-06-14 14:04:09,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 1557 events. 915/1557 cut-off events. For 18449/18455 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8216 event pairs, 242 based on Foata normal form. 5/1557 useless extension candidates. Maximal degree in co-relation 7893. Up to 1338 conditions per place. [2024-06-14 14:04:09,049 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 95 selfloop transitions, 45 changer transitions 0/146 dead transitions. [2024-06-14 14:04:09,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 146 transitions, 1619 flow [2024-06-14 14:04:09,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 14:04:09,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-14 14:04:09,051 INFO L175 Difference]: Start difference. First operand has 112 places, 121 transitions, 1177 flow. Second operand 8 states and 170 transitions. [2024-06-14 14:04:09,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 146 transitions, 1619 flow [2024-06-14 14:04:09,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 146 transitions, 1531 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:09,155 INFO L231 Difference]: Finished difference. Result has 118 places, 130 transitions, 1291 flow [2024-06-14 14:04:09,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1291, PETRI_PLACES=118, PETRI_TRANSITIONS=130} [2024-06-14 14:04:09,156 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-14 14:04:09,156 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 130 transitions, 1291 flow [2024-06-14 14:04:09,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:09,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:09,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:09,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:04:09,157 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:09,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:09,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1548082083, now seen corresponding path program 2 times [2024-06-14 14:04:09,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:09,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441176131] [2024-06-14 14:04:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:09,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:09,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:09,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441176131] [2024-06-14 14:04:09,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441176131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:09,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:09,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:09,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172551637] [2024-06-14 14:04:09,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:09,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:09,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:09,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:09,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:09,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:09,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 130 transitions, 1291 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:09,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:09,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:09,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:09,649 INFO L124 PetriNetUnfolderBase]: 957/1621 cut-off events. [2024-06-14 14:04:09,649 INFO L125 PetriNetUnfolderBase]: For 21835/21838 co-relation queries the response was YES. [2024-06-14 14:04:09,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8707 conditions, 1621 events. 957/1621 cut-off events. For 21835/21838 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8568 event pairs, 250 based on Foata normal form. 2/1616 useless extension candidates. Maximal degree in co-relation 8650. Up to 1373 conditions per place. [2024-06-14 14:04:09,660 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 102 selfloop transitions, 55 changer transitions 0/163 dead transitions. [2024-06-14 14:04:09,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 163 transitions, 1951 flow [2024-06-14 14:04:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 14:04:09,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-14 14:04:09,661 INFO L175 Difference]: Start difference. First operand has 118 places, 130 transitions, 1291 flow. Second operand 7 states and 157 transitions. [2024-06-14 14:04:09,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 163 transitions, 1951 flow [2024-06-14 14:04:09,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 163 transitions, 1850 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:09,696 INFO L231 Difference]: Finished difference. Result has 122 places, 148 transitions, 1631 flow [2024-06-14 14:04:09,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1631, PETRI_PLACES=122, PETRI_TRANSITIONS=148} [2024-06-14 14:04:09,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-14 14:04:09,697 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 148 transitions, 1631 flow [2024-06-14 14:04:09,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:09,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:09,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:09,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:04:09,698 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:09,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash 204654217, now seen corresponding path program 3 times [2024-06-14 14:04:09,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:09,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881188808] [2024-06-14 14:04:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:09,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:09,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:09,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881188808] [2024-06-14 14:04:09,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881188808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:09,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:09,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:09,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822038979] [2024-06-14 14:04:09,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:09,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:09,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:09,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:09,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:10,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:10,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 148 transitions, 1631 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:10,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:10,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:10,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:10,223 INFO L124 PetriNetUnfolderBase]: 951/1613 cut-off events. [2024-06-14 14:04:10,223 INFO L125 PetriNetUnfolderBase]: For 22641/22644 co-relation queries the response was YES. [2024-06-14 14:04:10,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8981 conditions, 1613 events. 951/1613 cut-off events. For 22641/22644 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8509 event pairs, 250 based on Foata normal form. 2/1608 useless extension candidates. Maximal degree in co-relation 8922. Up to 1367 conditions per place. [2024-06-14 14:04:10,234 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 100 selfloop transitions, 55 changer transitions 0/161 dead transitions. [2024-06-14 14:04:10,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 161 transitions, 1973 flow [2024-06-14 14:04:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 14:04:10,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-14 14:04:10,235 INFO L175 Difference]: Start difference. First operand has 122 places, 148 transitions, 1631 flow. Second operand 6 states and 138 transitions. [2024-06-14 14:04:10,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 161 transitions, 1973 flow [2024-06-14 14:04:10,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 161 transitions, 1832 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:10,278 INFO L231 Difference]: Finished difference. Result has 124 places, 148 transitions, 1614 flow [2024-06-14 14:04:10,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1614, PETRI_PLACES=124, PETRI_TRANSITIONS=148} [2024-06-14 14:04:10,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-14 14:04:10,278 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 148 transitions, 1614 flow [2024-06-14 14:04:10,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:10,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:10,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:10,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:04:10,279 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:10,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash 204653876, now seen corresponding path program 4 times [2024-06-14 14:04:10,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:10,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179751412] [2024-06-14 14:04:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:10,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:10,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:10,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179751412] [2024-06-14 14:04:10,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179751412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:10,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:10,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:10,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502137421] [2024-06-14 14:04:10,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:10,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:10,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:10,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:10,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:10,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:10,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 148 transitions, 1614 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:10,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:10,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:10,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:10,774 INFO L124 PetriNetUnfolderBase]: 948/1609 cut-off events. [2024-06-14 14:04:10,775 INFO L125 PetriNetUnfolderBase]: For 21937/21940 co-relation queries the response was YES. [2024-06-14 14:04:10,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8981 conditions, 1609 events. 948/1609 cut-off events. For 21937/21940 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8513 event pairs, 250 based on Foata normal form. 1/1603 useless extension candidates. Maximal degree in co-relation 8921. Up to 1361 conditions per place. [2024-06-14 14:04:10,789 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 117 selfloop transitions, 40 changer transitions 0/163 dead transitions. [2024-06-14 14:04:10,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 163 transitions, 1966 flow [2024-06-14 14:04:10,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 14:04:10,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:04:10,790 INFO L175 Difference]: Start difference. First operand has 124 places, 148 transitions, 1614 flow. Second operand 5 states and 120 transitions. [2024-06-14 14:04:10,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 163 transitions, 1966 flow [2024-06-14 14:04:10,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 163 transitions, 1828 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:10,834 INFO L231 Difference]: Finished difference. Result has 123 places, 148 transitions, 1568 flow [2024-06-14 14:04:10,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1568, PETRI_PLACES=123, PETRI_TRANSITIONS=148} [2024-06-14 14:04:10,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-14 14:04:10,835 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 148 transitions, 1568 flow [2024-06-14 14:04:10,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:10,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:10,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:10,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:04:10,836 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:10,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash 204869543, now seen corresponding path program 1 times [2024-06-14 14:04:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:10,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840693515] [2024-06-14 14:04:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:10,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:11,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:11,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840693515] [2024-06-14 14:04:11,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840693515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:11,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:11,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:11,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748093068] [2024-06-14 14:04:11,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:11,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:11,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:11,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:11,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:11,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:04:11,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 148 transitions, 1568 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:11,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:11,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:04:11,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:11,349 INFO L124 PetriNetUnfolderBase]: 929/1587 cut-off events. [2024-06-14 14:04:11,349 INFO L125 PetriNetUnfolderBase]: For 24079/24087 co-relation queries the response was YES. [2024-06-14 14:04:11,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8810 conditions, 1587 events. 929/1587 cut-off events. For 24079/24087 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8511 event pairs, 243 based on Foata normal form. 10/1579 useless extension candidates. Maximal degree in co-relation 8750. Up to 1308 conditions per place. [2024-06-14 14:04:11,363 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 116 selfloop transitions, 23 changer transitions 0/162 dead transitions. [2024-06-14 14:04:11,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 162 transitions, 1914 flow [2024-06-14 14:04:11,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-14 14:04:11,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-14 14:04:11,365 INFO L175 Difference]: Start difference. First operand has 123 places, 148 transitions, 1568 flow. Second operand 5 states and 117 transitions. [2024-06-14 14:04:11,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 162 transitions, 1914 flow [2024-06-14 14:04:11,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 162 transitions, 1800 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:11,403 INFO L231 Difference]: Finished difference. Result has 123 places, 149 transitions, 1523 flow [2024-06-14 14:04:11,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1523, PETRI_PLACES=123, PETRI_TRANSITIONS=149} [2024-06-14 14:04:11,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-14 14:04:11,404 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 149 transitions, 1523 flow [2024-06-14 14:04:11,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:11,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:11,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:11,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:04:11,404 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:11,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:11,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2074848401, now seen corresponding path program 4 times [2024-06-14 14:04:11,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:11,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214003183] [2024-06-14 14:04:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:11,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:11,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:11,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214003183] [2024-06-14 14:04:11,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214003183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:11,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:11,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:11,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398422815] [2024-06-14 14:04:11,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:11,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:11,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:11,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:11,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:11,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:11,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 149 transitions, 1523 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:11,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:11,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:11,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:11,973 INFO L124 PetriNetUnfolderBase]: 989/1677 cut-off events. [2024-06-14 14:04:11,974 INFO L125 PetriNetUnfolderBase]: For 23249/23249 co-relation queries the response was YES. [2024-06-14 14:04:11,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9351 conditions, 1677 events. 989/1677 cut-off events. For 23249/23249 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8926 event pairs, 241 based on Foata normal form. 1/1675 useless extension candidates. Maximal degree in co-relation 9290. Up to 1423 conditions per place. [2024-06-14 14:04:11,987 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 117 selfloop transitions, 64 changer transitions 0/187 dead transitions. [2024-06-14 14:04:11,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 187 transitions, 2110 flow [2024-06-14 14:04:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-14 14:04:11,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-14 14:04:11,989 INFO L175 Difference]: Start difference. First operand has 123 places, 149 transitions, 1523 flow. Second operand 11 states and 230 transitions. [2024-06-14 14:04:11,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 187 transitions, 2110 flow [2024-06-14 14:04:12,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 187 transitions, 2069 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:12,035 INFO L231 Difference]: Finished difference. Result has 132 places, 158 transitions, 1744 flow [2024-06-14 14:04:12,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1744, PETRI_PLACES=132, PETRI_TRANSITIONS=158} [2024-06-14 14:04:12,036 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-14 14:04:12,036 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 158 transitions, 1744 flow [2024-06-14 14:04:12,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:12,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:12,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:12,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:04:12,036 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:12,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:12,037 INFO L85 PathProgramCache]: Analyzing trace with hash 313261803, now seen corresponding path program 5 times [2024-06-14 14:04:12,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:12,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178832757] [2024-06-14 14:04:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:12,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:12,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:12,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178832757] [2024-06-14 14:04:12,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178832757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:12,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:12,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:12,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915618544] [2024-06-14 14:04:12,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:12,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:12,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:12,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:12,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:12,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:12,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 158 transitions, 1744 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:12,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:12,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:12,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:12,665 INFO L124 PetriNetUnfolderBase]: 986/1670 cut-off events. [2024-06-14 14:04:12,665 INFO L125 PetriNetUnfolderBase]: For 25624/25627 co-relation queries the response was YES. [2024-06-14 14:04:12,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9648 conditions, 1670 events. 986/1670 cut-off events. For 25624/25627 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8856 event pairs, 254 based on Foata normal form. 1/1664 useless extension candidates. Maximal degree in co-relation 9585. Up to 1427 conditions per place. [2024-06-14 14:04:12,679 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 46 changer transitions 0/170 dead transitions. [2024-06-14 14:04:12,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 170 transitions, 2102 flow [2024-06-14 14:04:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:04:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:04:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 14:04:12,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-14 14:04:12,681 INFO L175 Difference]: Start difference. First operand has 132 places, 158 transitions, 1744 flow. Second operand 5 states and 118 transitions. [2024-06-14 14:04:12,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 170 transitions, 2102 flow [2024-06-14 14:04:12,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 170 transitions, 1947 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-14 14:04:12,736 INFO L231 Difference]: Finished difference. Result has 129 places, 158 transitions, 1699 flow [2024-06-14 14:04:12,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1699, PETRI_PLACES=129, PETRI_TRANSITIONS=158} [2024-06-14 14:04:12,737 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-14 14:04:12,737 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 158 transitions, 1699 flow [2024-06-14 14:04:12,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:12,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:12,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:12,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:04:12,738 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:12,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash 147062433, now seen corresponding path program 6 times [2024-06-14 14:04:12,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:12,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840631656] [2024-06-14 14:04:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:12,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:13,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:13,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840631656] [2024-06-14 14:04:13,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840631656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:13,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:13,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:13,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139855656] [2024-06-14 14:04:13,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:13,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:13,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:13,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:13,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 158 transitions, 1699 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:13,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:13,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:13,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:13,329 INFO L124 PetriNetUnfolderBase]: 996/1687 cut-off events. [2024-06-14 14:04:13,329 INFO L125 PetriNetUnfolderBase]: For 27247/27247 co-relation queries the response was YES. [2024-06-14 14:04:13,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9811 conditions, 1687 events. 996/1687 cut-off events. For 27247/27247 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8977 event pairs, 236 based on Foata normal form. 2/1686 useless extension candidates. Maximal degree in co-relation 9748. Up to 1403 conditions per place. [2024-06-14 14:04:13,341 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 106 selfloop transitions, 78 changer transitions 0/190 dead transitions. [2024-06-14 14:04:13,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 190 transitions, 2274 flow [2024-06-14 14:04:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-14 14:04:13,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-14 14:04:13,342 INFO L175 Difference]: Start difference. First operand has 129 places, 158 transitions, 1699 flow. Second operand 11 states and 230 transitions. [2024-06-14 14:04:13,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 190 transitions, 2274 flow [2024-06-14 14:04:13,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 190 transitions, 2180 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:13,391 INFO L231 Difference]: Finished difference. Result has 136 places, 164 transitions, 1871 flow [2024-06-14 14:04:13,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1871, PETRI_PLACES=136, PETRI_TRANSITIONS=164} [2024-06-14 14:04:13,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-14 14:04:13,392 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 164 transitions, 1871 flow [2024-06-14 14:04:13,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:13,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:13,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:13,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:04:13,392 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:13,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1170738345, now seen corresponding path program 7 times [2024-06-14 14:04:13,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:13,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697555387] [2024-06-14 14:04:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:13,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:13,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:13,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697555387] [2024-06-14 14:04:13,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697555387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:13,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:13,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:13,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609515506] [2024-06-14 14:04:13,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:13,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:13,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:13,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:13,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:13,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 164 transitions, 1871 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:13,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:13,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:13,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:13,933 INFO L124 PetriNetUnfolderBase]: 1001/1694 cut-off events. [2024-06-14 14:04:13,933 INFO L125 PetriNetUnfolderBase]: For 28113/28113 co-relation queries the response was YES. [2024-06-14 14:04:13,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10151 conditions, 1694 events. 1001/1694 cut-off events. For 28113/28113 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8984 event pairs, 237 based on Foata normal form. 1/1692 useless extension candidates. Maximal degree in co-relation 10088. Up to 1409 conditions per place. [2024-06-14 14:04:13,946 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 106 selfloop transitions, 77 changer transitions 0/189 dead transitions. [2024-06-14 14:04:13,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 189 transitions, 2392 flow [2024-06-14 14:04:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 14:04:13,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-14 14:04:13,947 INFO L175 Difference]: Start difference. First operand has 136 places, 164 transitions, 1871 flow. Second operand 7 states and 162 transitions. [2024-06-14 14:04:13,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 189 transitions, 2392 flow [2024-06-14 14:04:13,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 2144 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-14 14:04:14,000 INFO L231 Difference]: Finished difference. Result has 135 places, 167 transitions, 1831 flow [2024-06-14 14:04:14,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1642, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1831, PETRI_PLACES=135, PETRI_TRANSITIONS=167} [2024-06-14 14:04:14,001 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-14 14:04:14,001 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 167 transitions, 1831 flow [2024-06-14 14:04:14,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:14,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:14,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:14,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:04:14,001 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:14,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash -438756515, now seen corresponding path program 8 times [2024-06-14 14:04:14,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:14,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407305557] [2024-06-14 14:04:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:14,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:14,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:14,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407305557] [2024-06-14 14:04:14,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407305557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:14,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:14,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:14,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599994300] [2024-06-14 14:04:14,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:14,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:14,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:14,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:14,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:14,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:14,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 167 transitions, 1831 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:14,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:14,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:14,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:14,537 INFO L124 PetriNetUnfolderBase]: 998/1690 cut-off events. [2024-06-14 14:04:14,537 INFO L125 PetriNetUnfolderBase]: For 28971/28971 co-relation queries the response was YES. [2024-06-14 14:04:14,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10064 conditions, 1690 events. 998/1690 cut-off events. For 28971/28971 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8977 event pairs, 236 based on Foata normal form. 1/1688 useless extension candidates. Maximal degree in co-relation 10000. Up to 1406 conditions per place. [2024-06-14 14:04:14,548 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 105 selfloop transitions, 80 changer transitions 0/191 dead transitions. [2024-06-14 14:04:14,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 191 transitions, 2264 flow [2024-06-14 14:04:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 14:04:14,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-14 14:04:14,550 INFO L175 Difference]: Start difference. First operand has 135 places, 167 transitions, 1831 flow. Second operand 10 states and 212 transitions. [2024-06-14 14:04:14,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 191 transitions, 2264 flow [2024-06-14 14:04:14,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 191 transitions, 2136 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:14,598 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1869 flow [2024-06-14 14:04:14,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1869, PETRI_PLACES=141, PETRI_TRANSITIONS=167} [2024-06-14 14:04:14,598 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-14 14:04:14,599 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1869 flow [2024-06-14 14:04:14,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:14,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:14,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:14,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:04:14,599 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:14,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:14,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1643631605, now seen corresponding path program 2 times [2024-06-14 14:04:14,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:14,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063064613] [2024-06-14 14:04:14,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:14,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063064613] [2024-06-14 14:04:14,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063064613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:14,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:14,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:14,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490761554] [2024-06-14 14:04:14,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:14,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:14,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:14,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:14,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:14,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:04:14,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 167 transitions, 1869 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:14,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:14,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:04:14,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:15,131 INFO L124 PetriNetUnfolderBase]: 985/1691 cut-off events. [2024-06-14 14:04:15,131 INFO L125 PetriNetUnfolderBase]: For 33720/33720 co-relation queries the response was YES. [2024-06-14 14:04:15,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10114 conditions, 1691 events. 985/1691 cut-off events. For 33720/33720 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9160 event pairs, 239 based on Foata normal form. 10/1691 useless extension candidates. Maximal degree in co-relation 10049. Up to 1386 conditions per place. [2024-06-14 14:04:15,143 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 136 selfloop transitions, 27 changer transitions 0/191 dead transitions. [2024-06-14 14:04:15,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 191 transitions, 2300 flow [2024-06-14 14:04:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 14:04:15,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-14 14:04:15,144 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1869 flow. Second operand 8 states and 175 transitions. [2024-06-14 14:04:15,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 191 transitions, 2300 flow [2024-06-14 14:04:15,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 191 transitions, 2086 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 14:04:15,201 INFO L231 Difference]: Finished difference. Result has 139 places, 168 transitions, 1731 flow [2024-06-14 14:04:15,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1731, PETRI_PLACES=139, PETRI_TRANSITIONS=168} [2024-06-14 14:04:15,201 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-14 14:04:15,201 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 168 transitions, 1731 flow [2024-06-14 14:04:15,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:15,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:15,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:15,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:04:15,202 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:15,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:15,202 INFO L85 PathProgramCache]: Analyzing trace with hash 520576039, now seen corresponding path program 3 times [2024-06-14 14:04:15,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:15,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718036772] [2024-06-14 14:04:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:15,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:15,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:15,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718036772] [2024-06-14 14:04:15,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718036772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:15,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:15,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:15,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088820513] [2024-06-14 14:04:15,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:15,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:15,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:15,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:15,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:15,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:04:15,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 168 transitions, 1731 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:15,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:15,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:04:15,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:15,769 INFO L124 PetriNetUnfolderBase]: 987/1697 cut-off events. [2024-06-14 14:04:15,769 INFO L125 PetriNetUnfolderBase]: For 32902/32902 co-relation queries the response was YES. [2024-06-14 14:04:15,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9982 conditions, 1697 events. 987/1697 cut-off events. For 32902/32902 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9172 event pairs, 233 based on Foata normal form. 8/1695 useless extension candidates. Maximal degree in co-relation 9916. Up to 1326 conditions per place. [2024-06-14 14:04:15,780 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 136 selfloop transitions, 31 changer transitions 0/195 dead transitions. [2024-06-14 14:04:15,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 195 transitions, 2196 flow [2024-06-14 14:04:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 14:04:15,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-14 14:04:15,781 INFO L175 Difference]: Start difference. First operand has 139 places, 168 transitions, 1731 flow. Second operand 8 states and 177 transitions. [2024-06-14 14:04:15,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 195 transitions, 2196 flow [2024-06-14 14:04:15,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 195 transitions, 2140 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:15,849 INFO L231 Difference]: Finished difference. Result has 141 places, 169 transitions, 1759 flow [2024-06-14 14:04:15,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1759, PETRI_PLACES=141, PETRI_TRANSITIONS=169} [2024-06-14 14:04:15,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-14 14:04:15,850 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 169 transitions, 1759 flow [2024-06-14 14:04:15,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:15,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:15,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:15,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:04:15,850 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:15,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash 10276749, now seen corresponding path program 1 times [2024-06-14 14:04:15,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:15,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215806494] [2024-06-14 14:04:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:15,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:16,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:16,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215806494] [2024-06-14 14:04:16,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215806494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:16,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:16,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932172215] [2024-06-14 14:04:16,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:16,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:16,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:16,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:16,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:16,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 169 transitions, 1759 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:16,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:16,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:16,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:16,365 INFO L124 PetriNetUnfolderBase]: 1089/1847 cut-off events. [2024-06-14 14:04:16,366 INFO L125 PetriNetUnfolderBase]: For 37136/37136 co-relation queries the response was YES. [2024-06-14 14:04:16,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10907 conditions, 1847 events. 1089/1847 cut-off events. For 37136/37136 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10027 event pairs, 258 based on Foata normal form. 6/1850 useless extension candidates. Maximal degree in co-relation 10840. Up to 1534 conditions per place. [2024-06-14 14:04:16,376 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 171 selfloop transitions, 26 changer transitions 0/203 dead transitions. [2024-06-14 14:04:16,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 203 transitions, 2376 flow [2024-06-14 14:04:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 14:04:16,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-14 14:04:16,377 INFO L175 Difference]: Start difference. First operand has 141 places, 169 transitions, 1759 flow. Second operand 7 states and 157 transitions. [2024-06-14 14:04:16,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 203 transitions, 2376 flow [2024-06-14 14:04:16,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 203 transitions, 2308 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:16,438 INFO L231 Difference]: Finished difference. Result has 144 places, 174 transitions, 1804 flow [2024-06-14 14:04:16,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1804, PETRI_PLACES=144, PETRI_TRANSITIONS=174} [2024-06-14 14:04:16,439 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-14 14:04:16,439 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 174 transitions, 1804 flow [2024-06-14 14:04:16,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:16,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:16,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:16,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:04:16,439 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:16,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:16,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2074708467, now seen corresponding path program 2 times [2024-06-14 14:04:16,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:16,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877700446] [2024-06-14 14:04:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:16,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:16,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:16,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877700446] [2024-06-14 14:04:16,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877700446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:16,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:16,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:16,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204719920] [2024-06-14 14:04:16,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:16,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:16,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:16,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:16,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:16,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:16,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 174 transitions, 1804 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:16,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:16,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:16,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:16,912 INFO L124 PetriNetUnfolderBase]: 1155/1949 cut-off events. [2024-06-14 14:04:16,912 INFO L125 PetriNetUnfolderBase]: For 42591/42591 co-relation queries the response was YES. [2024-06-14 14:04:16,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11697 conditions, 1949 events. 1155/1949 cut-off events. For 42591/42591 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10628 event pairs, 276 based on Foata normal form. 6/1952 useless extension candidates. Maximal degree in co-relation 11627. Up to 1684 conditions per place. [2024-06-14 14:04:16,926 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 169 selfloop transitions, 25 changer transitions 0/200 dead transitions. [2024-06-14 14:04:16,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 200 transitions, 2378 flow [2024-06-14 14:04:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 14:04:16,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:04:16,927 INFO L175 Difference]: Start difference. First operand has 144 places, 174 transitions, 1804 flow. Second operand 7 states and 154 transitions. [2024-06-14 14:04:16,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 200 transitions, 2378 flow [2024-06-14 14:04:16,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 200 transitions, 2348 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:16,996 INFO L231 Difference]: Finished difference. Result has 150 places, 177 transitions, 1862 flow [2024-06-14 14:04:16,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1862, PETRI_PLACES=150, PETRI_TRANSITIONS=177} [2024-06-14 14:04:16,996 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-14 14:04:16,997 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 177 transitions, 1862 flow [2024-06-14 14:04:16,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:16,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:16,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:16,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:04:16,997 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:16,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash -778912823, now seen corresponding path program 3 times [2024-06-14 14:04:16,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:16,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011227608] [2024-06-14 14:04:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:16,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:17,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:17,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011227608] [2024-06-14 14:04:17,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011227608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:17,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:17,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:17,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394429201] [2024-06-14 14:04:17,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:17,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:17,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:17,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:17,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:17,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:17,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 177 transitions, 1862 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:17,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:17,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:17,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:17,479 INFO L124 PetriNetUnfolderBase]: 1137/1923 cut-off events. [2024-06-14 14:04:17,479 INFO L125 PetriNetUnfolderBase]: For 42316/42316 co-relation queries the response was YES. [2024-06-14 14:04:17,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11561 conditions, 1923 events. 1137/1923 cut-off events. For 42316/42316 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10465 event pairs, 274 based on Foata normal form. 8/1928 useless extension candidates. Maximal degree in co-relation 11488. Up to 1706 conditions per place. [2024-06-14 14:04:17,493 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 167 selfloop transitions, 24 changer transitions 0/197 dead transitions. [2024-06-14 14:04:17,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 197 transitions, 2337 flow [2024-06-14 14:04:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 14:04:17,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:04:17,494 INFO L175 Difference]: Start difference. First operand has 150 places, 177 transitions, 1862 flow. Second operand 7 states and 150 transitions. [2024-06-14 14:04:17,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 197 transitions, 2337 flow [2024-06-14 14:04:17,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 197 transitions, 2305 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:17,580 INFO L231 Difference]: Finished difference. Result has 154 places, 178 transitions, 1897 flow [2024-06-14 14:04:17,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1897, PETRI_PLACES=154, PETRI_TRANSITIONS=178} [2024-06-14 14:04:17,580 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-14 14:04:17,580 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 178 transitions, 1897 flow [2024-06-14 14:04:17,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:17,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:17,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:17,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:04:17,581 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:17,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash 512957479, now seen corresponding path program 4 times [2024-06-14 14:04:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:17,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104334096] [2024-06-14 14:04:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:17,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:17,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:17,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104334096] [2024-06-14 14:04:17,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104334096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:17,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:17,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:17,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598026236] [2024-06-14 14:04:17,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:17,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:17,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:17,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:17,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:17,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:17,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 178 transitions, 1897 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:17,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:17,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:17,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:18,111 INFO L124 PetriNetUnfolderBase]: 1165/1967 cut-off events. [2024-06-14 14:04:18,111 INFO L125 PetriNetUnfolderBase]: For 44732/44732 co-relation queries the response was YES. [2024-06-14 14:04:18,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11914 conditions, 1967 events. 1165/1967 cut-off events. For 44732/44732 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10770 event pairs, 277 based on Foata normal form. 8/1972 useless extension candidates. Maximal degree in co-relation 11839. Up to 1756 conditions per place. [2024-06-14 14:04:18,126 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 173 selfloop transitions, 20 changer transitions 0/199 dead transitions. [2024-06-14 14:04:18,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 199 transitions, 2377 flow [2024-06-14 14:04:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:18,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 14:04:18,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-14 14:04:18,127 INFO L175 Difference]: Start difference. First operand has 154 places, 178 transitions, 1897 flow. Second operand 8 states and 165 transitions. [2024-06-14 14:04:18,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 199 transitions, 2377 flow [2024-06-14 14:04:18,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 199 transitions, 2332 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:18,204 INFO L231 Difference]: Finished difference. Result has 157 places, 179 transitions, 1910 flow [2024-06-14 14:04:18,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1910, PETRI_PLACES=157, PETRI_TRANSITIONS=179} [2024-06-14 14:04:18,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-14 14:04:18,204 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 179 transitions, 1910 flow [2024-06-14 14:04:18,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:18,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:18,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:18,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:04:18,205 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:18,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:18,205 INFO L85 PathProgramCache]: Analyzing trace with hash 313655689, now seen corresponding path program 5 times [2024-06-14 14:04:18,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:18,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799091389] [2024-06-14 14:04:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:18,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:18,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:18,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799091389] [2024-06-14 14:04:18,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799091389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:18,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:18,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:18,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594896060] [2024-06-14 14:04:18,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:18,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:18,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:18,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:18,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:18,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:18,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 179 transitions, 1910 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:18,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:18,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:18,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:18,706 INFO L124 PetriNetUnfolderBase]: 1180/1996 cut-off events. [2024-06-14 14:04:18,706 INFO L125 PetriNetUnfolderBase]: For 46091/46091 co-relation queries the response was YES. [2024-06-14 14:04:18,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12088 conditions, 1996 events. 1180/1996 cut-off events. For 46091/46091 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10976 event pairs, 283 based on Foata normal form. 8/2001 useless extension candidates. Maximal degree in co-relation 12012. Up to 1781 conditions per place. [2024-06-14 14:04:18,722 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 173 selfloop transitions, 19 changer transitions 0/198 dead transitions. [2024-06-14 14:04:18,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 198 transitions, 2386 flow [2024-06-14 14:04:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 14:04:18,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-14 14:04:18,723 INFO L175 Difference]: Start difference. First operand has 157 places, 179 transitions, 1910 flow. Second operand 6 states and 133 transitions. [2024-06-14 14:04:18,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 198 transitions, 2386 flow [2024-06-14 14:04:18,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 198 transitions, 2345 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:18,807 INFO L231 Difference]: Finished difference. Result has 157 places, 180 transitions, 1927 flow [2024-06-14 14:04:18,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1927, PETRI_PLACES=157, PETRI_TRANSITIONS=180} [2024-06-14 14:04:18,808 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-14 14:04:18,808 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 180 transitions, 1927 flow [2024-06-14 14:04:18,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:18,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:18,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:18,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:04:18,808 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:18,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:18,808 INFO L85 PathProgramCache]: Analyzing trace with hash 313507819, now seen corresponding path program 6 times [2024-06-14 14:04:18,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:18,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907073495] [2024-06-14 14:04:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:18,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:19,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:19,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907073495] [2024-06-14 14:04:19,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907073495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:19,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:19,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:19,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330045705] [2024-06-14 14:04:19,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:19,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:19,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:19,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:19,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:19,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:19,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 180 transitions, 1927 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:19,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:19,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:19,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:19,354 INFO L124 PetriNetUnfolderBase]: 1167/1977 cut-off events. [2024-06-14 14:04:19,354 INFO L125 PetriNetUnfolderBase]: For 44069/44069 co-relation queries the response was YES. [2024-06-14 14:04:19,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11876 conditions, 1977 events. 1167/1977 cut-off events. For 44069/44069 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10872 event pairs, 262 based on Foata normal form. 6/1980 useless extension candidates. Maximal degree in co-relation 11799. Up to 1682 conditions per place. [2024-06-14 14:04:19,370 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 177 selfloop transitions, 23 changer transitions 0/206 dead transitions. [2024-06-14 14:04:19,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 206 transitions, 2459 flow [2024-06-14 14:04:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:19,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 14:04:19,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-14 14:04:19,371 INFO L175 Difference]: Start difference. First operand has 157 places, 180 transitions, 1927 flow. Second operand 6 states and 139 transitions. [2024-06-14 14:04:19,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 206 transitions, 2459 flow [2024-06-14 14:04:19,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 206 transitions, 2414 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:19,452 INFO L231 Difference]: Finished difference. Result has 160 places, 182 transitions, 1970 flow [2024-06-14 14:04:19,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1970, PETRI_PLACES=160, PETRI_TRANSITIONS=182} [2024-06-14 14:04:19,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-14 14:04:19,452 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 182 transitions, 1970 flow [2024-06-14 14:04:19,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:19,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:19,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:19,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:04:19,453 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:19,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:19,453 INFO L85 PathProgramCache]: Analyzing trace with hash 520581991, now seen corresponding path program 1 times [2024-06-14 14:04:19,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:19,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983823435] [2024-06-14 14:04:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:19,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:19,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:19,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983823435] [2024-06-14 14:04:19,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983823435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:19,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:19,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:04:19,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957925547] [2024-06-14 14:04:19,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:19,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:04:19,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:19,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:04:19,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:04:19,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:19,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 182 transitions, 1970 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:19,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:19,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:19,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:19,977 INFO L124 PetriNetUnfolderBase]: 1154/1950 cut-off events. [2024-06-14 14:04:19,977 INFO L125 PetriNetUnfolderBase]: For 42377/42377 co-relation queries the response was YES. [2024-06-14 14:04:19,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11695 conditions, 1950 events. 1154/1950 cut-off events. For 42377/42377 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10636 event pairs, 254 based on Foata normal form. 6/1953 useless extension candidates. Maximal degree in co-relation 11616. Up to 1681 conditions per place. [2024-06-14 14:04:19,992 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 175 selfloop transitions, 24 changer transitions 0/205 dead transitions. [2024-06-14 14:04:19,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 205 transitions, 2475 flow [2024-06-14 14:04:19,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 14:04:19,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-14 14:04:19,993 INFO L175 Difference]: Start difference. First operand has 160 places, 182 transitions, 1970 flow. Second operand 8 states and 167 transitions. [2024-06-14 14:04:19,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 205 transitions, 2475 flow [2024-06-14 14:04:20,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 205 transitions, 2399 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:20,071 INFO L231 Difference]: Finished difference. Result has 163 places, 182 transitions, 1946 flow [2024-06-14 14:04:20,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1946, PETRI_PLACES=163, PETRI_TRANSITIONS=182} [2024-06-14 14:04:20,072 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-14 14:04:20,072 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 182 transitions, 1946 flow [2024-06-14 14:04:20,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:20,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:20,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:20,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 14:04:20,072 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:20,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:20,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1117877817, now seen corresponding path program 1 times [2024-06-14 14:04:20,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:20,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188335213] [2024-06-14 14:04:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:20,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:20,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188335213] [2024-06-14 14:04:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188335213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:20,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:20,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:20,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948635206] [2024-06-14 14:04:20,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:20,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:20,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:20,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:20,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:20,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:20,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 182 transitions, 1946 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:20,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:20,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:20,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:20,715 INFO L124 PetriNetUnfolderBase]: 1169/1974 cut-off events. [2024-06-14 14:04:20,715 INFO L125 PetriNetUnfolderBase]: For 41539/41542 co-relation queries the response was YES. [2024-06-14 14:04:20,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11767 conditions, 1974 events. 1169/1974 cut-off events. For 41539/41542 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10806 event pairs, 285 based on Foata normal form. 1/1968 useless extension candidates. Maximal degree in co-relation 11688. Up to 1694 conditions per place. [2024-06-14 14:04:20,730 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 129 selfloop transitions, 70 changer transitions 0/205 dead transitions. [2024-06-14 14:04:20,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 205 transitions, 2486 flow [2024-06-14 14:04:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:20,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 14:04:20,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-14 14:04:20,731 INFO L175 Difference]: Start difference. First operand has 163 places, 182 transitions, 1946 flow. Second operand 7 states and 157 transitions. [2024-06-14 14:04:20,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 205 transitions, 2486 flow [2024-06-14 14:04:20,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 205 transitions, 2418 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:04:20,809 INFO L231 Difference]: Finished difference. Result has 164 places, 191 transitions, 2170 flow [2024-06-14 14:04:20,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2170, PETRI_PLACES=164, PETRI_TRANSITIONS=191} [2024-06-14 14:04:20,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-14 14:04:20,810 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 191 transitions, 2170 flow [2024-06-14 14:04:20,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:20,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:20,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:20,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 14:04:20,810 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:20,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash 375554783, now seen corresponding path program 1 times [2024-06-14 14:04:20,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:20,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532206780] [2024-06-14 14:04:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:20,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:21,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:21,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532206780] [2024-06-14 14:04:21,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532206780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:21,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:21,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:21,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976326622] [2024-06-14 14:04:21,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:21,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:21,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:21,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:21,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:21,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:21,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 191 transitions, 2170 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:21,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:21,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:21,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:21,344 INFO L124 PetriNetUnfolderBase]: 1189/2010 cut-off events. [2024-06-14 14:04:21,344 INFO L125 PetriNetUnfolderBase]: For 48144/48147 co-relation queries the response was YES. [2024-06-14 14:04:21,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12215 conditions, 2010 events. 1189/2010 cut-off events. For 48144/48147 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 11002 event pairs, 212 based on Foata normal form. 6/2009 useless extension candidates. Maximal degree in co-relation 12135. Up to 1645 conditions per place. [2024-06-14 14:04:21,360 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 181 selfloop transitions, 29 changer transitions 0/216 dead transitions. [2024-06-14 14:04:21,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 216 transitions, 2800 flow [2024-06-14 14:04:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 14:04:21,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-14 14:04:21,361 INFO L175 Difference]: Start difference. First operand has 164 places, 191 transitions, 2170 flow. Second operand 7 states and 157 transitions. [2024-06-14 14:04:21,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 216 transitions, 2800 flow [2024-06-14 14:04:21,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 216 transitions, 2623 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:21,453 INFO L231 Difference]: Finished difference. Result has 166 places, 192 transitions, 2075 flow [2024-06-14 14:04:21,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2075, PETRI_PLACES=166, PETRI_TRANSITIONS=192} [2024-06-14 14:04:21,454 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-14 14:04:21,454 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 192 transitions, 2075 flow [2024-06-14 14:04:21,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:21,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:21,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:21,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 14:04:21,454 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:21,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2146633815, now seen corresponding path program 2 times [2024-06-14 14:04:21,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:21,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203906759] [2024-06-14 14:04:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:21,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:21,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:21,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203906759] [2024-06-14 14:04:21,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203906759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:21,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:21,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:21,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352822429] [2024-06-14 14:04:21,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:21,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:21,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:21,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:21,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:21,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:21,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 192 transitions, 2075 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:21,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:21,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:21,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:22,076 INFO L124 PetriNetUnfolderBase]: 1176/1991 cut-off events. [2024-06-14 14:04:22,076 INFO L125 PetriNetUnfolderBase]: For 44342/44345 co-relation queries the response was YES. [2024-06-14 14:04:22,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 1991 events. 1176/1991 cut-off events. For 44342/44345 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10904 event pairs, 201 based on Foata normal form. 6/1990 useless extension candidates. Maximal degree in co-relation 11729. Up to 1639 conditions per place. [2024-06-14 14:04:22,092 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 178 selfloop transitions, 29 changer transitions 0/213 dead transitions. [2024-06-14 14:04:22,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 213 transitions, 2603 flow [2024-06-14 14:04:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 14:04:22,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-14 14:04:22,094 INFO L175 Difference]: Start difference. First operand has 166 places, 192 transitions, 2075 flow. Second operand 6 states and 139 transitions. [2024-06-14 14:04:22,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 213 transitions, 2603 flow [2024-06-14 14:04:22,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 213 transitions, 2542 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:22,210 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 2078 flow [2024-06-14 14:04:22,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2078, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2024-06-14 14:04:22,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-14 14:04:22,212 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 2078 flow [2024-06-14 14:04:22,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:22,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:22,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:22,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 14:04:22,213 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:22,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash -736899555, now seen corresponding path program 2 times [2024-06-14 14:04:22,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:22,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535501302] [2024-06-14 14:04:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:22,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:22,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:22,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535501302] [2024-06-14 14:04:22,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535501302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:22,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:22,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:22,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24591778] [2024-06-14 14:04:22,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:22,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:22,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:22,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:22,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:22,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:22,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 2078 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:22,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:22,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:22,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:22,786 INFO L124 PetriNetUnfolderBase]: 1189/2013 cut-off events. [2024-06-14 14:04:22,787 INFO L125 PetriNetUnfolderBase]: For 43796/43799 co-relation queries the response was YES. [2024-06-14 14:04:22,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12025 conditions, 2013 events. 1189/2013 cut-off events. For 43796/43799 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11097 event pairs, 284 based on Foata normal form. 1/2007 useless extension candidates. Maximal degree in co-relation 11943. Up to 1656 conditions per place. [2024-06-14 14:04:22,802 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 113 selfloop transitions, 100 changer transitions 0/219 dead transitions. [2024-06-14 14:04:22,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 219 transitions, 2752 flow [2024-06-14 14:04:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 14:04:22,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 14:04:22,804 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 2078 flow. Second operand 10 states and 210 transitions. [2024-06-14 14:04:22,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 219 transitions, 2752 flow [2024-06-14 14:04:22,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 219 transitions, 2686 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:22,903 INFO L231 Difference]: Finished difference. Result has 174 places, 198 transitions, 2350 flow [2024-06-14 14:04:22,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2350, PETRI_PLACES=174, PETRI_TRANSITIONS=198} [2024-06-14 14:04:22,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-14 14:04:22,903 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 198 transitions, 2350 flow [2024-06-14 14:04:22,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:22,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:22,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:22,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 14:04:22,904 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:22,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:22,904 INFO L85 PathProgramCache]: Analyzing trace with hash -728557455, now seen corresponding path program 3 times [2024-06-14 14:04:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:22,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679773104] [2024-06-14 14:04:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:22,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:23,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:23,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679773104] [2024-06-14 14:04:23,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679773104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:23,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:23,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:23,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366819896] [2024-06-14 14:04:23,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:23,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:23,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:23,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:23,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:23,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:23,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 198 transitions, 2350 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:23,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:23,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:23,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:23,454 INFO L124 PetriNetUnfolderBase]: 1202/2035 cut-off events. [2024-06-14 14:04:23,455 INFO L125 PetriNetUnfolderBase]: For 46914/46917 co-relation queries the response was YES. [2024-06-14 14:04:23,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12580 conditions, 2035 events. 1202/2035 cut-off events. For 46914/46917 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11247 event pairs, 284 based on Foata normal form. 1/2029 useless extension candidates. Maximal degree in co-relation 12498. Up to 1671 conditions per place. [2024-06-14 14:04:23,469 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 115 selfloop transitions, 101 changer transitions 0/222 dead transitions. [2024-06-14 14:04:23,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 222 transitions, 3108 flow [2024-06-14 14:04:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:04:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:04:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 14:04:23,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-06-14 14:04:23,471 INFO L175 Difference]: Start difference. First operand has 174 places, 198 transitions, 2350 flow. Second operand 9 states and 194 transitions. [2024-06-14 14:04:23,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 222 transitions, 3108 flow [2024-06-14 14:04:23,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 222 transitions, 2859 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:23,574 INFO L231 Difference]: Finished difference. Result has 177 places, 204 transitions, 2446 flow [2024-06-14 14:04:23,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2446, PETRI_PLACES=177, PETRI_TRANSITIONS=204} [2024-06-14 14:04:23,575 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-14 14:04:23,575 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 204 transitions, 2446 flow [2024-06-14 14:04:23,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:23,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:23,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:23,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 14:04:23,576 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:23,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:23,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1967569237, now seen corresponding path program 4 times [2024-06-14 14:04:23,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:23,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677084584] [2024-06-14 14:04:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:23,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:23,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:23,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677084584] [2024-06-14 14:04:23,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677084584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:23,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:23,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:23,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224759840] [2024-06-14 14:04:23,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:23,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:23,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:23,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:23,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:23,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:23,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 204 transitions, 2446 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:23,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:23,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:23,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:24,120 INFO L124 PetriNetUnfolderBase]: 1199/2031 cut-off events. [2024-06-14 14:04:24,121 INFO L125 PetriNetUnfolderBase]: For 45350/45353 co-relation queries the response was YES. [2024-06-14 14:04:24,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12348 conditions, 2031 events. 1199/2031 cut-off events. For 45350/45353 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11213 event pairs, 284 based on Foata normal form. 1/2025 useless extension candidates. Maximal degree in co-relation 12264. Up to 1668 conditions per place. [2024-06-14 14:04:24,138 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 103 changer transitions 0/223 dead transitions. [2024-06-14 14:04:24,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 223 transitions, 3000 flow [2024-06-14 14:04:24,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-14 14:04:24,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159090909090909 [2024-06-14 14:04:24,140 INFO L175 Difference]: Start difference. First operand has 177 places, 204 transitions, 2446 flow. Second operand 11 states and 227 transitions. [2024-06-14 14:04:24,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 223 transitions, 3000 flow [2024-06-14 14:04:24,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 223 transitions, 2794 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:24,246 INFO L231 Difference]: Finished difference. Result has 183 places, 204 transitions, 2452 flow [2024-06-14 14:04:24,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2452, PETRI_PLACES=183, PETRI_TRANSITIONS=204} [2024-06-14 14:04:24,246 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-14 14:04:24,246 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 204 transitions, 2452 flow [2024-06-14 14:04:24,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:24,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:24,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:24,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 14:04:24,247 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:24,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:24,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2049303645, now seen corresponding path program 5 times [2024-06-14 14:04:24,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:24,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557073568] [2024-06-14 14:04:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:24,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:24,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:24,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557073568] [2024-06-14 14:04:24,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557073568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:24,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:24,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:24,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906785834] [2024-06-14 14:04:24,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:24,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:24,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:24,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:24,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:24,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:24,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 204 transitions, 2452 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:24,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:24,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:24,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:24,780 INFO L124 PetriNetUnfolderBase]: 1228/2083 cut-off events. [2024-06-14 14:04:24,781 INFO L125 PetriNetUnfolderBase]: For 48234/48237 co-relation queries the response was YES. [2024-06-14 14:04:24,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12730 conditions, 2083 events. 1228/2083 cut-off events. For 48234/48237 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11588 event pairs, 284 based on Foata normal form. 1/2077 useless extension candidates. Maximal degree in co-relation 12645. Up to 1777 conditions per place. [2024-06-14 14:04:24,799 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 164 selfloop transitions, 64 changer transitions 0/234 dead transitions. [2024-06-14 14:04:24,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 234 transitions, 3205 flow [2024-06-14 14:04:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:24,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 14:04:24,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-14 14:04:24,800 INFO L175 Difference]: Start difference. First operand has 183 places, 204 transitions, 2452 flow. Second operand 7 states and 159 transitions. [2024-06-14 14:04:24,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 234 transitions, 3205 flow [2024-06-14 14:04:24,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 234 transitions, 2949 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 14:04:24,901 INFO L231 Difference]: Finished difference. Result has 181 places, 216 transitions, 2536 flow [2024-06-14 14:04:24,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2220, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2536, PETRI_PLACES=181, PETRI_TRANSITIONS=216} [2024-06-14 14:04:24,901 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-14 14:04:24,902 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 216 transitions, 2536 flow [2024-06-14 14:04:24,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:24,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:24,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:24,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 14:04:24,902 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:24,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:24,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2049313875, now seen corresponding path program 6 times [2024-06-14 14:04:24,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:24,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494651744] [2024-06-14 14:04:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:24,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:25,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:25,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494651744] [2024-06-14 14:04:25,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494651744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:25,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:25,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:25,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752339529] [2024-06-14 14:04:25,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:25,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:25,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:25,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:25,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:25,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:25,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 216 transitions, 2536 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:25,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:25,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:25,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:25,458 INFO L124 PetriNetUnfolderBase]: 1233/2092 cut-off events. [2024-06-14 14:04:25,459 INFO L125 PetriNetUnfolderBase]: For 49946/49949 co-relation queries the response was YES. [2024-06-14 14:04:25,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12783 conditions, 2092 events. 1233/2092 cut-off events. For 49946/49949 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11654 event pairs, 284 based on Foata normal form. 1/2086 useless extension candidates. Maximal degree in co-relation 12696. Up to 1783 conditions per place. [2024-06-14 14:04:25,476 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 67 changer transitions 0/234 dead transitions. [2024-06-14 14:04:25,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 234 transitions, 3166 flow [2024-06-14 14:04:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 14:04:25,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-14 14:04:25,478 INFO L175 Difference]: Start difference. First operand has 181 places, 216 transitions, 2536 flow. Second operand 7 states and 156 transitions. [2024-06-14 14:04:25,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 234 transitions, 3166 flow [2024-06-14 14:04:25,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 234 transitions, 3068 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:25,604 INFO L231 Difference]: Finished difference. Result has 185 places, 219 transitions, 2636 flow [2024-06-14 14:04:25,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2438, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2636, PETRI_PLACES=185, PETRI_TRANSITIONS=219} [2024-06-14 14:04:25,604 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-14 14:04:25,604 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 219 transitions, 2636 flow [2024-06-14 14:04:25,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:25,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:25,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:25,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 14:04:25,605 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:25,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:25,605 INFO L85 PathProgramCache]: Analyzing trace with hash -745903873, now seen corresponding path program 7 times [2024-06-14 14:04:25,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:25,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000841602] [2024-06-14 14:04:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:25,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:25,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:25,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000841602] [2024-06-14 14:04:25,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000841602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:25,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:25,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:25,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30411550] [2024-06-14 14:04:25,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:25,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:25,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:25,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:25,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:25,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 219 transitions, 2636 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:25,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:25,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:25,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:26,209 INFO L124 PetriNetUnfolderBase]: 1230/2088 cut-off events. [2024-06-14 14:04:26,210 INFO L125 PetriNetUnfolderBase]: For 50870/50873 co-relation queries the response was YES. [2024-06-14 14:04:26,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12864 conditions, 2088 events. 1230/2088 cut-off events. For 50870/50873 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11615 event pairs, 284 based on Foata normal form. 1/2082 useless extension candidates. Maximal degree in co-relation 12775. Up to 1780 conditions per place. [2024-06-14 14:04:26,230 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 67 changer transitions 0/234 dead transitions. [2024-06-14 14:04:26,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 234 transitions, 3128 flow [2024-06-14 14:04:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 14:04:26,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540625 [2024-06-14 14:04:26,231 INFO L175 Difference]: Start difference. First operand has 185 places, 219 transitions, 2636 flow. Second operand 8 states and 173 transitions. [2024-06-14 14:04:26,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 234 transitions, 3128 flow [2024-06-14 14:04:26,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 234 transitions, 2975 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:26,395 INFO L231 Difference]: Finished difference. Result has 189 places, 219 transitions, 2623 flow [2024-06-14 14:04:26,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2623, PETRI_PLACES=189, PETRI_TRANSITIONS=219} [2024-06-14 14:04:26,396 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-14 14:04:26,396 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 219 transitions, 2623 flow [2024-06-14 14:04:26,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:26,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:26,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:26,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 14:04:26,397 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:26,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:26,397 INFO L85 PathProgramCache]: Analyzing trace with hash -104208565, now seen corresponding path program 8 times [2024-06-14 14:04:26,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:26,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464461642] [2024-06-14 14:04:26,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:26,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:26,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:26,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464461642] [2024-06-14 14:04:26,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464461642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:26,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:26,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:26,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099154211] [2024-06-14 14:04:26,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:26,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:26,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:26,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:26,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:26,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:26,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 219 transitions, 2623 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:26,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:26,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:26,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:26,990 INFO L124 PetriNetUnfolderBase]: 1235/2098 cut-off events. [2024-06-14 14:04:26,991 INFO L125 PetriNetUnfolderBase]: For 52617/52617 co-relation queries the response was YES. [2024-06-14 14:04:27,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12953 conditions, 2098 events. 1235/2098 cut-off events. For 52617/52617 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 11733 event pairs, 267 based on Foata normal form. 1/2096 useless extension candidates. Maximal degree in co-relation 12863. Up to 1675 conditions per place. [2024-06-14 14:04:27,008 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 131 changer transitions 0/255 dead transitions. [2024-06-14 14:04:27,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3406 flow [2024-06-14 14:04:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:04:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:04:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-14 14:04:27,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-06-14 14:04:27,009 INFO L175 Difference]: Start difference. First operand has 189 places, 219 transitions, 2623 flow. Second operand 12 states and 251 transitions. [2024-06-14 14:04:27,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3406 flow [2024-06-14 14:04:27,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 255 transitions, 3258 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:27,160 INFO L231 Difference]: Finished difference. Result has 195 places, 225 transitions, 2873 flow [2024-06-14 14:04:27,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2873, PETRI_PLACES=195, PETRI_TRANSITIONS=225} [2024-06-14 14:04:27,160 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-14 14:04:27,160 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 225 transitions, 2873 flow [2024-06-14 14:04:27,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:27,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:27,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:27,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 14:04:27,161 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:27,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1121171515, now seen corresponding path program 9 times [2024-06-14 14:04:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:27,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120631007] [2024-06-14 14:04:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:27,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:27,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:27,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120631007] [2024-06-14 14:04:27,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120631007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:27,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:27,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:27,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190289681] [2024-06-14 14:04:27,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:27,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:27,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:27,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:27,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:27,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 225 transitions, 2873 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:27,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:27,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:27,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:27,795 INFO L124 PetriNetUnfolderBase]: 1240/2106 cut-off events. [2024-06-14 14:04:27,795 INFO L125 PetriNetUnfolderBase]: For 56922/56925 co-relation queries the response was YES. [2024-06-14 14:04:27,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13450 conditions, 2106 events. 1240/2106 cut-off events. For 56922/56925 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11760 event pairs, 284 based on Foata normal form. 1/2100 useless extension candidates. Maximal degree in co-relation 13359. Up to 1783 conditions per place. [2024-06-14 14:04:27,812 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 171 selfloop transitions, 70 changer transitions 0/247 dead transitions. [2024-06-14 14:04:27,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 247 transitions, 3548 flow [2024-06-14 14:04:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 14:04:27,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-14 14:04:27,813 INFO L175 Difference]: Start difference. First operand has 195 places, 225 transitions, 2873 flow. Second operand 8 states and 174 transitions. [2024-06-14 14:04:27,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 247 transitions, 3548 flow [2024-06-14 14:04:27,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 247 transitions, 3418 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:27,968 INFO L231 Difference]: Finished difference. Result has 197 places, 228 transitions, 2954 flow [2024-06-14 14:04:27,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2954, PETRI_PLACES=197, PETRI_TRANSITIONS=228} [2024-06-14 14:04:27,968 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-14 14:04:27,969 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 228 transitions, 2954 flow [2024-06-14 14:04:27,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:27,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:27,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:27,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 14:04:27,969 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:27,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:27,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1121181745, now seen corresponding path program 10 times [2024-06-14 14:04:27,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:27,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900914042] [2024-06-14 14:04:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:27,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:28,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:28,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900914042] [2024-06-14 14:04:28,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900914042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:28,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:28,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:28,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338779665] [2024-06-14 14:04:28,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:28,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:28,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:28,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:28,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 228 transitions, 2954 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:28,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:28,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:28,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:28,614 INFO L124 PetriNetUnfolderBase]: 1237/2102 cut-off events. [2024-06-14 14:04:28,614 INFO L125 PetriNetUnfolderBase]: For 56142/56145 co-relation queries the response was YES. [2024-06-14 14:04:28,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13277 conditions, 2102 events. 1237/2102 cut-off events. For 56142/56145 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11759 event pairs, 284 based on Foata normal form. 1/2096 useless extension candidates. Maximal degree in co-relation 13184. Up to 1780 conditions per place. [2024-06-14 14:04:28,633 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 169 selfloop transitions, 66 changer transitions 0/241 dead transitions. [2024-06-14 14:04:28,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 241 transitions, 3456 flow [2024-06-14 14:04:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 14:04:28,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:04:28,634 INFO L175 Difference]: Start difference. First operand has 197 places, 228 transitions, 2954 flow. Second operand 6 states and 135 transitions. [2024-06-14 14:04:28,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 241 transitions, 3456 flow [2024-06-14 14:04:28,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 241 transitions, 3187 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 14:04:28,809 INFO L231 Difference]: Finished difference. Result has 195 places, 228 transitions, 2827 flow [2024-06-14 14:04:28,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2827, PETRI_PLACES=195, PETRI_TRANSITIONS=228} [2024-06-14 14:04:28,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-14 14:04:28,810 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 228 transitions, 2827 flow [2024-06-14 14:04:28,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:28,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:28,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:28,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 14:04:28,810 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:28,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:28,810 INFO L85 PathProgramCache]: Analyzing trace with hash -882783413, now seen corresponding path program 11 times [2024-06-14 14:04:28,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:28,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684761450] [2024-06-14 14:04:28,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:28,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:29,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:29,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684761450] [2024-06-14 14:04:29,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684761450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:29,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:29,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:29,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393277528] [2024-06-14 14:04:29,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:29,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:29,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:29,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:29,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:29,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:29,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 228 transitions, 2827 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:29,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:29,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:29,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:29,394 INFO L124 PetriNetUnfolderBase]: 1242/2112 cut-off events. [2024-06-14 14:04:29,394 INFO L125 PetriNetUnfolderBase]: For 55540/55540 co-relation queries the response was YES. [2024-06-14 14:04:29,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13250 conditions, 2112 events. 1242/2112 cut-off events. For 55540/55540 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 11809 event pairs, 267 based on Foata normal form. 1/2110 useless extension candidates. Maximal degree in co-relation 13157. Up to 1737 conditions per place. [2024-06-14 14:04:29,414 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 101 changer transitions 0/254 dead transitions. [2024-06-14 14:04:29,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 254 transitions, 3536 flow [2024-06-14 14:04:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 14:04:29,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-14 14:04:29,415 INFO L175 Difference]: Start difference. First operand has 195 places, 228 transitions, 2827 flow. Second operand 8 states and 179 transitions. [2024-06-14 14:04:29,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 254 transitions, 3536 flow [2024-06-14 14:04:29,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 254 transitions, 3396 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:29,601 INFO L231 Difference]: Finished difference. Result has 197 places, 231 transitions, 2961 flow [2024-06-14 14:04:29,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2961, PETRI_PLACES=197, PETRI_TRANSITIONS=231} [2024-06-14 14:04:29,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-14 14:04:29,602 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 231 transitions, 2961 flow [2024-06-14 14:04:29,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:29,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:29,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:29,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 14:04:29,602 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:29,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:29,603 INFO L85 PathProgramCache]: Analyzing trace with hash -722978723, now seen corresponding path program 12 times [2024-06-14 14:04:29,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:29,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813033492] [2024-06-14 14:04:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:29,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:29,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:29,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813033492] [2024-06-14 14:04:29,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813033492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:29,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:29,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:29,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846666147] [2024-06-14 14:04:29,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:29,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:29,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:29,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:29,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:29,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:29,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 231 transitions, 2961 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:29,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:29,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:29,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:30,228 INFO L124 PetriNetUnfolderBase]: 1247/2121 cut-off events. [2024-06-14 14:04:30,228 INFO L125 PetriNetUnfolderBase]: For 56075/56075 co-relation queries the response was YES. [2024-06-14 14:04:30,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13411 conditions, 2121 events. 1247/2121 cut-off events. For 56075/56075 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11899 event pairs, 266 based on Foata normal form. 1/2119 useless extension candidates. Maximal degree in co-relation 13318. Up to 1743 conditions per place. [2024-06-14 14:04:30,248 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 108 changer transitions 0/261 dead transitions. [2024-06-14 14:04:30,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 261 transitions, 3698 flow [2024-06-14 14:04:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:04:30,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:04:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-14 14:04:30,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-14 14:04:30,250 INFO L175 Difference]: Start difference. First operand has 197 places, 231 transitions, 2961 flow. Second operand 12 states and 248 transitions. [2024-06-14 14:04:30,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 261 transitions, 3698 flow [2024-06-14 14:04:30,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 261 transitions, 3506 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:30,457 INFO L231 Difference]: Finished difference. Result has 204 places, 234 transitions, 3061 flow [2024-06-14 14:04:30,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3061, PETRI_PLACES=204, PETRI_TRANSITIONS=234} [2024-06-14 14:04:30,458 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-14 14:04:30,458 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 234 transitions, 3061 flow [2024-06-14 14:04:30,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:30,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:30,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:30,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 14:04:30,459 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:30,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:30,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1278432907, now seen corresponding path program 13 times [2024-06-14 14:04:30,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:30,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15428546] [2024-06-14 14:04:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:30,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:30,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:30,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15428546] [2024-06-14 14:04:30,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15428546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:30,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:30,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:30,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630289956] [2024-06-14 14:04:30,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:30,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:30,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:30,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:30,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:30,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:30,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 234 transitions, 3061 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:30,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:30,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:30,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:31,035 INFO L124 PetriNetUnfolderBase]: 1244/2117 cut-off events. [2024-06-14 14:04:31,035 INFO L125 PetriNetUnfolderBase]: For 57339/57339 co-relation queries the response was YES. [2024-06-14 14:04:31,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13365 conditions, 2117 events. 1244/2117 cut-off events. For 57339/57339 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11875 event pairs, 266 based on Foata normal form. 1/2115 useless extension candidates. Maximal degree in co-relation 13271. Up to 1740 conditions per place. [2024-06-14 14:04:31,054 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 146 selfloop transitions, 107 changer transitions 0/259 dead transitions. [2024-06-14 14:04:31,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 259 transitions, 3632 flow [2024-06-14 14:04:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-14 14:04:31,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204545454545455 [2024-06-14 14:04:31,058 INFO L175 Difference]: Start difference. First operand has 204 places, 234 transitions, 3061 flow. Second operand 11 states and 229 transitions. [2024-06-14 14:04:31,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 259 transitions, 3632 flow [2024-06-14 14:04:31,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 259 transitions, 3245 flow, removed 50 selfloop flow, removed 10 redundant places. [2024-06-14 14:04:31,248 INFO L231 Difference]: Finished difference. Result has 205 places, 234 transitions, 2894 flow [2024-06-14 14:04:31,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2894, PETRI_PLACES=205, PETRI_TRANSITIONS=234} [2024-06-14 14:04:31,249 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-14 14:04:31,249 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 234 transitions, 2894 flow [2024-06-14 14:04:31,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:31,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:31,249 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, 1] [2024-06-14 14:04:31,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 14:04:31,250 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:31,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash 748023141, now seen corresponding path program 1 times [2024-06-14 14:04:31,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:31,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521162992] [2024-06-14 14:04:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:31,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:31,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:31,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521162992] [2024-06-14 14:04:31,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521162992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:31,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:31,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:31,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580870343] [2024-06-14 14:04:31,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:31,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:31,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:31,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:31,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:31,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 234 transitions, 2894 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:31,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:31,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:31,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:31,914 INFO L124 PetriNetUnfolderBase]: 1343/2267 cut-off events. [2024-06-14 14:04:31,915 INFO L125 PetriNetUnfolderBase]: For 79564/79567 co-relation queries the response was YES. [2024-06-14 14:04:31,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14657 conditions, 2267 events. 1343/2267 cut-off events. For 79564/79567 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12837 event pairs, 181 based on Foata normal form. 6/2266 useless extension candidates. Maximal degree in co-relation 14563. Up to 1474 conditions per place. [2024-06-14 14:04:31,974 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 202 selfloop transitions, 61 changer transitions 0/269 dead transitions. [2024-06-14 14:04:31,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 269 transitions, 3806 flow [2024-06-14 14:04:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:04:31,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-14 14:04:31,976 INFO L175 Difference]: Start difference. First operand has 205 places, 234 transitions, 2894 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:04:31,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 269 transitions, 3806 flow [2024-06-14 14:04:32,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 269 transitions, 3516 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 14:04:32,241 INFO L231 Difference]: Finished difference. Result has 201 places, 237 transitions, 2780 flow [2024-06-14 14:04:32,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2780, PETRI_PLACES=201, PETRI_TRANSITIONS=237} [2024-06-14 14:04:32,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-14 14:04:32,242 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 237 transitions, 2780 flow [2024-06-14 14:04:32,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:32,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:32,243 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, 1] [2024-06-14 14:04:32,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 14:04:32,243 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:32,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:32,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1242709743, now seen corresponding path program 2 times [2024-06-14 14:04:32,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:32,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107697238] [2024-06-14 14:04:32,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:32,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:32,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:32,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107697238] [2024-06-14 14:04:32,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107697238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:32,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:32,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:32,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342145511] [2024-06-14 14:04:32,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:32,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:32,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:32,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:32,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:32,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 237 transitions, 2780 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:32,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:32,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:32,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:32,855 INFO L124 PetriNetUnfolderBase]: 1330/2254 cut-off events. [2024-06-14 14:04:32,855 INFO L125 PetriNetUnfolderBase]: For 74713/74716 co-relation queries the response was YES. [2024-06-14 14:04:32,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14351 conditions, 2254 events. 1330/2254 cut-off events. For 74713/74716 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12751 event pairs, 248 based on Foata normal form. 6/2253 useless extension candidates. Maximal degree in co-relation 14256. Up to 1952 conditions per place. [2024-06-14 14:04:32,876 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 231 selfloop transitions, 18 changer transitions 0/255 dead transitions. [2024-06-14 14:04:32,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 255 transitions, 3340 flow [2024-06-14 14:04:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:32,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 14:04:32,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:04:32,877 INFO L175 Difference]: Start difference. First operand has 201 places, 237 transitions, 2780 flow. Second operand 6 states and 132 transitions. [2024-06-14 14:04:32,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 255 transitions, 3340 flow [2024-06-14 14:04:33,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 255 transitions, 3277 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 14:04:33,106 INFO L231 Difference]: Finished difference. Result has 205 places, 237 transitions, 2757 flow [2024-06-14 14:04:33,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2757, PETRI_PLACES=205, PETRI_TRANSITIONS=237} [2024-06-14 14:04:33,107 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-14 14:04:33,107 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 237 transitions, 2757 flow [2024-06-14 14:04:33,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:33,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:33,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:33,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 14:04:33,108 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:33,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash -661500233, now seen corresponding path program 3 times [2024-06-14 14:04:33,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:33,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973794060] [2024-06-14 14:04:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:33,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:33,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973794060] [2024-06-14 14:04:33,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973794060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:33,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:33,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:33,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982935352] [2024-06-14 14:04:33,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:33,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:33,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:33,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:33,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:33,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:33,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 237 transitions, 2757 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:33,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:33,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:33,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:33,789 INFO L124 PetriNetUnfolderBase]: 1358/2298 cut-off events. [2024-06-14 14:04:33,789 INFO L125 PetriNetUnfolderBase]: For 80506/80509 co-relation queries the response was YES. [2024-06-14 14:04:33,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14661 conditions, 2298 events. 1358/2298 cut-off events. For 80506/80509 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13096 event pairs, 253 based on Foata normal form. 8/2299 useless extension candidates. Maximal degree in co-relation 14564. Up to 1677 conditions per place. [2024-06-14 14:04:33,810 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 200 selfloop transitions, 57 changer transitions 0/263 dead transitions. [2024-06-14 14:04:33,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 263 transitions, 3523 flow [2024-06-14 14:04:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:04:33,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-14 14:04:33,812 INFO L175 Difference]: Start difference. First operand has 205 places, 237 transitions, 2757 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:04:33,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 263 transitions, 3523 flow [2024-06-14 14:04:34,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 263 transitions, 3454 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:34,063 INFO L231 Difference]: Finished difference. Result has 205 places, 238 transitions, 2829 flow [2024-06-14 14:04:34,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2829, PETRI_PLACES=205, PETRI_TRANSITIONS=238} [2024-06-14 14:04:34,063 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-14 14:04:34,063 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 238 transitions, 2829 flow [2024-06-14 14:04:34,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:34,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:34,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:34,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 14:04:34,064 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:34,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash -653881673, now seen corresponding path program 4 times [2024-06-14 14:04:34,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:34,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992969949] [2024-06-14 14:04:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:34,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:34,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:34,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992969949] [2024-06-14 14:04:34,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992969949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:34,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:34,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:34,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906215255] [2024-06-14 14:04:34,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:34,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:34,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:34,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:34,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:34,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 238 transitions, 2829 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:34,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:34,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:34,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:34,683 INFO L124 PetriNetUnfolderBase]: 1340/2270 cut-off events. [2024-06-14 14:04:34,683 INFO L125 PetriNetUnfolderBase]: For 74627/74630 co-relation queries the response was YES. [2024-06-14 14:04:34,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14266 conditions, 2270 events. 1340/2270 cut-off events. For 74627/74630 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12916 event pairs, 314 based on Foata normal form. 8/2269 useless extension candidates. Maximal degree in co-relation 14168. Up to 1926 conditions per place. [2024-06-14 14:04:34,701 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 200 selfloop transitions, 49 changer transitions 0/255 dead transitions. [2024-06-14 14:04:34,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 255 transitions, 3407 flow [2024-06-14 14:04:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:34,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 14:04:34,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-14 14:04:34,704 INFO L175 Difference]: Start difference. First operand has 205 places, 238 transitions, 2829 flow. Second operand 6 states and 139 transitions. [2024-06-14 14:04:34,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 255 transitions, 3407 flow [2024-06-14 14:04:34,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 255 transitions, 3280 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:34,930 INFO L231 Difference]: Finished difference. Result has 206 places, 238 transitions, 2811 flow [2024-06-14 14:04:34,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2811, PETRI_PLACES=206, PETRI_TRANSITIONS=238} [2024-06-14 14:04:34,931 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-14 14:04:34,931 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 238 transitions, 2811 flow [2024-06-14 14:04:34,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:34,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:34,932 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, 1] [2024-06-14 14:04:34,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 14:04:34,932 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:34,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash 599188569, now seen corresponding path program 5 times [2024-06-14 14:04:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:34,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520261888] [2024-06-14 14:04:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:34,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:35,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:35,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520261888] [2024-06-14 14:04:35,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520261888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:35,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:35,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:35,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456632201] [2024-06-14 14:04:35,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:35,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:35,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:35,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:35,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:35,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 238 transitions, 2811 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:35,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:35,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:35,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:35,543 INFO L124 PetriNetUnfolderBase]: 1401/2367 cut-off events. [2024-06-14 14:04:35,543 INFO L125 PetriNetUnfolderBase]: For 82150/82153 co-relation queries the response was YES. [2024-06-14 14:04:35,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15030 conditions, 2367 events. 1401/2367 cut-off events. For 82150/82153 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 13544 event pairs, 325 based on Foata normal form. 8/2368 useless extension candidates. Maximal degree in co-relation 14932. Up to 1829 conditions per place. [2024-06-14 14:04:35,568 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 203 selfloop transitions, 60 changer transitions 0/269 dead transitions. [2024-06-14 14:04:35,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 269 transitions, 3615 flow [2024-06-14 14:04:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 14:04:35,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-14 14:04:35,570 INFO L175 Difference]: Start difference. First operand has 206 places, 238 transitions, 2811 flow. Second operand 7 states and 163 transitions. [2024-06-14 14:04:35,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 269 transitions, 3615 flow [2024-06-14 14:04:35,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 269 transitions, 3459 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:04:35,805 INFO L231 Difference]: Finished difference. Result has 206 places, 240 transitions, 2815 flow [2024-06-14 14:04:35,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2657, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2815, PETRI_PLACES=206, PETRI_TRANSITIONS=240} [2024-06-14 14:04:35,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-14 14:04:35,806 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 240 transitions, 2815 flow [2024-06-14 14:04:35,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:35,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:35,806 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, 1] [2024-06-14 14:04:35,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 14:04:35,807 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:35,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:35,807 INFO L85 PathProgramCache]: Analyzing trace with hash 606807129, now seen corresponding path program 6 times [2024-06-14 14:04:35,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:35,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175832512] [2024-06-14 14:04:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:35,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:36,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:36,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175832512] [2024-06-14 14:04:36,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175832512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:36,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:36,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:36,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159456331] [2024-06-14 14:04:36,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:36,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:36,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:36,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:36,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:36,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 240 transitions, 2815 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:36,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:36,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:36,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:36,374 INFO L124 PetriNetUnfolderBase]: 1429/2411 cut-off events. [2024-06-14 14:04:36,374 INFO L125 PetriNetUnfolderBase]: For 82646/82649 co-relation queries the response was YES. [2024-06-14 14:04:36,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15230 conditions, 2411 events. 1429/2411 cut-off events. For 82646/82649 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 13875 event pairs, 345 based on Foata normal form. 8/2412 useless extension candidates. Maximal degree in co-relation 15133. Up to 2049 conditions per place. [2024-06-14 14:04:36,394 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 196 selfloop transitions, 60 changer transitions 0/262 dead transitions. [2024-06-14 14:04:36,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 262 transitions, 3435 flow [2024-06-14 14:04:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 14:04:36,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-14 14:04:36,396 INFO L175 Difference]: Start difference. First operand has 206 places, 240 transitions, 2815 flow. Second operand 7 states and 156 transitions. [2024-06-14 14:04:36,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 262 transitions, 3435 flow [2024-06-14 14:04:36,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 262 transitions, 3352 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 14:04:36,619 INFO L231 Difference]: Finished difference. Result has 210 places, 241 transitions, 2877 flow [2024-06-14 14:04:36,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2877, PETRI_PLACES=210, PETRI_TRANSITIONS=241} [2024-06-14 14:04:36,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-14 14:04:36,620 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 241 transitions, 2877 flow [2024-06-14 14:04:36,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:36,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:36,621 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, 1] [2024-06-14 14:04:36,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 14:04:36,621 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:36,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1110770859, now seen corresponding path program 7 times [2024-06-14 14:04:36,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:36,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578823987] [2024-06-14 14:04:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:36,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:36,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:36,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578823987] [2024-06-14 14:04:36,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578823987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:36,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:36,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:36,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532714768] [2024-06-14 14:04:36,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:36,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:36,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:36,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:36,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:36,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 241 transitions, 2877 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:36,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:36,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:36,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:37,326 INFO L124 PetriNetUnfolderBase]: 1457/2455 cut-off events. [2024-06-14 14:04:37,326 INFO L125 PetriNetUnfolderBase]: For 85409/85412 co-relation queries the response was YES. [2024-06-14 14:04:37,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15613 conditions, 2455 events. 1457/2455 cut-off events. For 85409/85412 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14185 event pairs, 349 based on Foata normal form. 8/2456 useless extension candidates. Maximal degree in co-relation 15514. Up to 2093 conditions per place. [2024-06-14 14:04:37,348 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 194 selfloop transitions, 60 changer transitions 0/260 dead transitions. [2024-06-14 14:04:37,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 260 transitions, 3483 flow [2024-06-14 14:04:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 14:04:37,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:04:37,350 INFO L175 Difference]: Start difference. First operand has 210 places, 241 transitions, 2877 flow. Second operand 7 states and 154 transitions. [2024-06-14 14:04:37,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 260 transitions, 3483 flow [2024-06-14 14:04:37,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 260 transitions, 3364 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:37,638 INFO L231 Difference]: Finished difference. Result has 212 places, 242 transitions, 2901 flow [2024-06-14 14:04:37,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2901, PETRI_PLACES=212, PETRI_TRANSITIONS=242} [2024-06-14 14:04:37,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-14 14:04:37,639 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 242 transitions, 2901 flow [2024-06-14 14:04:37,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:37,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:37,640 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, 1] [2024-06-14 14:04:37,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 14:04:37,640 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:37,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:37,640 INFO L85 PathProgramCache]: Analyzing trace with hash -896105549, now seen corresponding path program 8 times [2024-06-14 14:04:37,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:37,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359756965] [2024-06-14 14:04:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:37,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:37,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:37,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359756965] [2024-06-14 14:04:37,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359756965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:37,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:37,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:37,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897014068] [2024-06-14 14:04:37,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:37,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:37,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:37,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:37,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:37,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:37,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 242 transitions, 2901 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:37,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:37,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:37,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:38,263 INFO L124 PetriNetUnfolderBase]: 1439/2429 cut-off events. [2024-06-14 14:04:38,264 INFO L125 PetriNetUnfolderBase]: For 78886/78889 co-relation queries the response was YES. [2024-06-14 14:04:38,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15120 conditions, 2429 events. 1439/2429 cut-off events. For 78886/78889 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14043 event pairs, 329 based on Foata normal form. 8/2430 useless extension candidates. Maximal degree in co-relation 15020. Up to 1985 conditions per place. [2024-06-14 14:04:38,285 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 211 selfloop transitions, 48 changer transitions 0/265 dead transitions. [2024-06-14 14:04:38,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 265 transitions, 3515 flow [2024-06-14 14:04:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 14:04:38,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-14 14:04:38,286 INFO L175 Difference]: Start difference. First operand has 212 places, 242 transitions, 2901 flow. Second operand 6 states and 143 transitions. [2024-06-14 14:04:38,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 265 transitions, 3515 flow [2024-06-14 14:04:38,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 265 transitions, 3392 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:38,530 INFO L231 Difference]: Finished difference. Result has 213 places, 242 transitions, 2886 flow [2024-06-14 14:04:38,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2886, PETRI_PLACES=213, PETRI_TRANSITIONS=242} [2024-06-14 14:04:38,530 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-14 14:04:38,530 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 242 transitions, 2886 flow [2024-06-14 14:04:38,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:38,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:38,531 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, 1] [2024-06-14 14:04:38,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 14:04:38,531 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:38,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash 776445019, now seen corresponding path program 1 times [2024-06-14 14:04:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:38,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886522147] [2024-06-14 14:04:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:38,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:38,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:38,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886522147] [2024-06-14 14:04:38,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886522147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:38,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:38,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:38,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462080872] [2024-06-14 14:04:38,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:38,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:38,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:38,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:38,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:38,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:38,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 242 transitions, 2886 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:38,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:38,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:38,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:39,209 INFO L124 PetriNetUnfolderBase]: 1459/2465 cut-off events. [2024-06-14 14:04:39,209 INFO L125 PetriNetUnfolderBase]: For 78502/78505 co-relation queries the response was YES. [2024-06-14 14:04:39,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15349 conditions, 2465 events. 1459/2465 cut-off events. For 78502/78505 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14279 event pairs, 273 based on Foata normal form. 6/2464 useless extension candidates. Maximal degree in co-relation 15248. Up to 1432 conditions per place. [2024-06-14 14:04:39,230 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 197 selfloop transitions, 71 changer transitions 0/274 dead transitions. [2024-06-14 14:04:39,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 274 transitions, 3696 flow [2024-06-14 14:04:39,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 14:04:39,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-14 14:04:39,231 INFO L175 Difference]: Start difference. First operand has 213 places, 242 transitions, 2886 flow. Second operand 7 states and 165 transitions. [2024-06-14 14:04:39,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 274 transitions, 3696 flow [2024-06-14 14:04:39,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 274 transitions, 3581 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:39,488 INFO L231 Difference]: Finished difference. Result has 214 places, 243 transitions, 2937 flow [2024-06-14 14:04:39,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2937, PETRI_PLACES=214, PETRI_TRANSITIONS=243} [2024-06-14 14:04:39,488 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-14 14:04:39,488 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 243 transitions, 2937 flow [2024-06-14 14:04:39,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:39,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:39,489 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, 1] [2024-06-14 14:04:39,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 14:04:39,489 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:39,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:39,489 INFO L85 PathProgramCache]: Analyzing trace with hash 776713789, now seen corresponding path program 2 times [2024-06-14 14:04:39,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:39,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866626563] [2024-06-14 14:04:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:39,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:39,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:39,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866626563] [2024-06-14 14:04:39,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866626563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:39,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:39,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:39,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113079183] [2024-06-14 14:04:39,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:39,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:39,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:39,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:39,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:39,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:39,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 243 transitions, 2937 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:39,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:39,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:39,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:40,047 INFO L124 PetriNetUnfolderBase]: 1479/2501 cut-off events. [2024-06-14 14:04:40,047 INFO L125 PetriNetUnfolderBase]: For 78988/78991 co-relation queries the response was YES. [2024-06-14 14:04:40,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15693 conditions, 2501 events. 1479/2501 cut-off events. For 78988/78991 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 14525 event pairs, 261 based on Foata normal form. 6/2500 useless extension candidates. Maximal degree in co-relation 15592. Up to 1444 conditions per place. [2024-06-14 14:04:40,071 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 194 selfloop transitions, 73 changer transitions 0/273 dead transitions. [2024-06-14 14:04:40,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 273 transitions, 3761 flow [2024-06-14 14:04:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 14:04:40,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-14 14:04:40,073 INFO L175 Difference]: Start difference. First operand has 214 places, 243 transitions, 2937 flow. Second operand 7 states and 164 transitions. [2024-06-14 14:04:40,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 273 transitions, 3761 flow [2024-06-14 14:04:40,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 273 transitions, 3533 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:40,339 INFO L231 Difference]: Finished difference. Result has 215 places, 244 transitions, 2879 flow [2024-06-14 14:04:40,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2879, PETRI_PLACES=215, PETRI_TRANSITIONS=244} [2024-06-14 14:04:40,340 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-14 14:04:40,340 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 244 transitions, 2879 flow [2024-06-14 14:04:40,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:40,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:40,340 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, 1] [2024-06-14 14:04:40,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 14:04:40,341 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:40,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash 776714130, now seen corresponding path program 1 times [2024-06-14 14:04:40,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:40,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334712877] [2024-06-14 14:04:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:40,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:40,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:40,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334712877] [2024-06-14 14:04:40,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334712877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:40,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:40,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:40,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898949746] [2024-06-14 14:04:40,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:40,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:40,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:40,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:40,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 244 transitions, 2879 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:40,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:40,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:40,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:40,999 INFO L124 PetriNetUnfolderBase]: 1586/2681 cut-off events. [2024-06-14 14:04:40,999 INFO L125 PetriNetUnfolderBase]: For 93057/93063 co-relation queries the response was YES. [2024-06-14 14:04:41,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16718 conditions, 2681 events. 1586/2681 cut-off events. For 93057/93063 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15806 event pairs, 312 based on Foata normal form. 10/2686 useless extension candidates. Maximal degree in co-relation 16618. Up to 2016 conditions per place. [2024-06-14 14:04:41,025 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 197 selfloop transitions, 79 changer transitions 0/282 dead transitions. [2024-06-14 14:04:41,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 282 transitions, 3780 flow [2024-06-14 14:04:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:04:41,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:04:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 14:04:41,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-14 14:04:41,026 INFO L175 Difference]: Start difference. First operand has 215 places, 244 transitions, 2879 flow. Second operand 9 states and 196 transitions. [2024-06-14 14:04:41,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 282 transitions, 3780 flow [2024-06-14 14:04:41,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 282 transitions, 3670 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:41,396 INFO L231 Difference]: Finished difference. Result has 222 places, 252 transitions, 3096 flow [2024-06-14 14:04:41,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2775, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3096, PETRI_PLACES=222, PETRI_TRANSITIONS=252} [2024-06-14 14:04:41,396 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-14 14:04:41,396 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 252 transitions, 3096 flow [2024-06-14 14:04:41,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:41,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:41,397 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, 1] [2024-06-14 14:04:41,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 14:04:41,397 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:41,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:41,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1110586409, now seen corresponding path program 3 times [2024-06-14 14:04:41,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:41,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519065158] [2024-06-14 14:04:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:41,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:41,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:41,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519065158] [2024-06-14 14:04:41,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519065158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:41,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:41,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:41,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404034881] [2024-06-14 14:04:41,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:41,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:41,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:41,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:41,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 252 transitions, 3096 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:41,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:41,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:41,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:42,071 INFO L124 PetriNetUnfolderBase]: 1606/2710 cut-off events. [2024-06-14 14:04:42,072 INFO L125 PetriNetUnfolderBase]: For 97103/97106 co-relation queries the response was YES. [2024-06-14 14:04:42,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17182 conditions, 2710 events. 1606/2710 cut-off events. For 97103/97106 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15984 event pairs, 382 based on Foata normal form. 6/2705 useless extension candidates. Maximal degree in co-relation 17079. Up to 2214 conditions per place. [2024-06-14 14:04:42,095 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 203 selfloop transitions, 65 changer transitions 0/274 dead transitions. [2024-06-14 14:04:42,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 274 transitions, 3754 flow [2024-06-14 14:04:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 14:04:42,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-14 14:04:42,100 INFO L175 Difference]: Start difference. First operand has 222 places, 252 transitions, 3096 flow. Second operand 7 states and 157 transitions. [2024-06-14 14:04:42,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 274 transitions, 3754 flow [2024-06-14 14:04:42,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 274 transitions, 3660 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:42,458 INFO L231 Difference]: Finished difference. Result has 224 places, 253 transitions, 3153 flow [2024-06-14 14:04:42,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3153, PETRI_PLACES=224, PETRI_TRANSITIONS=253} [2024-06-14 14:04:42,459 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-14 14:04:42,459 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 253 transitions, 3153 flow [2024-06-14 14:04:42,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:42,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:42,459 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, 1] [2024-06-14 14:04:42,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 14:04:42,459 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:42,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:42,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1110586068, now seen corresponding path program 2 times [2024-06-14 14:04:42,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:42,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253052674] [2024-06-14 14:04:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:42,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:42,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:42,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253052674] [2024-06-14 14:04:42,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253052674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:42,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:42,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:42,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747861532] [2024-06-14 14:04:42,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:42,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:42,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:42,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:42,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:42,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:42,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 253 transitions, 3153 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:42,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:42,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:42,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:43,125 INFO L124 PetriNetUnfolderBase]: 1672/2817 cut-off events. [2024-06-14 14:04:43,125 INFO L125 PetriNetUnfolderBase]: For 110109/110115 co-relation queries the response was YES. [2024-06-14 14:04:43,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18378 conditions, 2817 events. 1672/2817 cut-off events. For 110109/110115 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 16686 event pairs, 384 based on Foata normal form. 10/2822 useless extension candidates. Maximal degree in co-relation 18274. Up to 2353 conditions per place. [2024-06-14 14:04:43,151 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 204 selfloop transitions, 71 changer transitions 0/281 dead transitions. [2024-06-14 14:04:43,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 281 transitions, 3966 flow [2024-06-14 14:04:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 14:04:43,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 14:04:43,153 INFO L175 Difference]: Start difference. First operand has 224 places, 253 transitions, 3153 flow. Second operand 10 states and 210 transitions. [2024-06-14 14:04:43,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 281 transitions, 3966 flow [2024-06-14 14:04:43,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 281 transitions, 3835 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:43,619 INFO L231 Difference]: Finished difference. Result has 230 places, 256 transitions, 3236 flow [2024-06-14 14:04:43,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3024, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3236, PETRI_PLACES=230, PETRI_TRANSITIONS=256} [2024-06-14 14:04:43,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-14 14:04:43,620 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 256 transitions, 3236 flow [2024-06-14 14:04:43,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:43,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:43,620 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, 1] [2024-06-14 14:04:43,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 14:04:43,621 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:43,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:43,621 INFO L85 PathProgramCache]: Analyzing trace with hash 865427760, now seen corresponding path program 3 times [2024-06-14 14:04:43,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:43,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347787806] [2024-06-14 14:04:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:43,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:43,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:43,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347787806] [2024-06-14 14:04:43,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347787806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:43,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:43,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:43,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045205899] [2024-06-14 14:04:43,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:43,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:43,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:43,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:43,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 256 transitions, 3236 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:43,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:43,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:43,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:44,294 INFO L124 PetriNetUnfolderBase]: 1654/2793 cut-off events. [2024-06-14 14:04:44,295 INFO L125 PetriNetUnfolderBase]: For 104409/104415 co-relation queries the response was YES. [2024-06-14 14:04:44,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17931 conditions, 2793 events. 1654/2793 cut-off events. For 104409/104415 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 16612 event pairs, 392 based on Foata normal form. 12/2800 useless extension candidates. Maximal degree in co-relation 17825. Up to 2407 conditions per place. [2024-06-14 14:04:44,323 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 205 selfloop transitions, 65 changer transitions 0/276 dead transitions. [2024-06-14 14:04:44,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 276 transitions, 3858 flow [2024-06-14 14:04:44,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:04:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:04:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 14:04:44,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 14:04:44,325 INFO L175 Difference]: Start difference. First operand has 230 places, 256 transitions, 3236 flow. Second operand 9 states and 189 transitions. [2024-06-14 14:04:44,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 276 transitions, 3858 flow [2024-06-14 14:04:44,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 276 transitions, 3760 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 14:04:44,665 INFO L231 Difference]: Finished difference. Result has 232 places, 256 transitions, 3278 flow [2024-06-14 14:04:44,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3278, PETRI_PLACES=232, PETRI_TRANSITIONS=256} [2024-06-14 14:04:44,665 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-14 14:04:44,665 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 256 transitions, 3278 flow [2024-06-14 14:04:44,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:44,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:44,666 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, 1] [2024-06-14 14:04:44,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 14:04:44,666 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:44,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1653539536, now seen corresponding path program 4 times [2024-06-14 14:04:44,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:44,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212849596] [2024-06-14 14:04:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:44,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:44,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212849596] [2024-06-14 14:04:44,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212849596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:44,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:44,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:44,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585357496] [2024-06-14 14:04:44,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:44,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:44,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:44,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:44,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:44,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:44,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 256 transitions, 3278 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:44,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:44,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:44,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:45,400 INFO L124 PetriNetUnfolderBase]: 1758/2966 cut-off events. [2024-06-14 14:04:45,400 INFO L125 PetriNetUnfolderBase]: For 145313/145316 co-relation queries the response was YES. [2024-06-14 14:04:45,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19020 conditions, 2966 events. 1758/2966 cut-off events. For 145313/145316 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 17839 event pairs, 442 based on Foata normal form. 34/2993 useless extension candidates. Maximal degree in co-relation 18913. Up to 2441 conditions per place. [2024-06-14 14:04:45,430 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 212 selfloop transitions, 53 changer transitions 6/277 dead transitions. [2024-06-14 14:04:45,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 277 transitions, 3941 flow [2024-06-14 14:04:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 14:04:45,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:04:45,432 INFO L175 Difference]: Start difference. First operand has 232 places, 256 transitions, 3278 flow. Second operand 7 states and 160 transitions. [2024-06-14 14:04:45,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 277 transitions, 3941 flow [2024-06-14 14:04:45,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 277 transitions, 3817 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 14:04:45,760 INFO L231 Difference]: Finished difference. Result has 232 places, 253 transitions, 3246 flow [2024-06-14 14:04:45,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3154, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3246, PETRI_PLACES=232, PETRI_TRANSITIONS=253} [2024-06-14 14:04:45,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-14 14:04:45,760 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 253 transitions, 3246 flow [2024-06-14 14:04:45,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:45,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:45,761 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, 1] [2024-06-14 14:04:45,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 14:04:45,761 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:45,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash -895920758, now seen corresponding path program 5 times [2024-06-14 14:04:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:45,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042722974] [2024-06-14 14:04:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:45,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:45,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042722974] [2024-06-14 14:04:45,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042722974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:45,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:45,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:45,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780114222] [2024-06-14 14:04:45,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:45,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:45,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:45,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:46,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:46,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 253 transitions, 3246 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:46,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:46,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:46,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:46,587 INFO L124 PetriNetUnfolderBase]: 1961/3305 cut-off events. [2024-06-14 14:04:46,587 INFO L125 PetriNetUnfolderBase]: For 197789/197792 co-relation queries the response was YES. [2024-06-14 14:04:46,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22907 conditions, 3305 events. 1961/3305 cut-off events. For 197789/197792 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20246 event pairs, 398 based on Foata normal form. 30/3328 useless extension candidates. Maximal degree in co-relation 22799. Up to 2258 conditions per place. [2024-06-14 14:04:46,620 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 216 selfloop transitions, 60 changer transitions 7/289 dead transitions. [2024-06-14 14:04:46,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 289 transitions, 4208 flow [2024-06-14 14:04:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 14:04:46,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-14 14:04:46,621 INFO L175 Difference]: Start difference. First operand has 232 places, 253 transitions, 3246 flow. Second operand 7 states and 169 transitions. [2024-06-14 14:04:46,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 289 transitions, 4208 flow [2024-06-14 14:04:47,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 289 transitions, 4100 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:47,099 INFO L231 Difference]: Finished difference. Result has 235 places, 255 transitions, 3346 flow [2024-06-14 14:04:47,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3346, PETRI_PLACES=235, PETRI_TRANSITIONS=255} [2024-06-14 14:04:47,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-14 14:04:47,099 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 255 transitions, 3346 flow [2024-06-14 14:04:47,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:47,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:47,099 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, 1] [2024-06-14 14:04:47,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 14:04:47,100 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:47,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash -890410508, now seen corresponding path program 6 times [2024-06-14 14:04:47,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:47,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694764306] [2024-06-14 14:04:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:47,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:47,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694764306] [2024-06-14 14:04:47,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694764306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:47,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:47,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:47,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205838476] [2024-06-14 14:04:47,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:47,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:47,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:47,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:47,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:47,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:47,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 255 transitions, 3346 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:47,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:47,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:47,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:47,818 INFO L124 PetriNetUnfolderBase]: 1791/3017 cut-off events. [2024-06-14 14:04:47,818 INFO L125 PetriNetUnfolderBase]: For 156370/156373 co-relation queries the response was YES. [2024-06-14 14:04:47,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19825 conditions, 3017 events. 1791/3017 cut-off events. For 156370/156373 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 18122 event pairs, 446 based on Foata normal form. 34/3044 useless extension candidates. Maximal degree in co-relation 19715. Up to 2502 conditions per place. [2024-06-14 14:04:47,847 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 218 selfloop transitions, 46 changer transitions 6/276 dead transitions. [2024-06-14 14:04:47,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 276 transitions, 3990 flow [2024-06-14 14:04:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 14:04:47,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-14 14:04:47,849 INFO L175 Difference]: Start difference. First operand has 235 places, 255 transitions, 3346 flow. Second operand 8 states and 177 transitions. [2024-06-14 14:04:47,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 276 transitions, 3990 flow [2024-06-14 14:04:48,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 276 transitions, 3866 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:48,227 INFO L231 Difference]: Finished difference. Result has 237 places, 251 transitions, 3279 flow [2024-06-14 14:04:48,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3279, PETRI_PLACES=237, PETRI_TRANSITIONS=251} [2024-06-14 14:04:48,227 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-14 14:04:48,228 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 251 transitions, 3279 flow [2024-06-14 14:04:48,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:48,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:48,228 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, 1] [2024-06-14 14:04:48,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 14:04:48,228 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:48,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:48,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1653687747, now seen corresponding path program 4 times [2024-06-14 14:04:48,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:48,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320437414] [2024-06-14 14:04:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:48,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:48,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:48,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320437414] [2024-06-14 14:04:48,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320437414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:48,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:48,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:48,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804366313] [2024-06-14 14:04:48,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:48,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:48,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:48,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:48,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:48,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:48,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 251 transitions, 3279 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:48,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:48,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:48,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:48,889 INFO L124 PetriNetUnfolderBase]: 1695/2861 cut-off events. [2024-06-14 14:04:48,889 INFO L125 PetriNetUnfolderBase]: For 99740/99743 co-relation queries the response was YES. [2024-06-14 14:04:48,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18529 conditions, 2861 events. 1695/2861 cut-off events. For 99740/99743 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 17088 event pairs, 284 based on Foata normal form. 6/2860 useless extension candidates. Maximal degree in co-relation 18420. Up to 2080 conditions per place. [2024-06-14 14:04:48,915 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 215 selfloop transitions, 56 changer transitions 0/277 dead transitions. [2024-06-14 14:04:48,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 277 transitions, 3943 flow [2024-06-14 14:04:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:04:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:04:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:04:48,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-14 14:04:48,916 INFO L175 Difference]: Start difference. First operand has 237 places, 251 transitions, 3279 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:04:48,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 277 transitions, 3943 flow [2024-06-14 14:04:49,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 277 transitions, 3801 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 14:04:49,333 INFO L231 Difference]: Finished difference. Result has 236 places, 251 transitions, 3261 flow [2024-06-14 14:04:49,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3261, PETRI_PLACES=236, PETRI_TRANSITIONS=251} [2024-06-14 14:04:49,333 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-14 14:04:49,334 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 251 transitions, 3261 flow [2024-06-14 14:04:49,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:49,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:49,334 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, 1] [2024-06-14 14:04:49,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 14:04:49,334 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:49,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash -688846586, now seen corresponding path program 1 times [2024-06-14 14:04:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:49,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046690487] [2024-06-14 14:04:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:49,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:49,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:49,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046690487] [2024-06-14 14:04:49,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046690487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:49,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:49,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090993544] [2024-06-14 14:04:49,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:49,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:49,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:49,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:49,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 251 transitions, 3261 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:49,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:49,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:49,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:50,067 INFO L124 PetriNetUnfolderBase]: 1803/3063 cut-off events. [2024-06-14 14:04:50,067 INFO L125 PetriNetUnfolderBase]: For 140329/140332 co-relation queries the response was YES. [2024-06-14 14:04:50,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19199 conditions, 3063 events. 1803/3063 cut-off events. For 140329/140332 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 18583 event pairs, 389 based on Foata normal form. 30/3086 useless extension candidates. Maximal degree in co-relation 19089. Up to 2375 conditions per place. [2024-06-14 14:04:50,096 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 51 changer transitions 9/281 dead transitions. [2024-06-14 14:04:50,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 281 transitions, 4020 flow [2024-06-14 14:04:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 14:04:50,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-14 14:04:50,097 INFO L175 Difference]: Start difference. First operand has 236 places, 251 transitions, 3261 flow. Second operand 8 states and 181 transitions. [2024-06-14 14:04:50,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 281 transitions, 4020 flow [2024-06-14 14:04:50,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 281 transitions, 3850 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:04:50,495 INFO L231 Difference]: Finished difference. Result has 238 places, 250 transitions, 3223 flow [2024-06-14 14:04:50,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3223, PETRI_PLACES=238, PETRI_TRANSITIONS=250} [2024-06-14 14:04:50,495 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-14 14:04:50,495 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 250 transitions, 3223 flow [2024-06-14 14:04:50,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:50,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:50,496 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, 1] [2024-06-14 14:04:50,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 14:04:50,496 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:50,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1706246418, now seen corresponding path program 7 times [2024-06-14 14:04:50,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:50,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018447908] [2024-06-14 14:04:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:50,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:50,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018447908] [2024-06-14 14:04:50,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018447908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:50,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:50,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:50,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316460277] [2024-06-14 14:04:50,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:50,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:50,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:50,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:50,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:50,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 250 transitions, 3223 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:50,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:50,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:50,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:51,257 INFO L124 PetriNetUnfolderBase]: 1786/3017 cut-off events. [2024-06-14 14:04:51,257 INFO L125 PetriNetUnfolderBase]: For 122135/122141 co-relation queries the response was YES. [2024-06-14 14:04:51,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19789 conditions, 3017 events. 1786/3017 cut-off events. For 122135/122141 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 18122 event pairs, 319 based on Foata normal form. 10/3022 useless extension candidates. Maximal degree in co-relation 19678. Up to 2318 conditions per place. [2024-06-14 14:04:51,286 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 212 selfloop transitions, 62 changer transitions 0/280 dead transitions. [2024-06-14 14:04:51,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 280 transitions, 4034 flow [2024-06-14 14:04:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 14:04:51,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:04:51,288 INFO L175 Difference]: Start difference. First operand has 238 places, 250 transitions, 3223 flow. Second operand 8 states and 176 transitions. [2024-06-14 14:04:51,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 280 transitions, 4034 flow [2024-06-14 14:04:51,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 280 transitions, 3931 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 14:04:51,794 INFO L231 Difference]: Finished difference. Result has 239 places, 253 transitions, 3327 flow [2024-06-14 14:04:51,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3327, PETRI_PLACES=239, PETRI_TRANSITIONS=253} [2024-06-14 14:04:51,795 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-14 14:04:51,795 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 253 transitions, 3327 flow [2024-06-14 14:04:51,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:51,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:51,795 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, 1] [2024-06-14 14:04:51,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 14:04:51,796 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:51,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:51,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1286033452, now seen corresponding path program 8 times [2024-06-14 14:04:51,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:51,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917985637] [2024-06-14 14:04:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:51,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:52,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:52,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917985637] [2024-06-14 14:04:52,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917985637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:52,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:52,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:52,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031998214] [2024-06-14 14:04:52,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:52,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:52,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:52,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:52,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:52,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:52,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 253 transitions, 3327 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:52,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:52,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:52,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:52,683 INFO L124 PetriNetUnfolderBase]: 1839/3102 cut-off events. [2024-06-14 14:04:52,684 INFO L125 PetriNetUnfolderBase]: For 133115/133115 co-relation queries the response was YES. [2024-06-14 14:04:52,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20975 conditions, 3102 events. 1839/3102 cut-off events. For 133115/133115 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18727 event pairs, 382 based on Foata normal form. 6/3105 useless extension candidates. Maximal degree in co-relation 20864. Up to 1944 conditions per place. [2024-06-14 14:04:52,717 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 192 selfloop transitions, 99 changer transitions 0/297 dead transitions. [2024-06-14 14:04:52,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 297 transitions, 4228 flow [2024-06-14 14:04:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:04:52,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:04:52,719 INFO L175 Difference]: Start difference. First operand has 239 places, 253 transitions, 3327 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:04:52,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 297 transitions, 4228 flow [2024-06-14 14:04:53,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 297 transitions, 4126 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:53,131 INFO L231 Difference]: Finished difference. Result has 244 places, 255 transitions, 3471 flow [2024-06-14 14:04:53,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3471, PETRI_PLACES=244, PETRI_TRANSITIONS=255} [2024-06-14 14:04:53,131 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-14 14:04:53,132 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 255 transitions, 3471 flow [2024-06-14 14:04:53,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:53,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:53,132 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, 1] [2024-06-14 14:04:53,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 14:04:53,132 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:53,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:53,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1353004214, now seen corresponding path program 9 times [2024-06-14 14:04:53,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:53,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959321782] [2024-06-14 14:04:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:53,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:53,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959321782] [2024-06-14 14:04:53,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959321782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:53,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:53,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:53,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505729326] [2024-06-14 14:04:53,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:53,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:53,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:53,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:53,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:53,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 255 transitions, 3471 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:53,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:53,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:53,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:53,952 INFO L124 PetriNetUnfolderBase]: 1938/3257 cut-off events. [2024-06-14 14:04:53,953 INFO L125 PetriNetUnfolderBase]: For 158715/158715 co-relation queries the response was YES. [2024-06-14 14:04:53,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22991 conditions, 3257 events. 1938/3257 cut-off events. For 158715/158715 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19806 event pairs, 461 based on Foata normal form. 6/3260 useless extension candidates. Maximal degree in co-relation 22879. Up to 2639 conditions per place. [2024-06-14 14:04:53,993 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 209 selfloop transitions, 83 changer transitions 0/298 dead transitions. [2024-06-14 14:04:53,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 298 transitions, 4503 flow [2024-06-14 14:04:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-14 14:04:53,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:04:53,994 INFO L175 Difference]: Start difference. First operand has 244 places, 255 transitions, 3471 flow. Second operand 11 states and 240 transitions. [2024-06-14 14:04:53,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 298 transitions, 4503 flow [2024-06-14 14:04:54,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 298 transitions, 4381 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:54,658 INFO L231 Difference]: Finished difference. Result has 250 places, 258 transitions, 3588 flow [2024-06-14 14:04:54,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3353, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3588, PETRI_PLACES=250, PETRI_TRANSITIONS=258} [2024-06-14 14:04:54,659 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-14 14:04:54,659 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 258 transitions, 3588 flow [2024-06-14 14:04:54,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:54,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:54,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:54,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 14:04:54,660 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:54,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash -772852168, now seen corresponding path program 10 times [2024-06-14 14:04:54,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:54,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253733956] [2024-06-14 14:04:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:54,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:54,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:54,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253733956] [2024-06-14 14:04:54,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253733956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:54,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:54,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:54,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768222236] [2024-06-14 14:04:54,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:54,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:54,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:54,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:54,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 258 transitions, 3588 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:54,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:54,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:54,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:55,440 INFO L124 PetriNetUnfolderBase]: 1966/3303 cut-off events. [2024-06-14 14:04:55,440 INFO L125 PetriNetUnfolderBase]: For 167070/167070 co-relation queries the response was YES. [2024-06-14 14:04:55,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23517 conditions, 3303 events. 1966/3303 cut-off events. For 167070/167070 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20121 event pairs, 488 based on Foata normal form. 8/3308 useless extension candidates. Maximal degree in co-relation 23402. Up to 2794 conditions per place. [2024-06-14 14:04:55,474 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 212 selfloop transitions, 79 changer transitions 0/297 dead transitions. [2024-06-14 14:04:55,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 297 transitions, 4467 flow [2024-06-14 14:04:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:04:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:04:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-14 14:04:55,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 14:04:55,476 INFO L175 Difference]: Start difference. First operand has 250 places, 258 transitions, 3588 flow. Second operand 12 states and 252 transitions. [2024-06-14 14:04:55,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 297 transitions, 4467 flow [2024-06-14 14:04:56,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 297 transitions, 4356 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:56,161 INFO L231 Difference]: Finished difference. Result has 256 places, 259 transitions, 3661 flow [2024-06-14 14:04:56,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3661, PETRI_PLACES=256, PETRI_TRANSITIONS=259} [2024-06-14 14:04:56,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-14 14:04:56,162 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 259 transitions, 3661 flow [2024-06-14 14:04:56,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:56,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:56,163 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, 1] [2024-06-14 14:04:56,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 14:04:56,163 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:56,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash 632867402, now seen corresponding path program 11 times [2024-06-14 14:04:56,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:56,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832792272] [2024-06-14 14:04:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:56,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:56,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:56,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832792272] [2024-06-14 14:04:56,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832792272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:56,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:56,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:56,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664811939] [2024-06-14 14:04:56,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:56,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:56,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:56,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:56,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:56,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:56,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 259 transitions, 3661 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:56,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:56,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:56,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:57,003 INFO L124 PetriNetUnfolderBase]: 1948/3277 cut-off events. [2024-06-14 14:04:57,003 INFO L125 PetriNetUnfolderBase]: For 157283/157283 co-relation queries the response was YES. [2024-06-14 14:04:57,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23016 conditions, 3277 events. 1948/3277 cut-off events. For 157283/157283 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19990 event pairs, 496 based on Foata normal form. 8/3282 useless extension candidates. Maximal degree in co-relation 22899. Up to 2898 conditions per place. [2024-06-14 14:04:57,036 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 210 selfloop transitions, 76 changer transitions 0/292 dead transitions. [2024-06-14 14:04:57,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 292 transitions, 4348 flow [2024-06-14 14:04:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:04:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:04:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-14 14:04:57,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-14 14:04:57,038 INFO L175 Difference]: Start difference. First operand has 256 places, 259 transitions, 3661 flow. Second operand 12 states and 248 transitions. [2024-06-14 14:04:57,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 292 transitions, 4348 flow [2024-06-14 14:04:57,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 292 transitions, 4170 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-14 14:04:57,704 INFO L231 Difference]: Finished difference. Result has 258 places, 259 transitions, 3640 flow [2024-06-14 14:04:57,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3483, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3640, PETRI_PLACES=258, PETRI_TRANSITIONS=259} [2024-06-14 14:04:57,705 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-14 14:04:57,705 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 259 transitions, 3640 flow [2024-06-14 14:04:57,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:57,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:57,706 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, 1] [2024-06-14 14:04:57,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 14:04:57,706 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:57,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:57,706 INFO L85 PathProgramCache]: Analyzing trace with hash 497996942, now seen corresponding path program 12 times [2024-06-14 14:04:57,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:57,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515222493] [2024-06-14 14:04:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:57,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:57,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:57,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515222493] [2024-06-14 14:04:57,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515222493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:57,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:57,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:57,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791205853] [2024-06-14 14:04:57,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:57,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:57,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:57,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:57,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:58,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:58,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 259 transitions, 3640 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:58,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:58,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:58,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:58,539 INFO L124 PetriNetUnfolderBase]: 1935/3258 cut-off events. [2024-06-14 14:04:58,540 INFO L125 PetriNetUnfolderBase]: For 146741/146747 co-relation queries the response was YES. [2024-06-14 14:04:58,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22477 conditions, 3258 events. 1935/3258 cut-off events. For 146741/146747 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 19906 event pairs, 468 based on Foata normal form. 10/3263 useless extension candidates. Maximal degree in co-relation 22359. Up to 2862 conditions per place. [2024-06-14 14:04:58,574 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 230 selfloop transitions, 41 changer transitions 0/277 dead transitions. [2024-06-14 14:04:58,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 277 transitions, 4238 flow [2024-06-14 14:04:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 14:04:58,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 14:04:58,576 INFO L175 Difference]: Start difference. First operand has 258 places, 259 transitions, 3640 flow. Second operand 7 states and 152 transitions. [2024-06-14 14:04:58,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 277 transitions, 4238 flow [2024-06-14 14:04:59,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 277 transitions, 4072 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 14:04:59,308 INFO L231 Difference]: Finished difference. Result has 254 places, 259 transitions, 3564 flow [2024-06-14 14:04:59,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3564, PETRI_PLACES=254, PETRI_TRANSITIONS=259} [2024-06-14 14:04:59,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-14 14:04:59,308 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 259 transitions, 3564 flow [2024-06-14 14:04:59,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:59,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:59,309 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, 1] [2024-06-14 14:04:59,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 14:04:59,309 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:59,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:59,309 INFO L85 PathProgramCache]: Analyzing trace with hash -572903916, now seen corresponding path program 13 times [2024-06-14 14:04:59,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:59,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869441277] [2024-06-14 14:04:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:59,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:59,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:59,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869441277] [2024-06-14 14:04:59,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869441277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:59,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:59,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:59,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200866101] [2024-06-14 14:04:59,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:59,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:59,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:59,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:59,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:04:59,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 259 transitions, 3564 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:59,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:59,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:04:59,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:00,088 INFO L124 PetriNetUnfolderBase]: 1917/3231 cut-off events. [2024-06-14 14:05:00,089 INFO L125 PetriNetUnfolderBase]: For 138742/138745 co-relation queries the response was YES. [2024-06-14 14:05:00,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21788 conditions, 3231 events. 1917/3231 cut-off events. For 138742/138745 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 19734 event pairs, 498 based on Foata normal form. 8/3232 useless extension candidates. Maximal degree in co-relation 21669. Up to 2807 conditions per place. [2024-06-14 14:05:00,122 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 229 selfloop transitions, 41 changer transitions 0/276 dead transitions. [2024-06-14 14:05:00,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 276 transitions, 4176 flow [2024-06-14 14:05:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 14:05:00,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-14 14:05:00,125 INFO L175 Difference]: Start difference. First operand has 254 places, 259 transitions, 3564 flow. Second operand 6 states and 137 transitions. [2024-06-14 14:05:00,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 276 transitions, 4176 flow [2024-06-14 14:05:00,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 276 transitions, 4088 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:00,803 INFO L231 Difference]: Finished difference. Result has 253 places, 259 transitions, 3569 flow [2024-06-14 14:05:00,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3476, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3569, PETRI_PLACES=253, PETRI_TRANSITIONS=259} [2024-06-14 14:05:00,804 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-14 14:05:00,804 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 259 transitions, 3569 flow [2024-06-14 14:05:00,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:00,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:00,805 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, 1] [2024-06-14 14:05:00,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 14:05:00,805 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:00,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:00,805 INFO L85 PathProgramCache]: Analyzing trace with hash 396754284, now seen corresponding path program 14 times [2024-06-14 14:05:00,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:00,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251919484] [2024-06-14 14:05:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:00,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:01,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:01,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251919484] [2024-06-14 14:05:01,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251919484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:01,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:01,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:01,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444386710] [2024-06-14 14:05:01,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:01,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:01,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:01,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:01,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:01,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:01,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 259 transitions, 3569 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:01,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:01,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:01,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:01,695 INFO L124 PetriNetUnfolderBase]: 1904/3212 cut-off events. [2024-06-14 14:05:01,696 INFO L125 PetriNetUnfolderBase]: For 123492/123495 co-relation queries the response was YES. [2024-06-14 14:05:01,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21333 conditions, 3212 events. 1904/3212 cut-off events. For 123492/123495 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 19695 event pairs, 364 based on Foata normal form. 6/3211 useless extension candidates. Maximal degree in co-relation 21214. Up to 2552 conditions per place. [2024-06-14 14:05:01,732 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 224 selfloop transitions, 56 changer transitions 0/286 dead transitions. [2024-06-14 14:05:01,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 286 transitions, 4266 flow [2024-06-14 14:05:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 14:05:01,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-14 14:05:01,733 INFO L175 Difference]: Start difference. First operand has 253 places, 259 transitions, 3569 flow. Second operand 7 states and 163 transitions. [2024-06-14 14:05:01,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 286 transitions, 4266 flow [2024-06-14 14:05:02,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 286 transitions, 4169 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:02,237 INFO L231 Difference]: Finished difference. Result has 256 places, 260 transitions, 3634 flow [2024-06-14 14:05:02,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3634, PETRI_PLACES=256, PETRI_TRANSITIONS=260} [2024-06-14 14:05:02,238 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-14 14:05:02,238 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 260 transitions, 3634 flow [2024-06-14 14:05:02,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:02,238 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, 1] [2024-06-14 14:05:02,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 14:05:02,239 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:02,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:02,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1731346060, now seen corresponding path program 15 times [2024-06-14 14:05:02,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:02,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523690612] [2024-06-14 14:05:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:02,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:02,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:02,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523690612] [2024-06-14 14:05:02,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523690612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:02,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:02,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:02,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651990284] [2024-06-14 14:05:02,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:02,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:02,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:02,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:02,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 260 transitions, 3634 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:02,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:02,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:03,094 INFO L124 PetriNetUnfolderBase]: 1891/3193 cut-off events. [2024-06-14 14:05:03,095 INFO L125 PetriNetUnfolderBase]: For 115530/115533 co-relation queries the response was YES. [2024-06-14 14:05:03,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21038 conditions, 3193 events. 1891/3193 cut-off events. For 115530/115533 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 19541 event pairs, 365 based on Foata normal form. 6/3192 useless extension candidates. Maximal degree in co-relation 20918. Up to 2655 conditions per place. [2024-06-14 14:05:03,135 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 236 selfloop transitions, 46 changer transitions 0/288 dead transitions. [2024-06-14 14:05:03,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 288 transitions, 4316 flow [2024-06-14 14:05:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 14:05:03,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-14 14:05:03,136 INFO L175 Difference]: Start difference. First operand has 256 places, 260 transitions, 3634 flow. Second operand 7 states and 163 transitions. [2024-06-14 14:05:03,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 288 transitions, 4316 flow [2024-06-14 14:05:03,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 288 transitions, 4177 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:03,602 INFO L231 Difference]: Finished difference. Result has 257 places, 260 transitions, 3591 flow [2024-06-14 14:05:03,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3495, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3591, PETRI_PLACES=257, PETRI_TRANSITIONS=260} [2024-06-14 14:05:03,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-14 14:05:03,603 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 260 transitions, 3591 flow [2024-06-14 14:05:03,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:03,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:03,604 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, 1] [2024-06-14 14:05:03,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 14:05:03,604 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:03,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1426778198, now seen corresponding path program 16 times [2024-06-14 14:05:03,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:03,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757874660] [2024-06-14 14:05:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:03,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:03,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:03,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757874660] [2024-06-14 14:05:03,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757874660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:03,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:03,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:03,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926850940] [2024-06-14 14:05:03,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:03,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:03,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:03,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:03,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:03,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:03,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 260 transitions, 3591 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:03,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:03,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:03,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:04,429 INFO L124 PetriNetUnfolderBase]: 1995/3366 cut-off events. [2024-06-14 14:05:04,430 INFO L125 PetriNetUnfolderBase]: For 170237/170237 co-relation queries the response was YES. [2024-06-14 14:05:04,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21756 conditions, 3366 events. 1995/3366 cut-off events. For 170237/170237 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 20794 event pairs, 506 based on Foata normal form. 34/3397 useless extension candidates. Maximal degree in co-relation 21637. Up to 2841 conditions per place. [2024-06-14 14:05:04,464 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 217 selfloop transitions, 64 changer transitions 6/293 dead transitions. [2024-06-14 14:05:04,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 293 transitions, 4318 flow [2024-06-14 14:05:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:05:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:05:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-14 14:05:04,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2024-06-14 14:05:04,466 INFO L175 Difference]: Start difference. First operand has 257 places, 260 transitions, 3591 flow. Second operand 12 states and 247 transitions. [2024-06-14 14:05:04,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 293 transitions, 4318 flow [2024-06-14 14:05:05,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 293 transitions, 4129 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:05,035 INFO L231 Difference]: Finished difference. Result has 260 places, 257 transitions, 3528 flow [2024-06-14 14:05:05,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3528, PETRI_PLACES=260, PETRI_TRANSITIONS=257} [2024-06-14 14:05:05,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-14 14:05:05,036 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 257 transitions, 3528 flow [2024-06-14 14:05:05,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:05,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:05,036 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, 1] [2024-06-14 14:05:05,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 14:05:05,036 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:05,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:05,037 INFO L85 PathProgramCache]: Analyzing trace with hash -976708026, now seen corresponding path program 17 times [2024-06-14 14:05:05,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:05,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831130889] [2024-06-14 14:05:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:05,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:05,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:05,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831130889] [2024-06-14 14:05:05,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831130889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:05,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:05,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:05,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714169622] [2024-06-14 14:05:05,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:05,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:05,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:05,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 257 transitions, 3528 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:05,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:05,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:05,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:05,847 INFO L124 PetriNetUnfolderBase]: 1940/3271 cut-off events. [2024-06-14 14:05:05,847 INFO L125 PetriNetUnfolderBase]: For 117037/117037 co-relation queries the response was YES. [2024-06-14 14:05:05,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21043 conditions, 3271 events. 1940/3271 cut-off events. For 117037/117037 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 20118 event pairs, 474 based on Foata normal form. 8/3276 useless extension candidates. Maximal degree in co-relation 20926. Up to 2885 conditions per place. [2024-06-14 14:05:05,881 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 218 selfloop transitions, 63 changer transitions 0/287 dead transitions. [2024-06-14 14:05:05,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 287 transitions, 4219 flow [2024-06-14 14:05:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-14 14:05:05,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204545454545455 [2024-06-14 14:05:05,882 INFO L175 Difference]: Start difference. First operand has 260 places, 257 transitions, 3528 flow. Second operand 11 states and 229 transitions. [2024-06-14 14:05:05,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 287 transitions, 4219 flow [2024-06-14 14:05:06,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 287 transitions, 4067 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-14 14:05:06,425 INFO L231 Difference]: Finished difference. Result has 259 places, 258 transitions, 3533 flow [2024-06-14 14:05:06,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3533, PETRI_PLACES=259, PETRI_TRANSITIONS=258} [2024-06-14 14:05:06,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-14 14:05:06,426 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 258 transitions, 3533 flow [2024-06-14 14:05:06,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:06,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:06,427 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, 1] [2024-06-14 14:05:06,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 14:05:06,427 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:06,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:06,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1596475600, now seen corresponding path program 18 times [2024-06-14 14:05:06,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:06,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777773448] [2024-06-14 14:05:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:06,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:06,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:06,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777773448] [2024-06-14 14:05:06,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777773448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:06,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:06,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:06,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252471983] [2024-06-14 14:05:06,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:06,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:06,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:06,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:06,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:06,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:06,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 258 transitions, 3533 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:06,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:06,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:06,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:07,252 INFO L124 PetriNetUnfolderBase]: 1968/3315 cut-off events. [2024-06-14 14:05:07,252 INFO L125 PetriNetUnfolderBase]: For 117125/117125 co-relation queries the response was YES. [2024-06-14 14:05:07,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21252 conditions, 3315 events. 1968/3315 cut-off events. For 117125/117125 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 20431 event pairs, 491 based on Foata normal form. 8/3320 useless extension candidates. Maximal degree in co-relation 21136. Up to 2929 conditions per place. [2024-06-14 14:05:07,289 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 218 selfloop transitions, 61 changer transitions 0/285 dead transitions. [2024-06-14 14:05:07,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 285 transitions, 4216 flow [2024-06-14 14:05:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 14:05:07,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-14 14:05:07,290 INFO L175 Difference]: Start difference. First operand has 259 places, 258 transitions, 3533 flow. Second operand 8 states and 179 transitions. [2024-06-14 14:05:07,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 285 transitions, 4216 flow [2024-06-14 14:05:07,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 285 transitions, 4077 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:07,841 INFO L231 Difference]: Finished difference. Result has 258 places, 259 transitions, 3549 flow [2024-06-14 14:05:07,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3394, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3549, PETRI_PLACES=258, PETRI_TRANSITIONS=259} [2024-06-14 14:05:07,842 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-14 14:05:07,842 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 259 transitions, 3549 flow [2024-06-14 14:05:07,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:07,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:07,842 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, 1] [2024-06-14 14:05:07,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 14:05:07,842 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:07,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:07,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1588857040, now seen corresponding path program 19 times [2024-06-14 14:05:07,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:07,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727285785] [2024-06-14 14:05:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:07,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:08,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:08,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727285785] [2024-06-14 14:05:08,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727285785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:08,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:08,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:08,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188004571] [2024-06-14 14:05:08,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:08,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:08,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 259 transitions, 3549 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:08,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:08,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:08,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:08,666 INFO L124 PetriNetUnfolderBase]: 1996/3359 cut-off events. [2024-06-14 14:05:08,666 INFO L125 PetriNetUnfolderBase]: For 120821/120821 co-relation queries the response was YES. [2024-06-14 14:05:08,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21565 conditions, 3359 events. 1996/3359 cut-off events. For 120821/120821 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 20679 event pairs, 491 based on Foata normal form. 8/3364 useless extension candidates. Maximal degree in co-relation 21448. Up to 2833 conditions per place. [2024-06-14 14:05:08,698 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 220 selfloop transitions, 64 changer transitions 0/290 dead transitions. [2024-06-14 14:05:08,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 290 transitions, 4284 flow [2024-06-14 14:05:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 14:05:08,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-14 14:05:08,699 INFO L175 Difference]: Start difference. First operand has 258 places, 259 transitions, 3549 flow. Second operand 8 states and 182 transitions. [2024-06-14 14:05:08,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 290 transitions, 4284 flow [2024-06-14 14:05:09,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 290 transitions, 4147 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:09,262 INFO L231 Difference]: Finished difference. Result has 260 places, 260 transitions, 3574 flow [2024-06-14 14:05:09,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3574, PETRI_PLACES=260, PETRI_TRANSITIONS=260} [2024-06-14 14:05:09,263 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-14 14:05:09,263 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 260 transitions, 3574 flow [2024-06-14 14:05:09,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:09,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:09,263 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, 1] [2024-06-14 14:05:09,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 14:05:09,264 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:09,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:09,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1633698548, now seen corresponding path program 20 times [2024-06-14 14:05:09,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:09,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552460834] [2024-06-14 14:05:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:09,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552460834] [2024-06-14 14:05:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552460834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:09,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:09,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:09,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520959586] [2024-06-14 14:05:09,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:09,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:09,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:09,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:09,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 260 transitions, 3574 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:09,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:09,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:09,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:10,070 INFO L124 PetriNetUnfolderBase]: 2011/3384 cut-off events. [2024-06-14 14:05:10,070 INFO L125 PetriNetUnfolderBase]: For 120060/120060 co-relation queries the response was YES. [2024-06-14 14:05:10,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21640 conditions, 3384 events. 2011/3384 cut-off events. For 120060/120060 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 20917 event pairs, 503 based on Foata normal form. 8/3389 useless extension candidates. Maximal degree in co-relation 21522. Up to 2858 conditions per place. [2024-06-14 14:05:10,106 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 222 selfloop transitions, 66 changer transitions 0/294 dead transitions. [2024-06-14 14:05:10,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 294 transitions, 4325 flow [2024-06-14 14:05:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-14 14:05:10,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-14 14:05:10,108 INFO L175 Difference]: Start difference. First operand has 260 places, 260 transitions, 3574 flow. Second operand 11 states and 232 transitions. [2024-06-14 14:05:10,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 294 transitions, 4325 flow [2024-06-14 14:05:10,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 294 transitions, 4179 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:10,639 INFO L231 Difference]: Finished difference. Result has 265 places, 261 transitions, 3596 flow [2024-06-14 14:05:10,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3596, PETRI_PLACES=265, PETRI_TRANSITIONS=261} [2024-06-14 14:05:10,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-14 14:05:10,640 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 261 transitions, 3596 flow [2024-06-14 14:05:10,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:10,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:10,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:10,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 14:05:10,641 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:10,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:10,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1730960110, now seen corresponding path program 21 times [2024-06-14 14:05:10,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:10,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810048552] [2024-06-14 14:05:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:10,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:10,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:10,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810048552] [2024-06-14 14:05:10,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810048552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:10,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:10,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:10,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968806808] [2024-06-14 14:05:10,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:10,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:10,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:10,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:10,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:10,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:10,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 261 transitions, 3596 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:10,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:10,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:10,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:11,474 INFO L124 PetriNetUnfolderBase]: 1998/3365 cut-off events. [2024-06-14 14:05:11,474 INFO L125 PetriNetUnfolderBase]: For 106022/106022 co-relation queries the response was YES. [2024-06-14 14:05:11,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21041 conditions, 3365 events. 1998/3365 cut-off events. For 106022/106022 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 20853 event pairs, 387 based on Foata normal form. 6/3368 useless extension candidates. Maximal degree in co-relation 20922. Up to 2344 conditions per place. [2024-06-14 14:05:11,509 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 208 selfloop transitions, 84 changer transitions 0/298 dead transitions. [2024-06-14 14:05:11,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 298 transitions, 4351 flow [2024-06-14 14:05:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:05:11,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-14 14:05:11,511 INFO L175 Difference]: Start difference. First operand has 265 places, 261 transitions, 3596 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:05:11,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 298 transitions, 4351 flow [2024-06-14 14:05:11,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 298 transitions, 4199 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:11,962 INFO L231 Difference]: Finished difference. Result has 264 places, 261 transitions, 3616 flow [2024-06-14 14:05:11,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3616, PETRI_PLACES=264, PETRI_TRANSITIONS=261} [2024-06-14 14:05:11,963 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-14 14:05:11,963 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 261 transitions, 3616 flow [2024-06-14 14:05:11,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:11,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:11,963 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, 1] [2024-06-14 14:05:11,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 14:05:11,964 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:11,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2129773958, now seen corresponding path program 2 times [2024-06-14 14:05:11,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:11,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621129488] [2024-06-14 14:05:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:11,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621129488] [2024-06-14 14:05:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621129488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:12,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:12,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:12,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577185181] [2024-06-14 14:05:12,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:12,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:12,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:12,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:12,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:12,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:12,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 261 transitions, 3616 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:12,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:12,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:12,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:12,859 INFO L124 PetriNetUnfolderBase]: 2106/3563 cut-off events. [2024-06-14 14:05:12,859 INFO L125 PetriNetUnfolderBase]: For 158292/158292 co-relation queries the response was YES. [2024-06-14 14:05:12,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22072 conditions, 3563 events. 2106/3563 cut-off events. For 158292/158292 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 22331 event pairs, 524 based on Foata normal form. 30/3590 useless extension candidates. Maximal degree in co-relation 21952. Up to 2901 conditions per place. [2024-06-14 14:05:12,898 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 221 selfloop transitions, 67 changer transitions 8/302 dead transitions. [2024-06-14 14:05:12,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 302 transitions, 4453 flow [2024-06-14 14:05:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:05:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:05:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-14 14:05:12,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-06-14 14:05:12,900 INFO L175 Difference]: Start difference. First operand has 264 places, 261 transitions, 3616 flow. Second operand 12 states and 251 transitions. [2024-06-14 14:05:12,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 302 transitions, 4453 flow [2024-06-14 14:05:13,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 302 transitions, 4109 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:13,402 INFO L231 Difference]: Finished difference. Result has 268 places, 261 transitions, 3448 flow [2024-06-14 14:05:13,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3272, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3448, PETRI_PLACES=268, PETRI_TRANSITIONS=261} [2024-06-14 14:05:13,402 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-14 14:05:13,402 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 261 transitions, 3448 flow [2024-06-14 14:05:13,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:13,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:13,403 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, 1] [2024-06-14 14:05:13,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 14:05:13,403 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:13,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:13,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2063099270, now seen corresponding path program 3 times [2024-06-14 14:05:13,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:13,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493533956] [2024-06-14 14:05:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:13,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:13,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:13,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493533956] [2024-06-14 14:05:13,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493533956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:13,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:13,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:13,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641604464] [2024-06-14 14:05:13,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:13,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:13,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:13,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:13,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:13,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:13,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 261 transitions, 3448 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:13,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:13,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:13,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:14,239 INFO L124 PetriNetUnfolderBase]: 2025/3416 cut-off events. [2024-06-14 14:05:14,239 INFO L125 PetriNetUnfolderBase]: For 108752/108752 co-relation queries the response was YES. [2024-06-14 14:05:14,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20734 conditions, 3416 events. 2025/3416 cut-off events. For 108752/108752 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 21247 event pairs, 475 based on Foata normal form. 6/3419 useless extension candidates. Maximal degree in co-relation 20614. Up to 2548 conditions per place. [2024-06-14 14:05:14,274 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 79 changer transitions 0/300 dead transitions. [2024-06-14 14:05:14,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 300 transitions, 4379 flow [2024-06-14 14:05:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-14 14:05:14,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-14 14:05:14,275 INFO L175 Difference]: Start difference. First operand has 268 places, 261 transitions, 3448 flow. Second operand 11 states and 232 transitions. [2024-06-14 14:05:14,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 300 transitions, 4379 flow [2024-06-14 14:05:14,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 300 transitions, 4212 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-14 14:05:14,784 INFO L231 Difference]: Finished difference. Result has 270 places, 264 transitions, 3533 flow [2024-06-14 14:05:14,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3285, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3533, PETRI_PLACES=270, PETRI_TRANSITIONS=264} [2024-06-14 14:05:14,784 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-14 14:05:14,784 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 264 transitions, 3533 flow [2024-06-14 14:05:14,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:14,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:14,785 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, 1] [2024-06-14 14:05:14,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 14:05:14,785 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:14,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:14,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2062891880, now seen corresponding path program 4 times [2024-06-14 14:05:14,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:14,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307629393] [2024-06-14 14:05:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:14,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:15,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:15,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307629393] [2024-06-14 14:05:15,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307629393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:15,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:15,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:15,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270175016] [2024-06-14 14:05:15,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:15,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:15,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:15,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:15,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:15,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:15,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 264 transitions, 3533 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:15,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:15,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:15,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:15,638 INFO L124 PetriNetUnfolderBase]: 2012/3397 cut-off events. [2024-06-14 14:05:15,639 INFO L125 PetriNetUnfolderBase]: For 97419/97419 co-relation queries the response was YES. [2024-06-14 14:05:15,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20474 conditions, 3397 events. 2012/3397 cut-off events. For 97419/97419 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 21081 event pairs, 455 based on Foata normal form. 6/3400 useless extension candidates. Maximal degree in co-relation 20353. Up to 2542 conditions per place. [2024-06-14 14:05:15,673 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 79 changer transitions 0/300 dead transitions. [2024-06-14 14:05:15,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 300 transitions, 4290 flow [2024-06-14 14:05:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-14 14:05:15,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-14 14:05:15,674 INFO L175 Difference]: Start difference. First operand has 270 places, 264 transitions, 3533 flow. Second operand 11 states and 232 transitions. [2024-06-14 14:05:15,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 300 transitions, 4290 flow [2024-06-14 14:05:16,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 300 transitions, 4116 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:16,066 INFO L231 Difference]: Finished difference. Result has 273 places, 264 transitions, 3521 flow [2024-06-14 14:05:16,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3359, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3521, PETRI_PLACES=273, PETRI_TRANSITIONS=264} [2024-06-14 14:05:16,066 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-14 14:05:16,066 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 264 transitions, 3521 flow [2024-06-14 14:05:16,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:16,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:16,067 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, 1, 1] [2024-06-14 14:05:16,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 14:05:16,067 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:16,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:16,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1137350, now seen corresponding path program 1 times [2024-06-14 14:05:16,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:16,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800740864] [2024-06-14 14:05:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:16,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:16,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:16,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800740864] [2024-06-14 14:05:16,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800740864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:16,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:16,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:05:16,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569342884] [2024-06-14 14:05:16,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:16,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:05:16,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:05:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:05:16,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:16,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 264 transitions, 3521 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:16,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:16,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:16,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:16,981 INFO L124 PetriNetUnfolderBase]: 2352/4000 cut-off events. [2024-06-14 14:05:16,981 INFO L125 PetriNetUnfolderBase]: For 229213/229216 co-relation queries the response was YES. [2024-06-14 14:05:17,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26069 conditions, 4000 events. 2352/4000 cut-off events. For 229213/229216 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 25782 event pairs, 419 based on Foata normal form. 18/4011 useless extension candidates. Maximal degree in co-relation 25948. Up to 2202 conditions per place. [2024-06-14 14:05:17,023 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 213 selfloop transitions, 80 changer transitions 15/314 dead transitions. [2024-06-14 14:05:17,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 314 transitions, 4731 flow [2024-06-14 14:05:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 14:05:17,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-14 14:05:17,025 INFO L175 Difference]: Start difference. First operand has 273 places, 264 transitions, 3521 flow. Second operand 9 states and 209 transitions. [2024-06-14 14:05:17,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 314 transitions, 4731 flow [2024-06-14 14:05:17,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 314 transitions, 4490 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-14 14:05:17,831 INFO L231 Difference]: Finished difference. Result has 272 places, 267 transitions, 3555 flow [2024-06-14 14:05:17,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3284, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3555, PETRI_PLACES=272, PETRI_TRANSITIONS=267} [2024-06-14 14:05:17,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-14 14:05:17,832 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 267 transitions, 3555 flow [2024-06-14 14:05:17,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:17,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:17,833 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, 1, 1] [2024-06-14 14:05:17,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 14:05:17,833 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:17,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:17,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1903797592, now seen corresponding path program 2 times [2024-06-14 14:05:17,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:17,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812354887] [2024-06-14 14:05:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:17,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:18,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:18,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812354887] [2024-06-14 14:05:18,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812354887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:18,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:18,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:18,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188437871] [2024-06-14 14:05:18,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:18,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:18,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:18,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:18,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 267 transitions, 3555 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:18,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:18,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:18,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:18,724 INFO L124 PetriNetUnfolderBase]: 2401/4107 cut-off events. [2024-06-14 14:05:18,725 INFO L125 PetriNetUnfolderBase]: For 271373/271376 co-relation queries the response was YES. [2024-06-14 14:05:18,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27701 conditions, 4107 events. 2401/4107 cut-off events. For 271373/271376 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26766 event pairs, 605 based on Foata normal form. 18/4118 useless extension candidates. Maximal degree in co-relation 27580. Up to 3364 conditions per place. [2024-06-14 14:05:18,768 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 264 selfloop transitions, 24 changer transitions 12/306 dead transitions. [2024-06-14 14:05:18,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 306 transitions, 4507 flow [2024-06-14 14:05:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 14:05:18,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-06-14 14:05:18,770 INFO L175 Difference]: Start difference. First operand has 272 places, 267 transitions, 3555 flow. Second operand 10 states and 211 transitions. [2024-06-14 14:05:18,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 306 transitions, 4507 flow [2024-06-14 14:05:19,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 306 transitions, 4395 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:19,700 INFO L231 Difference]: Finished difference. Result has 272 places, 265 transitions, 3479 flow [2024-06-14 14:05:19,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3479, PETRI_PLACES=272, PETRI_TRANSITIONS=265} [2024-06-14 14:05:19,700 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-14 14:05:19,700 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 265 transitions, 3479 flow [2024-06-14 14:05:19,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:19,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:19,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:19,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 14:05:19,701 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:19,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:19,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1748401398, now seen corresponding path program 3 times [2024-06-14 14:05:19,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:19,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079789652] [2024-06-14 14:05:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:19,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:19,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:19,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079789652] [2024-06-14 14:05:19,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079789652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:19,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:19,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:19,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706915298] [2024-06-14 14:05:19,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:19,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:19,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:19,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:19,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:20,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:20,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 265 transitions, 3479 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:20,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:20,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:20,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:20,536 INFO L124 PetriNetUnfolderBase]: 2215/3769 cut-off events. [2024-06-14 14:05:20,536 INFO L125 PetriNetUnfolderBase]: For 184412/184415 co-relation queries the response was YES. [2024-06-14 14:05:20,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23616 conditions, 3769 events. 2215/3769 cut-off events. For 184412/184415 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 24010 event pairs, 544 based on Foata normal form. 18/3780 useless extension candidates. Maximal degree in co-relation 23496. Up to 3229 conditions per place. [2024-06-14 14:05:20,576 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 245 selfloop transitions, 20 changer transitions 22/293 dead transitions. [2024-06-14 14:05:20,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 293 transitions, 4199 flow [2024-06-14 14:05:20,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 14:05:20,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 14:05:20,577 INFO L175 Difference]: Start difference. First operand has 272 places, 265 transitions, 3479 flow. Second operand 8 states and 172 transitions. [2024-06-14 14:05:20,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 293 transitions, 4199 flow [2024-06-14 14:05:21,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 293 transitions, 4139 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:21,331 INFO L231 Difference]: Finished difference. Result has 269 places, 261 transitions, 3423 flow [2024-06-14 14:05:21,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3419, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3423, PETRI_PLACES=269, PETRI_TRANSITIONS=261} [2024-06-14 14:05:21,340 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-14 14:05:21,340 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 261 transitions, 3423 flow [2024-06-14 14:05:21,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:21,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:21,340 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, 1, 1] [2024-06-14 14:05:21,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 14:05:21,341 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:21,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:21,341 INFO L85 PathProgramCache]: Analyzing trace with hash 968330042, now seen corresponding path program 4 times [2024-06-14 14:05:21,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:21,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006107040] [2024-06-14 14:05:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:21,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:21,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:21,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006107040] [2024-06-14 14:05:21,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006107040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:21,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:21,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:21,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850750637] [2024-06-14 14:05:21,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:21,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:21,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:21,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:21,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:21,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:21,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 261 transitions, 3423 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:21,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:21,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:21,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:22,238 INFO L124 PetriNetUnfolderBase]: 2154/3648 cut-off events. [2024-06-14 14:05:22,242 INFO L125 PetriNetUnfolderBase]: For 196362/196365 co-relation queries the response was YES. [2024-06-14 14:05:22,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23168 conditions, 3648 events. 2154/3648 cut-off events. For 196362/196365 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23184 event pairs, 419 based on Foata normal form. 24/3666 useless extension candidates. Maximal degree in co-relation 23048. Up to 2340 conditions per place. [2024-06-14 14:05:22,281 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 208 selfloop transitions, 71 changer transitions 10/295 dead transitions. [2024-06-14 14:05:22,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 295 transitions, 4376 flow [2024-06-14 14:05:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 14:05:22,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-14 14:05:22,283 INFO L175 Difference]: Start difference. First operand has 269 places, 261 transitions, 3423 flow. Second operand 8 states and 185 transitions. [2024-06-14 14:05:22,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 295 transitions, 4376 flow [2024-06-14 14:05:23,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 295 transitions, 4328 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:23,133 INFO L231 Difference]: Finished difference. Result has 266 places, 258 transitions, 3478 flow [2024-06-14 14:05:23,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3379, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3478, PETRI_PLACES=266, PETRI_TRANSITIONS=258} [2024-06-14 14:05:23,133 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-14 14:05:23,133 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 258 transitions, 3478 flow [2024-06-14 14:05:23,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:23,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:23,134 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, 1, 1] [2024-06-14 14:05:23,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 14:05:23,134 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:23,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:23,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1204505402, now seen corresponding path program 5 times [2024-06-14 14:05:23,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:23,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155528306] [2024-06-14 14:05:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:23,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:23,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:23,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155528306] [2024-06-14 14:05:23,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155528306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:23,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:23,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:23,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463839523] [2024-06-14 14:05:23,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:23,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:23,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:23,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:23,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 258 transitions, 3478 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:23,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:23,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:23,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:24,058 INFO L124 PetriNetUnfolderBase]: 2058/3478 cut-off events. [2024-06-14 14:05:24,058 INFO L125 PetriNetUnfolderBase]: For 193239/193242 co-relation queries the response was YES. [2024-06-14 14:05:24,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22519 conditions, 3478 events. 2058/3478 cut-off events. For 193239/193242 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 21809 event pairs, 533 based on Foata normal form. 24/3496 useless extension candidates. Maximal degree in co-relation 22399. Up to 2628 conditions per place. [2024-06-14 14:05:24,097 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 57 changer transitions 6/284 dead transitions. [2024-06-14 14:05:24,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 284 transitions, 4340 flow [2024-06-14 14:05:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 14:05:24,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-14 14:05:24,101 INFO L175 Difference]: Start difference. First operand has 266 places, 258 transitions, 3478 flow. Second operand 8 states and 179 transitions. [2024-06-14 14:05:24,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 284 transitions, 4340 flow [2024-06-14 14:05:24,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 284 transitions, 4069 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-14 14:05:24,774 INFO L231 Difference]: Finished difference. Result has 264 places, 256 transitions, 3320 flow [2024-06-14 14:05:24,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3320, PETRI_PLACES=264, PETRI_TRANSITIONS=256} [2024-06-14 14:05:24,784 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-14 14:05:24,784 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 256 transitions, 3320 flow [2024-06-14 14:05:24,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:24,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:24,785 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, 1, 1] [2024-06-14 14:05:24,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 14:05:24,785 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:24,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:24,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1204802072, now seen corresponding path program 6 times [2024-06-14 14:05:24,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:24,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934774746] [2024-06-14 14:05:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:24,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:25,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:25,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934774746] [2024-06-14 14:05:25,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934774746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:25,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:25,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:25,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773442519] [2024-06-14 14:05:25,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:25,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:25,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:25,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:25,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:25,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:25,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 256 transitions, 3320 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:25,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:25,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:25,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:25,548 INFO L124 PetriNetUnfolderBase]: 1907/3223 cut-off events. [2024-06-14 14:05:25,548 INFO L125 PetriNetUnfolderBase]: For 138065/138068 co-relation queries the response was YES. [2024-06-14 14:05:25,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19257 conditions, 3223 events. 1907/3223 cut-off events. For 138065/138068 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 19910 event pairs, 514 based on Foata normal form. 26/3243 useless extension candidates. Maximal degree in co-relation 19137. Up to 2688 conditions per place. [2024-06-14 14:05:25,580 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 212 selfloop transitions, 48 changer transitions 8/274 dead transitions. [2024-06-14 14:05:25,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 274 transitions, 3948 flow [2024-06-14 14:05:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 14:05:25,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 14:05:25,582 INFO L175 Difference]: Start difference. First operand has 264 places, 256 transitions, 3320 flow. Second operand 8 states and 172 transitions. [2024-06-14 14:05:25,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 274 transitions, 3948 flow [2024-06-14 14:05:26,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 274 transitions, 3784 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:26,048 INFO L231 Difference]: Finished difference. Result has 263 places, 250 transitions, 3184 flow [2024-06-14 14:05:26,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3156, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3184, PETRI_PLACES=263, PETRI_TRANSITIONS=250} [2024-06-14 14:05:26,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-14 14:05:26,048 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 250 transitions, 3184 flow [2024-06-14 14:05:26,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:26,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:26,049 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, 1, 1] [2024-06-14 14:05:26,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 14:05:26,049 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:26,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:26,049 INFO L85 PathProgramCache]: Analyzing trace with hash -388720656, now seen corresponding path program 7 times [2024-06-14 14:05:26,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:26,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258654667] [2024-06-14 14:05:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:26,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:26,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:26,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258654667] [2024-06-14 14:05:26,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258654667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:26,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:26,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:26,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898847331] [2024-06-14 14:05:26,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:26,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:26,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:26,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:26,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 250 transitions, 3184 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:26,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:26,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:26,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:26,926 INFO L124 PetriNetUnfolderBase]: 1948/3310 cut-off events. [2024-06-14 14:05:26,926 INFO L125 PetriNetUnfolderBase]: For 156064/156065 co-relation queries the response was YES. [2024-06-14 14:05:26,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20503 conditions, 3310 events. 1948/3310 cut-off events. For 156064/156065 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 20488 event pairs, 328 based on Foata normal form. 18/3322 useless extension candidates. Maximal degree in co-relation 20384. Up to 2402 conditions per place. [2024-06-14 14:05:26,958 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 52 changer transitions 8/281 dead transitions. [2024-06-14 14:05:26,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 281 transitions, 4032 flow [2024-06-14 14:05:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 14:05:26,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-14 14:05:26,959 INFO L175 Difference]: Start difference. First operand has 263 places, 250 transitions, 3184 flow. Second operand 8 states and 182 transitions. [2024-06-14 14:05:26,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 281 transitions, 4032 flow [2024-06-14 14:05:27,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 281 transitions, 3785 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-14 14:05:27,474 INFO L231 Difference]: Finished difference. Result has 258 places, 248 transitions, 3030 flow [2024-06-14 14:05:27,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2939, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3030, PETRI_PLACES=258, PETRI_TRANSITIONS=248} [2024-06-14 14:05:27,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-14 14:05:27,475 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 248 transitions, 3030 flow [2024-06-14 14:05:27,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:27,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:27,475 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, 1, 1] [2024-06-14 14:05:27,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 14:05:27,475 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:27,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:27,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1330604952, now seen corresponding path program 8 times [2024-06-14 14:05:27,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:27,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841434974] [2024-06-14 14:05:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:27,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:27,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:27,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841434974] [2024-06-14 14:05:27,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841434974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:27,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:27,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:27,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255781134] [2024-06-14 14:05:27,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:27,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:27,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:27,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:27,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:27,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 248 transitions, 3030 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:27,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:27,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:27,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:28,278 INFO L124 PetriNetUnfolderBase]: 1843/3123 cut-off events. [2024-06-14 14:05:28,278 INFO L125 PetriNetUnfolderBase]: For 117165/117166 co-relation queries the response was YES. [2024-06-14 14:05:28,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18431 conditions, 3123 events. 1843/3123 cut-off events. For 117165/117166 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 19111 event pairs, 310 based on Foata normal form. 18/3135 useless extension candidates. Maximal degree in co-relation 18314. Up to 2402 conditions per place. [2024-06-14 14:05:28,310 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 207 selfloop transitions, 50 changer transitions 14/277 dead transitions. [2024-06-14 14:05:28,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 277 transitions, 3718 flow [2024-06-14 14:05:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:28,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 14:05:28,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:05:28,312 INFO L175 Difference]: Start difference. First operand has 258 places, 248 transitions, 3030 flow. Second operand 8 states and 180 transitions. [2024-06-14 14:05:28,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 277 transitions, 3718 flow [2024-06-14 14:05:28,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 277 transitions, 3610 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:28,738 INFO L231 Difference]: Finished difference. Result has 256 places, 242 transitions, 2973 flow [2024-06-14 14:05:28,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2922, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2973, PETRI_PLACES=256, PETRI_TRANSITIONS=242} [2024-06-14 14:05:28,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-14 14:05:28,739 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 242 transitions, 2973 flow [2024-06-14 14:05:28,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:28,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:28,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:28,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 14:05:28,740 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:28,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1394977240, now seen corresponding path program 9 times [2024-06-14 14:05:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:28,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520147653] [2024-06-14 14:05:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:28,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:28,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:28,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520147653] [2024-06-14 14:05:28,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520147653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:28,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:28,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:28,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315071788] [2024-06-14 14:05:28,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:28,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:28,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:28,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:29,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:29,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 242 transitions, 2973 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:29,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:29,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:29,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:29,541 INFO L124 PetriNetUnfolderBase]: 1954/3291 cut-off events. [2024-06-14 14:05:29,541 INFO L125 PetriNetUnfolderBase]: For 182447/182447 co-relation queries the response was YES. [2024-06-14 14:05:29,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21085 conditions, 3291 events. 1954/3291 cut-off events. For 182447/182447 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 20301 event pairs, 531 based on Foata normal form. 24/3310 useless extension candidates. Maximal degree in co-relation 20969. Up to 2233 conditions per place. [2024-06-14 14:05:29,633 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 160 selfloop transitions, 93 changer transitions 21/280 dead transitions. [2024-06-14 14:05:29,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 280 transitions, 3879 flow [2024-06-14 14:05:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-14 14:05:29,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 14:05:29,635 INFO L175 Difference]: Start difference. First operand has 256 places, 242 transitions, 2973 flow. Second operand 11 states and 231 transitions. [2024-06-14 14:05:29,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 280 transitions, 3879 flow [2024-06-14 14:05:30,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 280 transitions, 3748 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 14:05:30,174 INFO L231 Difference]: Finished difference. Result has 252 places, 236 transitions, 2959 flow [2024-06-14 14:05:30,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2959, PETRI_PLACES=252, PETRI_TRANSITIONS=236} [2024-06-14 14:05:30,175 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-14 14:05:30,175 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 236 transitions, 2959 flow [2024-06-14 14:05:30,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:30,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:30,175 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, 1, 1] [2024-06-14 14:05:30,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 14:05:30,176 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:30,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:30,176 INFO L85 PathProgramCache]: Analyzing trace with hash 509151676, now seen corresponding path program 1 times [2024-06-14 14:05:30,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:30,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009233736] [2024-06-14 14:05:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:30,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:30,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:30,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009233736] [2024-06-14 14:05:30,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009233736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:30,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:30,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:30,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405865057] [2024-06-14 14:05:30,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:30,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:30,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:30,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:30,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:30,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:30,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 236 transitions, 2959 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:30,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:30,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:30,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:30,953 INFO L124 PetriNetUnfolderBase]: 1856/3143 cut-off events. [2024-06-14 14:05:30,953 INFO L125 PetriNetUnfolderBase]: For 175858/175858 co-relation queries the response was YES. [2024-06-14 14:05:30,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20140 conditions, 3143 events. 1856/3143 cut-off events. For 175858/175858 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 19378 event pairs, 569 based on Foata normal form. 26/3164 useless extension candidates. Maximal degree in co-relation 20028. Up to 2628 conditions per place. [2024-06-14 14:05:30,986 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 151 selfloop transitions, 91 changer transitions 12/260 dead transitions. [2024-06-14 14:05:30,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 260 transitions, 3573 flow [2024-06-14 14:05:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-14 14:05:30,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:05:30,988 INFO L175 Difference]: Start difference. First operand has 252 places, 236 transitions, 2959 flow. Second operand 11 states and 220 transitions. [2024-06-14 14:05:30,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 260 transitions, 3573 flow [2024-06-14 14:05:31,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 260 transitions, 3415 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:31,502 INFO L231 Difference]: Finished difference. Result has 250 places, 232 transitions, 2960 flow [2024-06-14 14:05:31,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2960, PETRI_PLACES=250, PETRI_TRANSITIONS=232} [2024-06-14 14:05:31,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-14 14:05:31,503 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 232 transitions, 2960 flow [2024-06-14 14:05:31,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:31,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:31,503 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, 1, 1] [2024-06-14 14:05:31,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 14:05:31,503 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:31,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:31,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1892072862, now seen corresponding path program 2 times [2024-06-14 14:05:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:31,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076877159] [2024-06-14 14:05:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:31,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:31,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076877159] [2024-06-14 14:05:31,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076877159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:31,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:31,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:31,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081683621] [2024-06-14 14:05:31,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:31,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:31,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:31,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:31,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:31,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:31,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 232 transitions, 2960 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:31,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:31,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:31,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:32,287 INFO L124 PetriNetUnfolderBase]: 1841/3120 cut-off events. [2024-06-14 14:05:32,288 INFO L125 PetriNetUnfolderBase]: For 165058/165058 co-relation queries the response was YES. [2024-06-14 14:05:32,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20003 conditions, 3120 events. 1841/3120 cut-off events. For 165058/165058 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 19165 event pairs, 521 based on Foata normal form. 24/3139 useless extension candidates. Maximal degree in co-relation 19892. Up to 2580 conditions per place. [2024-06-14 14:05:32,317 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 146 selfloop transitions, 85 changer transitions 23/260 dead transitions. [2024-06-14 14:05:32,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 260 transitions, 3620 flow [2024-06-14 14:05:32,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:32,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-14 14:05:32,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022727272727273 [2024-06-14 14:05:32,324 INFO L175 Difference]: Start difference. First operand has 250 places, 232 transitions, 2960 flow. Second operand 11 states and 221 transitions. [2024-06-14 14:05:32,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 260 transitions, 3620 flow [2024-06-14 14:05:32,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 260 transitions, 3434 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:05:32,845 INFO L231 Difference]: Finished difference. Result has 248 places, 225 transitions, 2856 flow [2024-06-14 14:05:32,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2856, PETRI_PLACES=248, PETRI_TRANSITIONS=225} [2024-06-14 14:05:32,846 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-14 14:05:32,846 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 225 transitions, 2856 flow [2024-06-14 14:05:32,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:32,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:32,847 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, 1, 1] [2024-06-14 14:05:32,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 14:05:32,847 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:32,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:32,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1472657340, now seen corresponding path program 3 times [2024-06-14 14:05:32,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:32,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374635621] [2024-06-14 14:05:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:32,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:33,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:33,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374635621] [2024-06-14 14:05:33,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374635621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:33,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:33,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:33,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360900765] [2024-06-14 14:05:33,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:33,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:33,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:33,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:33,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 225 transitions, 2856 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:33,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:33,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:33,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:33,721 INFO L124 PetriNetUnfolderBase]: 2013/3434 cut-off events. [2024-06-14 14:05:33,721 INFO L125 PetriNetUnfolderBase]: For 195556/195556 co-relation queries the response was YES. [2024-06-14 14:05:33,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22653 conditions, 3434 events. 2013/3434 cut-off events. For 195556/195556 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 21773 event pairs, 374 based on Foata normal form. 18/3447 useless extension candidates. Maximal degree in co-relation 22543. Up to 1451 conditions per place. [2024-06-14 14:05:33,756 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 102 changer transitions 17/272 dead transitions. [2024-06-14 14:05:33,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 272 transitions, 3943 flow [2024-06-14 14:05:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-14 14:05:33,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-14 14:05:33,757 INFO L175 Difference]: Start difference. First operand has 248 places, 225 transitions, 2856 flow. Second operand 10 states and 221 transitions. [2024-06-14 14:05:33,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 272 transitions, 3943 flow [2024-06-14 14:05:34,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 272 transitions, 3747 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 14:05:34,619 INFO L231 Difference]: Finished difference. Result has 244 places, 223 transitions, 2869 flow [2024-06-14 14:05:34,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2869, PETRI_PLACES=244, PETRI_TRANSITIONS=223} [2024-06-14 14:05:34,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-14 14:05:34,620 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 223 transitions, 2869 flow [2024-06-14 14:05:34,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:34,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:34,621 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, 1, 1] [2024-06-14 14:05:34,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 14:05:34,621 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:34,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:34,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1480999440, now seen corresponding path program 4 times [2024-06-14 14:05:34,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:34,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332939959] [2024-06-14 14:05:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:34,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:34,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:34,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332939959] [2024-06-14 14:05:34,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332939959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:34,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:34,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:34,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81388705] [2024-06-14 14:05:34,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:34,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:34,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:34,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:34,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 223 transitions, 2869 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:34,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:34,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:34,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:35,475 INFO L124 PetriNetUnfolderBase]: 2013/3448 cut-off events. [2024-06-14 14:05:35,476 INFO L125 PetriNetUnfolderBase]: For 216202/216202 co-relation queries the response was YES. [2024-06-14 14:05:35,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23765 conditions, 3448 events. 2013/3448 cut-off events. For 216202/216202 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 22017 event pairs, 446 based on Foata normal form. 18/3461 useless extension candidates. Maximal degree in co-relation 23655. Up to 1451 conditions per place. [2024-06-14 14:05:35,511 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 158 selfloop transitions, 90 changer transitions 10/264 dead transitions. [2024-06-14 14:05:35,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 264 transitions, 3883 flow [2024-06-14 14:05:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 14:05:35,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-06-14 14:05:35,512 INFO L175 Difference]: Start difference. First operand has 244 places, 223 transitions, 2869 flow. Second operand 10 states and 219 transitions. [2024-06-14 14:05:35,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 264 transitions, 3883 flow [2024-06-14 14:05:36,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 264 transitions, 3649 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-14 14:05:36,209 INFO L231 Difference]: Finished difference. Result has 243 places, 220 transitions, 2806 flow [2024-06-14 14:05:36,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2653, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2806, PETRI_PLACES=243, PETRI_TRANSITIONS=220} [2024-06-14 14:05:36,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-14 14:05:36,210 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 220 transitions, 2806 flow [2024-06-14 14:05:36,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:36,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:36,210 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, 1, 1] [2024-06-14 14:05:36,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 14:05:36,211 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:36,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:36,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1480989210, now seen corresponding path program 5 times [2024-06-14 14:05:36,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:36,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726547755] [2024-06-14 14:05:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:36,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:36,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:36,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726547755] [2024-06-14 14:05:36,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726547755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:36,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:36,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:36,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452903828] [2024-06-14 14:05:36,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:36,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:36,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:36,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:36,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 220 transitions, 2806 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:36,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:36,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:36,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:37,036 INFO L124 PetriNetUnfolderBase]: 1884/3225 cut-off events. [2024-06-14 14:05:37,037 INFO L125 PetriNetUnfolderBase]: For 175111/175111 co-relation queries the response was YES. [2024-06-14 14:05:37,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21363 conditions, 3225 events. 1884/3225 cut-off events. For 175111/175111 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 20283 event pairs, 444 based on Foata normal form. 18/3238 useless extension candidates. Maximal degree in co-relation 21255. Up to 1451 conditions per place. [2024-06-14 14:05:37,082 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 150 selfloop transitions, 84 changer transitions 17/257 dead transitions. [2024-06-14 14:05:37,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 257 transitions, 3638 flow [2024-06-14 14:05:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 14:05:37,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 14:05:37,084 INFO L175 Difference]: Start difference. First operand has 243 places, 220 transitions, 2806 flow. Second operand 10 states and 215 transitions. [2024-06-14 14:05:37,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 257 transitions, 3638 flow [2024-06-14 14:05:37,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 257 transitions, 3448 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 14:05:37,851 INFO L231 Difference]: Finished difference. Result has 240 places, 213 transitions, 2670 flow [2024-06-14 14:05:37,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2670, PETRI_PLACES=240, PETRI_TRANSITIONS=213} [2024-06-14 14:05:37,851 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-14 14:05:37,851 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 213 transitions, 2670 flow [2024-06-14 14:05:37,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:37,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:37,851 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, 1, 1] [2024-06-14 14:05:37,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 14:05:37,852 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:37,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:37,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1538879850, now seen corresponding path program 6 times [2024-06-14 14:05:37,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:37,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303281607] [2024-06-14 14:05:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:37,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:38,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:38,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303281607] [2024-06-14 14:05:38,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303281607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:38,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:38,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:38,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314415452] [2024-06-14 14:05:38,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:38,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:38,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:38,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:38,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:38,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:38,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 213 transitions, 2670 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:38,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:38,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:38,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:38,681 INFO L124 PetriNetUnfolderBase]: 1979/3366 cut-off events. [2024-06-14 14:05:38,681 INFO L125 PetriNetUnfolderBase]: For 229976/229976 co-relation queries the response was YES. [2024-06-14 14:05:38,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23482 conditions, 3366 events. 1979/3366 cut-off events. For 229976/229976 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 21283 event pairs, 686 based on Foata normal form. 24/3385 useless extension candidates. Maximal degree in co-relation 23376. Up to 2618 conditions per place. [2024-06-14 14:05:38,717 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 79 changer transitions 10/242 dead transitions. [2024-06-14 14:05:38,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 242 transitions, 3418 flow [2024-06-14 14:05:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:05:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:05:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-14 14:05:38,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-14 14:05:38,719 INFO L175 Difference]: Start difference. First operand has 240 places, 213 transitions, 2670 flow. Second operand 12 states and 242 transitions. [2024-06-14 14:05:38,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 242 transitions, 3418 flow [2024-06-14 14:05:39,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 242 transitions, 3215 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-14 14:05:39,731 INFO L231 Difference]: Finished difference. Result has 237 places, 210 transitions, 2599 flow [2024-06-14 14:05:39,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2599, PETRI_PLACES=237, PETRI_TRANSITIONS=210} [2024-06-14 14:05:39,731 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-14 14:05:39,732 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 210 transitions, 2599 flow [2024-06-14 14:05:39,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:39,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:39,732 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, 1, 1] [2024-06-14 14:05:39,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 14:05:39,732 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:39,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:39,733 INFO L85 PathProgramCache]: Analyzing trace with hash -73855846, now seen corresponding path program 7 times [2024-06-14 14:05:39,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:39,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254018069] [2024-06-14 14:05:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:39,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:39,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:39,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254018069] [2024-06-14 14:05:39,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254018069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:39,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:39,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:39,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746787429] [2024-06-14 14:05:39,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:39,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:39,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:39,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:39,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 210 transitions, 2599 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:39,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:39,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:39,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:40,536 INFO L124 PetriNetUnfolderBase]: 1955/3314 cut-off events. [2024-06-14 14:05:40,536 INFO L125 PetriNetUnfolderBase]: For 233060/233060 co-relation queries the response was YES. [2024-06-14 14:05:40,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23066 conditions, 3314 events. 1955/3314 cut-off events. For 233060/233060 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 20803 event pairs, 718 based on Foata normal form. 26/3335 useless extension candidates. Maximal degree in co-relation 22962. Up to 2829 conditions per place. [2024-06-14 14:05:40,569 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 138 selfloop transitions, 73 changer transitions 15/232 dead transitions. [2024-06-14 14:05:40,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 232 transitions, 3147 flow [2024-06-14 14:05:40,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:05:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:05:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-06-14 14:05:40,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-06-14 14:05:40,571 INFO L175 Difference]: Start difference. First operand has 237 places, 210 transitions, 2599 flow. Second operand 12 states and 235 transitions. [2024-06-14 14:05:40,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 232 transitions, 3147 flow [2024-06-14 14:05:41,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 232 transitions, 2991 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 14:05:41,404 INFO L231 Difference]: Finished difference. Result has 236 places, 204 transitions, 2541 flow [2024-06-14 14:05:41,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2541, PETRI_PLACES=236, PETRI_TRANSITIONS=204} [2024-06-14 14:05:41,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-14 14:05:41,404 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 204 transitions, 2541 flow [2024-06-14 14:05:41,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:41,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:41,405 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, 1, 1] [2024-06-14 14:05:41,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 14:05:41,406 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:41,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash -63845326, now seen corresponding path program 8 times [2024-06-14 14:05:41,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:41,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769167439] [2024-06-14 14:05:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:41,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:41,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:41,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769167439] [2024-06-14 14:05:41,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769167439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:41,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:41,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:41,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230979932] [2024-06-14 14:05:41,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:41,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:41,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:41,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:41,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:41,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:41,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 204 transitions, 2541 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:41,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:41,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:41,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:42,208 INFO L124 PetriNetUnfolderBase]: 1937/3300 cut-off events. [2024-06-14 14:05:42,208 INFO L125 PetriNetUnfolderBase]: For 222231/222231 co-relation queries the response was YES. [2024-06-14 14:05:42,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22809 conditions, 3300 events. 1937/3300 cut-off events. For 222231/222231 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 20868 event pairs, 668 based on Foata normal form. 24/3319 useless extension candidates. Maximal degree in co-relation 22706. Up to 2490 conditions per place. [2024-06-14 14:05:42,240 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 144 selfloop transitions, 68 changer transitions 13/231 dead transitions. [2024-06-14 14:05:42,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 231 transitions, 3261 flow [2024-06-14 14:05:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:42,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 14:05:42,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225 [2024-06-14 14:05:42,241 INFO L175 Difference]: Start difference. First operand has 236 places, 204 transitions, 2541 flow. Second operand 10 states and 209 transitions. [2024-06-14 14:05:42,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 231 transitions, 3261 flow [2024-06-14 14:05:42,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 231 transitions, 3103 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-14 14:05:42,854 INFO L231 Difference]: Finished difference. Result has 230 places, 198 transitions, 2433 flow [2024-06-14 14:05:42,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2433, PETRI_PLACES=230, PETRI_TRANSITIONS=198} [2024-06-14 14:05:42,854 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-14 14:05:42,854 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 198 transitions, 2433 flow [2024-06-14 14:05:42,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:42,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:42,855 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, 1, 1] [2024-06-14 14:05:42,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 14:05:42,855 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:42,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:42,855 INFO L85 PathProgramCache]: Analyzing trace with hash -68429296, now seen corresponding path program 9 times [2024-06-14 14:05:42,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:42,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284832326] [2024-06-14 14:05:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:42,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:43,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:43,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284832326] [2024-06-14 14:05:43,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284832326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:43,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:43,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:43,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165764622] [2024-06-14 14:05:43,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:43,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:43,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:43,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:43,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:43,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:43,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 198 transitions, 2433 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:43,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:43,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:43,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:43,673 INFO L124 PetriNetUnfolderBase]: 1934/3327 cut-off events. [2024-06-14 14:05:43,674 INFO L125 PetriNetUnfolderBase]: For 224801/224801 co-relation queries the response was YES. [2024-06-14 14:05:43,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23325 conditions, 3327 events. 1934/3327 cut-off events. For 224801/224801 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21325 event pairs, 652 based on Foata normal form. 18/3340 useless extension candidates. Maximal degree in co-relation 23224. Up to 2336 conditions per place. [2024-06-14 14:05:43,702 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 144 selfloop transitions, 72 changer transitions 10/232 dead transitions. [2024-06-14 14:05:43,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 232 transitions, 3303 flow [2024-06-14 14:05:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-14 14:05:43,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 14:05:43,703 INFO L175 Difference]: Start difference. First operand has 230 places, 198 transitions, 2433 flow. Second operand 11 states and 231 transitions. [2024-06-14 14:05:43,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 232 transitions, 3303 flow [2024-06-14 14:05:44,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 232 transitions, 3146 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 14:05:44,526 INFO L231 Difference]: Finished difference. Result has 229 places, 195 transitions, 2405 flow [2024-06-14 14:05:44,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2405, PETRI_PLACES=229, PETRI_TRANSITIONS=195} [2024-06-14 14:05:44,527 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-14 14:05:44,527 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 195 transitions, 2405 flow [2024-06-14 14:05:44,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:44,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:44,527 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, 1, 1] [2024-06-14 14:05:44,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 14:05:44,527 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:44,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:44,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1539081660, now seen corresponding path program 10 times [2024-06-14 14:05:44,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:44,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63337496] [2024-06-14 14:05:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:44,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:44,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:44,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63337496] [2024-06-14 14:05:44,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63337496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:44,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:44,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:44,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246201093] [2024-06-14 14:05:44,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:44,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:44,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:44,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:44,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:44,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:44,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 195 transitions, 2405 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:44,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:44,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:44,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:45,263 INFO L124 PetriNetUnfolderBase]: 1805/3100 cut-off events. [2024-06-14 14:05:45,263 INFO L125 PetriNetUnfolderBase]: For 190996/190996 co-relation queries the response was YES. [2024-06-14 14:05:45,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21277 conditions, 3100 events. 1805/3100 cut-off events. For 190996/190996 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 19639 event pairs, 638 based on Foata normal form. 18/3113 useless extension candidates. Maximal degree in co-relation 21176. Up to 2336 conditions per place. [2024-06-14 14:05:45,294 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 136 selfloop transitions, 68 changer transitions 15/225 dead transitions. [2024-06-14 14:05:45,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 225 transitions, 3115 flow [2024-06-14 14:05:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-14 14:05:45,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159090909090909 [2024-06-14 14:05:45,295 INFO L175 Difference]: Start difference. First operand has 229 places, 195 transitions, 2405 flow. Second operand 11 states and 227 transitions. [2024-06-14 14:05:45,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 225 transitions, 3115 flow [2024-06-14 14:05:46,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 225 transitions, 2961 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-14 14:05:46,112 INFO L231 Difference]: Finished difference. Result has 226 places, 190 transitions, 2315 flow [2024-06-14 14:05:46,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2315, PETRI_PLACES=226, PETRI_TRANSITIONS=190} [2024-06-14 14:05:46,113 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-14 14:05:46,113 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 190 transitions, 2315 flow [2024-06-14 14:05:46,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:46,113 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, 1, 1] [2024-06-14 14:05:46,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 14:05:46,114 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:46,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:46,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1539200700, now seen corresponding path program 11 times [2024-06-14 14:05:46,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:46,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103156890] [2024-06-14 14:05:46,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:46,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:46,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:46,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103156890] [2024-06-14 14:05:46,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103156890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:46,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:46,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:46,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202844776] [2024-06-14 14:05:46,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:46,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:46,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:46,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 190 transitions, 2315 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:46,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:46,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:46,789 INFO L124 PetriNetUnfolderBase]: 1674/2859 cut-off events. [2024-06-14 14:05:46,789 INFO L125 PetriNetUnfolderBase]: For 164111/164111 co-relation queries the response was YES. [2024-06-14 14:05:46,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18737 conditions, 2859 events. 1674/2859 cut-off events. For 164111/164111 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17589 event pairs, 615 based on Foata normal form. 26/2880 useless extension candidates. Maximal degree in co-relation 18638. Up to 2398 conditions per place. [2024-06-14 14:05:46,815 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 128 selfloop transitions, 57 changer transitions 19/210 dead transitions. [2024-06-14 14:05:46,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 210 transitions, 2815 flow [2024-06-14 14:05:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-14 14:05:46,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-06-14 14:05:46,816 INFO L175 Difference]: Start difference. First operand has 226 places, 190 transitions, 2315 flow. Second operand 10 states and 202 transitions. [2024-06-14 14:05:46,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 210 transitions, 2815 flow [2024-06-14 14:05:47,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 210 transitions, 2612 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-14 14:05:47,363 INFO L231 Difference]: Finished difference. Result has 220 places, 179 transitions, 2114 flow [2024-06-14 14:05:47,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2114, PETRI_PLACES=220, PETRI_TRANSITIONS=179} [2024-06-14 14:05:47,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-14 14:05:47,364 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 179 transitions, 2114 flow [2024-06-14 14:05:47,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:47,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:47,364 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, 1, 1] [2024-06-14 14:05:47,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 14:05:47,365 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:47,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash 275413730, now seen corresponding path program 12 times [2024-06-14 14:05:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:47,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133017002] [2024-06-14 14:05:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:47,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:47,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:47,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133017002] [2024-06-14 14:05:47,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133017002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:47,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:47,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:47,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58416390] [2024-06-14 14:05:47,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:47,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:47,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:47,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:47,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:47,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:47,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 179 transitions, 2114 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:47,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:47,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:47,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:48,095 INFO L124 PetriNetUnfolderBase]: 1774/3023 cut-off events. [2024-06-14 14:05:48,096 INFO L125 PetriNetUnfolderBase]: For 198560/198560 co-relation queries the response was YES. [2024-06-14 14:05:48,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20586 conditions, 3023 events. 1774/3023 cut-off events. For 198560/198560 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 18934 event pairs, 644 based on Foata normal form. 24/3043 useless extension candidates. Maximal degree in co-relation 20489. Up to 2336 conditions per place. [2024-06-14 14:05:48,123 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 149 selfloop transitions, 39 changer transitions 10/204 dead transitions. [2024-06-14 14:05:48,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 204 transitions, 2770 flow [2024-06-14 14:05:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 14:05:48,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-14 14:05:48,124 INFO L175 Difference]: Start difference. First operand has 220 places, 179 transitions, 2114 flow. Second operand 8 states and 174 transitions. [2024-06-14 14:05:48,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 204 transitions, 2770 flow [2024-06-14 14:05:48,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 204 transitions, 2630 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-14 14:05:48,599 INFO L231 Difference]: Finished difference. Result has 209 places, 176 transitions, 2000 flow [2024-06-14 14:05:48,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2000, PETRI_PLACES=209, PETRI_TRANSITIONS=176} [2024-06-14 14:05:48,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-14 14:05:48,600 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 176 transitions, 2000 flow [2024-06-14 14:05:48,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:48,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:48,600 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, 1, 1] [2024-06-14 14:05:48,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 14:05:48,601 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:48,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash 445936670, now seen corresponding path program 13 times [2024-06-14 14:05:48,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:48,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327591517] [2024-06-14 14:05:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:48,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:48,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:48,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327591517] [2024-06-14 14:05:48,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327591517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:48,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:48,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:48,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540451239] [2024-06-14 14:05:48,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:48,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:48,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:48,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:48,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:48,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 176 transitions, 2000 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:48,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:48,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:48,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:49,290 INFO L124 PetriNetUnfolderBase]: 1750/2987 cut-off events. [2024-06-14 14:05:49,290 INFO L125 PetriNetUnfolderBase]: For 187265/187265 co-relation queries the response was YES. [2024-06-14 14:05:49,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20060 conditions, 2987 events. 1750/2987 cut-off events. For 187265/187265 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 18722 event pairs, 700 based on Foata normal form. 26/3009 useless extension candidates. Maximal degree in co-relation 19966. Up to 2579 conditions per place. [2024-06-14 14:05:49,316 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 142 selfloop transitions, 35 changer transitions 12/195 dead transitions. [2024-06-14 14:05:49,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 195 transitions, 2468 flow [2024-06-14 14:05:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 14:05:49,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-14 14:05:49,317 INFO L175 Difference]: Start difference. First operand has 209 places, 176 transitions, 2000 flow. Second operand 9 states and 185 transitions. [2024-06-14 14:05:49,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 195 transitions, 2468 flow [2024-06-14 14:05:49,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 195 transitions, 2385 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:49,899 INFO L231 Difference]: Finished difference. Result has 209 places, 172 transitions, 1948 flow [2024-06-14 14:05:49,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1948, PETRI_PLACES=209, PETRI_TRANSITIONS=172} [2024-06-14 14:05:49,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-14 14:05:49,900 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 172 transitions, 1948 flow [2024-06-14 14:05:49,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:49,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:49,900 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, 1, 1] [2024-06-14 14:05:49,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 14:05:49,900 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:49,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2009165828, now seen corresponding path program 14 times [2024-06-14 14:05:49,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:49,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546144694] [2024-06-14 14:05:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:49,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:50,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:50,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546144694] [2024-06-14 14:05:50,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546144694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:50,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:50,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:50,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898882953] [2024-06-14 14:05:50,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:50,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:50,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:50,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:50,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:50,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:50,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 172 transitions, 1948 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:50,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:50,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:50,632 INFO L124 PetriNetUnfolderBase]: 1616/2771 cut-off events. [2024-06-14 14:05:50,633 INFO L125 PetriNetUnfolderBase]: For 150660/150660 co-relation queries the response was YES. [2024-06-14 14:05:50,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17604 conditions, 2771 events. 1616/2771 cut-off events. For 150660/150660 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17099 event pairs, 623 based on Foata normal form. 26/2793 useless extension candidates. Maximal degree in co-relation 17510. Up to 2368 conditions per place. [2024-06-14 14:05:50,663 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 141 selfloop transitions, 31 changer transitions 12/190 dead transitions. [2024-06-14 14:05:50,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 190 transitions, 2404 flow [2024-06-14 14:05:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 14:05:50,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-14 14:05:50,665 INFO L175 Difference]: Start difference. First operand has 209 places, 172 transitions, 1948 flow. Second operand 8 states and 166 transitions. [2024-06-14 14:05:50,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 190 transitions, 2404 flow [2024-06-14 14:05:51,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 190 transitions, 2330 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:51,252 INFO L231 Difference]: Finished difference. Result has 206 places, 168 transitions, 1903 flow [2024-06-14 14:05:51,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1903, PETRI_PLACES=206, PETRI_TRANSITIONS=168} [2024-06-14 14:05:51,252 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-14 14:05:51,252 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 168 transitions, 1903 flow [2024-06-14 14:05:51,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:51,253 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, 1, 1] [2024-06-14 14:05:51,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 14:05:51,253 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:51,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash -115767114, now seen corresponding path program 15 times [2024-06-14 14:05:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:51,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775628954] [2024-06-14 14:05:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:51,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:51,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:51,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775628954] [2024-06-14 14:05:51,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775628954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:51,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:51,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:51,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789759148] [2024-06-14 14:05:51,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:51,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:51,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:51,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:51,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 168 transitions, 1903 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:51,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:51,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:51,929 INFO L124 PetriNetUnfolderBase]: 1601/2764 cut-off events. [2024-06-14 14:05:51,930 INFO L125 PetriNetUnfolderBase]: For 141386/141386 co-relation queries the response was YES. [2024-06-14 14:05:51,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17397 conditions, 2764 events. 1601/2764 cut-off events. For 141386/141386 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 17209 event pairs, 575 based on Foata normal form. 24/2784 useless extension candidates. Maximal degree in co-relation 17304. Up to 2288 conditions per place. [2024-06-14 14:05:51,959 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 145 selfloop transitions, 29 changer transitions 11/191 dead transitions. [2024-06-14 14:05:51,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 191 transitions, 2401 flow [2024-06-14 14:05:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 14:05:51,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194444444444445 [2024-06-14 14:05:51,961 INFO L175 Difference]: Start difference. First operand has 206 places, 168 transitions, 1903 flow. Second operand 9 states and 187 transitions. [2024-06-14 14:05:51,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 191 transitions, 2401 flow [2024-06-14 14:05:52,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 191 transitions, 2331 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:52,573 INFO L231 Difference]: Finished difference. Result has 206 places, 164 transitions, 1831 flow [2024-06-14 14:05:52,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1831, PETRI_PLACES=206, PETRI_TRANSITIONS=164} [2024-06-14 14:05:52,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-14 14:05:52,573 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 164 transitions, 1831 flow [2024-06-14 14:05:52,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:52,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:52,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:52,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 14:05:52,574 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:52,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:52,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2009313698, now seen corresponding path program 16 times [2024-06-14 14:05:52,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:52,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546922896] [2024-06-14 14:05:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:52,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:52,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:52,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546922896] [2024-06-14 14:05:52,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546922896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:52,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:52,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:52,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118200303] [2024-06-14 14:05:52,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:52,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:52,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:52,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:52,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:52,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:52,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 164 transitions, 1831 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:52,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:52,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:52,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:53,305 INFO L124 PetriNetUnfolderBase]: 1723/2944 cut-off events. [2024-06-14 14:05:53,305 INFO L125 PetriNetUnfolderBase]: For 177995/177995 co-relation queries the response was YES. [2024-06-14 14:05:53,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19569 conditions, 2944 events. 1723/2944 cut-off events. For 177995/177995 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 18288 event pairs, 652 based on Foata normal form. 24/2964 useless extension candidates. Maximal degree in co-relation 19476. Up to 2310 conditions per place. [2024-06-14 14:05:53,332 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 148 selfloop transitions, 25 changer transitions 11/190 dead transitions. [2024-06-14 14:05:53,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 190 transitions, 2465 flow [2024-06-14 14:05:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 14:05:53,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-14 14:05:53,334 INFO L175 Difference]: Start difference. First operand has 206 places, 164 transitions, 1831 flow. Second operand 8 states and 170 transitions. [2024-06-14 14:05:53,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 190 transitions, 2465 flow [2024-06-14 14:05:54,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 190 transitions, 2396 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:05:54,034 INFO L231 Difference]: Finished difference. Result has 204 places, 161 transitions, 1777 flow [2024-06-14 14:05:54,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1777, PETRI_PLACES=204, PETRI_TRANSITIONS=161} [2024-06-14 14:05:54,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-14 14:05:54,035 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 161 transitions, 1777 flow [2024-06-14 14:05:54,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:54,035 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, 1, 1] [2024-06-14 14:05:54,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 14:05:54,036 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:54,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:54,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1999334798, now seen corresponding path program 17 times [2024-06-14 14:05:54,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:54,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543979463] [2024-06-14 14:05:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:54,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:54,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:54,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543979463] [2024-06-14 14:05:54,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543979463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:54,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:54,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:54,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468731253] [2024-06-14 14:05:54,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:54,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:54,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:54,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:54,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 161 transitions, 1777 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:54,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:54,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:54,641 INFO L124 PetriNetUnfolderBase]: 1571/2682 cut-off events. [2024-06-14 14:05:54,641 INFO L125 PetriNetUnfolderBase]: For 145755/145755 co-relation queries the response was YES. [2024-06-14 14:05:54,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16996 conditions, 2682 events. 1571/2682 cut-off events. For 145755/145755 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16313 event pairs, 607 based on Foata normal form. 26/2704 useless extension candidates. Maximal degree in co-relation 16902. Up to 2310 conditions per place. [2024-06-14 14:05:54,664 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 138 selfloop transitions, 22 changer transitions 13/179 dead transitions. [2024-06-14 14:05:54,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 179 transitions, 2211 flow [2024-06-14 14:05:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 14:05:54,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-14 14:05:54,665 INFO L175 Difference]: Start difference. First operand has 204 places, 161 transitions, 1777 flow. Second operand 8 states and 165 transitions. [2024-06-14 14:05:54,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 179 transitions, 2211 flow [2024-06-14 14:05:55,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 179 transitions, 2133 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 14:05:55,256 INFO L231 Difference]: Finished difference. Result has 201 places, 156 transitions, 1692 flow [2024-06-14 14:05:55,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1692, PETRI_PLACES=201, PETRI_TRANSITIONS=156} [2024-06-14 14:05:55,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-14 14:05:55,257 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 156 transitions, 1692 flow [2024-06-14 14:05:55,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:55,257 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, 1, 1] [2024-06-14 14:05:55,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 14:05:55,257 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:55,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:55,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2003749508, now seen corresponding path program 18 times [2024-06-14 14:05:55,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:55,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913734164] [2024-06-14 14:05:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:55,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:55,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:55,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913734164] [2024-06-14 14:05:55,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913734164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:55,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:55,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:55,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639805225] [2024-06-14 14:05:55,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:55,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:55,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:55,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:55,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:55,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:55,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 156 transitions, 1692 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:55,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:55,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:55,911 INFO L124 PetriNetUnfolderBase]: 1636/2817 cut-off events. [2024-06-14 14:05:55,911 INFO L125 PetriNetUnfolderBase]: For 157557/157557 co-relation queries the response was YES. [2024-06-14 14:05:55,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18271 conditions, 2817 events. 1636/2817 cut-off events. For 157557/157557 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 17399 event pairs, 462 based on Foata normal form. 18/2831 useless extension candidates. Maximal degree in co-relation 18179. Up to 2152 conditions per place. [2024-06-14 14:05:55,940 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 146 selfloop transitions, 27 changer transitions 8/187 dead transitions. [2024-06-14 14:05:55,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 187 transitions, 2330 flow [2024-06-14 14:05:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 14:05:55,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-14 14:05:55,942 INFO L175 Difference]: Start difference. First operand has 201 places, 156 transitions, 1692 flow. Second operand 8 states and 175 transitions. [2024-06-14 14:05:55,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 187 transitions, 2330 flow [2024-06-14 14:05:56,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 187 transitions, 2250 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:56,555 INFO L231 Difference]: Finished difference. Result has 197 places, 155 transitions, 1658 flow [2024-06-14 14:05:56,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1658, PETRI_PLACES=197, PETRI_TRANSITIONS=155} [2024-06-14 14:05:56,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-14 14:05:56,555 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 155 transitions, 1658 flow [2024-06-14 14:05:56,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:56,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:56,556 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, 1, 1] [2024-06-14 14:05:56,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 14:05:56,556 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:56,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2003739278, now seen corresponding path program 19 times [2024-06-14 14:05:56,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:56,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695209324] [2024-06-14 14:05:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:56,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:56,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:56,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695209324] [2024-06-14 14:05:56,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695209324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:56,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:56,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:56,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491954851] [2024-06-14 14:05:56,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:56,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:56,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:56,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:56,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:56,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:56,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 155 transitions, 1658 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:56,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:56,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:56,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:57,215 INFO L124 PetriNetUnfolderBase]: 1531/2630 cut-off events. [2024-06-14 14:05:57,215 INFO L125 PetriNetUnfolderBase]: For 134555/134555 co-relation queries the response was YES. [2024-06-14 14:05:57,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16590 conditions, 2630 events. 1531/2630 cut-off events. For 134555/134555 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15975 event pairs, 438 based on Foata normal form. 18/2644 useless extension candidates. Maximal degree in co-relation 16499. Up to 2152 conditions per place. [2024-06-14 14:05:57,237 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 25 changer transitions 10/182 dead transitions. [2024-06-14 14:05:57,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 182 transitions, 2146 flow [2024-06-14 14:05:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 14:05:57,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 14:05:57,238 INFO L175 Difference]: Start difference. First operand has 197 places, 155 transitions, 1658 flow. Second operand 8 states and 172 transitions. [2024-06-14 14:05:57,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 182 transitions, 2146 flow [2024-06-14 14:05:57,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 182 transitions, 2088 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:57,874 INFO L231 Difference]: Finished difference. Result has 197 places, 151 transitions, 1599 flow [2024-06-14 14:05:57,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1599, PETRI_PLACES=197, PETRI_TRANSITIONS=151} [2024-06-14 14:05:57,874 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-14 14:05:57,874 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 151 transitions, 1599 flow [2024-06-14 14:05:57,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:57,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:57,875 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, 1, 1] [2024-06-14 14:05:57,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 14:05:57,875 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:57,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash 120472788, now seen corresponding path program 1 times [2024-06-14 14:05:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:57,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765591251] [2024-06-14 14:05:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:57,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:58,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:58,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765591251] [2024-06-14 14:05:58,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765591251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:58,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:58,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941786093] [2024-06-14 14:05:58,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:58,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:58,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:58,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:58,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 151 transitions, 1599 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:58,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:58,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:58,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:58,506 INFO L124 PetriNetUnfolderBase]: 1504/2579 cut-off events. [2024-06-14 14:05:58,506 INFO L125 PetriNetUnfolderBase]: For 133608/133608 co-relation queries the response was YES. [2024-06-14 14:05:58,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16309 conditions, 2579 events. 1504/2579 cut-off events. For 133608/133608 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15595 event pairs, 500 based on Foata normal form. 18/2593 useless extension candidates. Maximal degree in co-relation 16219. Up to 2234 conditions per place. [2024-06-14 14:05:58,529 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 138 selfloop transitions, 12 changer transitions 12/168 dead transitions. [2024-06-14 14:05:58,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 168 transitions, 2011 flow [2024-06-14 14:05:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 14:05:58,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2024-06-14 14:05:58,530 INFO L175 Difference]: Start difference. First operand has 197 places, 151 transitions, 1599 flow. Second operand 7 states and 143 transitions. [2024-06-14 14:05:58,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 168 transitions, 2011 flow [2024-06-14 14:05:59,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 168 transitions, 1908 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-14 14:05:59,101 INFO L231 Difference]: Finished difference. Result has 190 places, 149 transitions, 1498 flow [2024-06-14 14:05:59,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1498, PETRI_PLACES=190, PETRI_TRANSITIONS=149} [2024-06-14 14:05:59,102 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-14 14:05:59,102 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 149 transitions, 1498 flow [2024-06-14 14:05:59,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:59,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:59,102 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, 1, 1] [2024-06-14 14:05:59,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 14:05:59,103 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:59,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash 120592758, now seen corresponding path program 2 times [2024-06-14 14:05:59,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:59,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503078658] [2024-06-14 14:05:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:59,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:59,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:59,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503078658] [2024-06-14 14:05:59,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503078658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:59,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:59,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:59,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124451730] [2024-06-14 14:05:59,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:59,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:59,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:59,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:59,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 149 transitions, 1498 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:59,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:59,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:59,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:59,712 INFO L124 PetriNetUnfolderBase]: 1480/2527 cut-off events. [2024-06-14 14:05:59,713 INFO L125 PetriNetUnfolderBase]: For 133573/133573 co-relation queries the response was YES. [2024-06-14 14:05:59,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15901 conditions, 2527 events. 1480/2527 cut-off events. For 133573/133573 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15156 event pairs, 479 based on Foata normal form. 18/2541 useless extension candidates. Maximal degree in co-relation 15813. Up to 2092 conditions per place. [2024-06-14 14:05:59,733 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 134 selfloop transitions, 23 changer transitions 11/174 dead transitions. [2024-06-14 14:05:59,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 174 transitions, 1968 flow [2024-06-14 14:05:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 14:05:59,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-14 14:05:59,734 INFO L175 Difference]: Start difference. First operand has 190 places, 149 transitions, 1498 flow. Second operand 9 states and 184 transitions. [2024-06-14 14:05:59,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 174 transitions, 1968 flow [2024-06-14 14:06:00,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 174 transitions, 1916 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:00,298 INFO L231 Difference]: Finished difference. Result has 190 places, 144 transitions, 1451 flow [2024-06-14 14:06:00,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1451, PETRI_PLACES=190, PETRI_TRANSITIONS=144} [2024-06-14 14:06:00,299 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-14 14:06:00,299 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 144 transitions, 1451 flow [2024-06-14 14:06:00,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:00,299 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, 1, 1] [2024-06-14 14:06:00,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 14:06:00,299 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:00,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash 210948212, now seen corresponding path program 20 times [2024-06-14 14:06:00,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:00,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556504824] [2024-06-14 14:06:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:00,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:00,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:00,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556504824] [2024-06-14 14:06:00,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556504824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:00,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:00,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:00,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088250278] [2024-06-14 14:06:00,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:00,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:00,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:00,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:00,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:00,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:00,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 144 transitions, 1451 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:00,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:00,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:01,118 INFO L124 PetriNetUnfolderBase]: 1719/2966 cut-off events. [2024-06-14 14:06:01,118 INFO L125 PetriNetUnfolderBase]: For 212784/212784 co-relation queries the response was YES. [2024-06-14 14:06:01,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20756 conditions, 2966 events. 1719/2966 cut-off events. For 212784/212784 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 18635 event pairs, 401 based on Foata normal form. 18/2982 useless extension candidates. Maximal degree in co-relation 20669. Up to 1561 conditions per place. [2024-06-14 14:06:01,144 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 131 selfloop transitions, 36 changer transitions 16/189 dead transitions. [2024-06-14 14:06:01,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 189 transitions, 2303 flow [2024-06-14 14:06:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 14:06:01,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 14:06:01,146 INFO L175 Difference]: Start difference. First operand has 190 places, 144 transitions, 1451 flow. Second operand 10 states and 215 transitions. [2024-06-14 14:06:01,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 189 transitions, 2303 flow [2024-06-14 14:06:01,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 189 transitions, 2227 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-14 14:06:01,808 INFO L231 Difference]: Finished difference. Result has 185 places, 141 transitions, 1422 flow [2024-06-14 14:06:01,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1422, PETRI_PLACES=185, PETRI_TRANSITIONS=141} [2024-06-14 14:06:01,808 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-14 14:06:01,809 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 141 transitions, 1422 flow [2024-06-14 14:06:01,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:01,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:01,809 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, 1, 1] [2024-06-14 14:06:01,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 14:06:01,809 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:01,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash -276672786, now seen corresponding path program 21 times [2024-06-14 14:06:01,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:01,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536363931] [2024-06-14 14:06:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:01,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:02,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536363931] [2024-06-14 14:06:02,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536363931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:02,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:02,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:02,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514369908] [2024-06-14 14:06:02,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:02,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:02,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:02,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:02,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:02,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:02,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 141 transitions, 1422 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:02,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:02,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:02,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:02,550 INFO L124 PetriNetUnfolderBase]: 1729/2970 cut-off events. [2024-06-14 14:06:02,551 INFO L125 PetriNetUnfolderBase]: For 234992/234996 co-relation queries the response was YES. [2024-06-14 14:06:02,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21726 conditions, 2970 events. 1729/2970 cut-off events. For 234992/234996 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 18877 event pairs, 471 based on Foata normal form. 22/2990 useless extension candidates. Maximal degree in co-relation 21641. Up to 1561 conditions per place. [2024-06-14 14:06:02,578 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 136 selfloop transitions, 29 changer transitions 8/179 dead transitions. [2024-06-14 14:06:02,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 179 transitions, 2220 flow [2024-06-14 14:06:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 14:06:02,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-14 14:06:02,579 INFO L175 Difference]: Start difference. First operand has 185 places, 141 transitions, 1422 flow. Second operand 9 states and 197 transitions. [2024-06-14 14:06:02,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 179 transitions, 2220 flow [2024-06-14 14:06:03,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 179 transitions, 2143 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:03,195 INFO L231 Difference]: Finished difference. Result has 182 places, 139 transitions, 1395 flow [2024-06-14 14:06:03,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1395, PETRI_PLACES=182, PETRI_TRANSITIONS=139} [2024-06-14 14:06:03,195 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-14 14:06:03,195 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 139 transitions, 1395 flow [2024-06-14 14:06:03,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:03,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:03,196 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, 1, 1] [2024-06-14 14:06:03,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 14:06:03,196 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:03,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:03,196 INFO L85 PathProgramCache]: Analyzing trace with hash -276683016, now seen corresponding path program 22 times [2024-06-14 14:06:03,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:03,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310711513] [2024-06-14 14:06:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:03,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:03,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:03,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310711513] [2024-06-14 14:06:03,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310711513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:03,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:03,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075518744] [2024-06-14 14:06:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:03,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:03,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:03,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:03,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 139 transitions, 1395 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:03,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:03,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:03,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:03,970 INFO L124 PetriNetUnfolderBase]: 1624/2779 cut-off events. [2024-06-14 14:06:03,970 INFO L125 PetriNetUnfolderBase]: For 204847/204851 co-relation queries the response was YES. [2024-06-14 14:06:03,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19939 conditions, 2779 events. 1624/2779 cut-off events. For 204847/204851 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 17349 event pairs, 495 based on Foata normal form. 22/2799 useless extension candidates. Maximal degree in co-relation 19855. Up to 1561 conditions per place. [2024-06-14 14:06:03,992 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 129 selfloop transitions, 27 changer transitions 14/176 dead transitions. [2024-06-14 14:06:03,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 176 transitions, 2061 flow [2024-06-14 14:06:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 14:06:03,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225 [2024-06-14 14:06:03,994 INFO L175 Difference]: Start difference. First operand has 182 places, 139 transitions, 1395 flow. Second operand 10 states and 209 transitions. [2024-06-14 14:06:03,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 176 transitions, 2061 flow [2024-06-14 14:06:04,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 176 transitions, 1992 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:04,442 INFO L231 Difference]: Finished difference. Result has 181 places, 135 transitions, 1352 flow [2024-06-14 14:06:04,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1352, PETRI_PLACES=181, PETRI_TRANSITIONS=135} [2024-06-14 14:06:04,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-14 14:06:04,443 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 135 transitions, 1352 flow [2024-06-14 14:06:04,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:04,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:04,443 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, 1, 1] [2024-06-14 14:06:04,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 14:06:04,443 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:04,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash -696340140, now seen corresponding path program 23 times [2024-06-14 14:06:04,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:04,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596799957] [2024-06-14 14:06:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:04,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:04,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:04,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596799957] [2024-06-14 14:06:04,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596799957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:04,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:04,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:04,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972311877] [2024-06-14 14:06:04,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:04,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:04,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:04,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:04,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:04,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:04,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 135 transitions, 1352 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:04,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:04,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:04,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:05,121 INFO L124 PetriNetUnfolderBase]: 1673/2864 cut-off events. [2024-06-14 14:06:05,121 INFO L125 PetriNetUnfolderBase]: For 226337/226341 co-relation queries the response was YES. [2024-06-14 14:06:05,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21166 conditions, 2864 events. 1673/2864 cut-off events. For 226337/226341 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 17981 event pairs, 782 based on Foata normal form. 18/2880 useless extension candidates. Maximal degree in co-relation 21083. Up to 2079 conditions per place. [2024-06-14 14:06:05,145 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 51 changer transitions 27/171 dead transitions. [2024-06-14 14:06:05,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 171 transitions, 1956 flow [2024-06-14 14:06:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-14 14:06:05,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-14 14:06:05,147 INFO L175 Difference]: Start difference. First operand has 181 places, 135 transitions, 1352 flow. Second operand 11 states and 225 transitions. [2024-06-14 14:06:05,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 171 transitions, 1956 flow [2024-06-14 14:06:05,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 171 transitions, 1892 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:05,574 INFO L231 Difference]: Finished difference. Result has 179 places, 130 transitions, 1343 flow [2024-06-14 14:06:05,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1343, PETRI_PLACES=179, PETRI_TRANSITIONS=130} [2024-06-14 14:06:05,575 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-14 14:06:05,575 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 130 transitions, 1343 flow [2024-06-14 14:06:05,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:05,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:05,576 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, 1, 1] [2024-06-14 14:06:05,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 14:06:05,576 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:05,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:05,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1849459824, now seen corresponding path program 24 times [2024-06-14 14:06:05,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:05,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080868500] [2024-06-14 14:06:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:05,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:05,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:05,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080868500] [2024-06-14 14:06:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080868500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:05,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:05,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:05,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137234257] [2024-06-14 14:06:05,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:05,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:05,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:05,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:05,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:05,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 130 transitions, 1343 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:05,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:05,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:05,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:06,243 INFO L124 PetriNetUnfolderBase]: 1637/2804 cut-off events. [2024-06-14 14:06:06,243 INFO L125 PetriNetUnfolderBase]: For 227182/227182 co-relation queries the response was YES. [2024-06-14 14:06:06,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20904 conditions, 2804 events. 1637/2804 cut-off events. For 227182/227182 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17701 event pairs, 752 based on Foata normal form. 24/2826 useless extension candidates. Maximal degree in co-relation 20822. Up to 2074 conditions per place. [2024-06-14 14:06:06,269 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 51 changer transitions 19/163 dead transitions. [2024-06-14 14:06:06,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 163 transitions, 1953 flow [2024-06-14 14:06:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:06:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:06:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-14 14:06:06,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020833333333333 [2024-06-14 14:06:06,270 INFO L175 Difference]: Start difference. First operand has 179 places, 130 transitions, 1343 flow. Second operand 12 states and 241 transitions. [2024-06-14 14:06:06,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 163 transitions, 1953 flow [2024-06-14 14:06:06,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 163 transitions, 1870 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:06,841 INFO L231 Difference]: Finished difference. Result has 173 places, 126 transitions, 1325 flow [2024-06-14 14:06:06,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1325, PETRI_PLACES=173, PETRI_TRANSITIONS=126} [2024-06-14 14:06:06,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-14 14:06:06,842 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 126 transitions, 1325 flow [2024-06-14 14:06:06,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:06,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:06,842 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, 1, 1] [2024-06-14 14:06:06,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 14:06:06,842 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:06,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash 880588774, now seen corresponding path program 25 times [2024-06-14 14:06:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:06,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077060653] [2024-06-14 14:06:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:07,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:07,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077060653] [2024-06-14 14:06:07,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077060653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:07,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:07,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:07,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837801635] [2024-06-14 14:06:07,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:07,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:07,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:07,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:07,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 126 transitions, 1325 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:07,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:07,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:07,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:07,660 INFO L124 PetriNetUnfolderBase]: 1572/2705 cut-off events. [2024-06-14 14:06:07,660 INFO L125 PetriNetUnfolderBase]: For 200651/200651 co-relation queries the response was YES. [2024-06-14 14:06:07,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19872 conditions, 2705 events. 1572/2705 cut-off events. For 200651/200651 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 17011 event pairs, 795 based on Foata normal form. 26/2729 useless extension candidates. Maximal degree in co-relation 19794. Up to 2308 conditions per place. [2024-06-14 14:06:07,683 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 48 changer transitions 15/147 dead transitions. [2024-06-14 14:06:07,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 147 transitions, 1701 flow [2024-06-14 14:06:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:07,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-14 14:06:07,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-14 14:06:07,685 INFO L175 Difference]: Start difference. First operand has 173 places, 126 transitions, 1325 flow. Second operand 11 states and 213 transitions. [2024-06-14 14:06:07,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 147 transitions, 1701 flow [2024-06-14 14:06:08,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 147 transitions, 1594 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-14 14:06:08,053 INFO L231 Difference]: Finished difference. Result has 169 places, 122 transitions, 1287 flow [2024-06-14 14:06:08,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1287, PETRI_PLACES=169, PETRI_TRANSITIONS=122} [2024-06-14 14:06:08,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-14 14:06:08,053 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 122 transitions, 1287 flow [2024-06-14 14:06:08,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:08,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:08,054 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, 1, 1] [2024-06-14 14:06:08,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 14:06:08,054 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:08,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1209055996, now seen corresponding path program 26 times [2024-06-14 14:06:08,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:08,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827620520] [2024-06-14 14:06:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:08,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:08,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:08,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827620520] [2024-06-14 14:06:08,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827620520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:08,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:08,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:08,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253506863] [2024-06-14 14:06:08,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:08,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:08,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:08,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:08,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:08,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 122 transitions, 1287 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:08,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:08,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:08,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:08,665 INFO L124 PetriNetUnfolderBase]: 1443/2496 cut-off events. [2024-06-14 14:06:08,665 INFO L125 PetriNetUnfolderBase]: For 158178/158178 co-relation queries the response was YES. [2024-06-14 14:06:08,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17484 conditions, 2496 events. 1443/2496 cut-off events. For 158178/158178 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 15484 event pairs, 671 based on Foata normal form. 24/2518 useless extension candidates. Maximal degree in co-relation 17408. Up to 2074 conditions per place. [2024-06-14 14:06:08,685 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 75 selfloop transitions, 44 changer transitions 22/147 dead transitions. [2024-06-14 14:06:08,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 147 transitions, 1701 flow [2024-06-14 14:06:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-14 14:06:08,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-14 14:06:08,686 INFO L175 Difference]: Start difference. First operand has 169 places, 122 transitions, 1287 flow. Second operand 11 states and 214 transitions. [2024-06-14 14:06:08,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 147 transitions, 1701 flow [2024-06-14 14:06:08,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 147 transitions, 1601 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:08,924 INFO L231 Difference]: Finished difference. Result has 167 places, 117 transitions, 1233 flow [2024-06-14 14:06:08,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1233, PETRI_PLACES=167, PETRI_TRANSITIONS=117} [2024-06-14 14:06:08,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-14 14:06:08,925 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 117 transitions, 1233 flow [2024-06-14 14:06:08,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:08,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:08,925 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, 1, 1] [2024-06-14 14:06:08,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 14:06:08,925 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:08,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:08,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1741963538, now seen corresponding path program 27 times [2024-06-14 14:06:08,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:08,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212360062] [2024-06-14 14:06:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:08,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:09,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:09,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212360062] [2024-06-14 14:06:09,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212360062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:09,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:09,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:09,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879814477] [2024-06-14 14:06:09,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:09,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:09,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:09,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:09,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:09,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:09,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 117 transitions, 1233 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:09,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:09,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:09,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:09,549 INFO L124 PetriNetUnfolderBase]: 1470/2551 cut-off events. [2024-06-14 14:06:09,549 INFO L125 PetriNetUnfolderBase]: For 162502/162502 co-relation queries the response was YES. [2024-06-14 14:06:09,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18235 conditions, 2551 events. 1470/2551 cut-off events. For 162502/162502 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15972 event pairs, 625 based on Foata normal form. 18/2567 useless extension candidates. Maximal degree in co-relation 18160. Up to 2003 conditions per place. [2024-06-14 14:06:09,607 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 110 selfloop transitions, 16 changer transitions 8/140 dead transitions. [2024-06-14 14:06:09,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 140 transitions, 1719 flow [2024-06-14 14:06:09,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 14:06:09,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-14 14:06:09,609 INFO L175 Difference]: Start difference. First operand has 167 places, 117 transitions, 1233 flow. Second operand 8 states and 165 transitions. [2024-06-14 14:06:09,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 140 transitions, 1719 flow [2024-06-14 14:06:09,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 140 transitions, 1599 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:09,855 INFO L231 Difference]: Finished difference. Result has 157 places, 115 transitions, 1147 flow [2024-06-14 14:06:09,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1147, PETRI_PLACES=157, PETRI_TRANSITIONS=115} [2024-06-14 14:06:09,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-14 14:06:09,855 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 115 transitions, 1147 flow [2024-06-14 14:06:09,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:09,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:09,855 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, 1, 1] [2024-06-14 14:06:09,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 14:06:09,856 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:09,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:09,856 INFO L85 PathProgramCache]: Analyzing trace with hash 994568090, now seen corresponding path program 28 times [2024-06-14 14:06:09,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:09,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022867170] [2024-06-14 14:06:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:09,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:10,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:10,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022867170] [2024-06-14 14:06:10,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022867170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:10,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:10,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:10,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70492297] [2024-06-14 14:06:10,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:10,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:10,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:10,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:10,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:10,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 115 transitions, 1147 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:10,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:10,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:10,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:10,521 INFO L124 PetriNetUnfolderBase]: 1365/2360 cut-off events. [2024-06-14 14:06:10,521 INFO L125 PetriNetUnfolderBase]: For 127380/127384 co-relation queries the response was YES. [2024-06-14 14:06:10,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15793 conditions, 2360 events. 1365/2360 cut-off events. For 127380/127384 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 14465 event pairs, 605 based on Foata normal form. 22/2380 useless extension candidates. Maximal degree in co-relation 15721. Up to 2003 conditions per place. [2024-06-14 14:06:10,538 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 103 selfloop transitions, 15 changer transitions 13/137 dead transitions. [2024-06-14 14:06:10,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 137 transitions, 1511 flow [2024-06-14 14:06:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 14:06:10,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-14 14:06:10,540 INFO L175 Difference]: Start difference. First operand has 157 places, 115 transitions, 1147 flow. Second operand 9 states and 177 transitions. [2024-06-14 14:06:10,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 137 transitions, 1511 flow [2024-06-14 14:06:10,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 137 transitions, 1456 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:10,780 INFO L231 Difference]: Finished difference. Result has 155 places, 112 transitions, 1098 flow [2024-06-14 14:06:10,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1098, PETRI_PLACES=155, PETRI_TRANSITIONS=112} [2024-06-14 14:06:10,780 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-14 14:06:10,780 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 112 transitions, 1098 flow [2024-06-14 14:06:10,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:10,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:10,781 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, 1, 1] [2024-06-14 14:06:10,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 14:06:10,781 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:10,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:10,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1729999088, now seen corresponding path program 29 times [2024-06-14 14:06:10,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:10,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654721117] [2024-06-14 14:06:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:10,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:11,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:11,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654721117] [2024-06-14 14:06:11,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654721117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:11,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:11,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924408377] [2024-06-14 14:06:11,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:11,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:11,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:11,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:11,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 112 transitions, 1098 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:11,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:11,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:11,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:11,327 INFO L124 PetriNetUnfolderBase]: 1337/2300 cut-off events. [2024-06-14 14:06:11,328 INFO L125 PetriNetUnfolderBase]: For 128083/128087 co-relation queries the response was YES. [2024-06-14 14:06:11,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15431 conditions, 2300 events. 1337/2300 cut-off events. For 128083/128087 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 13985 event pairs, 621 based on Foata normal form. 18/2316 useless extension candidates. Maximal degree in co-relation 15361. Up to 1920 conditions per place. [2024-06-14 14:06:11,346 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 63 selfloop transitions, 41 changer transitions 29/139 dead transitions. [2024-06-14 14:06:11,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 139 transitions, 1474 flow [2024-06-14 14:06:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-14 14:06:11,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-14 14:06:11,347 INFO L175 Difference]: Start difference. First operand has 155 places, 112 transitions, 1098 flow. Second operand 11 states and 214 transitions. [2024-06-14 14:06:11,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 139 transitions, 1474 flow [2024-06-14 14:06:11,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 139 transitions, 1421 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:11,548 INFO L231 Difference]: Finished difference. Result has 153 places, 106 transitions, 1074 flow [2024-06-14 14:06:11,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1074, PETRI_PLACES=153, PETRI_TRANSITIONS=106} [2024-06-14 14:06:11,548 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-14 14:06:11,548 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 106 transitions, 1074 flow [2024-06-14 14:06:11,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:11,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:11,549 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, 1, 1] [2024-06-14 14:06:11,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 14:06:11,549 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:11,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash -863621432, now seen corresponding path program 30 times [2024-06-14 14:06:11,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:11,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738188907] [2024-06-14 14:06:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:11,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:11,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:11,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738188907] [2024-06-14 14:06:11,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738188907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:11,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:11,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:11,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825422019] [2024-06-14 14:06:11,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:11,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:11,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:11,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:11,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:11,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:11,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 106 transitions, 1074 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:11,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:11,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:11,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:12,213 INFO L124 PetriNetUnfolderBase]: 1396/2410 cut-off events. [2024-06-14 14:06:12,213 INFO L125 PetriNetUnfolderBase]: For 139216/139220 co-relation queries the response was YES. [2024-06-14 14:06:12,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16621 conditions, 2410 events. 1396/2410 cut-off events. For 139216/139220 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15133 event pairs, 500 based on Foata normal form. 22/2431 useless extension candidates. Maximal degree in co-relation 16553. Up to 1173 conditions per place. [2024-06-14 14:06:12,229 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 91 selfloop transitions, 27 changer transitions 8/132 dead transitions. [2024-06-14 14:06:12,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 132 transitions, 1661 flow [2024-06-14 14:06:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 14:06:12,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-14 14:06:12,230 INFO L175 Difference]: Start difference. First operand has 153 places, 106 transitions, 1074 flow. Second operand 8 states and 170 transitions. [2024-06-14 14:06:12,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 132 transitions, 1661 flow [2024-06-14 14:06:12,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 132 transitions, 1519 flow, removed 28 selfloop flow, removed 13 redundant places. [2024-06-14 14:06:12,378 INFO L231 Difference]: Finished difference. Result has 139 places, 105 transitions, 1035 flow [2024-06-14 14:06:12,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1035, PETRI_PLACES=139, PETRI_TRANSITIONS=105} [2024-06-14 14:06:12,379 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-14 14:06:12,379 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 105 transitions, 1035 flow [2024-06-14 14:06:12,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:12,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:12,379 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, 1, 1] [2024-06-14 14:06:12,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 14:06:12,380 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:12,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash 169987156, now seen corresponding path program 3 times [2024-06-14 14:06:12,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:12,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447424386] [2024-06-14 14:06:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:12,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:12,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:12,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447424386] [2024-06-14 14:06:12,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447424386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:12,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:12,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:12,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847289248] [2024-06-14 14:06:12,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:12,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:12,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:12,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:12,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:12,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:12,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 105 transitions, 1035 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:12,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:12,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:12,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:12,989 INFO L124 PetriNetUnfolderBase]: 1519/2597 cut-off events. [2024-06-14 14:06:12,989 INFO L125 PetriNetUnfolderBase]: For 135777/135777 co-relation queries the response was YES. [2024-06-14 14:06:13,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17493 conditions, 2597 events. 1519/2597 cut-off events. For 135777/135777 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 16468 event pairs, 773 based on Foata normal form. 24/2620 useless extension candidates. Maximal degree in co-relation 17431. Up to 1870 conditions per place. [2024-06-14 14:06:13,029 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 40 changer transitions 16/131 dead transitions. [2024-06-14 14:06:13,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 131 transitions, 1509 flow [2024-06-14 14:06:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-14 14:06:13,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-14 14:06:13,031 INFO L175 Difference]: Start difference. First operand has 139 places, 105 transitions, 1035 flow. Second operand 11 states and 218 transitions. [2024-06-14 14:06:13,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 131 transitions, 1509 flow [2024-06-14 14:06:13,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 131 transitions, 1457 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:13,237 INFO L231 Difference]: Finished difference. Result has 141 places, 101 transitions, 1019 flow [2024-06-14 14:06:13,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1019, PETRI_PLACES=141, PETRI_TRANSITIONS=101} [2024-06-14 14:06:13,252 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-14 14:06:13,252 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 101 transitions, 1019 flow [2024-06-14 14:06:13,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:13,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:13,253 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, 1, 1] [2024-06-14 14:06:13,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 14:06:13,253 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:13,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:13,253 INFO L85 PathProgramCache]: Analyzing trace with hash -161117016, now seen corresponding path program 4 times [2024-06-14 14:06:13,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:13,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181267981] [2024-06-14 14:06:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:13,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:13,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:13,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181267981] [2024-06-14 14:06:13,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181267981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:13,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:13,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:13,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245987856] [2024-06-14 14:06:13,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:13,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:13,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:13,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:13,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:13,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:13,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 101 transitions, 1019 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:13,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:13,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:13,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:13,898 INFO L124 PetriNetUnfolderBase]: 1467/2505 cut-off events. [2024-06-14 14:06:13,898 INFO L125 PetriNetUnfolderBase]: For 137591/137599 co-relation queries the response was YES. [2024-06-14 14:06:13,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17050 conditions, 2505 events. 1467/2505 cut-off events. For 137591/137599 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 15876 event pairs, 807 based on Foata normal form. 34/2538 useless extension candidates. Maximal degree in co-relation 16989. Up to 2204 conditions per place. [2024-06-14 14:06:13,916 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 77 selfloop transitions, 19 changer transitions 12/114 dead transitions. [2024-06-14 14:06:13,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 114 transitions, 1299 flow [2024-06-14 14:06:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 14:06:13,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-14 14:06:13,917 INFO L175 Difference]: Start difference. First operand has 141 places, 101 transitions, 1019 flow. Second operand 9 states and 173 transitions. [2024-06-14 14:06:13,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 114 transitions, 1299 flow [2024-06-14 14:06:14,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 114 transitions, 1223 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:14,075 INFO L231 Difference]: Finished difference. Result has 136 places, 97 transitions, 949 flow [2024-06-14 14:06:14,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=949, PETRI_PLACES=136, PETRI_TRANSITIONS=97} [2024-06-14 14:06:14,076 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-14 14:06:14,076 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 97 transitions, 949 flow [2024-06-14 14:06:14,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:14,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:14,076 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, 1, 1] [2024-06-14 14:06:14,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 14:06:14,076 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:14,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:14,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1568318286, now seen corresponding path program 5 times [2024-06-14 14:06:14,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:14,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63815381] [2024-06-14 14:06:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:14,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:14,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63815381] [2024-06-14 14:06:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63815381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:14,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:14,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:14,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109109868] [2024-06-14 14:06:14,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:14,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:14,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:14,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:14,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 97 transitions, 949 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:14,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:14,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:14,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:14,700 INFO L124 PetriNetUnfolderBase]: 1566/2684 cut-off events. [2024-06-14 14:06:14,701 INFO L125 PetriNetUnfolderBase]: For 134574/134574 co-relation queries the response was YES. [2024-06-14 14:06:14,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18126 conditions, 2684 events. 1566/2684 cut-off events. For 134574/134574 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 17269 event pairs, 848 based on Foata normal form. 24/2707 useless extension candidates. Maximal degree in co-relation 18067. Up to 2104 conditions per place. [2024-06-14 14:06:14,718 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 34 changer transitions 10/117 dead transitions. [2024-06-14 14:06:14,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 117 transitions, 1355 flow [2024-06-14 14:06:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 14:06:14,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-14 14:06:14,719 INFO L175 Difference]: Start difference. First operand has 136 places, 97 transitions, 949 flow. Second operand 9 states and 183 transitions. [2024-06-14 14:06:14,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 117 transitions, 1355 flow [2024-06-14 14:06:14,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 117 transitions, 1309 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:14,871 INFO L231 Difference]: Finished difference. Result has 134 places, 94 transitions, 936 flow [2024-06-14 14:06:14,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=936, PETRI_PLACES=134, PETRI_TRANSITIONS=94} [2024-06-14 14:06:14,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-14 14:06:14,876 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 94 transitions, 936 flow [2024-06-14 14:06:14,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:14,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:14,877 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, 1, 1] [2024-06-14 14:06:14,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 14:06:14,877 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:14,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash -581108208, now seen corresponding path program 6 times [2024-06-14 14:06:14,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:14,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754809226] [2024-06-14 14:06:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:14,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:15,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:15,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754809226] [2024-06-14 14:06:15,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754809226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:15,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:15,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:15,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788366484] [2024-06-14 14:06:15,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:15,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:15,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:15,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:15,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:15,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:15,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 94 transitions, 936 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:15,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:15,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:15,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:15,532 INFO L124 PetriNetUnfolderBase]: 1415/2427 cut-off events. [2024-06-14 14:06:15,533 INFO L125 PetriNetUnfolderBase]: For 114999/115003 co-relation queries the response was YES. [2024-06-14 14:06:15,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16015 conditions, 2427 events. 1415/2427 cut-off events. For 114999/115003 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 15253 event pairs, 802 based on Foata normal form. 30/2456 useless extension candidates. Maximal degree in co-relation 15957. Up to 2131 conditions per place. [2024-06-14 14:06:15,551 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 73 selfloop transitions, 14 changer transitions 12/105 dead transitions. [2024-06-14 14:06:15,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 105 transitions, 1194 flow [2024-06-14 14:06:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 14:06:15,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:06:15,552 INFO L175 Difference]: Start difference. First operand has 134 places, 94 transitions, 936 flow. Second operand 7 states and 140 transitions. [2024-06-14 14:06:15,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 105 transitions, 1194 flow [2024-06-14 14:06:15,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 105 transitions, 1125 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:15,738 INFO L231 Difference]: Finished difference. Result has 131 places, 90 transitions, 861 flow [2024-06-14 14:06:15,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=861, PETRI_PLACES=131, PETRI_TRANSITIONS=90} [2024-06-14 14:06:15,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-14 14:06:15,738 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 90 transitions, 861 flow [2024-06-14 14:06:15,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:15,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:15,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:15,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 14:06:15,739 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:15,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1598483702, now seen corresponding path program 7 times [2024-06-14 14:06:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:15,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713608023] [2024-06-14 14:06:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:15,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:15,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:15,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713608023] [2024-06-14 14:06:15,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713608023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:15,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:15,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:15,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915182807] [2024-06-14 14:06:15,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:15,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:15,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:15,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:15,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:16,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:16,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 90 transitions, 861 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:16,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:16,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:16,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:16,333 INFO L124 PetriNetUnfolderBase]: 1461/2531 cut-off events. [2024-06-14 14:06:16,334 INFO L125 PetriNetUnfolderBase]: For 110522/110522 co-relation queries the response was YES. [2024-06-14 14:06:16,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16612 conditions, 2531 events. 1461/2531 cut-off events. For 110522/110522 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16127 event pairs, 772 based on Foata normal form. 18/2548 useless extension candidates. Maximal degree in co-relation 16555. Up to 1502 conditions per place. [2024-06-14 14:06:16,351 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 34 changer transitions 8/117 dead transitions. [2024-06-14 14:06:16,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 117 transitions, 1355 flow [2024-06-14 14:06:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:16,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-14 14:06:16,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-14 14:06:16,353 INFO L175 Difference]: Start difference. First operand has 131 places, 90 transitions, 861 flow. Second operand 11 states and 216 transitions. [2024-06-14 14:06:16,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 117 transitions, 1355 flow [2024-06-14 14:06:16,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 117 transitions, 1315 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:16,508 INFO L231 Difference]: Finished difference. Result has 133 places, 88 transitions, 877 flow [2024-06-14 14:06:16,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=877, PETRI_PLACES=133, PETRI_TRANSITIONS=88} [2024-06-14 14:06:16,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-14 14:06:16,509 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 88 transitions, 877 flow [2024-06-14 14:06:16,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:16,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:16,509 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, 1, 1] [2024-06-14 14:06:16,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 14:06:16,509 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:16,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:16,510 INFO L85 PathProgramCache]: Analyzing trace with hash -858852950, now seen corresponding path program 8 times [2024-06-14 14:06:16,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:16,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756317456] [2024-06-14 14:06:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:16,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:16,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:16,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756317456] [2024-06-14 14:06:16,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756317456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:16,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:16,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:16,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123728511] [2024-06-14 14:06:16,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:16,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:16,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:16,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:16,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:16,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:16,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 88 transitions, 877 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:16,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:16,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:16,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:17,187 INFO L124 PetriNetUnfolderBase]: 1343/2333 cut-off events. [2024-06-14 14:06:17,188 INFO L125 PetriNetUnfolderBase]: For 96151/96155 co-relation queries the response was YES. [2024-06-14 14:06:17,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14965 conditions, 2333 events. 1343/2333 cut-off events. For 96151/96155 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 14684 event pairs, 725 based on Foata normal form. 28/2360 useless extension candidates. Maximal degree in co-relation 14909. Up to 1964 conditions per place. [2024-06-14 14:06:17,203 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 74 selfloop transitions, 12 changer transitions 11/103 dead transitions. [2024-06-14 14:06:17,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 103 transitions, 1163 flow [2024-06-14 14:06:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 14:06:17,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-14 14:06:17,204 INFO L175 Difference]: Start difference. First operand has 133 places, 88 transitions, 877 flow. Second operand 7 states and 142 transitions. [2024-06-14 14:06:17,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 103 transitions, 1163 flow [2024-06-14 14:06:17,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 103 transitions, 1092 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:17,317 INFO L231 Difference]: Finished difference. Result has 128 places, 84 transitions, 783 flow [2024-06-14 14:06:17,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=783, PETRI_PLACES=128, PETRI_TRANSITIONS=84} [2024-06-14 14:06:17,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-14 14:06:17,318 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 84 transitions, 783 flow [2024-06-14 14:06:17,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:17,318 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, 1, 1] [2024-06-14 14:06:17,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 14:06:17,318 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:17,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:17,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1368790442, now seen corresponding path program 9 times [2024-06-14 14:06:17,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:17,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90305326] [2024-06-14 14:06:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:17,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:17,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:17,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90305326] [2024-06-14 14:06:17,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90305326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:17,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:17,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:17,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031244116] [2024-06-14 14:06:17,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:17,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:17,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:17,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:17,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:17,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:17,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 84 transitions, 783 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:17,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:17,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:17,877 INFO L124 PetriNetUnfolderBase]: 1209/2089 cut-off events. [2024-06-14 14:06:17,877 INFO L125 PetriNetUnfolderBase]: For 81170/81170 co-relation queries the response was YES. [2024-06-14 14:06:17,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13248 conditions, 2089 events. 1209/2089 cut-off events. For 81170/81170 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 12860 event pairs, 662 based on Foata normal form. 18/2106 useless extension candidates. Maximal degree in co-relation 13193. Up to 1825 conditions per place. [2024-06-14 14:06:17,891 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 71 selfloop transitions, 7 changer transitions 15/99 dead transitions. [2024-06-14 14:06:17,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 99 transitions, 1039 flow [2024-06-14 14:06:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 14:06:17,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-14 14:06:17,892 INFO L175 Difference]: Start difference. First operand has 128 places, 84 transitions, 783 flow. Second operand 8 states and 152 transitions. [2024-06-14 14:06:17,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 99 transitions, 1039 flow [2024-06-14 14:06:17,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 99 transitions, 998 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:17,977 INFO L231 Difference]: Finished difference. Result has 126 places, 81 transitions, 720 flow [2024-06-14 14:06:17,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=720, PETRI_PLACES=126, PETRI_TRANSITIONS=81} [2024-06-14 14:06:17,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-14 14:06:17,978 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 81 transitions, 720 flow [2024-06-14 14:06:17,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:17,978 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, 1, 1] [2024-06-14 14:06:17,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 14:06:17,979 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:17,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:17,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1968173646, now seen corresponding path program 10 times [2024-06-14 14:06:17,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:17,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484987896] [2024-06-14 14:06:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:17,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:18,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:18,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484987896] [2024-06-14 14:06:18,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484987896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:18,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:18,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:18,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11247782] [2024-06-14 14:06:18,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:18,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:18,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:18,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:18,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:18,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:18,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 81 transitions, 720 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:18,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:18,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:18,493 INFO L124 PetriNetUnfolderBase]: 1084/1870 cut-off events. [2024-06-14 14:06:18,493 INFO L125 PetriNetUnfolderBase]: For 72429/72433 co-relation queries the response was YES. [2024-06-14 14:06:18,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11563 conditions, 1870 events. 1084/1870 cut-off events. For 72429/72433 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11136 event pairs, 622 based on Foata normal form. 30/1899 useless extension candidates. Maximal degree in co-relation 11509. Up to 1581 conditions per place. [2024-06-14 14:06:18,504 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 51 selfloop transitions, 23 changer transitions 14/94 dead transitions. [2024-06-14 14:06:18,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 94 transitions, 960 flow [2024-06-14 14:06:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 14:06:18,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-14 14:06:18,505 INFO L175 Difference]: Start difference. First operand has 126 places, 81 transitions, 720 flow. Second operand 9 states and 172 transitions. [2024-06-14 14:06:18,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 94 transitions, 960 flow [2024-06-14 14:06:18,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 94 transitions, 930 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:18,584 INFO L231 Difference]: Finished difference. Result has 122 places, 76 transitions, 700 flow [2024-06-14 14:06:18,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=700, PETRI_PLACES=122, PETRI_TRANSITIONS=76} [2024-06-14 14:06:18,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-14 14:06:18,585 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 76 transitions, 700 flow [2024-06-14 14:06:18,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:18,585 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, 1, 1] [2024-06-14 14:06:18,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 14:06:18,586 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:18,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:18,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1002175292, now seen corresponding path program 11 times [2024-06-14 14:06:18,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:18,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24695076] [2024-06-14 14:06:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:18,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:18,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:18,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24695076] [2024-06-14 14:06:18,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24695076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:18,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:18,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:18,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318021405] [2024-06-14 14:06:18,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:18,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:18,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:18,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:18,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:18,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 76 transitions, 700 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:18,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:18,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:19,104 INFO L124 PetriNetUnfolderBase]: 1076/1872 cut-off events. [2024-06-14 14:06:19,104 INFO L125 PetriNetUnfolderBase]: For 66929/66933 co-relation queries the response was YES. [2024-06-14 14:06:19,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11375 conditions, 1872 events. 1076/1872 cut-off events. For 66929/66933 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11221 event pairs, 633 based on Foata normal form. 30/1901 useless extension candidates. Maximal degree in co-relation 11323. Up to 1575 conditions per place. [2024-06-14 14:06:19,116 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 51 selfloop transitions, 22 changer transitions 12/91 dead transitions. [2024-06-14 14:06:19,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 91 transitions, 938 flow [2024-06-14 14:06:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-14 14:06:19,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-14 14:06:19,118 INFO L175 Difference]: Start difference. First operand has 122 places, 76 transitions, 700 flow. Second operand 11 states and 206 transitions. [2024-06-14 14:06:19,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 91 transitions, 938 flow [2024-06-14 14:06:19,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 91 transitions, 886 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:19,186 INFO L231 Difference]: Finished difference. Result has 119 places, 72 transitions, 664 flow [2024-06-14 14:06:19,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=664, PETRI_PLACES=119, PETRI_TRANSITIONS=72} [2024-06-14 14:06:19,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-14 14:06:19,194 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 72 transitions, 664 flow [2024-06-14 14:06:19,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:19,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:19,194 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, 1, 1] [2024-06-14 14:06:19,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 14:06:19,194 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:19,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1562968506, now seen corresponding path program 12 times [2024-06-14 14:06:19,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:19,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395232795] [2024-06-14 14:06:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:19,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:19,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:19,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395232795] [2024-06-14 14:06:19,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395232795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:19,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:19,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:19,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504012209] [2024-06-14 14:06:19,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:19,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:19,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:19,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:19,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:19,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:19,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 72 transitions, 664 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:19,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:19,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:19,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:19,792 INFO L124 PetriNetUnfolderBase]: 1175/2051 cut-off events. [2024-06-14 14:06:19,792 INFO L125 PetriNetUnfolderBase]: For 65870/65870 co-relation queries the response was YES. [2024-06-14 14:06:19,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12411 conditions, 2051 events. 1175/2051 cut-off events. For 65870/65870 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12634 event pairs, 673 based on Foata normal form. 24/2074 useless extension candidates. Maximal degree in co-relation 12361. Up to 1502 conditions per place. [2024-06-14 14:06:19,805 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 58 selfloop transitions, 20 changer transitions 10/94 dead transitions. [2024-06-14 14:06:19,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 94 transitions, 1014 flow [2024-06-14 14:06:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-14 14:06:19,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 14:06:19,806 INFO L175 Difference]: Start difference. First operand has 119 places, 72 transitions, 664 flow. Second operand 11 states and 210 transitions. [2024-06-14 14:06:19,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 94 transitions, 1014 flow [2024-06-14 14:06:19,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 94 transitions, 962 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:19,865 INFO L231 Difference]: Finished difference. Result has 117 places, 69 transitions, 621 flow [2024-06-14 14:06:19,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=621, PETRI_PLACES=117, PETRI_TRANSITIONS=69} [2024-06-14 14:06:19,865 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-14 14:06:19,865 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 69 transitions, 621 flow [2024-06-14 14:06:19,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:19,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:19,866 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, 1, 1] [2024-06-14 14:06:19,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 14:06:19,866 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:19,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1563326556, now seen corresponding path program 13 times [2024-06-14 14:06:19,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:19,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052436082] [2024-06-14 14:06:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:19,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:20,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:20,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052436082] [2024-06-14 14:06:20,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052436082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:20,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:20,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:20,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482963136] [2024-06-14 14:06:20,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:20,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:20,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:20,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:20,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:20,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 69 transitions, 621 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:20,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:20,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:20,347 INFO L124 PetriNetUnfolderBase]: 1024/1794 cut-off events. [2024-06-14 14:06:20,347 INFO L125 PetriNetUnfolderBase]: For 53755/53759 co-relation queries the response was YES. [2024-06-14 14:06:20,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10516 conditions, 1794 events. 1024/1794 cut-off events. For 53755/53759 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10664 event pairs, 628 based on Foata normal form. 30/1823 useless extension candidates. Maximal degree in co-relation 10467. Up to 1502 conditions per place. [2024-06-14 14:06:20,357 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 48 selfloop transitions, 15 changer transitions 15/84 dead transitions. [2024-06-14 14:06:20,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 84 transitions, 845 flow [2024-06-14 14:06:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-14 14:06:20,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-14 14:06:20,358 INFO L175 Difference]: Start difference. First operand has 117 places, 69 transitions, 621 flow. Second operand 11 states and 202 transitions. [2024-06-14 14:06:20,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 84 transitions, 845 flow [2024-06-14 14:06:20,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 84 transitions, 804 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:20,404 INFO L231 Difference]: Finished difference. Result has 116 places, 63 transitions, 565 flow [2024-06-14 14:06:20,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=565, PETRI_PLACES=116, PETRI_TRANSITIONS=63} [2024-06-14 14:06:20,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-14 14:06:20,404 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 63 transitions, 565 flow [2024-06-14 14:06:20,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:20,405 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, 1, 1] [2024-06-14 14:06:20,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 14:06:20,405 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:20,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:20,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1362308342, now seen corresponding path program 14 times [2024-06-14 14:06:20,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:20,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255681425] [2024-06-14 14:06:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:20,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:20,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:20,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255681425] [2024-06-14 14:06:20,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255681425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:20,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:20,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:20,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803930828] [2024-06-14 14:06:20,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:20,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:20,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:20,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:20,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:20,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 63 transitions, 565 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:20,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:20,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:20,898 INFO L124 PetriNetUnfolderBase]: 893/1577 cut-off events. [2024-06-14 14:06:20,898 INFO L125 PetriNetUnfolderBase]: For 41413/41417 co-relation queries the response was YES. [2024-06-14 14:06:20,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8873 conditions, 1577 events. 893/1577 cut-off events. For 41413/41417 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9142 event pairs, 504 based on Foata normal form. 28/1604 useless extension candidates. Maximal degree in co-relation 8825. Up to 1268 conditions per place. [2024-06-14 14:06:20,907 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 45 selfloop transitions, 11 changer transitions 19/81 dead transitions. [2024-06-14 14:06:20,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 81 transitions, 813 flow [2024-06-14 14:06:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 14:06:20,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-06-14 14:06:20,908 INFO L175 Difference]: Start difference. First operand has 116 places, 63 transitions, 565 flow. Second operand 10 states and 187 transitions. [2024-06-14 14:06:20,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 81 transitions, 813 flow [2024-06-14 14:06:20,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 81 transitions, 775 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-14 14:06:20,944 INFO L231 Difference]: Finished difference. Result has 108 places, 58 transitions, 500 flow [2024-06-14 14:06:20,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=500, PETRI_PLACES=108, PETRI_TRANSITIONS=58} [2024-06-14 14:06:20,944 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-14 14:06:20,944 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 58 transitions, 500 flow [2024-06-14 14:06:20,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:20,945 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, 1, 1] [2024-06-14 14:06:20,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 14:06:20,945 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:20,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash -645563146, now seen corresponding path program 15 times [2024-06-14 14:06:20,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:20,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643942162] [2024-06-14 14:06:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:20,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:21,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:21,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643942162] [2024-06-14 14:06:21,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643942162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:21,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:21,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:21,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504169267] [2024-06-14 14:06:21,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:21,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:21,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:21,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:21,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:21,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 58 transitions, 500 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:21,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:21,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:21,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:21,542 INFO L124 PetriNetUnfolderBase]: 1001/1771 cut-off events. [2024-06-14 14:06:21,543 INFO L125 PetriNetUnfolderBase]: For 40735/40739 co-relation queries the response was YES. [2024-06-14 14:06:21,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9926 conditions, 1771 events. 1001/1771 cut-off events. For 40735/40739 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10720 event pairs, 408 based on Foata normal form. 22/1792 useless extension candidates. Maximal degree in co-relation 9881. Up to 836 conditions per place. [2024-06-14 14:06:21,551 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 59 selfloop transitions, 15 changer transitions 8/88 dead transitions. [2024-06-14 14:06:21,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 88 transitions, 926 flow [2024-06-14 14:06:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 14:06:21,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-14 14:06:21,552 INFO L175 Difference]: Start difference. First operand has 108 places, 58 transitions, 500 flow. Second operand 10 states and 198 transitions. [2024-06-14 14:06:21,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 88 transitions, 926 flow [2024-06-14 14:06:21,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 88 transitions, 863 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:21,587 INFO L231 Difference]: Finished difference. Result has 101 places, 56 transitions, 472 flow [2024-06-14 14:06:21,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=472, PETRI_PLACES=101, PETRI_TRANSITIONS=56} [2024-06-14 14:06:21,588 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-14 14:06:21,588 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 56 transitions, 472 flow [2024-06-14 14:06:21,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:21,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:21,588 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, 1, 1] [2024-06-14 14:06:21,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 14:06:21,589 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:21,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1554508716, now seen corresponding path program 16 times [2024-06-14 14:06:21,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:21,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441547592] [2024-06-14 14:06:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:21,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:21,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:21,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441547592] [2024-06-14 14:06:21,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441547592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:21,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:21,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:21,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128543387] [2024-06-14 14:06:21,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:21,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:21,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:21,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:21,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:21,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 56 transitions, 472 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:21,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:21,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:21,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:22,094 INFO L124 PetriNetUnfolderBase]: 883/1569 cut-off events. [2024-06-14 14:06:22,094 INFO L125 PetriNetUnfolderBase]: For 30211/30215 co-relation queries the response was YES. [2024-06-14 14:06:22,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8192 conditions, 1569 events. 883/1569 cut-off events. For 30211/30215 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9174 event pairs, 541 based on Foata normal form. 28/1596 useless extension candidates. Maximal degree in co-relation 8149. Up to 1224 conditions per place. [2024-06-14 14:06:22,102 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 40 selfloop transitions, 7 changer transitions 23/76 dead transitions. [2024-06-14 14:06:22,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 76 transitions, 730 flow [2024-06-14 14:06:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 14:06:22,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:06:22,103 INFO L175 Difference]: Start difference. First operand has 101 places, 56 transitions, 472 flow. Second operand 8 states and 160 transitions. [2024-06-14 14:06:22,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 76 transitions, 730 flow [2024-06-14 14:06:22,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 76 transitions, 697 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:22,125 INFO L231 Difference]: Finished difference. Result has 98 places, 51 transitions, 394 flow [2024-06-14 14:06:22,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=98, PETRI_TRANSITIONS=51} [2024-06-14 14:06:22,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-14 14:06:22,126 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 51 transitions, 394 flow [2024-06-14 14:06:22,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:22,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:22,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 14:06:22,126 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:22,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash -645567796, now seen corresponding path program 17 times [2024-06-14 14:06:22,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:22,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777289350] [2024-06-14 14:06:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:22,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:22,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:22,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777289350] [2024-06-14 14:06:22,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777289350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:22,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:22,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:22,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025524062] [2024-06-14 14:06:22,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:22,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:22,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:22,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:22,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 51 transitions, 394 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:22,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:22,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:22,666 INFO L124 PetriNetUnfolderBase]: 721/1293 cut-off events. [2024-06-14 14:06:22,666 INFO L125 PetriNetUnfolderBase]: For 22507/22507 co-relation queries the response was YES. [2024-06-14 14:06:22,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6567 conditions, 1293 events. 721/1293 cut-off events. For 22507/22507 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7261 event pairs, 414 based on Foata normal form. 18/1310 useless extension candidates. Maximal degree in co-relation 6525. Up to 1048 conditions per place. [2024-06-14 14:06:22,673 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 41 selfloop transitions, 5 changer transitions 15/67 dead transitions. [2024-06-14 14:06:22,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 67 transitions, 584 flow [2024-06-14 14:06:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 14:06:22,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-14 14:06:22,674 INFO L175 Difference]: Start difference. First operand has 98 places, 51 transitions, 394 flow. Second operand 8 states and 150 transitions. [2024-06-14 14:06:22,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 67 transitions, 584 flow [2024-06-14 14:06:22,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 67 transitions, 549 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:22,688 INFO L231 Difference]: Finished difference. Result has 91 places, 48 transitions, 348 flow [2024-06-14 14:06:22,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=348, PETRI_PLACES=91, PETRI_TRANSITIONS=48} [2024-06-14 14:06:22,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-14 14:06:22,689 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 48 transitions, 348 flow [2024-06-14 14:06:22,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:22,689 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, 1, 1] [2024-06-14 14:06:22,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 14:06:22,689 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:22,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:22,690 INFO L85 PathProgramCache]: Analyzing trace with hash -580277318, now seen corresponding path program 31 times [2024-06-14 14:06:22,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:22,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046008344] [2024-06-14 14:06:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:22,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:22,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046008344] [2024-06-14 14:06:22,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046008344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:22,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:22,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:22,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690808121] [2024-06-14 14:06:22,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:22,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:22,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:22,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:22,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 48 transitions, 348 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:22,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:22,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:23,115 INFO L124 PetriNetUnfolderBase]: 612/1102 cut-off events. [2024-06-14 14:06:23,115 INFO L125 PetriNetUnfolderBase]: For 14323/14323 co-relation queries the response was YES. [2024-06-14 14:06:23,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5257 conditions, 1102 events. 612/1102 cut-off events. For 14323/14323 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6014 event pairs, 272 based on Foata normal form. 18/1119 useless extension candidates. Maximal degree in co-relation 5219. Up to 607 conditions per place. [2024-06-14 14:06:23,120 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 41 selfloop transitions, 8 changer transitions 13/68 dead transitions. [2024-06-14 14:06:23,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 68 transitions, 612 flow [2024-06-14 14:06:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 14:06:23,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-14 14:06:23,121 INFO L175 Difference]: Start difference. First operand has 91 places, 48 transitions, 348 flow. Second operand 7 states and 145 transitions. [2024-06-14 14:06:23,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 68 transitions, 612 flow [2024-06-14 14:06:23,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 68 transitions, 588 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:23,130 INFO L231 Difference]: Finished difference. Result has 84 places, 45 transitions, 314 flow [2024-06-14 14:06:23,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=84, PETRI_TRANSITIONS=45} [2024-06-14 14:06:23,131 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-14 14:06:23,131 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 45 transitions, 314 flow [2024-06-14 14:06:23,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:23,131 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, 1, 1] [2024-06-14 14:06:23,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 14:06:23,132 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:23,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:23,132 INFO L85 PathProgramCache]: Analyzing trace with hash -869195852, now seen corresponding path program 32 times [2024-06-14 14:06:23,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:23,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853689126] [2024-06-14 14:06:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:23,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:23,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:23,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853689126] [2024-06-14 14:06:23,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853689126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:23,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:23,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:23,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443332753] [2024-06-14 14:06:23,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:23,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:23,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:23,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:23,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 45 transitions, 314 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:23,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:23,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:23,549 INFO L124 PetriNetUnfolderBase]: 492/900 cut-off events. [2024-06-14 14:06:23,549 INFO L125 PetriNetUnfolderBase]: For 10407/10407 co-relation queries the response was YES. [2024-06-14 14:06:23,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4051 conditions, 900 events. 492/900 cut-off events. For 10407/10407 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4652 event pairs, 284 based on Foata normal form. 24/923 useless extension candidates. Maximal degree in co-relation 4015. Up to 637 conditions per place. [2024-06-14 14:06:23,553 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 18/60 dead transitions. [2024-06-14 14:06:23,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 60 transitions, 510 flow [2024-06-14 14:06:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 14:06:23,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-06-14 14:06:23,554 INFO L175 Difference]: Start difference. First operand has 84 places, 45 transitions, 314 flow. Second operand 7 states and 138 transitions. [2024-06-14 14:06:23,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 60 transitions, 510 flow [2024-06-14 14:06:23,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 60 transitions, 466 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:23,561 INFO L231 Difference]: Finished difference. Result has 79 places, 40 transitions, 240 flow [2024-06-14 14:06:23,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=79, PETRI_TRANSITIONS=40} [2024-06-14 14:06:23,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-14 14:06:23,561 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 40 transitions, 240 flow [2024-06-14 14:06:23,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:23,562 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, 1, 1] [2024-06-14 14:06:23,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 14:06:23,562 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:23,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:23,562 INFO L85 PathProgramCache]: Analyzing trace with hash -468431626, now seen corresponding path program 18 times [2024-06-14 14:06:23,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:23,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351422830] [2024-06-14 14:06:23,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:23,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:23,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351422830] [2024-06-14 14:06:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351422830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:23,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:23,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:23,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922400193] [2024-06-14 14:06:23,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:23,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:23,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:23,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:23,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:23,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:23,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 40 transitions, 240 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:23,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:23,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:23,985 INFO L124 PetriNetUnfolderBase]: 357/653 cut-off events. [2024-06-14 14:06:23,985 INFO L125 PetriNetUnfolderBase]: For 7327/7327 co-relation queries the response was YES. [2024-06-14 14:06:23,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2778 conditions, 653 events. 357/653 cut-off events. For 7327/7327 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3042 event pairs, 185 based on Foata normal form. 18/670 useless extension candidates. Maximal degree in co-relation 2743. Up to 425 conditions per place. [2024-06-14 14:06:23,987 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 27 selfloop transitions, 3 changer transitions 22/58 dead transitions. [2024-06-14 14:06:23,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 58 transitions, 416 flow [2024-06-14 14:06:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 14:06:23,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 14:06:23,988 INFO L175 Difference]: Start difference. First operand has 79 places, 40 transitions, 240 flow. Second operand 9 states and 165 transitions. [2024-06-14 14:06:23,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 58 transitions, 416 flow [2024-06-14 14:06:23,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 402 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:23,992 INFO L231 Difference]: Finished difference. Result has 75 places, 34 transitions, 184 flow [2024-06-14 14:06:23,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=34} [2024-06-14 14:06:23,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-14 14:06:23,993 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 34 transitions, 184 flow [2024-06-14 14:06:23,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:23,993 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, 1, 1] [2024-06-14 14:06:23,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 14:06:23,994 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:23,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1848765520, now seen corresponding path program 33 times [2024-06-14 14:06:23,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:23,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003138692] [2024-06-14 14:06:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:23,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:24,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:24,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003138692] [2024-06-14 14:06:24,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003138692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:24,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:24,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:24,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823769898] [2024-06-14 14:06:24,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:24,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:24,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:24,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:24,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:24,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:24,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 34 transitions, 184 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:24,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:24,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:24,434 INFO L124 PetriNetUnfolderBase]: 310/574 cut-off events. [2024-06-14 14:06:24,434 INFO L125 PetriNetUnfolderBase]: For 5570/5570 co-relation queries the response was YES. [2024-06-14 14:06:24,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 574 events. 310/574 cut-off events. For 5570/5570 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2719 event pairs, 69 based on Foata normal form. 18/591 useless extension candidates. Maximal degree in co-relation 2369. Up to 204 conditions per place. [2024-06-14 14:06:24,437 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 6 changer transitions 8/55 dead transitions. [2024-06-14 14:06:24,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 55 transitions, 406 flow [2024-06-14 14:06:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 14:06:24,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-14 14:06:24,438 INFO L175 Difference]: Start difference. First operand has 75 places, 34 transitions, 184 flow. Second operand 8 states and 153 transitions. [2024-06-14 14:06:24,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 55 transitions, 406 flow [2024-06-14 14:06:24,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 358 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-14 14:06:24,441 INFO L231 Difference]: Finished difference. Result has 63 places, 32 transitions, 159 flow [2024-06-14 14:06:24,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=159, PETRI_PLACES=63, PETRI_TRANSITIONS=32} [2024-06-14 14:06:24,441 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-06-14 14:06:24,441 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 32 transitions, 159 flow [2024-06-14 14:06:24,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:24,442 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, 1, 1] [2024-06-14 14:06:24,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 14:06:24,442 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:24,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:24,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1848775750, now seen corresponding path program 34 times [2024-06-14 14:06:24,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:24,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589128967] [2024-06-14 14:06:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:24,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:24,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:24,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589128967] [2024-06-14 14:06:24,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589128967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:24,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:24,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:24,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159938629] [2024-06-14 14:06:24,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:24,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:24,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:24,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:24,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:24,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:24,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 32 transitions, 159 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:24,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:24,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:24,913 INFO L124 PetriNetUnfolderBase]: 205/387 cut-off events. [2024-06-14 14:06:24,913 INFO L125 PetriNetUnfolderBase]: For 2143/2167 co-relation queries the response was YES. [2024-06-14 14:06:24,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 387 events. 205/387 cut-off events. For 2143/2167 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1598 event pairs, 57 based on Foata normal form. 18/404 useless extension candidates. Maximal degree in co-relation 1387. Up to 204 conditions per place. [2024-06-14 14:06:24,914 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 23 selfloop transitions, 4 changer transitions 15/48 dead transitions. [2024-06-14 14:06:24,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 48 transitions, 303 flow [2024-06-14 14:06:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 14:06:24,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-14 14:06:24,915 INFO L175 Difference]: Start difference. First operand has 63 places, 32 transitions, 159 flow. Second operand 8 states and 147 transitions. [2024-06-14 14:06:24,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 48 transitions, 303 flow [2024-06-14 14:06:24,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 48 transitions, 288 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:24,917 INFO L231 Difference]: Finished difference. Result has 62 places, 29 transitions, 135 flow [2024-06-14 14:06:24,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=135, PETRI_PLACES=62, PETRI_TRANSITIONS=29} [2024-06-14 14:06:24,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-14 14:06:24,917 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 29 transitions, 135 flow [2024-06-14 14:06:24,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:24,918 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, 1, 1] [2024-06-14 14:06:24,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 14:06:24,918 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:24,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1842052622, now seen corresponding path program 35 times [2024-06-14 14:06:24,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:24,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533320492] [2024-06-14 14:06:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:25,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:25,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533320492] [2024-06-14 14:06:25,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533320492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:25,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:25,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:25,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885806711] [2024-06-14 14:06:25,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:25,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:25,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:25,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:25,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:25,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:25,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 29 transitions, 135 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:25,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:25,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:25,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:25,330 INFO L124 PetriNetUnfolderBase]: 96/196 cut-off events. [2024-06-14 14:06:25,330 INFO L125 PetriNetUnfolderBase]: For 863/863 co-relation queries the response was YES. [2024-06-14 14:06:25,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 196 events. 96/196 cut-off events. For 863/863 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 591 event pairs, 1 based on Foata normal form. 18/213 useless extension candidates. Maximal degree in co-relation 600. Up to 96 conditions per place. [2024-06-14 14:06:25,331 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2024-06-14 14:06:25,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 40 transitions, 225 flow [2024-06-14 14:06:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 14:06:25,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-14 14:06:25,332 INFO L175 Difference]: Start difference. First operand has 62 places, 29 transitions, 135 flow. Second operand 8 states and 139 transitions. [2024-06-14 14:06:25,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 40 transitions, 225 flow [2024-06-14 14:06:25,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 40 transitions, 191 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-14 14:06:25,333 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2024-06-14 14:06:25,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2024-06-14 14:06:25,333 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-14 14:06:25,333 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2024-06-14 14:06:25,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:25,335 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-14 14:06:25,336 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-14 14:06:25,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-14 14:06:25,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-14 14:06:25,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-14 14:06:25,340 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-14 14:06:25,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 14:06:25,340 INFO L445 BasicCegarLoop]: Path program histogram: [35, 21, 18, 13, 9, 8, 8, 6, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:25,342 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-14 14:06:25,342 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-14 14:06:25,346 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-14 14:06:25,346 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-14 14:06:25,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 02:06:25 BasicIcfg [2024-06-14 14:06:25,348 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-14 14:06:25,348 INFO L158 Benchmark]: Toolchain (without parser) took 149770.62ms. Allocated memory was 180.4MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 103.1MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 736.6MB. Max. memory is 16.1GB. [2024-06-14 14:06:25,348 INFO L158 Benchmark]: Witness Parser took 0.10ms. Allocated memory is still 134.2MB. Free memory is still 99.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 14:06:25,349 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 180.4MB. Free memory is still 151.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 14:06:25,349 INFO L158 Benchmark]: CACSL2BoogieTranslator took 533.79ms. Allocated memory is still 180.4MB. Free memory was 102.8MB in the beginning and 73.0MB in the end (delta: 29.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-06-14 14:06:25,349 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.34ms. Allocated memory is still 180.4MB. Free memory was 73.0MB in the beginning and 69.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-14 14:06:25,349 INFO L158 Benchmark]: Boogie Preprocessor took 60.75ms. Allocated memory is still 180.4MB. Free memory was 69.9MB in the beginning and 67.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 14:06:25,349 INFO L158 Benchmark]: RCFGBuilder took 584.53ms. Allocated memory is still 180.4MB. Free memory was 67.5MB in the beginning and 121.0MB in the end (delta: -53.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-14 14:06:25,349 INFO L158 Benchmark]: TraceAbstraction took 148547.36ms. Allocated memory was 180.4MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 120.1MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 754.7MB. Max. memory is 16.1GB. [2024-06-14 14:06:25,350 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.10ms. Allocated memory is still 134.2MB. Free memory is still 99.3MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 180.4MB. Free memory is still 151.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 533.79ms. Allocated memory is still 180.4MB. Free memory was 102.8MB in the beginning and 73.0MB in the end (delta: 29.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.34ms. Allocated memory is still 180.4MB. Free memory was 73.0MB in the beginning and 69.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.75ms. Allocated memory is still 180.4MB. Free memory was 69.9MB in the beginning and 67.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 584.53ms. Allocated memory is still 180.4MB. Free memory was 67.5MB in the beginning and 121.0MB in the end (delta: -53.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 148547.36ms. Allocated memory was 180.4MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 120.1MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 754.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 780]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 781]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 64 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 148.4s, OverallIterations: 156, TraceHistogramMax: 1, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.0s, AutomataDifference: 109.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12382 SdHoareTripleChecker+Valid, 20.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10421 mSDsluCounter, 2375 SdHoareTripleChecker+Invalid, 17.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1562 mSDsCounter, 1898 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 48181 IncrementalHoareTripleChecker+Invalid, 50079 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1898 mSolverCounterUnsat, 813 mSDtfsCounter, 48181 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1484 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3661occurred in iteration=80, InterpolantAutomatonStates: 1273, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 36.5s InterpolantComputationTime, 3161 NumberOfCodeBlocks, 3161 NumberOfCodeBlocksAsserted, 156 NumberOfCheckSat, 3005 ConstructedInterpolants, 0 QuantifiedInterpolants, 36502 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 156 InterpolantComputations, 156 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-14 14:06:25,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE