./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.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/safe032_tso.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/safe032_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe032_tso.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 14:06:28,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:06:28,959 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:06:28,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:06:28,964 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:06:28,981 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:06:28,983 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:06:28,984 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:06:28,984 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:06:28,987 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:06:28,987 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:06:28,988 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:06:28,989 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:06:28,989 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:06:28,990 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:06:28,990 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:06:28,990 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:06:28,990 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:06:28,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:06:28,991 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:06:28,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:06:28,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:06:28,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:06:28,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:06:28,992 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:06:28,992 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:06:28,992 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:06:28,993 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:06:28,993 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:06:28,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:06:28,994 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:06:28,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:06:28,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:06:28,995 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:06:28,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:06:28,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:06:28,995 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:06:28,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:06:28,996 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:06:28,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:06:28,996 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:06:28,996 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:06:28,996 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:06:28,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:06:29,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:06:29,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:06:29,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:06:29,191 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:06:29,191 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:06:29,192 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe032_tso.yml/witness.yml [2024-06-14 14:06:29,361 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:06:29,376 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:06:29,376 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-14 14:06:30,383 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:06:30,566 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:06:30,567 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-14 14:06:30,585 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e62d7f1a/57999e22c01d4df2a3bb9c3582005804/FLAGab8ccfdcb [2024-06-14 14:06:30,596 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e62d7f1a/57999e22c01d4df2a3bb9c3582005804 [2024-06-14 14:06:30,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:06:30,601 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:06:30,604 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:06:30,605 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:06:30,608 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:06:30,609 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:06:29" (1/2) ... [2024-06-14 14:06:30,610 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75560c16 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:30, skipping insertion in model container [2024-06-14 14:06:30,610 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:06:29" (1/2) ... [2024-06-14 14:06:30,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@56d74e16 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:30, skipping insertion in model container [2024-06-14 14:06:30,611 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:06:30" (2/2) ... [2024-06-14 14:06:30,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75560c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:30, skipping insertion in model container [2024-06-14 14:06:30,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:06:30" (2/2) ... [2024-06-14 14:06:30,613 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:06:30,649 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:06:30,649 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= x) && 0 <= y) && y <= 2) && y <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:06:30,650 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= x) && 0 <= y) && y <= 2) && y <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:06:30,650 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= x) && 0 <= y) && y <= 2) && y <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:06:30,650 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:06:30,650 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-14 14:06:30,687 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:06:30,949 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:06:30,956 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 14:06:31,099 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:06:31,137 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:06:31,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31 WrapperNode [2024-06-14 14:06:31,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:06:31,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:06:31,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:06:31,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:06:31,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,159 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,188 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-14 14:06:31,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:06:31,188 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:06:31,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:06:31,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:06:31,196 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,199 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,214 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 14:06:31,215 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,215 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,221 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,226 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,232 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,236 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:06:31,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:06:31,252 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:06:31,252 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:06:31,253 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (1/1) ... [2024-06-14 14:06:31,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:06:31,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:06:31,289 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 14:06:31,307 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 14:06:31,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:06:31,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:06:31,336 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:06:31,336 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:06:31,336 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:06:31,337 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:06:31,337 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:06:31,337 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:06:31,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:06:31,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:06:31,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:06:31,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:06:31,339 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 14:06:31,458 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:06:31,459 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:06:31,721 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:06:31,721 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:06:31,812 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:06:31,812 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:06:31,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:06:31 BoogieIcfgContainer [2024-06-14 14:06:31,814 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:06:31,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:06:31,816 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:06:31,818 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:06:31,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:06:29" (1/4) ... [2024-06-14 14:06:31,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264114d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:06:31, skipping insertion in model container [2024-06-14 14:06:31,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:06:30" (2/4) ... [2024-06-14 14:06:31,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264114d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:06:31, skipping insertion in model container [2024-06-14 14:06:31,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:31" (3/4) ... [2024-06-14 14:06:31,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264114d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:06:31, skipping insertion in model container [2024-06-14 14:06:31,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:06:31" (4/4) ... [2024-06-14 14:06:31,821 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_tso.i [2024-06-14 14:06:31,833 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:06:31,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 14:06:31,833 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:06:31,880 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:06:31,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 14:06:31,943 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 14:06:31,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:06:31,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 14:06:31,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 14:06:31,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 14:06:31,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:06:31,964 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;@76aa695f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:06:31,964 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 14:06:31,969 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:06:31,969 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:06:31,969 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:06:31,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:31,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:06:31,971 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 14:06:31,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:31,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1786993437, now seen corresponding path program 1 times [2024-06-14 14:06:31,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:31,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112988711] [2024-06-14 14:06:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:31,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:32,573 INFO 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 14:06:32,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:32,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112988711] [2024-06-14 14:06:32,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112988711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:32,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:32,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:06:32,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502264473] [2024-06-14 14:06:32,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:32,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:06:32,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:32,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:06:32,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:06:32,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-14 14:06:32,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:32,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:32,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-14 14:06:32,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:32,828 INFO L124 PetriNetUnfolderBase]: 575/991 cut-off events. [2024-06-14 14:06:32,828 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-14 14:06:32,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1933 conditions, 991 events. 575/991 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5166 event pairs, 361 based on Foata normal form. 1/923 useless extension candidates. Maximal degree in co-relation 1918. Up to 885 conditions per place. [2024-06-14 14:06:32,837 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 30 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 14:06:32,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 171 flow [2024-06-14 14:06:32,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:06:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:06:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-14 14:06:32,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6821705426356589 [2024-06-14 14:06:32,848 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 88 transitions. [2024-06-14 14:06:32,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 171 flow [2024-06-14 14:06:32,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:32,852 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 14:06:32,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 14:06:32,855 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 14:06:32,855 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 14:06:32,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:32,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:32,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:32,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:06:32,856 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 14:06:32,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:32,857 INFO L85 PathProgramCache]: Analyzing trace with hash 686260866, now seen corresponding path program 1 times [2024-06-14 14:06:32,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:32,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807534883] [2024-06-14 14:06:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:32,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:33,029 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 14:06:33,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:33,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807534883] [2024-06-14 14:06:33,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807534883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:33,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:33,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:06:33,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859457755] [2024-06-14 14:06:33,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:33,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:06:33,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:33,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:06:33,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:06:33,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-14 14:06:33,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:33,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-14 14:06:33,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:33,203 INFO L124 PetriNetUnfolderBase]: 569/967 cut-off events. [2024-06-14 14:06:33,204 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-06-14 14:06:33,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2204 conditions, 967 events. 569/967 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4942 event pairs, 293 based on Foata normal form. 3/938 useless extension candidates. Maximal degree in co-relation 2189. Up to 861 conditions per place. [2024-06-14 14:06:33,208 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 37 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 14:06:33,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 238 flow [2024-06-14 14:06:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:06:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:06:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-14 14:06:33,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6686046511627907 [2024-06-14 14:06:33,210 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 115 transitions. [2024-06-14 14:06:33,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 238 flow [2024-06-14 14:06:33,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:06:33,212 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 14:06:33,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 14:06:33,212 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 14:06:33,213 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 14:06:33,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:33,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:33,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:06:33,213 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 14:06:33,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:33,214 INFO L85 PathProgramCache]: Analyzing trace with hash -458046107, now seen corresponding path program 1 times [2024-06-14 14:06:33,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:33,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007890944] [2024-06-14 14:06:33,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:33,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:33,412 INFO 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 14:06:33,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:33,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007890944] [2024-06-14 14:06:33,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007890944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:33,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:33,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:06:33,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973678894] [2024-06-14 14:06:33,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:33,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:06:33,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:33,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:06:33,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:06:33,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:33,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:33,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:33,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:33,570 INFO L124 PetriNetUnfolderBase]: 936/1530 cut-off events. [2024-06-14 14:06:33,570 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2024-06-14 14:06:33,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3856 conditions, 1530 events. 936/1530 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7764 event pairs, 533 based on Foata normal form. 3/1531 useless extension candidates. Maximal degree in co-relation 3839. Up to 1395 conditions per place. [2024-06-14 14:06:33,577 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-06-14 14:06:33,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 306 flow [2024-06-14 14:06:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:06:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:06:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-14 14:06:33,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2024-06-14 14:06:33,579 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 4 states and 109 transitions. [2024-06-14 14:06:33,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 306 flow [2024-06-14 14:06:33,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 292 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:33,581 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 204 flow [2024-06-14 14:06:33,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-06-14 14:06:33,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-14 14:06:33,582 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 204 flow [2024-06-14 14:06:33,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:33,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:33,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:06:33,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:33,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:33,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1901882944, now seen corresponding path program 1 times [2024-06-14 14:06:33,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:33,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809313447] [2024-06-14 14:06:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:33,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:33,725 INFO 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 14:06:33,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:33,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809313447] [2024-06-14 14:06:33,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809313447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:33,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:33,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:33,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502830618] [2024-06-14 14:06:33,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:33,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:33,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:33,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:33,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-14 14:06:33,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:33,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-14 14:06:33,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:33,953 INFO L124 PetriNetUnfolderBase]: 857/1494 cut-off events. [2024-06-14 14:06:33,953 INFO L125 PetriNetUnfolderBase]: For 1498/1498 co-relation queries the response was YES. [2024-06-14 14:06:33,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4120 conditions, 1494 events. 857/1494 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7958 event pairs, 254 based on Foata normal form. 6/1464 useless extension candidates. Maximal degree in co-relation 4101. Up to 1227 conditions per place. [2024-06-14 14:06:33,961 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 55 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-14 14:06:33,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 424 flow [2024-06-14 14:06:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 14:06:33,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-06-14 14:06:33,963 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 204 flow. Second operand 6 states and 160 transitions. [2024-06-14 14:06:33,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 424 flow [2024-06-14 14:06:33,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 78 transitions, 418 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-14 14:06:33,966 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 259 flow [2024-06-14 14:06:33,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=259, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-14 14:06:33,967 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-14 14:06:33,967 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 259 flow [2024-06-14 14:06:33,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:33,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:33,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:06:33,968 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 14:06:33,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1534252366, now seen corresponding path program 1 times [2024-06-14 14:06:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:33,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396982036] [2024-06-14 14:06:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:34,140 INFO 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 14:06:34,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:34,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396982036] [2024-06-14 14:06:34,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396982036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:34,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:34,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:34,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871341989] [2024-06-14 14:06:34,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:34,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:34,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:34,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:34,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:34,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:34,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:34,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:34,345 INFO L124 PetriNetUnfolderBase]: 968/1627 cut-off events. [2024-06-14 14:06:34,346 INFO L125 PetriNetUnfolderBase]: For 2753/2753 co-relation queries the response was YES. [2024-06-14 14:06:34,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5014 conditions, 1627 events. 968/1627 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8523 event pairs, 346 based on Foata normal form. 4/1623 useless extension candidates. Maximal degree in co-relation 4991. Up to 1333 conditions per place. [2024-06-14 14:06:34,355 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 22 changer transitions 0/89 dead transitions. [2024-06-14 14:06:34,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 581 flow [2024-06-14 14:06:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:34,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-14 14:06:34,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6558139534883721 [2024-06-14 14:06:34,357 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 259 flow. Second operand 5 states and 141 transitions. [2024-06-14 14:06:34,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 581 flow [2024-06-14 14:06:34,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 550 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:34,360 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 385 flow [2024-06-14 14:06:34,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=385, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2024-06-14 14:06:34,360 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 14:06:34,361 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 385 flow [2024-06-14 14:06:34,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:34,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:34,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:06:34,361 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 14:06:34,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:34,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1408350042, now seen corresponding path program 2 times [2024-06-14 14:06:34,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:34,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495328987] [2024-06-14 14:06:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:34,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:34,550 INFO 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 14:06:34,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:34,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495328987] [2024-06-14 14:06:34,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495328987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:34,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:34,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:34,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971496763] [2024-06-14 14:06:34,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:34,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:34,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:34,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:34,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:34,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 385 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:34,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:34,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:34,744 INFO L124 PetriNetUnfolderBase]: 993/1673 cut-off events. [2024-06-14 14:06:34,745 INFO L125 PetriNetUnfolderBase]: For 4545/4545 co-relation queries the response was YES. [2024-06-14 14:06:34,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5994 conditions, 1673 events. 993/1673 cut-off events. For 4545/4545 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8868 event pairs, 374 based on Foata normal form. 4/1671 useless extension candidates. Maximal degree in co-relation 5968. Up to 1359 conditions per place. [2024-06-14 14:06:34,755 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 30 changer transitions 0/93 dead transitions. [2024-06-14 14:06:34,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 93 transitions, 697 flow [2024-06-14 14:06:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 14:06:34,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2024-06-14 14:06:34,756 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 385 flow. Second operand 5 states and 137 transitions. [2024-06-14 14:06:34,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 93 transitions, 697 flow [2024-06-14 14:06:34,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 667 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-14 14:06:34,762 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 548 flow [2024-06-14 14:06:34,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=548, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2024-06-14 14:06:34,763 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-14 14:06:34,763 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 548 flow [2024-06-14 14:06:34,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:34,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:34,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:06:34,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:34,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:34,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1430684364, now seen corresponding path program 1 times [2024-06-14 14:06:34,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:34,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317427360] [2024-06-14 14:06:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:34,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:34,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:34,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317427360] [2024-06-14 14:06:34,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317427360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:34,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:34,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:34,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506355046] [2024-06-14 14:06:34,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:34,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:34,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:34,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:34,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:34,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:34,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 548 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:34,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:34,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:35,184 INFO L124 PetriNetUnfolderBase]: 995/1683 cut-off events. [2024-06-14 14:06:35,184 INFO L125 PetriNetUnfolderBase]: For 5890/5890 co-relation queries the response was YES. [2024-06-14 14:06:35,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6468 conditions, 1683 events. 995/1683 cut-off events. For 5890/5890 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8902 event pairs, 343 based on Foata normal form. 3/1684 useless extension candidates. Maximal degree in co-relation 6437. Up to 1456 conditions per place. [2024-06-14 14:06:35,195 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 74 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-14 14:06:35,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 828 flow [2024-06-14 14:06:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-14 14:06:35,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-06-14 14:06:35,196 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 548 flow. Second operand 5 states and 132 transitions. [2024-06-14 14:06:35,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 828 flow [2024-06-14 14:06:35,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 795 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-14 14:06:35,203 INFO L231 Difference]: Finished difference. Result has 71 places, 83 transitions, 612 flow [2024-06-14 14:06:35,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=612, PETRI_PLACES=71, PETRI_TRANSITIONS=83} [2024-06-14 14:06:35,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 14:06:35,204 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 83 transitions, 612 flow [2024-06-14 14:06:35,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:35,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:35,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:35,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:06:35,205 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:35,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:35,205 INFO L85 PathProgramCache]: Analyzing trace with hash -981907983, now seen corresponding path program 1 times [2024-06-14 14:06:35,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:35,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343621835] [2024-06-14 14:06:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:35,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:35,403 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 14:06:35,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:35,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343621835] [2024-06-14 14:06:35,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343621835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:35,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:35,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:06:35,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894066400] [2024-06-14 14:06:35,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:35,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:06:35,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:35,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:06:35,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:06:35,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:35,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 83 transitions, 612 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:35,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:35,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:35,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:35,582 INFO L124 PetriNetUnfolderBase]: 983/1654 cut-off events. [2024-06-14 14:06:35,582 INFO L125 PetriNetUnfolderBase]: For 7065/7065 co-relation queries the response was YES. [2024-06-14 14:06:35,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6635 conditions, 1654 events. 983/1654 cut-off events. For 7065/7065 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8649 event pairs, 355 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 6602. Up to 1462 conditions per place. [2024-06-14 14:06:35,593 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 72 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2024-06-14 14:06:35,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 798 flow [2024-06-14 14:06:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:06:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:06:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-14 14:06:35,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5988372093023255 [2024-06-14 14:06:35,595 INFO L175 Difference]: Start difference. First operand has 71 places, 83 transitions, 612 flow. Second operand 4 states and 103 transitions. [2024-06-14 14:06:35,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 798 flow [2024-06-14 14:06:35,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 91 transitions, 768 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-14 14:06:35,603 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 612 flow [2024-06-14 14:06:35,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=612, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-14 14:06:35,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-14 14:06:35,604 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 612 flow [2024-06-14 14:06:35,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:35,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:35,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:35,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:06:35,605 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 14:06:35,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:35,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1237997805, now seen corresponding path program 1 times [2024-06-14 14:06:35,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:35,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208602578] [2024-06-14 14:06:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:35,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:35,827 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 14:06:35,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:35,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208602578] [2024-06-14 14:06:35,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208602578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:35,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:35,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:35,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310559016] [2024-06-14 14:06:35,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:35,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:35,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:35,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:35,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:35,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 612 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:35,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:35,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:35,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:36,093 INFO L124 PetriNetUnfolderBase]: 1040/1746 cut-off events. [2024-06-14 14:06:36,093 INFO L125 PetriNetUnfolderBase]: For 8162/8162 co-relation queries the response was YES. [2024-06-14 14:06:36,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7157 conditions, 1746 events. 1040/1746 cut-off events. For 8162/8162 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9184 event pairs, 331 based on Foata normal form. 3/1747 useless extension candidates. Maximal degree in co-relation 7121. Up to 1488 conditions per place. [2024-06-14 14:06:36,106 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 85 selfloop transitions, 25 changer transitions 0/118 dead transitions. [2024-06-14 14:06:36,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 118 transitions, 1022 flow [2024-06-14 14:06:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 14:06:36,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2024-06-14 14:06:36,108 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 612 flow. Second operand 6 states and 154 transitions. [2024-06-14 14:06:36,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 118 transitions, 1022 flow [2024-06-14 14:06:36,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 118 transitions, 994 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:36,117 INFO L231 Difference]: Finished difference. Result has 78 places, 98 transitions, 810 flow [2024-06-14 14:06:36,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=810, PETRI_PLACES=78, PETRI_TRANSITIONS=98} [2024-06-14 14:06:36,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-14 14:06:36,117 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 98 transitions, 810 flow [2024-06-14 14:06:36,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:36,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:36,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:06:36,118 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 14:06:36,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:36,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1238117775, now seen corresponding path program 2 times [2024-06-14 14:06:36,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:36,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99499777] [2024-06-14 14:06:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:36,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:36,320 INFO 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 14:06:36,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:36,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99499777] [2024-06-14 14:06:36,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99499777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:36,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:36,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:36,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209039556] [2024-06-14 14:06:36,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:36,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:36,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:36,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:36,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:36,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:36,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 98 transitions, 810 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:36,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:36,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:36,606 INFO L124 PetriNetUnfolderBase]: 1097/1853 cut-off events. [2024-06-14 14:06:36,606 INFO L125 PetriNetUnfolderBase]: For 10853/10853 co-relation queries the response was YES. [2024-06-14 14:06:36,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8209 conditions, 1853 events. 1097/1853 cut-off events. For 10853/10853 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10014 event pairs, 331 based on Foata normal form. 4/1851 useless extension candidates. Maximal degree in co-relation 8172. Up to 1348 conditions per place. [2024-06-14 14:06:36,619 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 85 selfloop transitions, 64 changer transitions 0/157 dead transitions. [2024-06-14 14:06:36,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 157 transitions, 1478 flow [2024-06-14 14:06:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-14 14:06:36,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-06-14 14:06:36,620 INFO L175 Difference]: Start difference. First operand has 78 places, 98 transitions, 810 flow. Second operand 9 states and 240 transitions. [2024-06-14 14:06:36,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 157 transitions, 1478 flow [2024-06-14 14:06:36,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 157 transitions, 1440 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:36,631 INFO L231 Difference]: Finished difference. Result has 86 places, 115 transitions, 1074 flow [2024-06-14 14:06:36,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1074, PETRI_PLACES=86, PETRI_TRANSITIONS=115} [2024-06-14 14:06:36,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-14 14:06:36,632 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 115 transitions, 1074 flow [2024-06-14 14:06:36,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:36,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:36,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:06:36,633 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 14:06:36,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1242766349, now seen corresponding path program 1 times [2024-06-14 14:06:36,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:36,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054422456] [2024-06-14 14:06:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:36,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:36,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:36,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054422456] [2024-06-14 14:06:36,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054422456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:36,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:36,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:36,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225816541] [2024-06-14 14:06:36,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:36,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:36,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:36,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:36,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:36,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:36,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 115 transitions, 1074 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:36,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:36,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:37,213 INFO L124 PetriNetUnfolderBase]: 1130/1908 cut-off events. [2024-06-14 14:06:37,213 INFO L125 PetriNetUnfolderBase]: For 14202/14202 co-relation queries the response was YES. [2024-06-14 14:06:37,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9295 conditions, 1908 events. 1130/1908 cut-off events. For 14202/14202 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10393 event pairs, 323 based on Foata normal form. 4/1903 useless extension candidates. Maximal degree in co-relation 9255. Up to 1433 conditions per place. [2024-06-14 14:06:37,227 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 99 selfloop transitions, 47 changer transitions 0/154 dead transitions. [2024-06-14 14:06:37,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 154 transitions, 1602 flow [2024-06-14 14:06:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-14 14:06:37,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472868217054264 [2024-06-14 14:06:37,229 INFO L175 Difference]: Start difference. First operand has 86 places, 115 transitions, 1074 flow. Second operand 6 states and 167 transitions. [2024-06-14 14:06:37,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 154 transitions, 1602 flow [2024-06-14 14:06:37,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 154 transitions, 1455 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:37,246 INFO L231 Difference]: Finished difference. Result has 90 places, 128 transitions, 1165 flow [2024-06-14 14:06:37,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1165, PETRI_PLACES=90, PETRI_TRANSITIONS=128} [2024-06-14 14:06:37,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 14:06:37,247 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 128 transitions, 1165 flow [2024-06-14 14:06:37,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:37,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:37,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:06:37,248 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:37,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash -38678205, now seen corresponding path program 3 times [2024-06-14 14:06:37,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:37,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766415419] [2024-06-14 14:06:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:37,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:37,451 INFO 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 14:06:37,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:37,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766415419] [2024-06-14 14:06:37,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766415419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:37,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:37,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:37,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785046282] [2024-06-14 14:06:37,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:37,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:37,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:37,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:37,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:37,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 128 transitions, 1165 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:37,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:37,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:37,756 INFO L124 PetriNetUnfolderBase]: 1145/1940 cut-off events. [2024-06-14 14:06:37,757 INFO L125 PetriNetUnfolderBase]: For 16037/16037 co-relation queries the response was YES. [2024-06-14 14:06:37,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9780 conditions, 1940 events. 1145/1940 cut-off events. For 16037/16037 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10624 event pairs, 328 based on Foata normal form. 4/1940 useless extension candidates. Maximal degree in co-relation 9737. Up to 1413 conditions per place. [2024-06-14 14:06:37,770 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 66 changer transitions 0/171 dead transitions. [2024-06-14 14:06:37,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 171 transitions, 1743 flow [2024-06-14 14:06:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 14:06:37,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 14:06:37,771 INFO L175 Difference]: Start difference. First operand has 90 places, 128 transitions, 1165 flow. Second operand 8 states and 215 transitions. [2024-06-14 14:06:37,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 171 transitions, 1743 flow [2024-06-14 14:06:37,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 171 transitions, 1690 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-14 14:06:37,790 INFO L231 Difference]: Finished difference. Result has 98 places, 137 transitions, 1360 flow [2024-06-14 14:06:37,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=98, PETRI_TRANSITIONS=137} [2024-06-14 14:06:37,791 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-14 14:06:37,791 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 137 transitions, 1360 flow [2024-06-14 14:06:37,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:37,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:37,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:06:37,791 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:37,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:37,792 INFO L85 PathProgramCache]: Analyzing trace with hash -506693741, now seen corresponding path program 2 times [2024-06-14 14:06:37,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:37,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100156148] [2024-06-14 14:06:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:37,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:37,972 INFO 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 14:06:37,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:37,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100156148] [2024-06-14 14:06:37,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100156148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:37,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:37,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:37,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669412274] [2024-06-14 14:06:37,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:37,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:37,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:37,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:37,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:38,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:38,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 137 transitions, 1360 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:38,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:38,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:38,280 INFO L124 PetriNetUnfolderBase]: 1200/2037 cut-off events. [2024-06-14 14:06:38,280 INFO L125 PetriNetUnfolderBase]: For 19633/19633 co-relation queries the response was YES. [2024-06-14 14:06:38,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10730 conditions, 2037 events. 1200/2037 cut-off events. For 19633/19633 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11308 event pairs, 332 based on Foata normal form. 4/2037 useless extension candidates. Maximal degree in co-relation 10683. Up to 1507 conditions per place. [2024-06-14 14:06:38,296 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 111 selfloop transitions, 55 changer transitions 0/174 dead transitions. [2024-06-14 14:06:38,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 174 transitions, 1980 flow [2024-06-14 14:06:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 14:06:38,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434108527131783 [2024-06-14 14:06:38,298 INFO L175 Difference]: Start difference. First operand has 98 places, 137 transitions, 1360 flow. Second operand 6 states and 166 transitions. [2024-06-14 14:06:38,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 174 transitions, 1980 flow [2024-06-14 14:06:38,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 174 transitions, 1863 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:38,321 INFO L231 Difference]: Finished difference. Result has 101 places, 151 transitions, 1536 flow [2024-06-14 14:06:38,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1536, PETRI_PLACES=101, PETRI_TRANSITIONS=151} [2024-06-14 14:06:38,322 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 14:06:38,322 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 151 transitions, 1536 flow [2024-06-14 14:06:38,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:38,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:38,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:06:38,323 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:38,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:38,323 INFO L85 PathProgramCache]: Analyzing trace with hash 449353923, now seen corresponding path program 3 times [2024-06-14 14:06:38,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:38,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474377132] [2024-06-14 14:06:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:38,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:38,487 INFO 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 14:06:38,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:38,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474377132] [2024-06-14 14:06:38,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474377132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:38,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:38,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:38,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788053568] [2024-06-14 14:06:38,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:38,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:38,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:38,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:38,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:38,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:38,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 151 transitions, 1536 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:38,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:38,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:38,746 INFO L124 PetriNetUnfolderBase]: 1191/2025 cut-off events. [2024-06-14 14:06:38,746 INFO L125 PetriNetUnfolderBase]: For 21478/21478 co-relation queries the response was YES. [2024-06-14 14:06:38,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10922 conditions, 2025 events. 1191/2025 cut-off events. For 21478/21478 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11234 event pairs, 332 based on Foata normal form. 4/2025 useless extension candidates. Maximal degree in co-relation 10873. Up to 1501 conditions per place. [2024-06-14 14:06:38,760 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 110 selfloop transitions, 55 changer transitions 0/173 dead transitions. [2024-06-14 14:06:38,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 173 transitions, 1998 flow [2024-06-14 14:06:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-14 14:06:38,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6356589147286822 [2024-06-14 14:06:38,761 INFO L175 Difference]: Start difference. First operand has 101 places, 151 transitions, 1536 flow. Second operand 6 states and 164 transitions. [2024-06-14 14:06:38,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 173 transitions, 1998 flow [2024-06-14 14:06:38,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 173 transitions, 1946 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-14 14:06:38,790 INFO L231 Difference]: Finished difference. Result has 107 places, 151 transitions, 1605 flow [2024-06-14 14:06:38,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1605, PETRI_PLACES=107, PETRI_TRANSITIONS=151} [2024-06-14 14:06:38,791 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 14:06:38,791 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 151 transitions, 1605 flow [2024-06-14 14:06:38,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:38,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:38,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:06:38,792 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:38,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:38,792 INFO L85 PathProgramCache]: Analyzing trace with hash -498111949, now seen corresponding path program 1 times [2024-06-14 14:06:38,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:38,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081189022] [2024-06-14 14:06:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:38,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:38,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081189022] [2024-06-14 14:06:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081189022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:38,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:38,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:38,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515596145] [2024-06-14 14:06:38,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:38,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:38,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:38,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:39,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:39,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 151 transitions, 1605 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:39,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:39,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:39,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:39,274 INFO L124 PetriNetUnfolderBase]: 1191/2027 cut-off events. [2024-06-14 14:06:39,274 INFO L125 PetriNetUnfolderBase]: For 24120/24120 co-relation queries the response was YES. [2024-06-14 14:06:39,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11283 conditions, 2027 events. 1191/2027 cut-off events. For 24120/24120 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11134 event pairs, 313 based on Foata normal form. 6/2031 useless extension candidates. Maximal degree in co-relation 11231. Up to 1713 conditions per place. [2024-06-14 14:06:39,288 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 147 selfloop transitions, 20 changer transitions 0/175 dead transitions. [2024-06-14 14:06:39,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 175 transitions, 2067 flow [2024-06-14 14:06:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 14:06:39,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007751937984496 [2024-06-14 14:06:39,289 INFO L175 Difference]: Start difference. First operand has 107 places, 151 transitions, 1605 flow. Second operand 6 states and 155 transitions. [2024-06-14 14:06:39,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 175 transitions, 2067 flow [2024-06-14 14:06:39,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 175 transitions, 1949 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:39,314 INFO L231 Difference]: Finished difference. Result has 109 places, 154 transitions, 1589 flow [2024-06-14 14:06:39,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1589, PETRI_PLACES=109, PETRI_TRANSITIONS=154} [2024-06-14 14:06:39,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-14 14:06:39,316 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 154 transitions, 1589 flow [2024-06-14 14:06:39,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:39,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:39,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:39,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:06:39,316 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 14:06:39,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash -374375099, now seen corresponding path program 1 times [2024-06-14 14:06:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:39,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130855428] [2024-06-14 14:06:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:39,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:39,500 INFO 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 14:06:39,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130855428] [2024-06-14 14:06:39,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130855428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:39,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:39,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:39,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740516771] [2024-06-14 14:06:39,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:39,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:39,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:39,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:39,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:39,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 154 transitions, 1589 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:39,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:39,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:39,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:39,770 INFO L124 PetriNetUnfolderBase]: 1183/2002 cut-off events. [2024-06-14 14:06:39,770 INFO L125 PetriNetUnfolderBase]: For 24833/24833 co-relation queries the response was YES. [2024-06-14 14:06:39,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11213 conditions, 2002 events. 1183/2002 cut-off events. For 24833/24833 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11033 event pairs, 333 based on Foata normal form. 4/1997 useless extension candidates. Maximal degree in co-relation 11160. Up to 1628 conditions per place. [2024-06-14 14:06:39,783 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 121 selfloop transitions, 36 changer transitions 0/165 dead transitions. [2024-06-14 14:06:39,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 165 transitions, 1989 flow [2024-06-14 14:06:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 14:06:39,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-14 14:06:39,785 INFO L175 Difference]: Start difference. First operand has 109 places, 154 transitions, 1589 flow. Second operand 5 states and 130 transitions. [2024-06-14 14:06:39,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 165 transitions, 1989 flow [2024-06-14 14:06:39,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 165 transitions, 1911 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:39,807 INFO L231 Difference]: Finished difference. Result has 110 places, 154 transitions, 1593 flow [2024-06-14 14:06:39,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1593, PETRI_PLACES=110, PETRI_TRANSITIONS=154} [2024-06-14 14:06:39,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-14 14:06:39,808 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 154 transitions, 1593 flow [2024-06-14 14:06:39,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:39,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:39,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:39,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:06:39,809 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 14:06:39,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:39,810 INFO L85 PathProgramCache]: Analyzing trace with hash -342392084, now seen corresponding path program 1 times [2024-06-14 14:06:39,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:39,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273750772] [2024-06-14 14:06:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:39,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:40,013 INFO 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 14:06:40,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:40,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273750772] [2024-06-14 14:06:40,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273750772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:40,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:40,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:40,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230651156] [2024-06-14 14:06:40,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:40,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:40,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:40,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:40,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:40,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:40,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 154 transitions, 1593 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:40,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:40,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:40,278 INFO L124 PetriNetUnfolderBase]: 1180/2009 cut-off events. [2024-06-14 14:06:40,278 INFO L125 PetriNetUnfolderBase]: For 25966/25966 co-relation queries the response was YES. [2024-06-14 14:06:40,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11284 conditions, 2009 events. 1180/2009 cut-off events. For 25966/25966 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11108 event pairs, 322 based on Foata normal form. 3/2006 useless extension candidates. Maximal degree in co-relation 11230. Up to 1627 conditions per place. [2024-06-14 14:06:40,294 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 126 selfloop transitions, 40 changer transitions 0/174 dead transitions. [2024-06-14 14:06:40,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 174 transitions, 2080 flow [2024-06-14 14:06:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-14 14:06:40,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-14 14:06:40,296 INFO L175 Difference]: Start difference. First operand has 110 places, 154 transitions, 1593 flow. Second operand 5 states and 135 transitions. [2024-06-14 14:06:40,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 174 transitions, 2080 flow [2024-06-14 14:06:40,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 174 transitions, 1956 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:40,328 INFO L231 Difference]: Finished difference. Result has 109 places, 157 transitions, 1610 flow [2024-06-14 14:06:40,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1610, PETRI_PLACES=109, PETRI_TRANSITIONS=157} [2024-06-14 14:06:40,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-14 14:06:40,329 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 157 transitions, 1610 flow [2024-06-14 14:06:40,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:40,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:40,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:06:40,330 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 14:06:40,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:40,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1279259280, now seen corresponding path program 2 times [2024-06-14 14:06:40,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:40,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897685304] [2024-06-14 14:06:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:40,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:40,544 INFO 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 14:06:40,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:40,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897685304] [2024-06-14 14:06:40,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897685304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:40,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:40,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:40,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868618838] [2024-06-14 14:06:40,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:40,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:40,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:40,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:40,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 157 transitions, 1610 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:40,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:40,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:40,801 INFO L124 PetriNetUnfolderBase]: 1152/1945 cut-off events. [2024-06-14 14:06:40,801 INFO L125 PetriNetUnfolderBase]: For 26885/26885 co-relation queries the response was YES. [2024-06-14 14:06:40,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10899 conditions, 1945 events. 1152/1945 cut-off events. For 26885/26885 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10654 event pairs, 337 based on Foata normal form. 4/1940 useless extension candidates. Maximal degree in co-relation 10848. Up to 1597 conditions per place. [2024-06-14 14:06:40,820 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 122 selfloop transitions, 37 changer transitions 0/167 dead transitions. [2024-06-14 14:06:40,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 167 transitions, 1986 flow [2024-06-14 14:06:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-14 14:06:40,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:06:40,821 INFO L175 Difference]: Start difference. First operand has 109 places, 157 transitions, 1610 flow. Second operand 5 states and 129 transitions. [2024-06-14 14:06:40,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 167 transitions, 1986 flow [2024-06-14 14:06:40,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 167 transitions, 1923 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:40,853 INFO L231 Difference]: Finished difference. Result has 112 places, 157 transitions, 1630 flow [2024-06-14 14:06:40,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1630, PETRI_PLACES=112, PETRI_TRANSITIONS=157} [2024-06-14 14:06:40,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-14 14:06:40,853 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 157 transitions, 1630 flow [2024-06-14 14:06:40,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:40,854 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 14:06:40,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:06:40,854 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:40,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1489475838, now seen corresponding path program 1 times [2024-06-14 14:06:40,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:40,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073501431] [2024-06-14 14:06:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:40,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:41,094 INFO 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 14:06:41,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:41,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073501431] [2024-06-14 14:06:41,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073501431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:41,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:41,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:41,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786333192] [2024-06-14 14:06:41,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:41,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:41,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:41,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:41,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:41,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:41,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 157 transitions, 1630 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:41,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:41,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:41,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:41,461 INFO L124 PetriNetUnfolderBase]: 1231/2090 cut-off events. [2024-06-14 14:06:41,461 INFO L125 PetriNetUnfolderBase]: For 31566/31566 co-relation queries the response was YES. [2024-06-14 14:06:41,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 2090 events. 1231/2090 cut-off events. For 31566/31566 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11573 event pairs, 188 based on Foata normal form. 6/2094 useless extension candidates. Maximal degree in co-relation 11783. Up to 1646 conditions per place. [2024-06-14 14:06:41,476 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 159 selfloop transitions, 28 changer transitions 0/195 dead transitions. [2024-06-14 14:06:41,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 195 transitions, 2298 flow [2024-06-14 14:06:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 14:06:41,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6079734219269103 [2024-06-14 14:06:41,478 INFO L175 Difference]: Start difference. First operand has 112 places, 157 transitions, 1630 flow. Second operand 7 states and 183 transitions. [2024-06-14 14:06:41,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 195 transitions, 2298 flow [2024-06-14 14:06:41,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 195 transitions, 2153 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:41,512 INFO L231 Difference]: Finished difference. Result has 114 places, 163 transitions, 1656 flow [2024-06-14 14:06:41,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1656, PETRI_PLACES=114, PETRI_TRANSITIONS=163} [2024-06-14 14:06:41,513 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-14 14:06:41,513 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 163 transitions, 1656 flow [2024-06-14 14:06:41,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:41,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:41,513 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 14:06:41,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:06:41,514 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:41,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:41,514 INFO L85 PathProgramCache]: Analyzing trace with hash 673630146, now seen corresponding path program 2 times [2024-06-14 14:06:41,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:41,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169697020] [2024-06-14 14:06:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:41,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:41,714 INFO 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 14:06:41,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:41,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169697020] [2024-06-14 14:06:41,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169697020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:41,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:41,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:41,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935844664] [2024-06-14 14:06:41,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:41,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:41,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:41,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:41,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:41,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:41,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 163 transitions, 1656 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:41,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:41,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:41,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:42,125 INFO L124 PetriNetUnfolderBase]: 1234/2089 cut-off events. [2024-06-14 14:06:42,125 INFO L125 PetriNetUnfolderBase]: For 33306/33306 co-relation queries the response was YES. [2024-06-14 14:06:42,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12143 conditions, 2089 events. 1234/2089 cut-off events. For 33306/33306 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11502 event pairs, 287 based on Foata normal form. 6/2093 useless extension candidates. Maximal degree in co-relation 12089. Up to 1750 conditions per place. [2024-06-14 14:06:42,139 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 155 selfloop transitions, 28 changer transitions 0/191 dead transitions. [2024-06-14 14:06:42,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 191 transitions, 2180 flow [2024-06-14 14:06:42,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:06:42,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-14 14:06:42,140 INFO L175 Difference]: Start difference. First operand has 114 places, 163 transitions, 1656 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:06:42,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 191 transitions, 2180 flow [2024-06-14 14:06:42,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 191 transitions, 2068 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:42,181 INFO L231 Difference]: Finished difference. Result has 118 places, 166 transitions, 1672 flow [2024-06-14 14:06:42,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1672, PETRI_PLACES=118, PETRI_TRANSITIONS=166} [2024-06-14 14:06:42,182 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-14 14:06:42,182 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 166 transitions, 1672 flow [2024-06-14 14:06:42,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:42,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:42,182 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 14:06:42,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:06:42,183 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:42,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:42,183 INFO L85 PathProgramCache]: Analyzing trace with hash 673635106, now seen corresponding path program 1 times [2024-06-14 14:06:42,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:42,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730329617] [2024-06-14 14:06:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:42,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:42,366 INFO 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 14:06:42,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:42,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730329617] [2024-06-14 14:06:42,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730329617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:42,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:42,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:42,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387240018] [2024-06-14 14:06:42,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:42,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:42,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:42,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:42,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:42,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:42,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 166 transitions, 1672 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:42,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:42,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:42,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:42,687 INFO L124 PetriNetUnfolderBase]: 1273/2153 cut-off events. [2024-06-14 14:06:42,687 INFO L125 PetriNetUnfolderBase]: For 35240/35240 co-relation queries the response was YES. [2024-06-14 14:06:42,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12474 conditions, 2153 events. 1273/2153 cut-off events. For 35240/35240 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11884 event pairs, 272 based on Foata normal form. 3/2154 useless extension candidates. Maximal degree in co-relation 12418. Up to 1793 conditions per place. [2024-06-14 14:06:42,704 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 158 selfloop transitions, 37 changer transitions 0/203 dead transitions. [2024-06-14 14:06:42,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 203 transitions, 2299 flow [2024-06-14 14:06:42,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:06:42,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-14 14:06:42,705 INFO L175 Difference]: Start difference. First operand has 118 places, 166 transitions, 1672 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:06:42,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 203 transitions, 2299 flow [2024-06-14 14:06:42,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 203 transitions, 2217 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:42,748 INFO L231 Difference]: Finished difference. Result has 121 places, 179 transitions, 1853 flow [2024-06-14 14:06:42,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1853, PETRI_PLACES=121, PETRI_TRANSITIONS=179} [2024-06-14 14:06:42,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-14 14:06:42,749 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 179 transitions, 1853 flow [2024-06-14 14:06:42,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:42,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:42,749 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 14:06:42,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:06:42,750 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:42,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:42,750 INFO L85 PathProgramCache]: Analyzing trace with hash 788921316, now seen corresponding path program 3 times [2024-06-14 14:06:42,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:42,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133491701] [2024-06-14 14:06:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:42,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:42,966 INFO 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 14:06:42,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:42,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133491701] [2024-06-14 14:06:42,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133491701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:42,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:42,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:42,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210791976] [2024-06-14 14:06:42,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:42,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:42,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:42,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:42,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:43,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:43,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 179 transitions, 1853 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:43,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:43,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:43,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:43,336 INFO L124 PetriNetUnfolderBase]: 1326/2237 cut-off events. [2024-06-14 14:06:43,336 INFO L125 PetriNetUnfolderBase]: For 42180/42180 co-relation queries the response was YES. [2024-06-14 14:06:43,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13330 conditions, 2237 events. 1326/2237 cut-off events. For 42180/42180 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12448 event pairs, 281 based on Foata normal form. 14/2245 useless extension candidates. Maximal degree in co-relation 13272. Up to 1662 conditions per place. [2024-06-14 14:06:43,354 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 143 selfloop transitions, 77 changer transitions 0/228 dead transitions. [2024-06-14 14:06:43,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 228 transitions, 2647 flow [2024-06-14 14:06:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-14 14:06:43,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-06-14 14:06:43,358 INFO L175 Difference]: Start difference. First operand has 121 places, 179 transitions, 1853 flow. Second operand 10 states and 264 transitions. [2024-06-14 14:06:43,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 228 transitions, 2647 flow [2024-06-14 14:06:43,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 228 transitions, 2575 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:43,413 INFO L231 Difference]: Finished difference. Result has 128 places, 182 transitions, 2012 flow [2024-06-14 14:06:43,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2012, PETRI_PLACES=128, PETRI_TRANSITIONS=182} [2024-06-14 14:06:43,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-14 14:06:43,414 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 182 transitions, 2012 flow [2024-06-14 14:06:43,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:43,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:43,415 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 14:06:43,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:06:43,415 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:43,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:43,415 INFO L85 PathProgramCache]: Analyzing trace with hash 954565410, now seen corresponding path program 2 times [2024-06-14 14:06:43,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:43,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640246299] [2024-06-14 14:06:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:43,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:43,599 INFO 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 14:06:43,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:43,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640246299] [2024-06-14 14:06:43,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640246299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:43,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:43,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:43,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994707848] [2024-06-14 14:06:43,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:43,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:43,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:43,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:43,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:43,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 182 transitions, 2012 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:43,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:43,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:43,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:43,956 INFO L124 PetriNetUnfolderBase]: 1403/2366 cut-off events. [2024-06-14 14:06:43,957 INFO L125 PetriNetUnfolderBase]: For 46247/46247 co-relation queries the response was YES. [2024-06-14 14:06:43,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14712 conditions, 2366 events. 1403/2366 cut-off events. For 46247/46247 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13343 event pairs, 284 based on Foata normal form. 4/2360 useless extension candidates. Maximal degree in co-relation 14652. Up to 1535 conditions per place. [2024-06-14 14:06:43,972 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 122 selfloop transitions, 120 changer transitions 0/250 dead transitions. [2024-06-14 14:06:43,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 250 transitions, 3252 flow [2024-06-14 14:06:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-14 14:06:43,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6348837209302326 [2024-06-14 14:06:43,974 INFO L175 Difference]: Start difference. First operand has 128 places, 182 transitions, 2012 flow. Second operand 10 states and 273 transitions. [2024-06-14 14:06:43,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 250 transitions, 3252 flow [2024-06-14 14:06:44,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 250 transitions, 3061 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:44,027 INFO L231 Difference]: Finished difference. Result has 131 places, 203 transitions, 2369 flow [2024-06-14 14:06:44,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2369, PETRI_PLACES=131, PETRI_TRANSITIONS=203} [2024-06-14 14:06:44,028 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-14 14:06:44,028 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 203 transitions, 2369 flow [2024-06-14 14:06:44,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:44,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:44,028 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 14:06:44,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:06:44,029 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:44,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:44,029 INFO L85 PathProgramCache]: Analyzing trace with hash 961231650, now seen corresponding path program 3 times [2024-06-14 14:06:44,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:44,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523607422] [2024-06-14 14:06:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:44,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:44,193 INFO 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 14:06:44,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:44,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523607422] [2024-06-14 14:06:44,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523607422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:44,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:44,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:44,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360142103] [2024-06-14 14:06:44,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:44,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:44,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:44,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:44,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:44,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:44,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 203 transitions, 2369 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:44,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:44,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:44,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:44,596 INFO L124 PetriNetUnfolderBase]: 1392/2351 cut-off events. [2024-06-14 14:06:44,596 INFO L125 PetriNetUnfolderBase]: For 50218/50218 co-relation queries the response was YES. [2024-06-14 14:06:44,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15102 conditions, 2351 events. 1392/2351 cut-off events. For 50218/50218 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13301 event pairs, 284 based on Foata normal form. 4/2345 useless extension candidates. Maximal degree in co-relation 15040. Up to 1526 conditions per place. [2024-06-14 14:06:44,617 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 121 selfloop transitions, 124 changer transitions 0/253 dead transitions. [2024-06-14 14:06:44,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 253 transitions, 3333 flow [2024-06-14 14:06:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:44,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 293 transitions. [2024-06-14 14:06:44,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194503171247357 [2024-06-14 14:06:44,620 INFO L175 Difference]: Start difference. First operand has 131 places, 203 transitions, 2369 flow. Second operand 11 states and 293 transitions. [2024-06-14 14:06:44,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 253 transitions, 3333 flow [2024-06-14 14:06:44,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 253 transitions, 3054 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:44,748 INFO L231 Difference]: Finished difference. Result has 139 places, 203 transitions, 2349 flow [2024-06-14 14:06:44,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2349, PETRI_PLACES=139, PETRI_TRANSITIONS=203} [2024-06-14 14:06:44,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-14 14:06:44,755 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 203 transitions, 2349 flow [2024-06-14 14:06:44,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:44,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:44,755 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 14:06:44,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:06:44,755 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:44,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:44,756 INFO L85 PathProgramCache]: Analyzing trace with hash 961240578, now seen corresponding path program 1 times [2024-06-14 14:06:44,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:44,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592098214] [2024-06-14 14:06:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:44,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:45,006 INFO 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 14:06:45,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:45,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592098214] [2024-06-14 14:06:45,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592098214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:45,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:45,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:45,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003524951] [2024-06-14 14:06:45,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:45,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:45,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:45,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:45,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:45,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:45,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 203 transitions, 2349 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:45,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:45,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:45,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:45,391 INFO L124 PetriNetUnfolderBase]: 1445/2427 cut-off events. [2024-06-14 14:06:45,392 INFO L125 PetriNetUnfolderBase]: For 57386/57386 co-relation queries the response was YES. [2024-06-14 14:06:45,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15821 conditions, 2427 events. 1445/2427 cut-off events. For 57386/57386 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13706 event pairs, 296 based on Foata normal form. 14/2431 useless extension candidates. Maximal degree in co-relation 15757. Up to 1848 conditions per place. [2024-06-14 14:06:45,410 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 160 selfloop transitions, 70 changer transitions 0/238 dead transitions. [2024-06-14 14:06:45,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 238 transitions, 3067 flow [2024-06-14 14:06:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-14 14:06:45,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2024-06-14 14:06:45,414 INFO L175 Difference]: Start difference. First operand has 139 places, 203 transitions, 2349 flow. Second operand 7 states and 192 transitions. [2024-06-14 14:06:45,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 238 transitions, 3067 flow [2024-06-14 14:06:45,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 238 transitions, 2812 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:45,469 INFO L231 Difference]: Finished difference. Result has 137 places, 206 transitions, 2318 flow [2024-06-14 14:06:45,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2318, PETRI_PLACES=137, PETRI_TRANSITIONS=206} [2024-06-14 14:06:45,470 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-14 14:06:45,470 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 206 transitions, 2318 flow [2024-06-14 14:06:45,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:45,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:45,470 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 14:06:45,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:06:45,471 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:45,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash -170340380, now seen corresponding path program 4 times [2024-06-14 14:06:45,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:45,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23280362] [2024-06-14 14:06:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:45,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:45,693 INFO 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 14:06:45,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:45,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23280362] [2024-06-14 14:06:45,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23280362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:45,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:45,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:45,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868553640] [2024-06-14 14:06:45,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:45,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:45,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:45,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:45,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:45,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 206 transitions, 2318 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:45,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:45,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:45,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:46,097 INFO L124 PetriNetUnfolderBase]: 1483/2504 cut-off events. [2024-06-14 14:06:46,097 INFO L125 PetriNetUnfolderBase]: For 59773/59773 co-relation queries the response was YES. [2024-06-14 14:06:46,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16090 conditions, 2504 events. 1483/2504 cut-off events. For 59773/59773 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14243 event pairs, 298 based on Foata normal form. 14/2514 useless extension candidates. Maximal degree in co-relation 16025. Up to 1888 conditions per place. [2024-06-14 14:06:46,115 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 171 selfloop transitions, 71 changer transitions 0/250 dead transitions. [2024-06-14 14:06:46,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 250 transitions, 3146 flow [2024-06-14 14:06:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-14 14:06:46,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-06-14 14:06:46,116 INFO L175 Difference]: Start difference. First operand has 137 places, 206 transitions, 2318 flow. Second operand 9 states and 240 transitions. [2024-06-14 14:06:46,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 250 transitions, 3146 flow [2024-06-14 14:06:46,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 250 transitions, 2966 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:46,186 INFO L231 Difference]: Finished difference. Result has 141 places, 209 transitions, 2373 flow [2024-06-14 14:06:46,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2373, PETRI_PLACES=141, PETRI_TRANSITIONS=209} [2024-06-14 14:06:46,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-14 14:06:46,187 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 209 transitions, 2373 flow [2024-06-14 14:06:46,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:46,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:46,187 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 14:06:46,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:06:46,188 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:46,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:46,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1601362446, now seen corresponding path program 4 times [2024-06-14 14:06:46,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:46,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463922262] [2024-06-14 14:06:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:46,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:46,346 INFO 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 14:06:46,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:46,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463922262] [2024-06-14 14:06:46,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463922262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:46,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:46,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:46,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905263932] [2024-06-14 14:06:46,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:46,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:46,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:46,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:46,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 209 transitions, 2373 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:46,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:46,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:46,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:46,743 INFO L124 PetriNetUnfolderBase]: 1562/2644 cut-off events. [2024-06-14 14:06:46,743 INFO L125 PetriNetUnfolderBase]: For 63929/63929 co-relation queries the response was YES. [2024-06-14 14:06:46,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17143 conditions, 2644 events. 1562/2644 cut-off events. For 63929/63929 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15312 event pairs, 300 based on Foata normal form. 4/2644 useless extension candidates. Maximal degree in co-relation 17077. Up to 1747 conditions per place. [2024-06-14 14:06:46,764 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 145 selfloop transitions, 124 changer transitions 0/277 dead transitions. [2024-06-14 14:06:46,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 277 transitions, 3691 flow [2024-06-14 14:06:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 297 transitions. [2024-06-14 14:06:46,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-14 14:06:46,766 INFO L175 Difference]: Start difference. First operand has 141 places, 209 transitions, 2373 flow. Second operand 11 states and 297 transitions. [2024-06-14 14:06:46,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 277 transitions, 3691 flow [2024-06-14 14:06:46,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 277 transitions, 3498 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:46,838 INFO L231 Difference]: Finished difference. Result has 145 places, 227 transitions, 2700 flow [2024-06-14 14:06:46,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2700, PETRI_PLACES=145, PETRI_TRANSITIONS=227} [2024-06-14 14:06:46,839 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-14 14:06:46,839 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 227 transitions, 2700 flow [2024-06-14 14:06:46,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:46,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:46,840 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 14:06:46,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:06:46,840 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:46,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:46,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1615906014, now seen corresponding path program 5 times [2024-06-14 14:06:46,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:46,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835809529] [2024-06-14 14:06:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:46,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:46,998 INFO 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 14:06:46,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:46,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835809529] [2024-06-14 14:06:46,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835809529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:46,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:46,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:46,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138606726] [2024-06-14 14:06:46,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:46,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:46,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:47,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:47,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:47,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:47,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 227 transitions, 2700 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:47,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:47,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:47,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:47,394 INFO L124 PetriNetUnfolderBase]: 1553/2632 cut-off events. [2024-06-14 14:06:47,394 INFO L125 PetriNetUnfolderBase]: For 65763/65763 co-relation queries the response was YES. [2024-06-14 14:06:47,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17208 conditions, 2632 events. 1553/2632 cut-off events. For 65763/65763 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15280 event pairs, 300 based on Foata normal form. 4/2632 useless extension candidates. Maximal degree in co-relation 17141. Up to 1741 conditions per place. [2024-06-14 14:06:47,415 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 136 selfloop transitions, 123 changer transitions 0/267 dead transitions. [2024-06-14 14:06:47,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 267 transitions, 3632 flow [2024-06-14 14:06:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-14 14:06:47,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382428940568475 [2024-06-14 14:06:47,418 INFO L175 Difference]: Start difference. First operand has 145 places, 227 transitions, 2700 flow. Second operand 9 states and 247 transitions. [2024-06-14 14:06:47,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 267 transitions, 3632 flow [2024-06-14 14:06:47,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 267 transitions, 3358 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:47,508 INFO L231 Difference]: Finished difference. Result has 148 places, 227 transitions, 2682 flow [2024-06-14 14:06:47,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2682, PETRI_PLACES=148, PETRI_TRANSITIONS=227} [2024-06-14 14:06:47,513 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-14 14:06:47,513 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 227 transitions, 2682 flow [2024-06-14 14:06:47,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:47,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:47,514 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 14:06:47,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:06:47,514 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:47,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:47,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1962558686, now seen corresponding path program 6 times [2024-06-14 14:06:47,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:47,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559285753] [2024-06-14 14:06:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:47,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:47,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:47,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559285753] [2024-06-14 14:06:47,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559285753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:47,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:47,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:47,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322643766] [2024-06-14 14:06:47,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:47,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:47,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:47,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:47,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:47,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 227 transitions, 2682 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:47,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:47,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:47,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:48,117 INFO L124 PetriNetUnfolderBase]: 1544/2620 cut-off events. [2024-06-14 14:06:48,118 INFO L125 PetriNetUnfolderBase]: For 66773/66773 co-relation queries the response was YES. [2024-06-14 14:06:48,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17175 conditions, 2620 events. 1544/2620 cut-off events. For 66773/66773 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15193 event pairs, 300 based on Foata normal form. 4/2620 useless extension candidates. Maximal degree in co-relation 17108. Up to 1735 conditions per place. [2024-06-14 14:06:48,137 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 138 selfloop transitions, 125 changer transitions 0/271 dead transitions. [2024-06-14 14:06:48,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 271 transitions, 3652 flow [2024-06-14 14:06:48,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-06-14 14:06:48,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6232558139534884 [2024-06-14 14:06:48,138 INFO L175 Difference]: Start difference. First operand has 148 places, 227 transitions, 2682 flow. Second operand 10 states and 268 transitions. [2024-06-14 14:06:48,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 271 transitions, 3652 flow [2024-06-14 14:06:48,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 271 transitions, 3364 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:48,213 INFO L231 Difference]: Finished difference. Result has 150 places, 227 transitions, 2654 flow [2024-06-14 14:06:48,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2654, PETRI_PLACES=150, PETRI_TRANSITIONS=227} [2024-06-14 14:06:48,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-14 14:06:48,214 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 227 transitions, 2654 flow [2024-06-14 14:06:48,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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 14:06:48,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:48,214 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 14:06:48,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:06:48,215 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:48,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1609230846, now seen corresponding path program 2 times [2024-06-14 14:06:48,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:48,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390689364] [2024-06-14 14:06:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:48,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:48,382 INFO 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 14:06:48,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:48,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390689364] [2024-06-14 14:06:48,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390689364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:48,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:48,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:48,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317860615] [2024-06-14 14:06:48,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:48,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:48,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:48,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:48,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:48,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:48,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 227 transitions, 2654 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:48,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:48,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:48,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:48,757 INFO L124 PetriNetUnfolderBase]: 1607/2716 cut-off events. [2024-06-14 14:06:48,757 INFO L125 PetriNetUnfolderBase]: For 75539/75539 co-relation queries the response was YES. [2024-06-14 14:06:48,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17818 conditions, 2716 events. 1607/2716 cut-off events. For 75539/75539 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15776 event pairs, 316 based on Foata normal form. 14/2726 useless extension candidates. Maximal degree in co-relation 17750. Up to 2088 conditions per place. [2024-06-14 14:06:48,777 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 188 selfloop transitions, 63 changer transitions 0/259 dead transitions. [2024-06-14 14:06:48,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 259 transitions, 3434 flow [2024-06-14 14:06:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 14:06:48,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312292358803987 [2024-06-14 14:06:48,779 INFO L175 Difference]: Start difference. First operand has 150 places, 227 transitions, 2654 flow. Second operand 7 states and 190 transitions. [2024-06-14 14:06:48,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 259 transitions, 3434 flow [2024-06-14 14:06:48,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 259 transitions, 3201 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:48,852 INFO L231 Difference]: Finished difference. Result has 149 places, 230 transitions, 2638 flow [2024-06-14 14:06:48,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2421, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2638, PETRI_PLACES=149, PETRI_TRANSITIONS=230} [2024-06-14 14:06:48,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-14 14:06:48,852 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 230 transitions, 2638 flow [2024-06-14 14:06:48,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:48,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:48,853 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 14:06:48,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:06:48,853 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:48,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:48,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1962549758, now seen corresponding path program 3 times [2024-06-14 14:06:48,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:48,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136634945] [2024-06-14 14:06:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:48,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:49,035 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 14:06:49,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:49,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136634945] [2024-06-14 14:06:49,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136634945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:49,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:49,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:49,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824555982] [2024-06-14 14:06:49,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:49,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:49,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:49,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:49,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:49,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 230 transitions, 2638 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:49,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:49,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:49,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:49,433 INFO L124 PetriNetUnfolderBase]: 1670/2827 cut-off events. [2024-06-14 14:06:49,433 INFO L125 PetriNetUnfolderBase]: For 80912/80912 co-relation queries the response was YES. [2024-06-14 14:06:49,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18407 conditions, 2827 events. 1670/2827 cut-off events. For 80912/80912 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16581 event pairs, 327 based on Foata normal form. 14/2837 useless extension candidates. Maximal degree in co-relation 18338. Up to 2189 conditions per place. [2024-06-14 14:06:49,457 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 63 changer transitions 0/263 dead transitions. [2024-06-14 14:06:49,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 263 transitions, 3498 flow [2024-06-14 14:06:49,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 14:06:49,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312292358803987 [2024-06-14 14:06:49,459 INFO L175 Difference]: Start difference. First operand has 149 places, 230 transitions, 2638 flow. Second operand 7 states and 190 transitions. [2024-06-14 14:06:49,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 263 transitions, 3498 flow [2024-06-14 14:06:49,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 263 transitions, 3323 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:49,561 INFO L231 Difference]: Finished difference. Result has 151 places, 233 transitions, 2686 flow [2024-06-14 14:06:49,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2686, PETRI_PLACES=151, PETRI_TRANSITIONS=233} [2024-06-14 14:06:49,562 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-14 14:06:49,562 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 233 transitions, 2686 flow [2024-06-14 14:06:49,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:49,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:49,562 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 14:06:49,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:06:49,563 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:49,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:49,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1952074238, now seen corresponding path program 4 times [2024-06-14 14:06:49,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:49,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908065085] [2024-06-14 14:06:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:49,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:49,841 INFO 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 14:06:49,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:49,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908065085] [2024-06-14 14:06:49,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908065085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:49,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:49,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:49,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130058422] [2024-06-14 14:06:49,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:49,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:49,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:49,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:49,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:49,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:49,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 233 transitions, 2686 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:49,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:49,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:49,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:50,273 INFO L124 PetriNetUnfolderBase]: 1800/3065 cut-off events. [2024-06-14 14:06:50,274 INFO L125 PetriNetUnfolderBase]: For 92579/92579 co-relation queries the response was YES. [2024-06-14 14:06:50,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19939 conditions, 3065 events. 1800/3065 cut-off events. For 92579/92579 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18427 event pairs, 322 based on Foata normal form. 14/3075 useless extension candidates. Maximal degree in co-relation 19869. Up to 2024 conditions per place. [2024-06-14 14:06:50,299 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 195 selfloop transitions, 70 changer transitions 0/273 dead transitions. [2024-06-14 14:06:50,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 273 transitions, 3690 flow [2024-06-14 14:06:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-14 14:06:50,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445182724252492 [2024-06-14 14:06:50,301 INFO L175 Difference]: Start difference. First operand has 151 places, 233 transitions, 2686 flow. Second operand 7 states and 194 transitions. [2024-06-14 14:06:50,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 273 transitions, 3690 flow [2024-06-14 14:06:50,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 273 transitions, 3509 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:50,392 INFO L231 Difference]: Finished difference. Result has 154 places, 238 transitions, 2795 flow [2024-06-14 14:06:50,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2795, PETRI_PLACES=154, PETRI_TRANSITIONS=238} [2024-06-14 14:06:50,393 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-14 14:06:50,394 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 238 transitions, 2795 flow [2024-06-14 14:06:50,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:50,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:50,394 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 14:06:50,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:06:50,395 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 14:06:50,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:50,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1002815492, now seen corresponding path program 1 times [2024-06-14 14:06:50,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:50,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307129033] [2024-06-14 14:06:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:50,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:50,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:50,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307129033] [2024-06-14 14:06:50,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307129033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:50,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:50,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986293250] [2024-06-14 14:06:50,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:50,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:50,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:50,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:50,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 238 transitions, 2795 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 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 14:06:50,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:50,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:50,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:50,936 INFO L124 PetriNetUnfolderBase]: 1810/3077 cut-off events. [2024-06-14 14:06:50,936 INFO L125 PetriNetUnfolderBase]: For 91584/91584 co-relation queries the response was YES. [2024-06-14 14:06:50,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20590 conditions, 3077 events. 1810/3077 cut-off events. For 91584/91584 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18528 event pairs, 392 based on Foata normal form. 2/3070 useless extension candidates. Maximal degree in co-relation 20518. Up to 2600 conditions per place. [2024-06-14 14:06:50,959 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 204 selfloop transitions, 40 changer transitions 0/252 dead transitions. [2024-06-14 14:06:50,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 252 transitions, 3433 flow [2024-06-14 14:06:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 14:06:50,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906976744186047 [2024-06-14 14:06:50,965 INFO L175 Difference]: Start difference. First operand has 154 places, 238 transitions, 2795 flow. Second operand 5 states and 127 transitions. [2024-06-14 14:06:50,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 252 transitions, 3433 flow [2024-06-14 14:06:51,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 252 transitions, 3284 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:51,084 INFO L231 Difference]: Finished difference. Result has 156 places, 242 transitions, 2795 flow [2024-06-14 14:06:51,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2795, PETRI_PLACES=156, PETRI_TRANSITIONS=242} [2024-06-14 14:06:51,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-14 14:06:51,084 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 242 transitions, 2795 flow [2024-06-14 14:06:51,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 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 14:06:51,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:51,085 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 14:06:51,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:06:51,085 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 14:06:51,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:51,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1040978972, now seen corresponding path program 2 times [2024-06-14 14:06:51,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:51,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576008405] [2024-06-14 14:06:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:51,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:51,244 INFO 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 14:06:51,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:51,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576008405] [2024-06-14 14:06:51,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576008405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:51,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:51,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:51,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620293438] [2024-06-14 14:06:51,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:51,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:51,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:51,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:51,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:51,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:51,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 242 transitions, 2795 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 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 14:06:51,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:51,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:51,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:51,586 INFO L124 PetriNetUnfolderBase]: 1774/3020 cut-off events. [2024-06-14 14:06:51,586 INFO L125 PetriNetUnfolderBase]: For 91742/91742 co-relation queries the response was YES. [2024-06-14 14:06:51,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20145 conditions, 3020 events. 1774/3020 cut-off events. For 91742/91742 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18090 event pairs, 374 based on Foata normal form. 2/3018 useless extension candidates. Maximal degree in co-relation 20071. Up to 2544 conditions per place. [2024-06-14 14:06:51,611 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 204 selfloop transitions, 42 changer transitions 0/254 dead transitions. [2024-06-14 14:06:51,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 254 transitions, 3317 flow [2024-06-14 14:06:51,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 14:06:51,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-14 14:06:51,613 INFO L175 Difference]: Start difference. First operand has 156 places, 242 transitions, 2795 flow. Second operand 5 states and 130 transitions. [2024-06-14 14:06:51,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 254 transitions, 3317 flow [2024-06-14 14:06:51,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 254 transitions, 3223 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:51,701 INFO L231 Difference]: Finished difference. Result has 158 places, 242 transitions, 2795 flow [2024-06-14 14:06:51,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2795, PETRI_PLACES=158, PETRI_TRANSITIONS=242} [2024-06-14 14:06:51,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-14 14:06:51,702 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 242 transitions, 2795 flow [2024-06-14 14:06:51,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 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 14:06:51,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:51,703 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 14:06:51,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:06:51,703 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 14:06:51,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1002825412, now seen corresponding path program 1 times [2024-06-14 14:06:51,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:51,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333368312] [2024-06-14 14:06:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:51,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:51,882 INFO 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 14:06:51,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:51,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333368312] [2024-06-14 14:06:51,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333368312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:51,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:51,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:51,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288347996] [2024-06-14 14:06:51,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:51,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:51,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:51,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:51,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:51,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 242 transitions, 2795 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:51,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:51,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:51,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:52,299 INFO L124 PetriNetUnfolderBase]: 1793/3035 cut-off events. [2024-06-14 14:06:52,299 INFO L125 PetriNetUnfolderBase]: For 99207/99207 co-relation queries the response was YES. [2024-06-14 14:06:52,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20393 conditions, 3035 events. 1793/3035 cut-off events. For 99207/99207 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18087 event pairs, 382 based on Foata normal form. 8/3034 useless extension candidates. Maximal degree in co-relation 20319. Up to 2549 conditions per place. [2024-06-14 14:06:52,340 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 203 selfloop transitions, 46 changer transitions 0/257 dead transitions. [2024-06-14 14:06:52,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 257 transitions, 3381 flow [2024-06-14 14:06:52,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:06:52,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775193798449613 [2024-06-14 14:06:52,342 INFO L175 Difference]: Start difference. First operand has 158 places, 242 transitions, 2795 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:06:52,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 257 transitions, 3381 flow [2024-06-14 14:06:52,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 257 transitions, 3264 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:52,453 INFO L231 Difference]: Finished difference. Result has 159 places, 246 transitions, 2847 flow [2024-06-14 14:06:52,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2847, PETRI_PLACES=159, PETRI_TRANSITIONS=246} [2024-06-14 14:06:52,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-14 14:06:52,453 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 246 transitions, 2847 flow [2024-06-14 14:06:52,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:52,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:52,454 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 14:06:52,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:06:52,454 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 14:06:52,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:52,454 INFO L85 PathProgramCache]: Analyzing trace with hash 288049425, now seen corresponding path program 1 times [2024-06-14 14:06:52,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:52,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173681360] [2024-06-14 14:06:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:52,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:52,681 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 14:06:52,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:52,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173681360] [2024-06-14 14:06:52,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173681360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:52,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:52,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:52,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167820732] [2024-06-14 14:06:52,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:52,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:52,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:52,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:52,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:52,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:52,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 246 transitions, 2847 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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 14:06:52,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:52,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:52,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:53,124 INFO L124 PetriNetUnfolderBase]: 1780/3032 cut-off events. [2024-06-14 14:06:53,125 INFO L125 PetriNetUnfolderBase]: For 98792/98792 co-relation queries the response was YES. [2024-06-14 14:06:53,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20520 conditions, 3032 events. 1780/3032 cut-off events. For 98792/98792 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18105 event pairs, 350 based on Foata normal form. 2/3032 useless extension candidates. Maximal degree in co-relation 20445. Up to 2611 conditions per place. [2024-06-14 14:06:53,148 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 232 selfloop transitions, 25 changer transitions 0/265 dead transitions. [2024-06-14 14:06:53,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 265 transitions, 3409 flow [2024-06-14 14:06:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 14:06:53,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 14:06:53,150 INFO L175 Difference]: Start difference. First operand has 159 places, 246 transitions, 2847 flow. Second operand 6 states and 152 transitions. [2024-06-14 14:06:53,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 265 transitions, 3409 flow [2024-06-14 14:06:53,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 265 transitions, 3260 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:53,294 INFO L231 Difference]: Finished difference. Result has 161 places, 246 transitions, 2762 flow [2024-06-14 14:06:53,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2698, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2762, PETRI_PLACES=161, PETRI_TRANSITIONS=246} [2024-06-14 14:06:53,294 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-14 14:06:53,294 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 246 transitions, 2762 flow [2024-06-14 14:06:53,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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 14:06:53,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:53,295 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 14:06:53,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:06:53,295 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 14:06:53,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:53,295 INFO L85 PathProgramCache]: Analyzing trace with hash -273475509, now seen corresponding path program 2 times [2024-06-14 14:06:53,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:53,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634335743] [2024-06-14 14:06:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:53,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:53,493 INFO 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 14:06:53,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:53,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634335743] [2024-06-14 14:06:53,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634335743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:53,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:53,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:53,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684145765] [2024-06-14 14:06:53,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:53,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:53,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:53,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:53,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:53,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:53,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 246 transitions, 2762 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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 14:06:53,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:53,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:53,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:53,949 INFO L124 PetriNetUnfolderBase]: 1798/3059 cut-off events. [2024-06-14 14:06:53,949 INFO L125 PetriNetUnfolderBase]: For 103253/103253 co-relation queries the response was YES. [2024-06-14 14:06:53,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20573 conditions, 3059 events. 1798/3059 cut-off events. For 103253/103253 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18293 event pairs, 358 based on Foata normal form. 2/3054 useless extension candidates. Maximal degree in co-relation 20497. Up to 2429 conditions per place. [2024-06-14 14:06:53,976 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 188 selfloop transitions, 85 changer transitions 0/281 dead transitions. [2024-06-14 14:06:53,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 281 transitions, 3682 flow [2024-06-14 14:06:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:53,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-14 14:06:53,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788113695090439 [2024-06-14 14:06:53,978 INFO L175 Difference]: Start difference. First operand has 161 places, 246 transitions, 2762 flow. Second operand 9 states and 224 transitions. [2024-06-14 14:06:53,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 281 transitions, 3682 flow [2024-06-14 14:06:54,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 281 transitions, 3644 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:54,115 INFO L231 Difference]: Finished difference. Result has 166 places, 253 transitions, 2994 flow [2024-06-14 14:06:54,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2724, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2994, PETRI_PLACES=166, PETRI_TRANSITIONS=253} [2024-06-14 14:06:54,116 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-14 14:06:54,116 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 253 transitions, 2994 flow [2024-06-14 14:06:54,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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 14:06:54,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:54,116 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 14:06:54,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:06:54,116 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 14:06:54,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:54,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1007549231, now seen corresponding path program 3 times [2024-06-14 14:06:54,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:54,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743263542] [2024-06-14 14:06:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:54,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:54,353 INFO 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 14:06:54,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:54,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743263542] [2024-06-14 14:06:54,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743263542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:54,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:54,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:54,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092300999] [2024-06-14 14:06:54,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:54,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:54,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:54,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:54,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:54,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:54,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 253 transitions, 2994 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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 14:06:54,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:54,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:54,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:54,854 INFO L124 PetriNetUnfolderBase]: 1786/3029 cut-off events. [2024-06-14 14:06:54,854 INFO L125 PetriNetUnfolderBase]: For 107509/107509 co-relation queries the response was YES. [2024-06-14 14:06:54,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20715 conditions, 3029 events. 1786/3029 cut-off events. For 107509/107509 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18060 event pairs, 371 based on Foata normal form. 4/3024 useless extension candidates. Maximal degree in co-relation 20638. Up to 2421 conditions per place. [2024-06-14 14:06:54,885 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 189 selfloop transitions, 76 changer transitions 0/273 dead transitions. [2024-06-14 14:06:54,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 273 transitions, 3720 flow [2024-06-14 14:06:54,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 14:06:54,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 14:06:54,886 INFO L175 Difference]: Start difference. First operand has 166 places, 253 transitions, 2994 flow. Second operand 8 states and 200 transitions. [2024-06-14 14:06:54,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 273 transitions, 3720 flow [2024-06-14 14:06:55,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 273 transitions, 3580 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:55,049 INFO L231 Difference]: Finished difference. Result has 169 places, 253 transitions, 3014 flow [2024-06-14 14:06:55,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3014, PETRI_PLACES=169, PETRI_TRANSITIONS=253} [2024-06-14 14:06:55,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-14 14:06:55,049 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 253 transitions, 3014 flow [2024-06-14 14:06:55,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 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 14:06:55,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:55,050 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 14:06:55,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:06:55,050 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 14:06:55,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:55,050 INFO L85 PathProgramCache]: Analyzing trace with hash 39774403, now seen corresponding path program 1 times [2024-06-14 14:06:55,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:55,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846127078] [2024-06-14 14:06:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:55,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:55,215 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 14:06:55,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:55,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846127078] [2024-06-14 14:06:55,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846127078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:55,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:55,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:55,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126325752] [2024-06-14 14:06:55,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:55,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:55,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:55,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:55,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:55,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:55,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 253 transitions, 3014 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:55,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:55,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:55,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:55,601 INFO L124 PetriNetUnfolderBase]: 1791/3050 cut-off events. [2024-06-14 14:06:55,602 INFO L125 PetriNetUnfolderBase]: For 109988/109988 co-relation queries the response was YES. [2024-06-14 14:06:55,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20925 conditions, 3050 events. 1791/3050 cut-off events. For 109988/109988 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18189 event pairs, 349 based on Foata normal form. 1/3049 useless extension candidates. Maximal degree in co-relation 20847. Up to 2656 conditions per place. [2024-06-14 14:06:55,631 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 245 selfloop transitions, 20 changer transitions 0/273 dead transitions. [2024-06-14 14:06:55,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 273 transitions, 3694 flow [2024-06-14 14:06:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 14:06:55,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 14:06:55,632 INFO L175 Difference]: Start difference. First operand has 169 places, 253 transitions, 3014 flow. Second operand 6 states and 150 transitions. [2024-06-14 14:06:55,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 273 transitions, 3694 flow [2024-06-14 14:06:55,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 273 transitions, 3462 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:55,767 INFO L231 Difference]: Finished difference. Result has 167 places, 256 transitions, 2860 flow [2024-06-14 14:06:55,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2782, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2860, PETRI_PLACES=167, PETRI_TRANSITIONS=256} [2024-06-14 14:06:55,768 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-14 14:06:55,768 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 256 transitions, 2860 flow [2024-06-14 14:06:55,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:55,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:55,768 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 14:06:55,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:06:55,769 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 14:06:55,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:55,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1219435345, now seen corresponding path program 2 times [2024-06-14 14:06:55,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:55,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526691023] [2024-06-14 14:06:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:55,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:55,961 INFO 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 14:06:55,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:55,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526691023] [2024-06-14 14:06:55,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526691023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:55,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:55,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:55,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584129844] [2024-06-14 14:06:55,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:55,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:55,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:55,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:55,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:55,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:55,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 256 transitions, 2860 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 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 14:06:55,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:55,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:55,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:56,311 INFO L124 PetriNetUnfolderBase]: 1788/3038 cut-off events. [2024-06-14 14:06:56,311 INFO L125 PetriNetUnfolderBase]: For 112875/112875 co-relation queries the response was YES. [2024-06-14 14:06:56,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20622 conditions, 3038 events. 1788/3038 cut-off events. For 112875/112875 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18118 event pairs, 355 based on Foata normal form. 1/3032 useless extension candidates. Maximal degree in co-relation 20543. Up to 2653 conditions per place. [2024-06-14 14:06:56,337 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 237 selfloop transitions, 20 changer transitions 0/265 dead transitions. [2024-06-14 14:06:56,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 265 transitions, 3396 flow [2024-06-14 14:06:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 14:06:56,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767441860465117 [2024-06-14 14:06:56,338 INFO L175 Difference]: Start difference. First operand has 167 places, 256 transitions, 2860 flow. Second operand 5 states and 124 transitions. [2024-06-14 14:06:56,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 265 transitions, 3396 flow [2024-06-14 14:06:56,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 265 transitions, 3346 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:56,489 INFO L231 Difference]: Finished difference. Result has 168 places, 256 transitions, 2856 flow [2024-06-14 14:06:56,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2810, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2856, PETRI_PLACES=168, PETRI_TRANSITIONS=256} [2024-06-14 14:06:56,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-14 14:06:56,490 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 256 transitions, 2856 flow [2024-06-14 14:06:56,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 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 14:06:56,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:56,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:56,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:06:56,490 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:56,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:56,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1754466357, now seen corresponding path program 1 times [2024-06-14 14:06:56,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:56,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482473830] [2024-06-14 14:06:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:56,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:56,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:56,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482473830] [2024-06-14 14:06:56,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482473830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:56,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:56,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:56,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074107243] [2024-06-14 14:06:56,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:56,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:56,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:56,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:56,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:56,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:56,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 256 transitions, 2856 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:56,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:56,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:56,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:57,305 INFO L124 PetriNetUnfolderBase]: 2009/3395 cut-off events. [2024-06-14 14:06:57,306 INFO L125 PetriNetUnfolderBase]: For 155759/155759 co-relation queries the response was YES. [2024-06-14 14:06:57,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24289 conditions, 3395 events. 2009/3395 cut-off events. For 155759/155759 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20691 event pairs, 307 based on Foata normal form. 18/3405 useless extension candidates. Maximal degree in co-relation 24209. Up to 2448 conditions per place. [2024-06-14 14:06:57,340 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 254 selfloop transitions, 42 changer transitions 0/304 dead transitions. [2024-06-14 14:06:57,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 304 transitions, 3989 flow [2024-06-14 14:06:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 14:06:57,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6162790697674418 [2024-06-14 14:06:57,353 INFO L175 Difference]: Start difference. First operand has 168 places, 256 transitions, 2856 flow. Second operand 8 states and 212 transitions. [2024-06-14 14:06:57,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 304 transitions, 3989 flow [2024-06-14 14:06:57,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 304 transitions, 3933 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:57,543 INFO L231 Difference]: Finished difference. Result has 173 places, 262 transitions, 3075 flow [2024-06-14 14:06:57,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3075, PETRI_PLACES=173, PETRI_TRANSITIONS=262} [2024-06-14 14:06:57,543 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-14 14:06:57,544 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 262 transitions, 3075 flow [2024-06-14 14:06:57,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:57,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:57,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:57,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:06:57,544 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:57,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:57,545 INFO L85 PathProgramCache]: Analyzing trace with hash 991072203, now seen corresponding path program 2 times [2024-06-14 14:06:57,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:57,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538367356] [2024-06-14 14:06:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:57,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:57,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538367356] [2024-06-14 14:06:57,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538367356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:57,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:57,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:57,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966837074] [2024-06-14 14:06:57,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:57,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:57,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:57,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:57,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:57,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:57,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 262 transitions, 3075 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:57,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:57,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:57,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:58,300 INFO L124 PetriNetUnfolderBase]: 2116/3594 cut-off events. [2024-06-14 14:06:58,300 INFO L125 PetriNetUnfolderBase]: For 176856/176856 co-relation queries the response was YES. [2024-06-14 14:06:58,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26636 conditions, 3594 events. 2116/3594 cut-off events. For 176856/176856 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22183 event pairs, 421 based on Foata normal form. 18/3608 useless extension candidates. Maximal degree in co-relation 26555. Up to 2800 conditions per place. [2024-06-14 14:06:58,333 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 250 selfloop transitions, 45 changer transitions 0/303 dead transitions. [2024-06-14 14:06:58,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 303 transitions, 4169 flow [2024-06-14 14:06:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 14:06:58,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075581395348837 [2024-06-14 14:06:58,336 INFO L175 Difference]: Start difference. First operand has 173 places, 262 transitions, 3075 flow. Second operand 8 states and 209 transitions. [2024-06-14 14:06:58,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 303 transitions, 4169 flow [2024-06-14 14:06:58,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 303 transitions, 4044 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:58,567 INFO L231 Difference]: Finished difference. Result has 177 places, 266 transitions, 3221 flow [2024-06-14 14:06:58,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3221, PETRI_PLACES=177, PETRI_TRANSITIONS=266} [2024-06-14 14:06:58,569 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 14:06:58,570 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 266 transitions, 3221 flow [2024-06-14 14:06:58,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:58,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:58,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:58,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 14:06:58,574 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:58,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1176704639, now seen corresponding path program 3 times [2024-06-14 14:06:58,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:58,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587277387] [2024-06-14 14:06:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:58,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:58,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:58,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587277387] [2024-06-14 14:06:58,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587277387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:58,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:58,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:58,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817409551] [2024-06-14 14:06:58,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:58,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:58,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:58,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:58,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:58,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:58,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 266 transitions, 3221 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:58,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:58,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:58,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:59,420 INFO L124 PetriNetUnfolderBase]: 2070/3524 cut-off events. [2024-06-14 14:06:59,420 INFO L125 PetriNetUnfolderBase]: For 169701/169701 co-relation queries the response was YES. [2024-06-14 14:06:59,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25039 conditions, 3524 events. 2070/3524 cut-off events. For 169701/169701 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21726 event pairs, 418 based on Foata normal form. 24/3544 useless extension candidates. Maximal degree in co-relation 24956. Up to 2901 conditions per place. [2024-06-14 14:06:59,449 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 248 selfloop transitions, 42 changer transitions 0/298 dead transitions. [2024-06-14 14:06:59,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 298 transitions, 3979 flow [2024-06-14 14:06:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 14:06:59,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-14 14:06:59,450 INFO L175 Difference]: Start difference. First operand has 177 places, 266 transitions, 3221 flow. Second operand 8 states and 205 transitions. [2024-06-14 14:06:59,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 298 transitions, 3979 flow [2024-06-14 14:06:59,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 298 transitions, 3813 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:59,698 INFO L231 Difference]: Finished difference. Result has 181 places, 266 transitions, 3151 flow [2024-06-14 14:06:59,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3151, PETRI_PLACES=181, PETRI_TRANSITIONS=266} [2024-06-14 14:06:59,698 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-14 14:06:59,699 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 266 transitions, 3151 flow [2024-06-14 14:06:59,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:59,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:59,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:59,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 14:06:59,699 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:59,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:59,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2051039965, now seen corresponding path program 4 times [2024-06-14 14:06:59,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:59,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825742848] [2024-06-14 14:06:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:59,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:59,880 INFO 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 14:06:59,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:59,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825742848] [2024-06-14 14:06:59,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825742848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:59,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:59,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:59,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453386031] [2024-06-14 14:06:59,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:59,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:59,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:59,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:59,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:59,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:06:59,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 266 transitions, 3151 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:59,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:59,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:06:59,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:00,529 INFO L124 PetriNetUnfolderBase]: 2232/3795 cut-off events. [2024-06-14 14:07:00,529 INFO L125 PetriNetUnfolderBase]: For 203928/203928 co-relation queries the response was YES. [2024-06-14 14:07:00,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26097 conditions, 3795 events. 2232/3795 cut-off events. For 203928/203928 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23685 event pairs, 474 based on Foata normal form. 50/3834 useless extension candidates. Maximal degree in co-relation 26012. Up to 2589 conditions per place. [2024-06-14 14:07:00,564 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 164 selfloop transitions, 146 changer transitions 3/321 dead transitions. [2024-06-14 14:07:00,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 321 transitions, 4445 flow [2024-06-14 14:07:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 297 transitions. [2024-06-14 14:07:00,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-14 14:07:00,565 INFO L175 Difference]: Start difference. First operand has 181 places, 266 transitions, 3151 flow. Second operand 11 states and 297 transitions. [2024-06-14 14:07:00,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 321 transitions, 4445 flow [2024-06-14 14:07:00,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 321 transitions, 4353 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:00,767 INFO L231 Difference]: Finished difference. Result has 185 places, 267 transitions, 3440 flow [2024-06-14 14:07:00,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3059, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3440, PETRI_PLACES=185, PETRI_TRANSITIONS=267} [2024-06-14 14:07:00,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-14 14:07:00,768 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 267 transitions, 3440 flow [2024-06-14 14:07:00,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:00,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:00,768 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 14:07:00,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 14:07:00,769 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:00,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:00,769 INFO L85 PathProgramCache]: Analyzing trace with hash 382154699, now seen corresponding path program 5 times [2024-06-14 14:07:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:00,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554788516] [2024-06-14 14:07:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:00,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:00,953 INFO 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 14:07:00,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:00,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554788516] [2024-06-14 14:07:00,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554788516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:00,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:00,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:00,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146025864] [2024-06-14 14:07:00,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:00,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:00,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:00,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:00,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:01,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:01,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 267 transitions, 3440 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:01,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:01,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:01,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:01,634 INFO L124 PetriNetUnfolderBase]: 2610/4447 cut-off events. [2024-06-14 14:07:01,634 INFO L125 PetriNetUnfolderBase]: For 266783/266783 co-relation queries the response was YES. [2024-06-14 14:07:01,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32345 conditions, 4447 events. 2610/4447 cut-off events. For 266783/266783 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28533 event pairs, 586 based on Foata normal form. 42/4478 useless extension candidates. Maximal degree in co-relation 32259. Up to 2555 conditions per place. [2024-06-14 14:07:01,675 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 169 selfloop transitions, 151 changer transitions 4/332 dead transitions. [2024-06-14 14:07:01,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 332 transitions, 5052 flow [2024-06-14 14:07:01,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 303 transitions. [2024-06-14 14:07:01,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6405919661733616 [2024-06-14 14:07:01,677 INFO L175 Difference]: Start difference. First operand has 185 places, 267 transitions, 3440 flow. Second operand 11 states and 303 transitions. [2024-06-14 14:07:01,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 332 transitions, 5052 flow [2024-06-14 14:07:02,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 332 transitions, 4696 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:02,014 INFO L231 Difference]: Finished difference. Result has 187 places, 270 transitions, 3566 flow [2024-06-14 14:07:02,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3084, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3566, PETRI_PLACES=187, PETRI_TRANSITIONS=270} [2024-06-14 14:07:02,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-14 14:07:02,015 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 270 transitions, 3566 flow [2024-06-14 14:07:02,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:02,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:02,015 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 14:07:02,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 14:07:02,015 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:02,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1796761653, now seen corresponding path program 6 times [2024-06-14 14:07:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:02,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189894946] [2024-06-14 14:07:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:02,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:02,196 INFO 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 14:07:02,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:02,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189894946] [2024-06-14 14:07:02,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189894946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:02,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:02,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:02,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548833409] [2024-06-14 14:07:02,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:02,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:02,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:02,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:02,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 270 transitions, 3566 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:02,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:02,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:02,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:02,914 INFO L124 PetriNetUnfolderBase]: 2483/4244 cut-off events. [2024-06-14 14:07:02,914 INFO L125 PetriNetUnfolderBase]: For 231860/231860 co-relation queries the response was YES. [2024-06-14 14:07:02,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29051 conditions, 4244 events. 2483/4244 cut-off events. For 231860/231860 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27098 event pairs, 596 based on Foata normal form. 50/4283 useless extension candidates. Maximal degree in co-relation 28964. Up to 3018 conditions per place. [2024-06-14 14:07:02,947 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 169 selfloop transitions, 148 changer transitions 3/328 dead transitions. [2024-06-14 14:07:02,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 328 transitions, 4910 flow [2024-06-14 14:07:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:02,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 319 transitions. [2024-06-14 14:07:02,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182170542635659 [2024-06-14 14:07:02,949 INFO L175 Difference]: Start difference. First operand has 187 places, 270 transitions, 3566 flow. Second operand 12 states and 319 transitions. [2024-06-14 14:07:02,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 328 transitions, 4910 flow [2024-06-14 14:07:03,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 328 transitions, 4482 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:03,230 INFO L231 Difference]: Finished difference. Result has 191 places, 269 transitions, 3434 flow [2024-06-14 14:07:03,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3434, PETRI_PLACES=191, PETRI_TRANSITIONS=269} [2024-06-14 14:07:03,230 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 14:07:03,231 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 269 transitions, 3434 flow [2024-06-14 14:07:03,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:03,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:03,231 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 14:07:03,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 14:07:03,231 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:03,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:03,232 INFO L85 PathProgramCache]: Analyzing trace with hash 334245025, now seen corresponding path program 1 times [2024-06-14 14:07:03,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:03,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822921217] [2024-06-14 14:07:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:03,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:03,404 INFO 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 14:07:03,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:03,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822921217] [2024-06-14 14:07:03,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822921217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:03,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:03,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:03,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096927124] [2024-06-14 14:07:03,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:03,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:03,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:03,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:03,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:03,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 269 transitions, 3434 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:03,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:03,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:03,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:04,177 INFO L124 PetriNetUnfolderBase]: 2775/4742 cut-off events. [2024-06-14 14:07:04,178 INFO L125 PetriNetUnfolderBase]: For 267399/267399 co-relation queries the response was YES. [2024-06-14 14:07:04,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32333 conditions, 4742 events. 2775/4742 cut-off events. For 267399/267399 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 30927 event pairs, 630 based on Foata normal form. 42/4771 useless extension candidates. Maximal degree in co-relation 32245. Up to 2587 conditions per place. [2024-06-14 14:07:04,222 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 166 selfloop transitions, 159 changer transitions 4/337 dead transitions. [2024-06-14 14:07:04,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 337 transitions, 5068 flow [2024-06-14 14:07:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 324 transitions. [2024-06-14 14:07:04,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-14 14:07:04,223 INFO L175 Difference]: Start difference. First operand has 191 places, 269 transitions, 3434 flow. Second operand 12 states and 324 transitions. [2024-06-14 14:07:04,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 337 transitions, 5068 flow [2024-06-14 14:07:04,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 337 transitions, 4712 flow, removed 26 selfloop flow, removed 11 redundant places. [2024-06-14 14:07:04,526 INFO L231 Difference]: Finished difference. Result has 192 places, 271 transitions, 3532 flow [2024-06-14 14:07:04,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3532, PETRI_PLACES=192, PETRI_TRANSITIONS=271} [2024-06-14 14:07:04,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-14 14:07:04,527 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 271 transitions, 3532 flow [2024-06-14 14:07:04,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:04,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:04,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:04,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 14:07:04,527 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 14:07:04,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash 826499137, now seen corresponding path program 1 times [2024-06-14 14:07:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:04,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552484592] [2024-06-14 14:07:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:04,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:04,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:04,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552484592] [2024-06-14 14:07:04,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552484592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:04,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:04,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:04,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199387716] [2024-06-14 14:07:04,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:04,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:04,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:04,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:04,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:04,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:04,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 271 transitions, 3532 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:04,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:04,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:04,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:05,338 INFO L124 PetriNetUnfolderBase]: 2763/4724 cut-off events. [2024-06-14 14:07:05,339 INFO L125 PetriNetUnfolderBase]: For 233732/233732 co-relation queries the response was YES. [2024-06-14 14:07:05,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32000 conditions, 4724 events. 2763/4724 cut-off events. For 233732/233732 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30783 event pairs, 751 based on Foata normal form. 2/4720 useless extension candidates. Maximal degree in co-relation 31911. Up to 4141 conditions per place. [2024-06-14 14:07:05,383 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 224 selfloop transitions, 60 changer transitions 0/292 dead transitions. [2024-06-14 14:07:05,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 292 transitions, 4307 flow [2024-06-14 14:07:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 14:07:05,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007751937984496 [2024-06-14 14:07:05,384 INFO L175 Difference]: Start difference. First operand has 192 places, 271 transitions, 3532 flow. Second operand 6 states and 155 transitions. [2024-06-14 14:07:05,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 292 transitions, 4307 flow [2024-06-14 14:07:05,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 292 transitions, 3997 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:05,751 INFO L231 Difference]: Finished difference. Result has 191 places, 278 transitions, 3484 flow [2024-06-14 14:07:05,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3226, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3484, PETRI_PLACES=191, PETRI_TRANSITIONS=278} [2024-06-14 14:07:05,751 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 14:07:05,751 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 278 transitions, 3484 flow [2024-06-14 14:07:05,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:05,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:05,752 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 14:07:05,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 14:07:05,752 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 14:07:05,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash 351979045, now seen corresponding path program 2 times [2024-06-14 14:07:05,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:05,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82878056] [2024-06-14 14:07:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:05,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:05,950 INFO 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 14:07:05,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:05,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82878056] [2024-06-14 14:07:05,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82878056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:05,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:05,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:05,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758314893] [2024-06-14 14:07:05,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:05,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:05,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:05,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:05,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:05,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 278 transitions, 3484 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:05,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:05,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:05,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:06,623 INFO L124 PetriNetUnfolderBase]: 2773/4732 cut-off events. [2024-06-14 14:07:06,623 INFO L125 PetriNetUnfolderBase]: For 234870/234870 co-relation queries the response was YES. [2024-06-14 14:07:06,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31871 conditions, 4732 events. 2773/4732 cut-off events. For 234870/234870 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30817 event pairs, 763 based on Foata normal form. 2/4725 useless extension candidates. Maximal degree in co-relation 31779. Up to 4048 conditions per place. [2024-06-14 14:07:06,675 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 205 selfloop transitions, 91 changer transitions 0/304 dead transitions. [2024-06-14 14:07:06,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 304 transitions, 4471 flow [2024-06-14 14:07:06,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:06,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-14 14:07:06,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684754521963824 [2024-06-14 14:07:06,685 INFO L175 Difference]: Start difference. First operand has 191 places, 278 transitions, 3484 flow. Second operand 9 states and 220 transitions. [2024-06-14 14:07:06,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 304 transitions, 4471 flow [2024-06-14 14:07:07,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 304 transitions, 4369 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:07,028 INFO L231 Difference]: Finished difference. Result has 196 places, 282 transitions, 3632 flow [2024-06-14 14:07:07,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3632, PETRI_PLACES=196, PETRI_TRANSITIONS=282} [2024-06-14 14:07:07,029 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-14 14:07:07,029 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 282 transitions, 3632 flow [2024-06-14 14:07:07,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:07,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:07,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:07,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 14:07:07,029 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 14:07:07,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:07,030 INFO L85 PathProgramCache]: Analyzing trace with hash 351563335, now seen corresponding path program 3 times [2024-06-14 14:07:07,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:07,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490182030] [2024-06-14 14:07:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:07,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:07,228 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 14:07:07,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:07,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490182030] [2024-06-14 14:07:07,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490182030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:07,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:07,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:07,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118932451] [2024-06-14 14:07:07,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:07,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:07,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:07,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:07,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:07,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:07,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 282 transitions, 3632 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:07,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:07,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:07,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:07,956 INFO L124 PetriNetUnfolderBase]: 2775/4737 cut-off events. [2024-06-14 14:07:07,956 INFO L125 PetriNetUnfolderBase]: For 234550/234550 co-relation queries the response was YES. [2024-06-14 14:07:07,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32001 conditions, 4737 events. 2775/4737 cut-off events. For 234550/234550 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 30848 event pairs, 764 based on Foata normal form. 2/4730 useless extension candidates. Maximal degree in co-relation 31909. Up to 4052 conditions per place. [2024-06-14 14:07:08,000 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 210 selfloop transitions, 87 changer transitions 0/305 dead transitions. [2024-06-14 14:07:08,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 305 transitions, 4508 flow [2024-06-14 14:07:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:07:08,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784883720930233 [2024-06-14 14:07:08,002 INFO L175 Difference]: Start difference. First operand has 196 places, 282 transitions, 3632 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:07:08,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 305 transitions, 4508 flow [2024-06-14 14:07:08,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 305 transitions, 4285 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:08,363 INFO L231 Difference]: Finished difference. Result has 197 places, 285 transitions, 3633 flow [2024-06-14 14:07:08,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3415, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3633, PETRI_PLACES=197, PETRI_TRANSITIONS=285} [2024-06-14 14:07:08,364 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-14 14:07:08,364 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 285 transitions, 3633 flow [2024-06-14 14:07:08,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:08,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:08,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:08,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 14:07:08,365 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:08,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:08,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1627728163, now seen corresponding path program 7 times [2024-06-14 14:07:08,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:08,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117195417] [2024-06-14 14:07:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:08,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:08,573 INFO 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 14:07:08,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:08,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117195417] [2024-06-14 14:07:08,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117195417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:08,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:08,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:08,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694626987] [2024-06-14 14:07:08,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:08,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:08,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:08,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:08,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:08,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:08,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 285 transitions, 3633 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:08,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:08,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:08,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:09,419 INFO L124 PetriNetUnfolderBase]: 2937/5032 cut-off events. [2024-06-14 14:07:09,420 INFO L125 PetriNetUnfolderBase]: For 304019/304019 co-relation queries the response was YES. [2024-06-14 14:07:09,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33673 conditions, 5032 events. 2937/5032 cut-off events. For 304019/304019 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33202 event pairs, 808 based on Foata normal form. 50/5078 useless extension candidates. Maximal degree in co-relation 33580. Up to 3746 conditions per place. [2024-06-14 14:07:09,470 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 194 selfloop transitions, 138 changer transitions 3/343 dead transitions. [2024-06-14 14:07:09,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 343 transitions, 4945 flow [2024-06-14 14:07:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2024-06-14 14:07:09,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-06-14 14:07:09,472 INFO L175 Difference]: Start difference. First operand has 197 places, 285 transitions, 3633 flow. Second operand 12 states and 320 transitions. [2024-06-14 14:07:09,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 343 transitions, 4945 flow [2024-06-14 14:07:09,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 343 transitions, 4777 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:09,833 INFO L231 Difference]: Finished difference. Result has 204 places, 286 transitions, 3838 flow [2024-06-14 14:07:09,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3838, PETRI_PLACES=204, PETRI_TRANSITIONS=286} [2024-06-14 14:07:09,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-14 14:07:09,834 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 286 transitions, 3838 flow [2024-06-14 14:07:09,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:09,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:09,834 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 14:07:09,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 14:07:09,834 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:09,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:09,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1892501889, now seen corresponding path program 8 times [2024-06-14 14:07:09,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:09,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110602000] [2024-06-14 14:07:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:09,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:10,028 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 14:07:10,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:10,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110602000] [2024-06-14 14:07:10,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110602000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:10,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:10,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:10,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426311565] [2024-06-14 14:07:10,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:10,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:10,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:10,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:10,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:10,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:10,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 286 transitions, 3838 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:10,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:10,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:10,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:10,837 INFO L124 PetriNetUnfolderBase]: 3089/5298 cut-off events. [2024-06-14 14:07:10,837 INFO L125 PetriNetUnfolderBase]: For 327138/327138 co-relation queries the response was YES. [2024-06-14 14:07:10,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35746 conditions, 5298 events. 3089/5298 cut-off events. For 327138/327138 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 35367 event pairs, 863 based on Foata normal form. 50/5344 useless extension candidates. Maximal degree in co-relation 35652. Up to 4002 conditions per place. [2024-06-14 14:07:10,887 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 189 selfloop transitions, 136 changer transitions 3/336 dead transitions. [2024-06-14 14:07:10,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 336 transitions, 5128 flow [2024-06-14 14:07:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-06-14 14:07:10,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6325581395348837 [2024-06-14 14:07:10,889 INFO L175 Difference]: Start difference. First operand has 204 places, 286 transitions, 3838 flow. Second operand 10 states and 272 transitions. [2024-06-14 14:07:10,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 336 transitions, 5128 flow [2024-06-14 14:07:11,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 336 transitions, 4778 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:11,335 INFO L231 Difference]: Finished difference. Result has 204 places, 287 transitions, 3861 flow [2024-06-14 14:07:11,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3861, PETRI_PLACES=204, PETRI_TRANSITIONS=287} [2024-06-14 14:07:11,336 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-14 14:07:11,336 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 287 transitions, 3861 flow [2024-06-14 14:07:11,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:11,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:11,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:11,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 14:07:11,337 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:11,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:11,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1887740289, now seen corresponding path program 9 times [2024-06-14 14:07:11,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:11,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001757085] [2024-06-14 14:07:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:11,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:11,539 INFO 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 14:07:11,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:11,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001757085] [2024-06-14 14:07:11,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001757085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:11,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:11,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357759204] [2024-06-14 14:07:11,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:11,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:11,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:11,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:11,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 287 transitions, 3861 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:11,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:11,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:11,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:12,496 INFO L124 PetriNetUnfolderBase]: 3442/5901 cut-off events. [2024-06-14 14:07:12,496 INFO L125 PetriNetUnfolderBase]: For 394849/394849 co-relation queries the response was YES. [2024-06-14 14:07:12,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40936 conditions, 5901 events. 3442/5901 cut-off events. For 394849/394849 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 40120 event pairs, 948 based on Foata normal form. 42/5939 useless extension candidates. Maximal degree in co-relation 40841. Up to 3682 conditions per place. [2024-06-14 14:07:12,545 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 192 selfloop transitions, 143 changer transitions 4/347 dead transitions. [2024-06-14 14:07:12,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 347 transitions, 5499 flow [2024-06-14 14:07:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2024-06-14 14:07:12,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6465116279069767 [2024-06-14 14:07:12,547 INFO L175 Difference]: Start difference. First operand has 204 places, 287 transitions, 3861 flow. Second operand 10 states and 278 transitions. [2024-06-14 14:07:12,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 347 transitions, 5499 flow [2024-06-14 14:07:13,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 347 transitions, 5149 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:13,109 INFO L231 Difference]: Finished difference. Result has 206 places, 290 transitions, 4000 flow [2024-06-14 14:07:13,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4000, PETRI_PLACES=206, PETRI_TRANSITIONS=290} [2024-06-14 14:07:13,110 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-14 14:07:13,110 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 290 transitions, 4000 flow [2024-06-14 14:07:13,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:13,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:13,110 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 14:07:13,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 14:07:13,110 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:13,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:13,111 INFO L85 PathProgramCache]: Analyzing trace with hash -528234111, now seen corresponding path program 10 times [2024-06-14 14:07:13,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:13,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729570710] [2024-06-14 14:07:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:13,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:13,297 INFO 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 14:07:13,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:13,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729570710] [2024-06-14 14:07:13,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729570710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:13,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:13,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:13,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433141649] [2024-06-14 14:07:13,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:13,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:13,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:13,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:13,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:13,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:13,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 290 transitions, 4000 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:13,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:13,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:13,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:14,201 INFO L124 PetriNetUnfolderBase]: 3340/5749 cut-off events. [2024-06-14 14:07:14,201 INFO L125 PetriNetUnfolderBase]: For 347483/347483 co-relation queries the response was YES. [2024-06-14 14:07:14,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37430 conditions, 5749 events. 3340/5749 cut-off events. For 347483/347483 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 39057 event pairs, 985 based on Foata normal form. 50/5795 useless extension candidates. Maximal degree in co-relation 37334. Up to 4389 conditions per place. [2024-06-14 14:07:14,258 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 197 selfloop transitions, 138 changer transitions 0/343 dead transitions. [2024-06-14 14:07:14,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 343 transitions, 5338 flow [2024-06-14 14:07:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 294 transitions. [2024-06-14 14:07:14,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6215644820295984 [2024-06-14 14:07:14,260 INFO L175 Difference]: Start difference. First operand has 206 places, 290 transitions, 4000 flow. Second operand 11 states and 294 transitions. [2024-06-14 14:07:14,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 343 transitions, 5338 flow [2024-06-14 14:07:14,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 343 transitions, 4983 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:14,838 INFO L231 Difference]: Finished difference. Result has 211 places, 290 transitions, 3930 flow [2024-06-14 14:07:14,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3930, PETRI_PLACES=211, PETRI_TRANSITIONS=290} [2024-06-14 14:07:14,839 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-14 14:07:14,839 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 290 transitions, 3930 flow [2024-06-14 14:07:14,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:14,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:14,840 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 14:07:14,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 14:07:14,840 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:14,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash 377275587, now seen corresponding path program 2 times [2024-06-14 14:07:14,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:14,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700611356] [2024-06-14 14:07:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:14,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:15,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:15,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700611356] [2024-06-14 14:07:15,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700611356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:15,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:15,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:15,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419684844] [2024-06-14 14:07:15,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:15,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:15,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:15,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:15,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:15,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:15,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 290 transitions, 3930 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:15,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:15,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:15,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:15,941 INFO L124 PetriNetUnfolderBase]: 3469/5996 cut-off events. [2024-06-14 14:07:15,941 INFO L125 PetriNetUnfolderBase]: For 339830/339830 co-relation queries the response was YES. [2024-06-14 14:07:15,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38239 conditions, 5996 events. 3469/5996 cut-off events. For 339830/339830 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 41357 event pairs, 985 based on Foata normal form. 42/6034 useless extension candidates. Maximal degree in co-relation 38141. Up to 4151 conditions per place. [2024-06-14 14:07:16,002 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 198 selfloop transitions, 142 changer transitions 6/354 dead transitions. [2024-06-14 14:07:16,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 354 transitions, 5340 flow [2024-06-14 14:07:16,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 323 transitions. [2024-06-14 14:07:16,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625968992248062 [2024-06-14 14:07:16,003 INFO L175 Difference]: Start difference. First operand has 211 places, 290 transitions, 3930 flow. Second operand 12 states and 323 transitions. [2024-06-14 14:07:16,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 354 transitions, 5340 flow [2024-06-14 14:07:16,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 354 transitions, 5040 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:16,538 INFO L231 Difference]: Finished difference. Result has 213 places, 291 transitions, 4016 flow [2024-06-14 14:07:16,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4016, PETRI_PLACES=213, PETRI_TRANSITIONS=291} [2024-06-14 14:07:16,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-14 14:07:16,538 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 291 transitions, 4016 flow [2024-06-14 14:07:16,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:16,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:16,539 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 14:07:16,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 14:07:16,539 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:16,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash -519656287, now seen corresponding path program 3 times [2024-06-14 14:07:16,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:16,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137910159] [2024-06-14 14:07:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:16,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:16,705 INFO 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 14:07:16,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:16,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137910159] [2024-06-14 14:07:16,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137910159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:16,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:16,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:16,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112905970] [2024-06-14 14:07:16,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:16,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:16,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:16,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:16,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:16,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:16,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 291 transitions, 4016 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:16,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:16,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:16,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:17,664 INFO L124 PetriNetUnfolderBase]: 3590/6243 cut-off events. [2024-06-14 14:07:17,665 INFO L125 PetriNetUnfolderBase]: For 360220/360220 co-relation queries the response was YES. [2024-06-14 14:07:17,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39678 conditions, 6243 events. 3590/6243 cut-off events. For 360220/360220 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 43640 event pairs, 1048 based on Foata normal form. 42/6281 useless extension candidates. Maximal degree in co-relation 39579. Up to 4480 conditions per place. [2024-06-14 14:07:17,724 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 206 selfloop transitions, 142 changer transitions 0/356 dead transitions. [2024-06-14 14:07:17,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 356 transitions, 5552 flow [2024-06-14 14:07:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 322 transitions. [2024-06-14 14:07:17,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-06-14 14:07:17,725 INFO L175 Difference]: Start difference. First operand has 213 places, 291 transitions, 4016 flow. Second operand 12 states and 322 transitions. [2024-06-14 14:07:17,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 356 transitions, 5552 flow [2024-06-14 14:07:18,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 356 transitions, 5177 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:18,145 INFO L231 Difference]: Finished difference. Result has 215 places, 293 transitions, 4046 flow [2024-06-14 14:07:18,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3641, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4046, PETRI_PLACES=215, PETRI_TRANSITIONS=293} [2024-06-14 14:07:18,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 14:07:18,145 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 293 transitions, 4046 flow [2024-06-14 14:07:18,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:18,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:18,146 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 14:07:18,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 14:07:18,146 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:18,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:18,146 INFO L85 PathProgramCache]: Analyzing trace with hash 957383841, now seen corresponding path program 4 times [2024-06-14 14:07:18,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:18,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382702643] [2024-06-14 14:07:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:18,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:18,312 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 14:07:18,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:18,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382702643] [2024-06-14 14:07:18,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382702643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:18,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:18,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:18,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668225748] [2024-06-14 14:07:18,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:18,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:18,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:18,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:18,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:18,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 293 transitions, 4046 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:18,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:18,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:18,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:19,409 INFO L124 PetriNetUnfolderBase]: 3807/6631 cut-off events. [2024-06-14 14:07:19,409 INFO L125 PetriNetUnfolderBase]: For 395900/395900 co-relation queries the response was YES. [2024-06-14 14:07:19,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41559 conditions, 6631 events. 3807/6631 cut-off events. For 395900/395900 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 47047 event pairs, 1079 based on Foata normal form. 42/6669 useless extension candidates. Maximal degree in co-relation 41459. Up to 3063 conditions per place. [2024-06-14 14:07:19,473 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 198 selfloop transitions, 151 changer transitions 0/357 dead transitions. [2024-06-14 14:07:19,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 357 transitions, 5572 flow [2024-06-14 14:07:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 301 transitions. [2024-06-14 14:07:19,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-14 14:07:19,474 INFO L175 Difference]: Start difference. First operand has 215 places, 293 transitions, 4046 flow. Second operand 11 states and 301 transitions. [2024-06-14 14:07:19,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 357 transitions, 5572 flow [2024-06-14 14:07:19,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 357 transitions, 5197 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:19,974 INFO L231 Difference]: Finished difference. Result has 215 places, 293 transitions, 3944 flow [2024-06-14 14:07:19,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3944, PETRI_PLACES=215, PETRI_TRANSITIONS=293} [2024-06-14 14:07:19,975 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 14:07:19,975 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 293 transitions, 3944 flow [2024-06-14 14:07:19,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:19,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:19,975 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 14:07:19,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 14:07:19,976 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 14:07:19,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:19,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1183092931, now seen corresponding path program 1 times [2024-06-14 14:07:19,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:19,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275375409] [2024-06-14 14:07:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:20,168 INFO 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 14:07:20,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:20,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275375409] [2024-06-14 14:07:20,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275375409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:20,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:20,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:20,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711473023] [2024-06-14 14:07:20,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:20,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:20,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:20,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:20,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 293 transitions, 3944 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:20,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:20,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:20,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:21,031 INFO L124 PetriNetUnfolderBase]: 3823/6648 cut-off events. [2024-06-14 14:07:21,031 INFO L125 PetriNetUnfolderBase]: For 345804/345804 co-relation queries the response was YES. [2024-06-14 14:07:21,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41609 conditions, 6648 events. 3823/6648 cut-off events. For 345804/345804 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 47205 event pairs, 1312 based on Foata normal form. 4/6643 useless extension candidates. Maximal degree in co-relation 41508. Up to 5987 conditions per place. [2024-06-14 14:07:21,100 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 256 selfloop transitions, 43 changer transitions 0/307 dead transitions. [2024-06-14 14:07:21,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 307 transitions, 4624 flow [2024-06-14 14:07:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 14:07:21,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-14 14:07:21,101 INFO L175 Difference]: Start difference. First operand has 215 places, 293 transitions, 3944 flow. Second operand 6 states and 147 transitions. [2024-06-14 14:07:21,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 307 transitions, 4624 flow [2024-06-14 14:07:21,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 307 transitions, 4227 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:21,894 INFO L231 Difference]: Finished difference. Result has 212 places, 296 transitions, 3701 flow [2024-06-14 14:07:21,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3701, PETRI_PLACES=212, PETRI_TRANSITIONS=296} [2024-06-14 14:07:21,895 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-14 14:07:21,895 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 296 transitions, 3701 flow [2024-06-14 14:07:21,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:21,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:21,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:21,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 14:07:21,896 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 14:07:21,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1903780475, now seen corresponding path program 2 times [2024-06-14 14:07:21,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:21,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327856558] [2024-06-14 14:07:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:21,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:22,056 INFO 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 14:07:22,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:22,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327856558] [2024-06-14 14:07:22,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327856558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:22,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:22,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:22,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129764577] [2024-06-14 14:07:22,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:22,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:22,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:22,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:22,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:22,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 296 transitions, 3701 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:22,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:22,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:22,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:22,879 INFO L124 PetriNetUnfolderBase]: 3699/6438 cut-off events. [2024-06-14 14:07:22,879 INFO L125 PetriNetUnfolderBase]: For 300564/300564 co-relation queries the response was YES. [2024-06-14 14:07:22,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38471 conditions, 6438 events. 3699/6438 cut-off events. For 300564/300564 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45389 event pairs, 1219 based on Foata normal form. 4/6433 useless extension candidates. Maximal degree in co-relation 38369. Up to 5747 conditions per place. [2024-06-14 14:07:22,942 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 256 selfloop transitions, 47 changer transitions 0/311 dead transitions. [2024-06-14 14:07:22,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 311 transitions, 4397 flow [2024-06-14 14:07:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 14:07:22,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-14 14:07:22,943 INFO L175 Difference]: Start difference. First operand has 212 places, 296 transitions, 3701 flow. Second operand 6 states and 147 transitions. [2024-06-14 14:07:22,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 311 transitions, 4397 flow [2024-06-14 14:07:23,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 311 transitions, 4265 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:23,464 INFO L231 Difference]: Finished difference. Result has 214 places, 299 transitions, 3737 flow [2024-06-14 14:07:23,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3569, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3737, PETRI_PLACES=214, PETRI_TRANSITIONS=299} [2024-06-14 14:07:23,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-14 14:07:23,464 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 299 transitions, 3737 flow [2024-06-14 14:07:23,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:23,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:23,465 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 14:07:23,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 14:07:23,465 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 14:07:23,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1711138135, now seen corresponding path program 1 times [2024-06-14 14:07:23,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:23,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680601105] [2024-06-14 14:07:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:23,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:23,632 INFO 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 14:07:23,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:23,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680601105] [2024-06-14 14:07:23,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680601105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:23,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:23,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974137197] [2024-06-14 14:07:23,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:23,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:23,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:23,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:23,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:23,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 299 transitions, 3737 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:07:23,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:23,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:23,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:24,504 INFO L124 PetriNetUnfolderBase]: 3735/6513 cut-off events. [2024-06-14 14:07:24,504 INFO L125 PetriNetUnfolderBase]: For 311800/311800 co-relation queries the response was YES. [2024-06-14 14:07:24,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39280 conditions, 6513 events. 3735/6513 cut-off events. For 311800/311800 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 45961 event pairs, 1211 based on Foata normal form. 2/6511 useless extension candidates. Maximal degree in co-relation 39177. Up to 5699 conditions per place. [2024-06-14 14:07:24,674 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 251 selfloop transitions, 71 changer transitions 0/330 dead transitions. [2024-06-14 14:07:24,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 330 transitions, 4929 flow [2024-06-14 14:07:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:07:24,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-14 14:07:24,675 INFO L175 Difference]: Start difference. First operand has 214 places, 299 transitions, 3737 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:07:24,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 330 transitions, 4929 flow [2024-06-14 14:07:25,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 330 transitions, 4783 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:25,173 INFO L231 Difference]: Finished difference. Result has 218 places, 310 transitions, 3914 flow [2024-06-14 14:07:25,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3591, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3914, PETRI_PLACES=218, PETRI_TRANSITIONS=310} [2024-06-14 14:07:25,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-14 14:07:25,174 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 310 transitions, 3914 flow [2024-06-14 14:07:25,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:07:25,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:25,174 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 14:07:25,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 14:07:25,175 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 14:07:25,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash -641191721, now seen corresponding path program 2 times [2024-06-14 14:07:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:25,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796135830] [2024-06-14 14:07:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:25,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:25,327 INFO 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 14:07:25,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:25,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796135830] [2024-06-14 14:07:25,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796135830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:25,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:25,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:25,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957290530] [2024-06-14 14:07:25,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:25,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:25,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:25,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:25,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:25,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 310 transitions, 3914 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:25,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:25,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:25,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:26,218 INFO L124 PetriNetUnfolderBase]: 3745/6503 cut-off events. [2024-06-14 14:07:26,218 INFO L125 PetriNetUnfolderBase]: For 321857/321857 co-relation queries the response was YES. [2024-06-14 14:07:26,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39577 conditions, 6503 events. 3745/6503 cut-off events. For 321857/321857 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 45872 event pairs, 1240 based on Foata normal form. 2/6488 useless extension candidates. Maximal degree in co-relation 39472. Up to 5709 conditions per place. [2024-06-14 14:07:26,284 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 240 selfloop transitions, 79 changer transitions 0/327 dead transitions. [2024-06-14 14:07:26,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 327 transitions, 4998 flow [2024-06-14 14:07:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 14:07:26,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-14 14:07:26,286 INFO L175 Difference]: Start difference. First operand has 218 places, 310 transitions, 3914 flow. Second operand 6 states and 153 transitions. [2024-06-14 14:07:26,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 327 transitions, 4998 flow [2024-06-14 14:07:26,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 327 transitions, 4862 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:26,948 INFO L231 Difference]: Finished difference. Result has 221 places, 314 transitions, 4005 flow [2024-06-14 14:07:26,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4005, PETRI_PLACES=221, PETRI_TRANSITIONS=314} [2024-06-14 14:07:26,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-14 14:07:26,949 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 314 transitions, 4005 flow [2024-06-14 14:07:26,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:26,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:26,949 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 14:07:26,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 14:07:26,949 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 14:07:26,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:26,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1563528535, now seen corresponding path program 3 times [2024-06-14 14:07:26,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:26,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443873303] [2024-06-14 14:07:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:26,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:27,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:27,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443873303] [2024-06-14 14:07:27,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443873303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:27,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:27,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:27,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764274362] [2024-06-14 14:07:27,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:27,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:27,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:27,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:27,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 314 transitions, 4005 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:27,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:27,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:27,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:27,952 INFO L124 PetriNetUnfolderBase]: 3741/6499 cut-off events. [2024-06-14 14:07:27,952 INFO L125 PetriNetUnfolderBase]: For 328382/328382 co-relation queries the response was YES. [2024-06-14 14:07:27,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39556 conditions, 6499 events. 3741/6499 cut-off events. For 328382/328382 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 45843 event pairs, 1240 based on Foata normal form. 2/6484 useless extension candidates. Maximal degree in co-relation 39449. Up to 5707 conditions per place. [2024-06-14 14:07:28,016 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 246 selfloop transitions, 73 changer transitions 0/327 dead transitions. [2024-06-14 14:07:28,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 327 transitions, 5033 flow [2024-06-14 14:07:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 14:07:28,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 14:07:28,017 INFO L175 Difference]: Start difference. First operand has 221 places, 314 transitions, 4005 flow. Second operand 6 states and 152 transitions. [2024-06-14 14:07:28,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 327 transitions, 5033 flow [2024-06-14 14:07:28,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 327 transitions, 4836 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:28,631 INFO L231 Difference]: Finished difference. Result has 223 places, 314 transitions, 3963 flow [2024-06-14 14:07:28,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3808, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3963, PETRI_PLACES=223, PETRI_TRANSITIONS=314} [2024-06-14 14:07:28,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-14 14:07:28,632 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 314 transitions, 3963 flow [2024-06-14 14:07:28,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:28,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:28,632 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 14:07:28,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 14:07:28,632 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 14:07:28,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:28,633 INFO L85 PathProgramCache]: Analyzing trace with hash 913831235, now seen corresponding path program 4 times [2024-06-14 14:07:28,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:28,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549106980] [2024-06-14 14:07:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:28,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:28,785 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 14:07:28,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549106980] [2024-06-14 14:07:28,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549106980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:28,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:28,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:28,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279726574] [2024-06-14 14:07:28,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:28,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:28,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:28,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:28,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:28,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:28,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 314 transitions, 3963 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:28,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:28,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:28,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:29,676 INFO L124 PetriNetUnfolderBase]: 3751/6541 cut-off events. [2024-06-14 14:07:29,676 INFO L125 PetriNetUnfolderBase]: For 337672/337672 co-relation queries the response was YES. [2024-06-14 14:07:29,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39766 conditions, 6541 events. 3751/6541 cut-off events. For 337672/337672 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 46233 event pairs, 1221 based on Foata normal form. 2/6539 useless extension candidates. Maximal degree in co-relation 39660. Up to 5717 conditions per place. [2024-06-14 14:07:29,743 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 249 selfloop transitions, 78 changer transitions 1/336 dead transitions. [2024-06-14 14:07:29,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 336 transitions, 4965 flow [2024-06-14 14:07:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:07:29,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085271317829457 [2024-06-14 14:07:29,744 INFO L175 Difference]: Start difference. First operand has 223 places, 314 transitions, 3963 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:07:29,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 336 transitions, 4965 flow [2024-06-14 14:07:30,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 336 transitions, 4718 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:30,293 INFO L231 Difference]: Finished difference. Result has 222 places, 317 transitions, 3929 flow [2024-06-14 14:07:30,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3929, PETRI_PLACES=222, PETRI_TRANSITIONS=317} [2024-06-14 14:07:30,294 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 14:07:30,294 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 317 transitions, 3929 flow [2024-06-14 14:07:30,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:30,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:30,294 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 14:07:30,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 14:07:30,294 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 14:07:30,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash -346553125, now seen corresponding path program 5 times [2024-06-14 14:07:30,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:30,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914209469] [2024-06-14 14:07:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:30,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:30,446 INFO 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 14:07:30,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:30,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914209469] [2024-06-14 14:07:30,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914209469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:30,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:30,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:30,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980272207] [2024-06-14 14:07:30,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:30,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:30,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:30,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:30,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:30,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:30,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 317 transitions, 3929 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:30,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:30,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:30,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:31,309 INFO L124 PetriNetUnfolderBase]: 3759/6557 cut-off events. [2024-06-14 14:07:31,309 INFO L125 PetriNetUnfolderBase]: For 347173/347173 co-relation queries the response was YES. [2024-06-14 14:07:31,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39914 conditions, 6557 events. 3759/6557 cut-off events. For 347173/347173 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 46407 event pairs, 1221 based on Foata normal form. 2/6555 useless extension candidates. Maximal degree in co-relation 39810. Up to 5727 conditions per place. [2024-06-14 14:07:31,375 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 246 selfloop transitions, 81 changer transitions 1/336 dead transitions. [2024-06-14 14:07:31,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 336 transitions, 4929 flow [2024-06-14 14:07:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 14:07:31,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2024-06-14 14:07:31,377 INFO L175 Difference]: Start difference. First operand has 222 places, 317 transitions, 3929 flow. Second operand 6 states and 154 transitions. [2024-06-14 14:07:31,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 336 transitions, 4929 flow [2024-06-14 14:07:32,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 336 transitions, 4804 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:32,065 INFO L231 Difference]: Finished difference. Result has 225 places, 320 transitions, 4019 flow [2024-06-14 14:07:32,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3807, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4019, PETRI_PLACES=225, PETRI_TRANSITIONS=320} [2024-06-14 14:07:32,066 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-14 14:07:32,066 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 320 transitions, 4019 flow [2024-06-14 14:07:32,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:32,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:32,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:32,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 14:07:32,067 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 14:07:32,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1633048259, now seen corresponding path program 6 times [2024-06-14 14:07:32,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:32,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026285483] [2024-06-14 14:07:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:32,219 INFO 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 14:07:32,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:32,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026285483] [2024-06-14 14:07:32,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026285483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:32,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:32,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:32,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469342731] [2024-06-14 14:07:32,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:32,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:32,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:32,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:32,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:32,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:32,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 320 transitions, 4019 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:32,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:32,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:32,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:33,077 INFO L124 PetriNetUnfolderBase]: 3690/6408 cut-off events. [2024-06-14 14:07:33,077 INFO L125 PetriNetUnfolderBase]: For 353872/353872 co-relation queries the response was YES. [2024-06-14 14:07:33,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39398 conditions, 6408 events. 3690/6408 cut-off events. For 353872/353872 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 44977 event pairs, 1209 based on Foata normal form. 2/6397 useless extension candidates. Maximal degree in co-relation 39293. Up to 5601 conditions per place. [2024-06-14 14:07:33,142 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 237 selfloop transitions, 83 changer transitions 3/331 dead transitions. [2024-06-14 14:07:33,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 331 transitions, 4817 flow [2024-06-14 14:07:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:07:33,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-14 14:07:33,143 INFO L175 Difference]: Start difference. First operand has 225 places, 320 transitions, 4019 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:07:33,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 331 transitions, 4817 flow [2024-06-14 14:07:33,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 331 transitions, 4698 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:33,747 INFO L231 Difference]: Finished difference. Result has 228 places, 317 transitions, 4031 flow [2024-06-14 14:07:33,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3900, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4031, PETRI_PLACES=228, PETRI_TRANSITIONS=317} [2024-06-14 14:07:33,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 14:07:33,748 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 317 transitions, 4031 flow [2024-06-14 14:07:33,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:33,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:33,749 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 14:07:33,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 14:07:33,749 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 14:07:33,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1376555685, now seen corresponding path program 1 times [2024-06-14 14:07:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:33,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775523776] [2024-06-14 14:07:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:33,912 INFO 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 14:07:33,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775523776] [2024-06-14 14:07:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775523776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:33,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:33,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:33,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176331634] [2024-06-14 14:07:33,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:33,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:33,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:33,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 317 transitions, 4031 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:33,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:33,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:33,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:34,766 INFO L124 PetriNetUnfolderBase]: 3522/6131 cut-off events. [2024-06-14 14:07:34,767 INFO L125 PetriNetUnfolderBase]: For 368033/368033 co-relation queries the response was YES. [2024-06-14 14:07:34,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38679 conditions, 6131 events. 3522/6131 cut-off events. For 368033/368033 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 42625 event pairs, 1077 based on Foata normal form. 4/6131 useless extension candidates. Maximal degree in co-relation 38573. Up to 5461 conditions per place. [2024-06-14 14:07:34,832 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 281 selfloop transitions, 45 changer transitions 0/334 dead transitions. [2024-06-14 14:07:34,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 334 transitions, 4775 flow [2024-06-14 14:07:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:07:34,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775193798449613 [2024-06-14 14:07:34,833 INFO L175 Difference]: Start difference. First operand has 228 places, 317 transitions, 4031 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:07:34,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 334 transitions, 4775 flow [2024-06-14 14:07:35,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 334 transitions, 4398 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:35,646 INFO L231 Difference]: Finished difference. Result has 225 places, 320 transitions, 3814 flow [2024-06-14 14:07:35,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3654, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3814, PETRI_PLACES=225, PETRI_TRANSITIONS=320} [2024-06-14 14:07:35,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-14 14:07:35,647 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 320 transitions, 3814 flow [2024-06-14 14:07:35,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:35,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:35,647 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 14:07:35,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 14:07:35,648 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 14:07:35,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:35,648 INFO L85 PathProgramCache]: Analyzing trace with hash 700945377, now seen corresponding path program 2 times [2024-06-14 14:07:35,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:35,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213829648] [2024-06-14 14:07:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:35,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:35,810 INFO 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 14:07:35,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213829648] [2024-06-14 14:07:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213829648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:35,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:35,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:35,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102750095] [2024-06-14 14:07:35,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:35,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:35,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:35,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:35,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:35,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 320 transitions, 3814 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:35,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:35,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:35,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:36,632 INFO L124 PetriNetUnfolderBase]: 3538/6152 cut-off events. [2024-06-14 14:07:36,633 INFO L125 PetriNetUnfolderBase]: For 377724/377724 co-relation queries the response was YES. [2024-06-14 14:07:36,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38771 conditions, 6152 events. 3538/6152 cut-off events. For 377724/377724 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 42814 event pairs, 1095 based on Foata normal form. 4/6147 useless extension candidates. Maximal degree in co-relation 38665. Up to 5485 conditions per place. [2024-06-14 14:07:36,699 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 283 selfloop transitions, 43 changer transitions 0/334 dead transitions. [2024-06-14 14:07:36,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 334 transitions, 4556 flow [2024-06-14 14:07:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 14:07:36,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562015503875969 [2024-06-14 14:07:36,701 INFO L175 Difference]: Start difference. First operand has 225 places, 320 transitions, 3814 flow. Second operand 6 states and 145 transitions. [2024-06-14 14:07:36,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 334 transitions, 4556 flow [2024-06-14 14:07:37,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 334 transitions, 4418 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:37,362 INFO L231 Difference]: Finished difference. Result has 227 places, 323 transitions, 3838 flow [2024-06-14 14:07:37,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3838, PETRI_PLACES=227, PETRI_TRANSITIONS=323} [2024-06-14 14:07:37,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-14 14:07:37,362 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 323 transitions, 3838 flow [2024-06-14 14:07:37,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:37,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:37,363 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 14:07:37,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 14:07:37,363 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 14:07:37,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:37,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1642579395, now seen corresponding path program 3 times [2024-06-14 14:07:37,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:37,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022141393] [2024-06-14 14:07:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:37,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:37,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:37,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022141393] [2024-06-14 14:07:37,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022141393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:37,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:37,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:37,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167549099] [2024-06-14 14:07:37,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:37,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:37,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:37,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:37,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:37,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:37,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 323 transitions, 3838 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:37,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:37,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:37,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:38,465 INFO L124 PetriNetUnfolderBase]: 3541/6165 cut-off events. [2024-06-14 14:07:38,466 INFO L125 PetriNetUnfolderBase]: For 384721/384721 co-relation queries the response was YES. [2024-06-14 14:07:38,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38861 conditions, 6165 events. 3541/6165 cut-off events. For 384721/384721 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43048 event pairs, 1086 based on Foata normal form. 4/6160 useless extension candidates. Maximal degree in co-relation 38754. Up to 5438 conditions per place. [2024-06-14 14:07:38,533 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 278 selfloop transitions, 52 changer transitions 0/338 dead transitions. [2024-06-14 14:07:38,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 338 transitions, 4596 flow [2024-06-14 14:07:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:07:38,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658914728682171 [2024-06-14 14:07:38,535 INFO L175 Difference]: Start difference. First operand has 227 places, 323 transitions, 3838 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:07:38,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 338 transitions, 4596 flow [2024-06-14 14:07:39,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 338 transitions, 4456 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:39,255 INFO L231 Difference]: Finished difference. Result has 229 places, 326 transitions, 3884 flow [2024-06-14 14:07:39,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3884, PETRI_PLACES=229, PETRI_TRANSITIONS=326} [2024-06-14 14:07:39,255 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-14 14:07:39,255 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 326 transitions, 3884 flow [2024-06-14 14:07:39,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:39,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:39,256 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 14:07:39,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 14:07:39,256 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 14:07:39,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1213040302, now seen corresponding path program 1 times [2024-06-14 14:07:39,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:39,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757639300] [2024-06-14 14:07:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:39,493 INFO 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 14:07:39,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:39,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757639300] [2024-06-14 14:07:39,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757639300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:39,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:39,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:39,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027663971] [2024-06-14 14:07:39,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:39,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:39,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:39,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:39,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:39,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:39,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 326 transitions, 3884 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:39,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:39,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:39,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:40,409 INFO L124 PetriNetUnfolderBase]: 3546/6174 cut-off events. [2024-06-14 14:07:40,410 INFO L125 PetriNetUnfolderBase]: For 388442/388442 co-relation queries the response was YES. [2024-06-14 14:07:40,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39101 conditions, 6174 events. 3546/6174 cut-off events. For 388442/388442 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 42985 event pairs, 1074 based on Foata normal form. 1/6168 useless extension candidates. Maximal degree in co-relation 38993. Up to 5489 conditions per place. [2024-06-14 14:07:40,474 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 293 selfloop transitions, 51 changer transitions 0/352 dead transitions. [2024-06-14 14:07:40,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 352 transitions, 4668 flow [2024-06-14 14:07:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:07:40,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913621262458472 [2024-06-14 14:07:40,476 INFO L175 Difference]: Start difference. First operand has 229 places, 326 transitions, 3884 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:07:40,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 352 transitions, 4668 flow [2024-06-14 14:07:41,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 352 transitions, 4504 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:41,034 INFO L231 Difference]: Finished difference. Result has 232 places, 329 transitions, 3872 flow [2024-06-14 14:07:41,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3720, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3872, PETRI_PLACES=232, PETRI_TRANSITIONS=329} [2024-06-14 14:07:41,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-14 14:07:41,035 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 329 transitions, 3872 flow [2024-06-14 14:07:41,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:41,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:41,035 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] [2024-06-14 14:07:41,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 14:07:41,035 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 14:07:41,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:41,036 INFO L85 PathProgramCache]: Analyzing trace with hash 170419404, now seen corresponding path program 2 times [2024-06-14 14:07:41,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:41,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698982613] [2024-06-14 14:07:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:41,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:41,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:41,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698982613] [2024-06-14 14:07:41,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698982613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:41,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:41,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:41,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183602756] [2024-06-14 14:07:41,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:41,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:41,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:41,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:41,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:41,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:41,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 329 transitions, 3872 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:41,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:41,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:41,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:42,177 INFO L124 PetriNetUnfolderBase]: 3551/6179 cut-off events. [2024-06-14 14:07:42,177 INFO L125 PetriNetUnfolderBase]: For 398062/398062 co-relation queries the response was YES. [2024-06-14 14:07:42,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39126 conditions, 6179 events. 3551/6179 cut-off events. For 398062/398062 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 43046 event pairs, 1072 based on Foata normal form. 1/6173 useless extension candidates. Maximal degree in co-relation 39017. Up to 5359 conditions per place. [2024-06-14 14:07:42,240 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 252 selfloop transitions, 101 changer transitions 0/361 dead transitions. [2024-06-14 14:07:42,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 361 transitions, 5088 flow [2024-06-14 14:07:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-14 14:07:42,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-14 14:07:42,241 INFO L175 Difference]: Start difference. First operand has 232 places, 329 transitions, 3872 flow. Second operand 10 states and 242 transitions. [2024-06-14 14:07:42,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 361 transitions, 5088 flow [2024-06-14 14:07:42,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 361 transitions, 4980 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:42,959 INFO L231 Difference]: Finished difference. Result has 237 places, 332 transitions, 4004 flow [2024-06-14 14:07:42,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3764, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4004, PETRI_PLACES=237, PETRI_TRANSITIONS=332} [2024-06-14 14:07:42,960 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-14 14:07:42,960 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 332 transitions, 4004 flow [2024-06-14 14:07:42,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:42,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:42,961 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 14:07:42,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 14:07:42,961 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 14:07:42,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:42,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2063640876, now seen corresponding path program 1 times [2024-06-14 14:07:42,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:42,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325766713] [2024-06-14 14:07:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:42,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:43,177 INFO 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 14:07:43,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:43,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325766713] [2024-06-14 14:07:43,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325766713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:43,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:43,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:43,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281616894] [2024-06-14 14:07:43,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:43,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:43,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:43,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:43,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:43,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:43,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 332 transitions, 4004 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:43,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:43,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:43,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:44,143 INFO L124 PetriNetUnfolderBase]: 3567/6209 cut-off events. [2024-06-14 14:07:44,143 INFO L125 PetriNetUnfolderBase]: For 416566/416566 co-relation queries the response was YES. [2024-06-14 14:07:44,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39601 conditions, 6209 events. 3567/6209 cut-off events. For 416566/416566 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 43178 event pairs, 951 based on Foata normal form. 4/6211 useless extension candidates. Maximal degree in co-relation 39491. Up to 5467 conditions per place. [2024-06-14 14:07:44,212 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 320 selfloop transitions, 33 changer transitions 0/361 dead transitions. [2024-06-14 14:07:44,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 361 transitions, 4945 flow [2024-06-14 14:07:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:44,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:07:44,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-06-14 14:07:44,214 INFO L175 Difference]: Start difference. First operand has 237 places, 332 transitions, 4004 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:07:44,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 361 transitions, 4945 flow [2024-06-14 14:07:45,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 361 transitions, 4767 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:45,018 INFO L231 Difference]: Finished difference. Result has 237 places, 335 transitions, 3935 flow [2024-06-14 14:07:45,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3826, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3935, PETRI_PLACES=237, PETRI_TRANSITIONS=335} [2024-06-14 14:07:45,018 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-14 14:07:45,018 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 335 transitions, 3935 flow [2024-06-14 14:07:45,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:45,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:45,019 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 14:07:45,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 14:07:45,019 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 14:07:45,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:45,019 INFO L85 PathProgramCache]: Analyzing trace with hash 77389590, now seen corresponding path program 2 times [2024-06-14 14:07:45,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:45,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959189302] [2024-06-14 14:07:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:45,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:45,234 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 14:07:45,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:45,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959189302] [2024-06-14 14:07:45,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959189302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:45,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:45,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:45,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867544293] [2024-06-14 14:07:45,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:45,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:45,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:45,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:45,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:45,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:45,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 335 transitions, 3935 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:45,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:45,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:45,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:46,148 INFO L124 PetriNetUnfolderBase]: 3547/6173 cut-off events. [2024-06-14 14:07:46,149 INFO L125 PetriNetUnfolderBase]: For 417570/417570 co-relation queries the response was YES. [2024-06-14 14:07:46,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39154 conditions, 6173 events. 3547/6173 cut-off events. For 417570/417570 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 42919 event pairs, 1048 based on Foata normal form. 4/6175 useless extension candidates. Maximal degree in co-relation 39043. Up to 5553 conditions per place. [2024-06-14 14:07:46,210 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 320 selfloop transitions, 28 changer transitions 0/356 dead transitions. [2024-06-14 14:07:46,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 356 transitions, 4683 flow [2024-06-14 14:07:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:07:46,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681063122923588 [2024-06-14 14:07:46,211 INFO L175 Difference]: Start difference. First operand has 237 places, 335 transitions, 3935 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:07:46,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 356 transitions, 4683 flow [2024-06-14 14:07:47,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 356 transitions, 4618 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:47,029 INFO L231 Difference]: Finished difference. Result has 240 places, 335 transitions, 3932 flow [2024-06-14 14:07:47,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3870, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3932, PETRI_PLACES=240, PETRI_TRANSITIONS=335} [2024-06-14 14:07:47,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-14 14:07:47,030 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 335 transitions, 3932 flow [2024-06-14 14:07:47,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:47,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:47,031 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 14:07:47,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 14:07:47,031 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 14:07:47,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:47,031 INFO L85 PathProgramCache]: Analyzing trace with hash 222556850, now seen corresponding path program 3 times [2024-06-14 14:07:47,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:47,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165996181] [2024-06-14 14:07:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:47,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:47,232 INFO 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 14:07:47,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:47,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165996181] [2024-06-14 14:07:47,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165996181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:47,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:47,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:47,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536298851] [2024-06-14 14:07:47,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:47,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:47,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:47,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:47,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:47,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:47,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 335 transitions, 3932 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:47,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:47,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:47,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:48,126 INFO L124 PetriNetUnfolderBase]: 3563/6191 cut-off events. [2024-06-14 14:07:48,126 INFO L125 PetriNetUnfolderBase]: For 431703/431703 co-relation queries the response was YES. [2024-06-14 14:07:48,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39591 conditions, 6191 events. 3563/6191 cut-off events. For 431703/431703 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 43022 event pairs, 1062 based on Foata normal form. 4/6188 useless extension candidates. Maximal degree in co-relation 39479. Up to 5363 conditions per place. [2024-06-14 14:07:48,194 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 256 selfloop transitions, 104 changer transitions 0/368 dead transitions. [2024-06-14 14:07:48,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 368 transitions, 5252 flow [2024-06-14 14:07:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-14 14:07:48,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5651162790697675 [2024-06-14 14:07:48,196 INFO L175 Difference]: Start difference. First operand has 240 places, 335 transitions, 3932 flow. Second operand 10 states and 243 transitions. [2024-06-14 14:07:48,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 368 transitions, 5252 flow [2024-06-14 14:07:48,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 368 transitions, 5166 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:48,930 INFO L231 Difference]: Finished difference. Result has 243 places, 338 transitions, 4168 flow [2024-06-14 14:07:48,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3846, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4168, PETRI_PLACES=243, PETRI_TRANSITIONS=338} [2024-06-14 14:07:48,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-14 14:07:48,930 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 338 transitions, 4168 flow [2024-06-14 14:07:48,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:48,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:48,931 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 14:07:48,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 14:07:48,931 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 14:07:48,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:48,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1940862996, now seen corresponding path program 1 times [2024-06-14 14:07:48,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:48,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722766112] [2024-06-14 14:07:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:48,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:49,100 INFO 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 14:07:49,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:49,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722766112] [2024-06-14 14:07:49,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722766112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:49,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:49,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:49,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525102613] [2024-06-14 14:07:49,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:49,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:49,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:49,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:49,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:49,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:49,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 338 transitions, 4168 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:07:49,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:49,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:49,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:50,015 INFO L124 PetriNetUnfolderBase]: 3560/6182 cut-off events. [2024-06-14 14:07:50,016 INFO L125 PetriNetUnfolderBase]: For 434428/434428 co-relation queries the response was YES. [2024-06-14 14:07:50,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39996 conditions, 6182 events. 3560/6182 cut-off events. For 434428/434428 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 42940 event pairs, 1080 based on Foata normal form. 1/6171 useless extension candidates. Maximal degree in co-relation 39883. Up to 5381 conditions per place. [2024-06-14 14:07:50,079 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 265 selfloop transitions, 89 changer transitions 0/362 dead transitions. [2024-06-14 14:07:50,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 362 transitions, 5080 flow [2024-06-14 14:07:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:50,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:07:50,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013289036544851 [2024-06-14 14:07:50,081 INFO L175 Difference]: Start difference. First operand has 243 places, 338 transitions, 4168 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:07:50,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 362 transitions, 5080 flow [2024-06-14 14:07:50,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 362 transitions, 4780 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:50,791 INFO L231 Difference]: Finished difference. Result has 242 places, 338 transitions, 4052 flow [2024-06-14 14:07:50,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3868, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4052, PETRI_PLACES=242, PETRI_TRANSITIONS=338} [2024-06-14 14:07:50,791 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 14:07:50,793 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 338 transitions, 4052 flow [2024-06-14 14:07:50,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:07:50,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:50,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:50,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 14:07:50,793 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 14:07:50,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1936101396, now seen corresponding path program 2 times [2024-06-14 14:07:50,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:50,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71509878] [2024-06-14 14:07:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:50,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:50,947 INFO 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 14:07:50,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:50,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71509878] [2024-06-14 14:07:50,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71509878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:50,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:50,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:50,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529180740] [2024-06-14 14:07:50,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:50,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:50,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:50,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:50,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:50,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:50,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 338 transitions, 4052 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:50,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:50,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:50,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:51,793 INFO L124 PetriNetUnfolderBase]: 3570/6199 cut-off events. [2024-06-14 14:07:51,793 INFO L125 PetriNetUnfolderBase]: For 445649/445649 co-relation queries the response was YES. [2024-06-14 14:07:51,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39911 conditions, 6199 events. 3570/6199 cut-off events. For 445649/445649 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43128 event pairs, 1080 based on Foata normal form. 2/6189 useless extension candidates. Maximal degree in co-relation 39797. Up to 5389 conditions per place. [2024-06-14 14:07:51,858 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 257 selfloop transitions, 97 changer transitions 0/362 dead transitions. [2024-06-14 14:07:51,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 362 transitions, 5176 flow [2024-06-14 14:07:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 14:07:51,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-14 14:07:51,859 INFO L175 Difference]: Start difference. First operand has 242 places, 338 transitions, 4052 flow. Second operand 6 states and 156 transitions. [2024-06-14 14:07:51,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 362 transitions, 5176 flow [2024-06-14 14:07:52,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 362 transitions, 4986 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:52,681 INFO L231 Difference]: Finished difference. Result has 243 places, 344 transitions, 4146 flow [2024-06-14 14:07:52,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3874, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4146, PETRI_PLACES=243, PETRI_TRANSITIONS=344} [2024-06-14 14:07:52,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-14 14:07:52,682 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 344 transitions, 4146 flow [2024-06-14 14:07:52,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:52,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:52,682 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 14:07:52,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 14:07:52,683 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 14:07:52,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1161334034, now seen corresponding path program 3 times [2024-06-14 14:07:52,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:52,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705757140] [2024-06-14 14:07:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:52,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:52,893 INFO 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 14:07:52,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:52,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705757140] [2024-06-14 14:07:52,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705757140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:52,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:52,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:52,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137795861] [2024-06-14 14:07:52,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:52,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:52,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:52,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:52,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:52,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 344 transitions, 4146 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:52,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:52,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:52,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:53,852 INFO L124 PetriNetUnfolderBase]: 3575/6215 cut-off events. [2024-06-14 14:07:53,852 INFO L125 PetriNetUnfolderBase]: For 454525/454525 co-relation queries the response was YES. [2024-06-14 14:07:53,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40119 conditions, 6215 events. 3575/6215 cut-off events. For 454525/454525 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43283 event pairs, 1067 based on Foata normal form. 1/6212 useless extension candidates. Maximal degree in co-relation 40004. Up to 5504 conditions per place. [2024-06-14 14:07:53,918 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 310 selfloop transitions, 54 changer transitions 0/372 dead transitions. [2024-06-14 14:07:53,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 372 transitions, 5120 flow [2024-06-14 14:07:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 14:07:53,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 14:07:53,919 INFO L175 Difference]: Start difference. First operand has 243 places, 344 transitions, 4146 flow. Second operand 8 states and 200 transitions. [2024-06-14 14:07:53,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 372 transitions, 5120 flow [2024-06-14 14:07:54,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 372 transitions, 4988 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 14:07:54,852 INFO L231 Difference]: Finished difference. Result has 250 places, 347 transitions, 4181 flow [2024-06-14 14:07:54,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4181, PETRI_PLACES=250, PETRI_TRANSITIONS=347} [2024-06-14 14:07:54,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-14 14:07:54,853 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 347 transitions, 4181 flow [2024-06-14 14:07:54,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:54,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:54,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:54,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 14:07:54,854 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 14:07:54,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:54,854 INFO L85 PathProgramCache]: Analyzing trace with hash -905576010, now seen corresponding path program 4 times [2024-06-14 14:07:54,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:54,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054573400] [2024-06-14 14:07:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:54,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:55,051 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 14:07:55,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:55,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054573400] [2024-06-14 14:07:55,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054573400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:55,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:55,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:55,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85849439] [2024-06-14 14:07:55,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:55,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:55,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:55,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:55,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:55,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:55,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 347 transitions, 4181 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:55,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:55,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:55,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:55,983 INFO L124 PetriNetUnfolderBase]: 3569/6193 cut-off events. [2024-06-14 14:07:55,984 INFO L125 PetriNetUnfolderBase]: For 463631/463631 co-relation queries the response was YES. [2024-06-14 14:07:56,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40004 conditions, 6193 events. 3569/6193 cut-off events. For 463631/463631 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43015 event pairs, 1075 based on Foata normal form. 2/6186 useless extension candidates. Maximal degree in co-relation 39887. Up to 5387 conditions per place. [2024-06-14 14:07:56,055 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 264 selfloop transitions, 96 changer transitions 0/368 dead transitions. [2024-06-14 14:07:56,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 368 transitions, 5251 flow [2024-06-14 14:07:56,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-14 14:07:56,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658914728682171 [2024-06-14 14:07:56,056 INFO L175 Difference]: Start difference. First operand has 250 places, 347 transitions, 4181 flow. Second operand 9 states and 219 transitions. [2024-06-14 14:07:56,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 368 transitions, 5251 flow [2024-06-14 14:07:56,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 368 transitions, 5136 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:56,988 INFO L231 Difference]: Finished difference. Result has 254 places, 347 transitions, 4265 flow [2024-06-14 14:07:56,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4265, PETRI_PLACES=254, PETRI_TRANSITIONS=347} [2024-06-14 14:07:56,989 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-14 14:07:56,989 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 347 transitions, 4265 flow [2024-06-14 14:07:56,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:56,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:56,989 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 14:07:56,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 14:07:56,990 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 14:07:56,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:56,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1838809870, now seen corresponding path program 4 times [2024-06-14 14:07:56,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:56,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664583781] [2024-06-14 14:07:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:56,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:57,192 INFO 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 14:07:57,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:57,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664583781] [2024-06-14 14:07:57,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664583781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:57,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:57,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:57,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228203601] [2024-06-14 14:07:57,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:57,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:57,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:57,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:57,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:57,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 347 transitions, 4265 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:57,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:57,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:57,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:58,134 INFO L124 PetriNetUnfolderBase]: 3628/6290 cut-off events. [2024-06-14 14:07:58,135 INFO L125 PetriNetUnfolderBase]: For 526031/526031 co-relation queries the response was YES. [2024-06-14 14:07:58,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40885 conditions, 6290 events. 3628/6290 cut-off events. For 526031/526031 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 43895 event pairs, 1084 based on Foata normal form. 20/6301 useless extension candidates. Maximal degree in co-relation 40767. Up to 5404 conditions per place. [2024-06-14 14:07:58,204 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 269 selfloop transitions, 98 changer transitions 0/375 dead transitions. [2024-06-14 14:07:58,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 375 transitions, 5483 flow [2024-06-14 14:07:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 14:07:58,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-14 14:07:58,206 INFO L175 Difference]: Start difference. First operand has 254 places, 347 transitions, 4265 flow. Second operand 9 states and 222 transitions. [2024-06-14 14:07:58,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 375 transitions, 5483 flow [2024-06-14 14:07:59,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 375 transitions, 5308 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:59,131 INFO L231 Difference]: Finished difference. Result has 256 places, 350 transitions, 4407 flow [2024-06-14 14:07:59,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4090, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4407, PETRI_PLACES=256, PETRI_TRANSITIONS=350} [2024-06-14 14:07:59,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-14 14:07:59,131 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 350 transitions, 4407 flow [2024-06-14 14:07:59,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:59,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:59,132 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] [2024-06-14 14:07:59,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 14:07:59,132 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 14:07:59,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:59,132 INFO L85 PathProgramCache]: Analyzing trace with hash 783935788, now seen corresponding path program 3 times [2024-06-14 14:07:59,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:59,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88487082] [2024-06-14 14:07:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:59,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:59,301 INFO 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 14:07:59,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:59,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88487082] [2024-06-14 14:07:59,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88487082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:59,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:59,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:59,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179428529] [2024-06-14 14:07:59,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:59,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:59,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:59,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:59,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:07:59,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 350 transitions, 4407 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:07:59,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:59,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:07:59,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:00,226 INFO L124 PetriNetUnfolderBase]: 3633/6308 cut-off events. [2024-06-14 14:08:00,226 INFO L125 PetriNetUnfolderBase]: For 484301/484301 co-relation queries the response was YES. [2024-06-14 14:08:00,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41255 conditions, 6308 events. 3633/6308 cut-off events. For 484301/484301 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 44019 event pairs, 1088 based on Foata normal form. 1/6305 useless extension candidates. Maximal degree in co-relation 41137. Up to 5485 conditions per place. [2024-06-14 14:08:00,296 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 282 selfloop transitions, 84 changer transitions 0/374 dead transitions. [2024-06-14 14:08:00,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 374 transitions, 5382 flow [2024-06-14 14:08:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:08:00,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-14 14:08:00,297 INFO L175 Difference]: Start difference. First operand has 256 places, 350 transitions, 4407 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:08:00,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 374 transitions, 5382 flow [2024-06-14 14:08:01,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 374 transitions, 5103 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:01,309 INFO L231 Difference]: Finished difference. Result has 256 places, 353 transitions, 4341 flow [2024-06-14 14:08:01,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4341, PETRI_PLACES=256, PETRI_TRANSITIONS=353} [2024-06-14 14:08:01,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-14 14:08:01,309 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 353 transitions, 4341 flow [2024-06-14 14:08:01,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:08:01,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:01,310 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 14:08:01,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 14:08:01,310 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 14:08:01,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:01,310 INFO L85 PathProgramCache]: Analyzing trace with hash 108046068, now seen corresponding path program 4 times [2024-06-14 14:08:01,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:01,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811126966] [2024-06-14 14:08:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:01,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:01,474 INFO 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 14:08:01,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:01,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811126966] [2024-06-14 14:08:01,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811126966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:01,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:01,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:01,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711219129] [2024-06-14 14:08:01,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:01,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:01,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:01,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:01,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:01,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:01,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 353 transitions, 4341 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:08:01,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:01,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:01,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:02,427 INFO L124 PetriNetUnfolderBase]: 3630/6304 cut-off events. [2024-06-14 14:08:02,428 INFO L125 PetriNetUnfolderBase]: For 486697/486697 co-relation queries the response was YES. [2024-06-14 14:08:02,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40619 conditions, 6304 events. 3630/6304 cut-off events. For 486697/486697 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 43997 event pairs, 1081 based on Foata normal form. 1/6301 useless extension candidates. Maximal degree in co-relation 40500. Up to 5483 conditions per place. [2024-06-14 14:08:02,500 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 282 selfloop transitions, 87 changer transitions 0/377 dead transitions. [2024-06-14 14:08:02,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 377 transitions, 5449 flow [2024-06-14 14:08:02,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-14 14:08:02,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684754521963824 [2024-06-14 14:08:02,501 INFO L175 Difference]: Start difference. First operand has 256 places, 353 transitions, 4341 flow. Second operand 9 states and 220 transitions. [2024-06-14 14:08:02,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 377 transitions, 5449 flow [2024-06-14 14:08:03,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 377 transitions, 5325 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:03,700 INFO L231 Difference]: Finished difference. Result has 261 places, 353 transitions, 4397 flow [2024-06-14 14:08:03,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4217, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4397, PETRI_PLACES=261, PETRI_TRANSITIONS=353} [2024-06-14 14:08:03,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-14 14:08:03,700 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 353 transitions, 4397 flow [2024-06-14 14:08:03,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:08:03,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:03,701 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] [2024-06-14 14:08:03,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 14:08:03,701 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 14:08:03,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:03,701 INFO L85 PathProgramCache]: Analyzing trace with hash -556353556, now seen corresponding path program 5 times [2024-06-14 14:08:03,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:03,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408499772] [2024-06-14 14:08:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:03,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:03,866 INFO 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 14:08:03,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:03,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408499772] [2024-06-14 14:08:03,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408499772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:03,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:03,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:03,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269411206] [2024-06-14 14:08:03,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:03,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:03,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:03,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:03,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:03,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 353 transitions, 4397 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:08:03,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:03,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:03,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:04,798 INFO L124 PetriNetUnfolderBase]: 3622/6295 cut-off events. [2024-06-14 14:08:04,798 INFO L125 PetriNetUnfolderBase]: For 495859/495859 co-relation queries the response was YES. [2024-06-14 14:08:04,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40568 conditions, 6295 events. 3622/6295 cut-off events. For 495859/495859 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 43977 event pairs, 1083 based on Foata normal form. 2/6293 useless extension candidates. Maximal degree in co-relation 40447. Up to 5475 conditions per place. [2024-06-14 14:08:04,867 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 279 selfloop transitions, 84 changer transitions 0/371 dead transitions. [2024-06-14 14:08:04,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 371 transitions, 5325 flow [2024-06-14 14:08:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:08:04,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-14 14:08:04,868 INFO L175 Difference]: Start difference. First operand has 261 places, 353 transitions, 4397 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:08:04,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 371 transitions, 5325 flow [2024-06-14 14:08:05,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 371 transitions, 5065 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:05,684 INFO L231 Difference]: Finished difference. Result has 259 places, 353 transitions, 4313 flow [2024-06-14 14:08:05,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4137, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4313, PETRI_PLACES=259, PETRI_TRANSITIONS=353} [2024-06-14 14:08:05,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-14 14:08:05,685 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 353 transitions, 4313 flow [2024-06-14 14:08:05,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:08:05,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:05,685 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 14:08:05,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 14:08:05,686 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 14:08:05,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:05,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1714685996, now seen corresponding path program 6 times [2024-06-14 14:08:05,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:05,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083446566] [2024-06-14 14:08:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:05,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:05,841 INFO 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 14:08:05,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:05,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083446566] [2024-06-14 14:08:05,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083446566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:05,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:05,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:05,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809137284] [2024-06-14 14:08:05,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:05,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:05,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:05,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:05,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:05,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:05,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 353 transitions, 4313 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:05,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:05,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:05,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:06,709 INFO L124 PetriNetUnfolderBase]: 3632/6283 cut-off events. [2024-06-14 14:08:06,710 INFO L125 PetriNetUnfolderBase]: For 507342/507342 co-relation queries the response was YES. [2024-06-14 14:08:06,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40744 conditions, 6283 events. 3632/6283 cut-off events. For 507342/507342 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 43855 event pairs, 1110 based on Foata normal form. 2/6266 useless extension candidates. Maximal degree in co-relation 40623. Up to 5485 conditions per place. [2024-06-14 14:08:06,780 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 270 selfloop transitions, 90 changer transitions 0/368 dead transitions. [2024-06-14 14:08:06,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 368 transitions, 5268 flow [2024-06-14 14:08:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 14:08:06,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852713178294574 [2024-06-14 14:08:06,781 INFO L175 Difference]: Start difference. First operand has 259 places, 353 transitions, 4313 flow. Second operand 6 states and 151 transitions. [2024-06-14 14:08:06,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 368 transitions, 5268 flow [2024-06-14 14:08:08,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 368 transitions, 5094 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:08,053 INFO L231 Difference]: Finished difference. Result has 259 places, 357 transitions, 4375 flow [2024-06-14 14:08:08,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4145, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4375, PETRI_PLACES=259, PETRI_TRANSITIONS=357} [2024-06-14 14:08:08,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-14 14:08:08,053 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 357 transitions, 4375 flow [2024-06-14 14:08:08,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:08,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:08,054 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] [2024-06-14 14:08:08,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 14:08:08,054 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 14:08:08,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash 627019836, now seen corresponding path program 7 times [2024-06-14 14:08:08,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:08,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526596115] [2024-06-14 14:08:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:08,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:08,226 INFO 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 14:08:08,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:08,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526596115] [2024-06-14 14:08:08,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526596115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:08,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:08,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:08,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12362034] [2024-06-14 14:08:08,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:08,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:08,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:08,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:08,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:08,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:08,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 357 transitions, 4375 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:08,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:08,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:08,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:09,111 INFO L124 PetriNetUnfolderBase]: 3624/6271 cut-off events. [2024-06-14 14:08:09,111 INFO L125 PetriNetUnfolderBase]: For 512483/512483 co-relation queries the response was YES. [2024-06-14 14:08:09,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40647 conditions, 6271 events. 3624/6271 cut-off events. For 512483/512483 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 43713 event pairs, 1110 based on Foata normal form. 2/6254 useless extension candidates. Maximal degree in co-relation 40525. Up to 5477 conditions per place. [2024-06-14 14:08:09,181 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 272 selfloop transitions, 87 changer transitions 0/367 dead transitions. [2024-06-14 14:08:09,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 367 transitions, 5117 flow [2024-06-14 14:08:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:08:09,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775193798449613 [2024-06-14 14:08:09,183 INFO L175 Difference]: Start difference. First operand has 259 places, 357 transitions, 4375 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:08:09,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 367 transitions, 5117 flow [2024-06-14 14:08:10,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 367 transitions, 4795 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:10,522 INFO L231 Difference]: Finished difference. Result has 259 places, 357 transitions, 4236 flow [2024-06-14 14:08:10,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4236, PETRI_PLACES=259, PETRI_TRANSITIONS=357} [2024-06-14 14:08:10,523 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-14 14:08:10,523 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 357 transitions, 4236 flow [2024-06-14 14:08:10,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:10,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:10,523 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 14:08:10,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 14:08:10,524 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 14:08:10,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2010288628, now seen corresponding path program 1 times [2024-06-14 14:08:10,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:10,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311769365] [2024-06-14 14:08:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:10,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:10,708 INFO 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 14:08:10,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:10,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311769365] [2024-06-14 14:08:10,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311769365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:10,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:10,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:10,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048140432] [2024-06-14 14:08:10,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:10,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:10,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:10,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:10,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 357 transitions, 4236 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:08:10,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:10,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:10,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:11,667 INFO L124 PetriNetUnfolderBase]: 3645/6333 cut-off events. [2024-06-14 14:08:11,667 INFO L125 PetriNetUnfolderBase]: For 532202/532202 co-relation queries the response was YES. [2024-06-14 14:08:11,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41314 conditions, 6333 events. 3645/6333 cut-off events. For 532202/532202 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 44266 event pairs, 970 based on Foata normal form. 2/6333 useless extension candidates. Maximal degree in co-relation 41191. Up to 5706 conditions per place. [2024-06-14 14:08:11,741 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 350 selfloop transitions, 27 changer transitions 0/385 dead transitions. [2024-06-14 14:08:11,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 385 transitions, 5364 flow [2024-06-14 14:08:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:08:11,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552325581395349 [2024-06-14 14:08:11,743 INFO L175 Difference]: Start difference. First operand has 259 places, 357 transitions, 4236 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:08:11,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 385 transitions, 5364 flow [2024-06-14 14:08:12,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 385 transitions, 5152 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:12,880 INFO L231 Difference]: Finished difference. Result has 261 places, 361 transitions, 4239 flow [2024-06-14 14:08:12,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4239, PETRI_PLACES=261, PETRI_TRANSITIONS=361} [2024-06-14 14:08:12,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-14 14:08:12,880 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 361 transitions, 4239 flow [2024-06-14 14:08:12,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:08:12,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:12,881 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 14:08:12,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 14:08:12,881 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 14:08:12,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:12,881 INFO L85 PathProgramCache]: Analyzing trace with hash -556342644, now seen corresponding path program 2 times [2024-06-14 14:08:12,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:12,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723734290] [2024-06-14 14:08:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:12,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:13,062 INFO 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 14:08:13,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:13,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723734290] [2024-06-14 14:08:13,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723734290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:13,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:13,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:13,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987327772] [2024-06-14 14:08:13,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:13,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:13,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:13,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:13,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:13,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:13,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 361 transitions, 4239 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:08:13,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:13,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:13,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:14,069 INFO L124 PetriNetUnfolderBase]: 3640/6326 cut-off events. [2024-06-14 14:08:14,070 INFO L125 PetriNetUnfolderBase]: For 537739/537739 co-relation queries the response was YES. [2024-06-14 14:08:14,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41070 conditions, 6326 events. 3640/6326 cut-off events. For 537739/537739 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 44219 event pairs, 1053 based on Foata normal form. 2/6326 useless extension candidates. Maximal degree in co-relation 40946. Up to 5734 conditions per place. [2024-06-14 14:08:14,135 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 349 selfloop transitions, 22 changer transitions 0/379 dead transitions. [2024-06-14 14:08:14,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 379 transitions, 5025 flow [2024-06-14 14:08:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:08:14,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548172757475083 [2024-06-14 14:08:14,137 INFO L175 Difference]: Start difference. First operand has 261 places, 361 transitions, 4239 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:08:14,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 379 transitions, 5025 flow [2024-06-14 14:08:15,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 379 transitions, 4862 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:15,028 INFO L231 Difference]: Finished difference. Result has 264 places, 361 transitions, 4125 flow [2024-06-14 14:08:15,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4076, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4125, PETRI_PLACES=264, PETRI_TRANSITIONS=361} [2024-06-14 14:08:15,029 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 14:08:15,029 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 361 transitions, 4125 flow [2024-06-14 14:08:15,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 14:08:15,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:15,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:15,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 14:08:15,030 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 14:08:15,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1591460412, now seen corresponding path program 3 times [2024-06-14 14:08:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:15,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623515345] [2024-06-14 14:08:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:15,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:15,195 INFO 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 14:08:15,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:15,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623515345] [2024-06-14 14:08:15,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623515345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:15,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:15,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:15,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674064554] [2024-06-14 14:08:15,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:15,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:15,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:15,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:15,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 361 transitions, 4125 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:15,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:15,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:15,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:16,083 INFO L124 PetriNetUnfolderBase]: 3635/6310 cut-off events. [2024-06-14 14:08:16,084 INFO L125 PetriNetUnfolderBase]: For 542461/542461 co-relation queries the response was YES. [2024-06-14 14:08:16,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40743 conditions, 6310 events. 3635/6310 cut-off events. For 542461/542461 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 44049 event pairs, 1059 based on Foata normal form. 2/6305 useless extension candidates. Maximal degree in co-relation 40617. Up to 5727 conditions per place. [2024-06-14 14:08:16,155 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 344 selfloop transitions, 22 changer transitions 0/374 dead transitions. [2024-06-14 14:08:16,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 374 transitions, 4963 flow [2024-06-14 14:08:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 14:08:16,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2024-06-14 14:08:16,157 INFO L175 Difference]: Start difference. First operand has 264 places, 361 transitions, 4125 flow. Second operand 6 states and 142 transitions. [2024-06-14 14:08:16,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 374 transitions, 4963 flow [2024-06-14 14:08:17,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 374 transitions, 4909 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:17,346 INFO L231 Difference]: Finished difference. Result has 264 places, 363 transitions, 4204 flow [2024-06-14 14:08:17,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4071, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4204, PETRI_PLACES=264, PETRI_TRANSITIONS=363} [2024-06-14 14:08:17,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 14:08:17,347 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 363 transitions, 4204 flow [2024-06-14 14:08:17,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:17,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:17,347 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 14:08:17,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 14:08:17,348 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 14:08:17,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash -156062616, now seen corresponding path program 1 times [2024-06-14 14:08:17,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:17,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767746496] [2024-06-14 14:08:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:17,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:17,546 INFO 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 14:08:17,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:17,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767746496] [2024-06-14 14:08:17,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767746496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:17,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:17,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:17,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825271969] [2024-06-14 14:08:17,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:17,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:17,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:17,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:17,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:17,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:17,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 363 transitions, 4204 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:17,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:17,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:17,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:18,484 INFO L124 PetriNetUnfolderBase]: 3640/6317 cut-off events. [2024-06-14 14:08:18,484 INFO L125 PetriNetUnfolderBase]: For 551401/551401 co-relation queries the response was YES. [2024-06-14 14:08:18,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40974 conditions, 6317 events. 3640/6317 cut-off events. For 551401/551401 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 44163 event pairs, 1063 based on Foata normal form. 1/6312 useless extension candidates. Maximal degree in co-relation 40847. Up to 5607 conditions per place. [2024-06-14 14:08:18,553 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 310 selfloop transitions, 62 changer transitions 0/380 dead transitions. [2024-06-14 14:08:18,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 380 transitions, 5191 flow [2024-06-14 14:08:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 14:08:18,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-14 14:08:18,554 INFO L175 Difference]: Start difference. First operand has 264 places, 363 transitions, 4204 flow. Second operand 6 states and 153 transitions. [2024-06-14 14:08:18,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 380 transitions, 5191 flow [2024-06-14 14:08:20,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 380 transitions, 5074 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:20,009 INFO L231 Difference]: Finished difference. Result has 266 places, 366 transitions, 4261 flow [2024-06-14 14:08:20,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4087, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4261, PETRI_PLACES=266, PETRI_TRANSITIONS=366} [2024-06-14 14:08:20,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-14 14:08:20,010 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 366 transitions, 4261 flow [2024-06-14 14:08:20,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:20,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:20,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:20,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 14:08:20,010 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 14:08:20,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:20,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1071711994, now seen corresponding path program 2 times [2024-06-14 14:08:20,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:20,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497844959] [2024-06-14 14:08:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:20,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:20,170 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 14:08:20,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497844959] [2024-06-14 14:08:20,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497844959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:20,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:20,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:20,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786258377] [2024-06-14 14:08:20,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:20,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:20,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:20,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:20,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 366 transitions, 4261 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:08:20,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:20,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:20,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:21,133 INFO L124 PetriNetUnfolderBase]: 3637/6313 cut-off events. [2024-06-14 14:08:21,133 INFO L125 PetriNetUnfolderBase]: For 559068/559068 co-relation queries the response was YES. [2024-06-14 14:08:21,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41033 conditions, 6313 events. 3637/6313 cut-off events. For 559068/559068 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 44095 event pairs, 1063 based on Foata normal form. 1/6308 useless extension candidates. Maximal degree in co-relation 40905. Up to 5604 conditions per place. [2024-06-14 14:08:21,208 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 308 selfloop transitions, 63 changer transitions 0/379 dead transitions. [2024-06-14 14:08:21,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 379 transitions, 5035 flow [2024-06-14 14:08:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 14:08:21,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 14:08:21,209 INFO L175 Difference]: Start difference. First operand has 266 places, 366 transitions, 4261 flow. Second operand 6 states and 152 transitions. [2024-06-14 14:08:21,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 379 transitions, 5035 flow [2024-06-14 14:08:22,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 379 transitions, 4935 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:22,644 INFO L231 Difference]: Finished difference. Result has 268 places, 366 transitions, 4301 flow [2024-06-14 14:08:22,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4161, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4301, PETRI_PLACES=268, PETRI_TRANSITIONS=366} [2024-06-14 14:08:22,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-14 14:08:22,645 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 366 transitions, 4301 flow [2024-06-14 14:08:22,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:08:22,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:22,645 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 14:08:22,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 14:08:22,645 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 14:08:22,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:22,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1612568040, now seen corresponding path program 3 times [2024-06-14 14:08:22,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:22,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988196506] [2024-06-14 14:08:22,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:22,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:22,842 INFO 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 14:08:22,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:22,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988196506] [2024-06-14 14:08:22,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988196506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:22,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:22,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:22,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042189933] [2024-06-14 14:08:22,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:22,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:22,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:22,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:22,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:22,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:22,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 366 transitions, 4301 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:22,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:22,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:22,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:23,831 INFO L124 PetriNetUnfolderBase]: 3634/6314 cut-off events. [2024-06-14 14:08:23,831 INFO L125 PetriNetUnfolderBase]: For 555530/555530 co-relation queries the response was YES. [2024-06-14 14:08:23,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40956 conditions, 6314 events. 3634/6314 cut-off events. For 555530/555530 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 44168 event pairs, 1069 based on Foata normal form. 1/6311 useless extension candidates. Maximal degree in co-relation 40828. Up to 5492 conditions per place. [2024-06-14 14:08:23,905 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 292 selfloop transitions, 96 changer transitions 0/396 dead transitions. [2024-06-14 14:08:23,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 396 transitions, 5495 flow [2024-06-14 14:08:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 14:08:23,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 14:08:23,907 INFO L175 Difference]: Start difference. First operand has 268 places, 366 transitions, 4301 flow. Second operand 9 states and 225 transitions. [2024-06-14 14:08:23,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 396 transitions, 5495 flow [2024-06-14 14:08:25,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 396 transitions, 5303 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:25,287 INFO L231 Difference]: Finished difference. Result has 270 places, 366 transitions, 4312 flow [2024-06-14 14:08:25,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4312, PETRI_PLACES=270, PETRI_TRANSITIONS=366} [2024-06-14 14:08:25,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-14 14:08:25,287 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 366 transitions, 4312 flow [2024-06-14 14:08:25,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:25,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:25,288 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 14:08:25,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 14:08:25,288 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 14:08:25,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:25,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2051290362, now seen corresponding path program 4 times [2024-06-14 14:08:25,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:25,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285037949] [2024-06-14 14:08:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:25,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:25,471 INFO 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 14:08:25,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:25,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285037949] [2024-06-14 14:08:25,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285037949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:25,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:25,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949774636] [2024-06-14 14:08:25,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:25,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:25,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:25,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 366 transitions, 4312 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:25,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:25,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:25,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:26,480 INFO L124 PetriNetUnfolderBase]: 3639/6323 cut-off events. [2024-06-14 14:08:26,481 INFO L125 PetriNetUnfolderBase]: For 555601/555601 co-relation queries the response was YES. [2024-06-14 14:08:26,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41085 conditions, 6323 events. 3639/6323 cut-off events. For 555601/555601 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 44189 event pairs, 1069 based on Foata normal form. 1/6320 useless extension candidates. Maximal degree in co-relation 40957. Up to 5498 conditions per place. [2024-06-14 14:08:26,556 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 291 selfloop transitions, 99 changer transitions 0/398 dead transitions. [2024-06-14 14:08:26,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 398 transitions, 5553 flow [2024-06-14 14:08:26,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 14:08:26,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5988372093023255 [2024-06-14 14:08:26,557 INFO L175 Difference]: Start difference. First operand has 270 places, 366 transitions, 4312 flow. Second operand 8 states and 206 transitions. [2024-06-14 14:08:26,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 398 transitions, 5553 flow [2024-06-14 14:08:28,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 398 transitions, 5350 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:28,074 INFO L231 Difference]: Finished difference. Result has 271 places, 369 transitions, 4359 flow [2024-06-14 14:08:28,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4121, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4359, PETRI_PLACES=271, PETRI_TRANSITIONS=369} [2024-06-14 14:08:28,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-14 14:08:28,075 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 369 transitions, 4359 flow [2024-06-14 14:08:28,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:28,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:28,075 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 14:08:28,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 14:08:28,075 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 14:08:28,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1794374142, now seen corresponding path program 5 times [2024-06-14 14:08:28,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:28,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325509061] [2024-06-14 14:08:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:28,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:28,260 INFO 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 14:08:28,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325509061] [2024-06-14 14:08:28,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325509061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:28,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:28,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:28,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627644647] [2024-06-14 14:08:28,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:28,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:28,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:28,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:28,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:28,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:28,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 369 transitions, 4359 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:28,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:28,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:28,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:29,221 INFO L124 PetriNetUnfolderBase]: 3652/6342 cut-off events. [2024-06-14 14:08:29,221 INFO L125 PetriNetUnfolderBase]: For 572057/572057 co-relation queries the response was YES. [2024-06-14 14:08:29,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41410 conditions, 6342 events. 3652/6342 cut-off events. For 572057/572057 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 44395 event pairs, 1085 based on Foata normal form. 1/6334 useless extension candidates. Maximal degree in co-relation 41282. Up to 5513 conditions per place. [2024-06-14 14:08:29,295 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 279 selfloop transitions, 109 changer transitions 0/396 dead transitions. [2024-06-14 14:08:29,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 396 transitions, 5617 flow [2024-06-14 14:08:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 14:08:29,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2024-06-14 14:08:29,297 INFO L175 Difference]: Start difference. First operand has 271 places, 369 transitions, 4359 flow. Second operand 9 states and 213 transitions. [2024-06-14 14:08:29,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 396 transitions, 5617 flow [2024-06-14 14:08:31,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 396 transitions, 5429 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:31,041 INFO L231 Difference]: Finished difference. Result has 275 places, 375 transitions, 4479 flow [2024-06-14 14:08:31,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4180, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4479, PETRI_PLACES=275, PETRI_TRANSITIONS=375} [2024-06-14 14:08:31,042 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 14:08:31,042 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 375 transitions, 4479 flow [2024-06-14 14:08:31,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:31,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:31,042 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 14:08:31,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 14:08:31,042 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 14:08:31,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:31,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1132252142, now seen corresponding path program 6 times [2024-06-14 14:08:31,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:31,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118640128] [2024-06-14 14:08:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:31,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:31,239 INFO 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 14:08:31,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:31,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118640128] [2024-06-14 14:08:31,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118640128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:31,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:31,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:31,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233665234] [2024-06-14 14:08:31,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:31,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:31,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:31,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:31,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:31,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 375 transitions, 4479 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:31,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:31,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:31,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:32,303 INFO L124 PetriNetUnfolderBase]: 3657/6340 cut-off events. [2024-06-14 14:08:32,303 INFO L125 PetriNetUnfolderBase]: For 584640/584640 co-relation queries the response was YES. [2024-06-14 14:08:32,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41637 conditions, 6340 events. 3657/6340 cut-off events. For 584640/584640 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 44364 event pairs, 1078 based on Foata normal form. 1/6332 useless extension candidates. Maximal degree in co-relation 41508. Up to 5519 conditions per place. [2024-06-14 14:08:32,371 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 284 selfloop transitions, 110 changer transitions 0/402 dead transitions. [2024-06-14 14:08:32,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 402 transitions, 5896 flow [2024-06-14 14:08:32,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-14 14:08:32,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433403805496829 [2024-06-14 14:08:32,373 INFO L175 Difference]: Start difference. First operand has 275 places, 375 transitions, 4479 flow. Second operand 11 states and 257 transitions. [2024-06-14 14:08:32,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 402 transitions, 5896 flow [2024-06-14 14:08:33,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 402 transitions, 5676 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:33,675 INFO L231 Difference]: Finished difference. Result has 280 places, 378 transitions, 4530 flow [2024-06-14 14:08:33,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4530, PETRI_PLACES=280, PETRI_TRANSITIONS=378} [2024-06-14 14:08:33,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-14 14:08:33,675 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 378 transitions, 4530 flow [2024-06-14 14:08:33,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:33,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:33,676 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 14:08:33,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 14:08:33,676 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 14:08:33,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1740039490, now seen corresponding path program 7 times [2024-06-14 14:08:33,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:33,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491376866] [2024-06-14 14:08:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:33,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:33,872 INFO 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 14:08:33,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491376866] [2024-06-14 14:08:33,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491376866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:33,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:33,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79165039] [2024-06-14 14:08:33,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:33,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:33,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:33,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:33,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 378 transitions, 4530 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:33,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:33,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:33,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:34,845 INFO L124 PetriNetUnfolderBase]: 3654/6354 cut-off events. [2024-06-14 14:08:34,845 INFO L125 PetriNetUnfolderBase]: For 593083/593083 co-relation queries the response was YES. [2024-06-14 14:08:34,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41685 conditions, 6354 events. 3654/6354 cut-off events. For 593083/593083 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 44512 event pairs, 1071 based on Foata normal form. 1/6351 useless extension candidates. Maximal degree in co-relation 41555. Up to 5516 conditions per place. [2024-06-14 14:08:34,921 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 281 selfloop transitions, 116 changer transitions 0/405 dead transitions. [2024-06-14 14:08:34,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 405 transitions, 5746 flow [2024-06-14 14:08:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-14 14:08:34,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710594315245479 [2024-06-14 14:08:34,923 INFO L175 Difference]: Start difference. First operand has 280 places, 378 transitions, 4530 flow. Second operand 9 states and 221 transitions. [2024-06-14 14:08:34,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 405 transitions, 5746 flow [2024-06-14 14:08:36,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 405 transitions, 5475 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:36,278 INFO L231 Difference]: Finished difference. Result has 281 places, 378 transitions, 4497 flow [2024-06-14 14:08:36,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4259, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4497, PETRI_PLACES=281, PETRI_TRANSITIONS=378} [2024-06-14 14:08:36,278 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-14 14:08:36,278 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 378 transitions, 4497 flow [2024-06-14 14:08:36,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:36,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:36,279 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 14:08:36,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 14:08:36,279 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 14:08:36,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:36,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1392310428, now seen corresponding path program 8 times [2024-06-14 14:08:36,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:36,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688573473] [2024-06-14 14:08:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:36,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:36,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:36,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688573473] [2024-06-14 14:08:36,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688573473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:36,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:36,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:36,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568567214] [2024-06-14 14:08:36,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:36,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:36,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:36,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:36,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:36,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:36,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 378 transitions, 4497 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:36,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:36,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:36,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:37,499 INFO L124 PetriNetUnfolderBase]: 3651/6336 cut-off events. [2024-06-14 14:08:37,499 INFO L125 PetriNetUnfolderBase]: For 601577/601577 co-relation queries the response was YES. [2024-06-14 14:08:37,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41594 conditions, 6336 events. 3651/6336 cut-off events. For 601577/601577 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 44339 event pairs, 1080 based on Foata normal form. 1/6328 useless extension candidates. Maximal degree in co-relation 41464. Up to 5513 conditions per place. [2024-06-14 14:08:37,575 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 282 selfloop transitions, 108 changer transitions 0/398 dead transitions. [2024-06-14 14:08:37,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 398 transitions, 5505 flow [2024-06-14 14:08:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 14:08:37,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 14:08:37,577 INFO L175 Difference]: Start difference. First operand has 281 places, 378 transitions, 4497 flow. Second operand 9 states and 216 transitions. [2024-06-14 14:08:37,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 398 transitions, 5505 flow [2024-06-14 14:08:39,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 398 transitions, 5214 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:39,173 INFO L231 Difference]: Finished difference. Result has 281 places, 378 transitions, 4429 flow [2024-06-14 14:08:39,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4206, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4429, PETRI_PLACES=281, PETRI_TRANSITIONS=378} [2024-06-14 14:08:39,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-14 14:08:39,174 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 378 transitions, 4429 flow [2024-06-14 14:08:39,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:39,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:39,174 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 14:08:39,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 14:08:39,175 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 14:08:39,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:39,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1050521372, now seen corresponding path program 9 times [2024-06-14 14:08:39,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:39,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742011189] [2024-06-14 14:08:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:39,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:39,372 INFO 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 14:08:39,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:39,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742011189] [2024-06-14 14:08:39,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742011189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:39,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:39,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:39,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706349665] [2024-06-14 14:08:39,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:39,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:39,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:39,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:39,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:39,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:39,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 378 transitions, 4429 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:39,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:39,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:39,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:40,383 INFO L124 PetriNetUnfolderBase]: 3648/6328 cut-off events. [2024-06-14 14:08:40,384 INFO L125 PetriNetUnfolderBase]: For 609767/609767 co-relation queries the response was YES. [2024-06-14 14:08:40,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41534 conditions, 6328 events. 3648/6328 cut-off events. For 609767/609767 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 44226 event pairs, 1078 based on Foata normal form. 1/6320 useless extension candidates. Maximal degree in co-relation 41403. Up to 5510 conditions per place. [2024-06-14 14:08:40,461 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 274 selfloop transitions, 116 changer transitions 0/398 dead transitions. [2024-06-14 14:08:40,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 398 transitions, 5257 flow [2024-06-14 14:08:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:40,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-14 14:08:40,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-06-14 14:08:40,462 INFO L175 Difference]: Start difference. First operand has 281 places, 378 transitions, 4429 flow. Second operand 10 states and 235 transitions. [2024-06-14 14:08:40,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 398 transitions, 5257 flow [2024-06-14 14:08:42,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 398 transitions, 5073 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:42,221 INFO L231 Difference]: Finished difference. Result has 284 places, 378 transitions, 4483 flow [2024-06-14 14:08:42,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4245, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4483, PETRI_PLACES=284, PETRI_TRANSITIONS=378} [2024-06-14 14:08:42,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-14 14:08:42,222 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 378 transitions, 4483 flow [2024-06-14 14:08:42,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:42,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:42,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 14:08:42,222 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 14:08:42,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:42,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1405005192, now seen corresponding path program 1 times [2024-06-14 14:08:42,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:42,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181019902] [2024-06-14 14:08:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:42,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:42,438 INFO 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 14:08:42,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:42,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181019902] [2024-06-14 14:08:42,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181019902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:42,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:42,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:42,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137383414] [2024-06-14 14:08:42,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:42,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:42,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:42,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:42,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:42,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:42,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 378 transitions, 4483 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:42,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:42,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:43,476 INFO L124 PetriNetUnfolderBase]: 3780/6557 cut-off events. [2024-06-14 14:08:43,477 INFO L125 PetriNetUnfolderBase]: For 740513/740513 co-relation queries the response was YES. [2024-06-14 14:08:43,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44773 conditions, 6557 events. 3780/6557 cut-off events. For 740513/740513 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 46236 event pairs, 1002 based on Foata normal form. 12/6563 useless extension candidates. Maximal degree in co-relation 44641. Up to 5372 conditions per place. [2024-06-14 14:08:43,562 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 329 selfloop transitions, 72 changer transitions 0/409 dead transitions. [2024-06-14 14:08:43,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 409 transitions, 5699 flow [2024-06-14 14:08:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:43,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 14:08:43,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980066445182725 [2024-06-14 14:08:43,563 INFO L175 Difference]: Start difference. First operand has 284 places, 378 transitions, 4483 flow. Second operand 7 states and 180 transitions. [2024-06-14 14:08:43,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 409 transitions, 5699 flow [2024-06-14 14:08:45,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 409 transitions, 5458 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:45,454 INFO L231 Difference]: Finished difference. Result has 283 places, 382 transitions, 4552 flow [2024-06-14 14:08:45,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4552, PETRI_PLACES=283, PETRI_TRANSITIONS=382} [2024-06-14 14:08:45,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-14 14:08:45,454 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 382 transitions, 4552 flow [2024-06-14 14:08:45,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:45,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:45,455 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 14:08:45,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 14:08:45,455 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 14:08:45,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1071804250, now seen corresponding path program 2 times [2024-06-14 14:08:45,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:45,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347718744] [2024-06-14 14:08:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:45,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:45,619 INFO 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 14:08:45,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:45,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347718744] [2024-06-14 14:08:45,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347718744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:45,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:45,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:45,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630250017] [2024-06-14 14:08:45,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:45,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:45,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:45,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:45,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:45,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:45,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 382 transitions, 4552 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:45,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:45,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:45,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:46,795 INFO L124 PetriNetUnfolderBase]: 3866/6698 cut-off events. [2024-06-14 14:08:46,795 INFO L125 PetriNetUnfolderBase]: For 796919/796919 co-relation queries the response was YES. [2024-06-14 14:08:46,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47050 conditions, 6698 events. 3866/6698 cut-off events. For 796919/796919 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 47380 event pairs, 1108 based on Foata normal form. 12/6704 useless extension candidates. Maximal degree in co-relation 46916. Up to 5746 conditions per place. [2024-06-14 14:08:46,881 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 327 selfloop transitions, 73 changer transitions 0/408 dead transitions. [2024-06-14 14:08:46,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 408 transitions, 5740 flow [2024-06-14 14:08:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:08:46,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913621262458472 [2024-06-14 14:08:46,882 INFO L175 Difference]: Start difference. First operand has 283 places, 382 transitions, 4552 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:08:46,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 408 transitions, 5740 flow [2024-06-14 14:08:48,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 408 transitions, 5621 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:48,833 INFO L231 Difference]: Finished difference. Result has 287 places, 386 transitions, 4718 flow [2024-06-14 14:08:48,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4437, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4718, PETRI_PLACES=287, PETRI_TRANSITIONS=386} [2024-06-14 14:08:48,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-14 14:08:48,834 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 386 transitions, 4718 flow [2024-06-14 14:08:48,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:48,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:48,834 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 14:08:48,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 14:08:48,835 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 14:08:48,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:48,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1071448060, now seen corresponding path program 3 times [2024-06-14 14:08:48,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:48,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468952648] [2024-06-14 14:08:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:48,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:49,006 INFO 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 14:08:49,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:49,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468952648] [2024-06-14 14:08:49,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468952648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:49,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:49,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:49,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992729884] [2024-06-14 14:08:49,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:49,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:49,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:49,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:49,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:49,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:49,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 386 transitions, 4718 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:49,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:49,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:49,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:50,079 INFO L124 PetriNetUnfolderBase]: 3830/6649 cut-off events. [2024-06-14 14:08:50,079 INFO L125 PetriNetUnfolderBase]: For 757378/757378 co-relation queries the response was YES. [2024-06-14 14:08:50,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45341 conditions, 6649 events. 3830/6649 cut-off events. For 757378/757378 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 47018 event pairs, 1100 based on Foata normal form. 16/6659 useless extension candidates. Maximal degree in co-relation 45205. Up to 5818 conditions per place. [2024-06-14 14:08:50,157 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 327 selfloop transitions, 69 changer transitions 0/404 dead transitions. [2024-06-14 14:08:50,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 404 transitions, 5566 flow [2024-06-14 14:08:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:08:50,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-14 14:08:50,159 INFO L175 Difference]: Start difference. First operand has 287 places, 386 transitions, 4718 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:08:50,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 404 transitions, 5566 flow [2024-06-14 14:08:52,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 404 transitions, 5354 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:52,762 INFO L231 Difference]: Finished difference. Result has 289 places, 386 transitions, 4655 flow [2024-06-14 14:08:52,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4655, PETRI_PLACES=289, PETRI_TRANSITIONS=386} [2024-06-14 14:08:52,763 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-14 14:08:52,763 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 386 transitions, 4655 flow [2024-06-14 14:08:52,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:52,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:52,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:52,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 14:08:52,764 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 14:08:52,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:52,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1800583458, now seen corresponding path program 4 times [2024-06-14 14:08:52,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:52,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086425826] [2024-06-14 14:08:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:52,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:52,969 INFO 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 14:08:52,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:52,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086425826] [2024-06-14 14:08:52,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086425826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:52,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:52,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:52,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248428315] [2024-06-14 14:08:52,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:52,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:52,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:52,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:52,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:53,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:53,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 386 transitions, 4655 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:53,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:53,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:53,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:54,078 INFO L124 PetriNetUnfolderBase]: 3886/6730 cut-off events. [2024-06-14 14:08:54,078 INFO L125 PetriNetUnfolderBase]: For 769973/769973 co-relation queries the response was YES. [2024-06-14 14:08:54,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45669 conditions, 6730 events. 3886/6730 cut-off events. For 769973/769973 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 47580 event pairs, 1136 based on Foata normal form. 16/6737 useless extension candidates. Maximal degree in co-relation 45533. Up to 5820 conditions per place. [2024-06-14 14:08:54,155 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 293 selfloop transitions, 110 changer transitions 0/411 dead transitions. [2024-06-14 14:08:54,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 411 transitions, 5589 flow [2024-06-14 14:08:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-14 14:08:54,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633074935400517 [2024-06-14 14:08:54,157 INFO L175 Difference]: Start difference. First operand has 289 places, 386 transitions, 4655 flow. Second operand 9 states and 218 transitions. [2024-06-14 14:08:54,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 411 transitions, 5589 flow [2024-06-14 14:08:56,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 411 transitions, 5429 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:56,783 INFO L231 Difference]: Finished difference. Result has 292 places, 388 transitions, 4785 flow [2024-06-14 14:08:56,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4785, PETRI_PLACES=292, PETRI_TRANSITIONS=388} [2024-06-14 14:08:56,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-14 14:08:56,784 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 388 transitions, 4785 flow [2024-06-14 14:08:56,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:56,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:56,784 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 14:08:56,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 14:08:56,785 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 14:08:56,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:56,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1800939648, now seen corresponding path program 5 times [2024-06-14 14:08:56,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:56,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385164185] [2024-06-14 14:08:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:56,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:56,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:56,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385164185] [2024-06-14 14:08:56,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385164185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:56,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:56,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:56,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407498647] [2024-06-14 14:08:56,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:56,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:56,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:56,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:56,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:57,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:08:57,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 388 transitions, 4785 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:57,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:57,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:08:57,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:58,095 INFO L124 PetriNetUnfolderBase]: 4005/6923 cut-off events. [2024-06-14 14:08:58,096 INFO L125 PetriNetUnfolderBase]: For 837961/837961 co-relation queries the response was YES. [2024-06-14 14:08:58,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48712 conditions, 6923 events. 4005/6923 cut-off events. For 837961/837961 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 49122 event pairs, 1157 based on Foata normal form. 12/6926 useless extension candidates. Maximal degree in co-relation 48575. Up to 5761 conditions per place. [2024-06-14 14:08:58,181 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 293 selfloop transitions, 118 changer transitions 0/419 dead transitions. [2024-06-14 14:08:58,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 419 transitions, 6011 flow [2024-06-14 14:08:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-14 14:08:58,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710594315245479 [2024-06-14 14:08:58,182 INFO L175 Difference]: Start difference. First operand has 292 places, 388 transitions, 4785 flow. Second operand 9 states and 221 transitions. [2024-06-14 14:08:58,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 419 transitions, 6011 flow [2024-06-14 14:09:00,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 419 transitions, 5745 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:00,995 INFO L231 Difference]: Finished difference. Result has 294 places, 392 transitions, 4893 flow [2024-06-14 14:09:00,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4519, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4893, PETRI_PLACES=294, PETRI_TRANSITIONS=392} [2024-06-14 14:09:00,996 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 14:09:00,996 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 392 transitions, 4893 flow [2024-06-14 14:09:00,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:00,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:00,996 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 14:09:00,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 14:09:00,996 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 14:09:00,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:00,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1050524348, now seen corresponding path program 6 times [2024-06-14 14:09:00,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:00,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112531872] [2024-06-14 14:09:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:00,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:01,198 INFO 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 14:09:01,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:01,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112531872] [2024-06-14 14:09:01,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112531872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:01,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:01,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:01,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936366487] [2024-06-14 14:09:01,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:01,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:01,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:01,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:01,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:01,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:01,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 392 transitions, 4893 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:01,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:01,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:01,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:02,312 INFO L124 PetriNetUnfolderBase]: 3969/6871 cut-off events. [2024-06-14 14:09:02,312 INFO L125 PetriNetUnfolderBase]: For 795683/795683 co-relation queries the response was YES. [2024-06-14 14:09:02,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46742 conditions, 6871 events. 3969/6871 cut-off events. For 795683/795683 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 48764 event pairs, 1153 based on Foata normal form. 16/6878 useless extension candidates. Maximal degree in co-relation 46604. Up to 5953 conditions per place. [2024-06-14 14:09:02,398 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 290 selfloop transitions, 118 changer transitions 0/416 dead transitions. [2024-06-14 14:09:02,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 416 transitions, 5779 flow [2024-06-14 14:09:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:02,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-14 14:09:02,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534883720930233 [2024-06-14 14:09:02,399 INFO L175 Difference]: Start difference. First operand has 294 places, 392 transitions, 4893 flow. Second operand 10 states and 238 transitions. [2024-06-14 14:09:02,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 416 transitions, 5779 flow [2024-06-14 14:09:05,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 416 transitions, 5472 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:05,051 INFO L231 Difference]: Finished difference. Result has 297 places, 392 transitions, 4828 flow [2024-06-14 14:09:05,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4586, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4828, PETRI_PLACES=297, PETRI_TRANSITIONS=392} [2024-06-14 14:09:05,051 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-14 14:09:05,052 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 392 transitions, 4828 flow [2024-06-14 14:09:05,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:05,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:05,052 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 14:09:05,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 14:09:05,052 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 14:09:05,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1036226652, now seen corresponding path program 1 times [2024-06-14 14:09:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:05,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413543753] [2024-06-14 14:09:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:05,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:05,252 INFO 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 14:09:05,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:05,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413543753] [2024-06-14 14:09:05,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413543753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:05,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:05,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:05,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721352365] [2024-06-14 14:09:05,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:05,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:05,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:05,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:05,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:05,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:05,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 392 transitions, 4828 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:05,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:05,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:05,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:06,413 INFO L124 PetriNetUnfolderBase]: 4055/7003 cut-off events. [2024-06-14 14:09:06,414 INFO L125 PetriNetUnfolderBase]: For 828375/828375 co-relation queries the response was YES. [2024-06-14 14:09:06,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48234 conditions, 7003 events. 4055/7003 cut-off events. For 828375/828375 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 49737 event pairs, 1156 based on Foata normal form. 12/7006 useless extension candidates. Maximal degree in co-relation 48096. Up to 5837 conditions per place. [2024-06-14 14:09:06,504 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 286 selfloop transitions, 129 changer transitions 0/423 dead transitions. [2024-06-14 14:09:06,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 423 transitions, 6038 flow [2024-06-14 14:09:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-14 14:09:06,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-14 14:09:06,506 INFO L175 Difference]: Start difference. First operand has 297 places, 392 transitions, 4828 flow. Second operand 10 states and 242 transitions. [2024-06-14 14:09:06,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 423 transitions, 6038 flow [2024-06-14 14:09:09,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 423 transitions, 5777 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 14:09:09,300 INFO L231 Difference]: Finished difference. Result has 298 places, 395 transitions, 4934 flow [2024-06-14 14:09:09,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4934, PETRI_PLACES=298, PETRI_TRANSITIONS=395} [2024-06-14 14:09:09,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 14:09:09,301 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 395 transitions, 4934 flow [2024-06-14 14:09:09,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:09,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:09,301 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 14:09:09,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 14:09:09,301 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 14:09:09,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:09,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1744876772, now seen corresponding path program 2 times [2024-06-14 14:09:09,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:09,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187796969] [2024-06-14 14:09:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:09,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:09,503 INFO 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 14:09:09,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:09,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187796969] [2024-06-14 14:09:09,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187796969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:09,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:09,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:09,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91863261] [2024-06-14 14:09:09,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:09,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:09,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:09,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:09,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:09,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:09,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 395 transitions, 4934 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:09,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:09,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:09,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:10,661 INFO L124 PetriNetUnfolderBase]: 4095/7075 cut-off events. [2024-06-14 14:09:10,662 INFO L125 PetriNetUnfolderBase]: For 848106/848106 co-relation queries the response was YES. [2024-06-14 14:09:10,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49028 conditions, 7075 events. 4095/7075 cut-off events. For 848106/848106 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 50401 event pairs, 1177 based on Foata normal form. 12/7078 useless extension candidates. Maximal degree in co-relation 48889. Up to 6079 conditions per place. [2024-06-14 14:09:10,754 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 298 selfloop transitions, 118 changer transitions 0/424 dead transitions. [2024-06-14 14:09:10,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 424 transitions, 5916 flow [2024-06-14 14:09:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-14 14:09:10,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-14 14:09:10,755 INFO L175 Difference]: Start difference. First operand has 298 places, 395 transitions, 4934 flow. Second operand 10 states and 242 transitions. [2024-06-14 14:09:10,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 424 transitions, 5916 flow [2024-06-14 14:09:13,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 424 transitions, 5701 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:13,417 INFO L231 Difference]: Finished difference. Result has 302 places, 397 transitions, 5032 flow [2024-06-14 14:09:13,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4719, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5032, PETRI_PLACES=302, PETRI_TRANSITIONS=397} [2024-06-14 14:09:13,418 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-14 14:09:13,418 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 397 transitions, 5032 flow [2024-06-14 14:09:13,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:13,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:13,418 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 14:09:13,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 14:09:13,419 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 14:09:13,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:13,419 INFO L85 PathProgramCache]: Analyzing trace with hash 123059428, now seen corresponding path program 3 times [2024-06-14 14:09:13,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:13,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951450370] [2024-06-14 14:09:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:13,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:13,622 INFO 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 14:09:13,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:13,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951450370] [2024-06-14 14:09:13,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951450370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:13,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:13,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699803605] [2024-06-14 14:09:13,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:13,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:13,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:13,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:13,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:13,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 397 transitions, 5032 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:13,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:13,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:13,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:14,877 INFO L124 PetriNetUnfolderBase]: 4148/7164 cut-off events. [2024-06-14 14:09:14,878 INFO L125 PetriNetUnfolderBase]: For 875764/875764 co-relation queries the response was YES. [2024-06-14 14:09:14,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50370 conditions, 7164 events. 4148/7164 cut-off events. For 875764/875764 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 51081 event pairs, 1183 based on Foata normal form. 12/7167 useless extension candidates. Maximal degree in co-relation 50229. Up to 5606 conditions per place. [2024-06-14 14:09:14,957 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 282 selfloop transitions, 138 changer transitions 0/428 dead transitions. [2024-06-14 14:09:14,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 428 transitions, 6294 flow [2024-06-14 14:09:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 14:09:14,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-14 14:09:14,959 INFO L175 Difference]: Start difference. First operand has 302 places, 397 transitions, 5032 flow. Second operand 9 states and 222 transitions. [2024-06-14 14:09:14,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 428 transitions, 6294 flow [2024-06-14 14:09:17,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 428 transitions, 6001 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 14:09:17,442 INFO L231 Difference]: Finished difference. Result has 303 places, 399 transitions, 5102 flow [2024-06-14 14:09:17,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4739, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5102, PETRI_PLACES=303, PETRI_TRANSITIONS=399} [2024-06-14 14:09:17,443 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-14 14:09:17,443 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 399 transitions, 5102 flow [2024-06-14 14:09:17,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:17,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:17,443 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] [2024-06-14 14:09:17,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 14:09:17,443 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 14:09:17,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash -19796328, now seen corresponding path program 1 times [2024-06-14 14:09:17,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:17,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660932423] [2024-06-14 14:09:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:17,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:17,606 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 14:09:17,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:17,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660932423] [2024-06-14 14:09:17,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660932423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:17,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:17,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:09:17,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934529511] [2024-06-14 14:09:17,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:17,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:09:17,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:17,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:09:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:09:17,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:17,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 399 transitions, 5102 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:17,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:17,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:17,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:18,733 INFO L124 PetriNetUnfolderBase]: 4156/7188 cut-off events. [2024-06-14 14:09:18,733 INFO L125 PetriNetUnfolderBase]: For 841075/841075 co-relation queries the response was YES. [2024-06-14 14:09:18,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50648 conditions, 7188 events. 4156/7188 cut-off events. For 841075/841075 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51326 event pairs, 1197 based on Foata normal form. 2/7186 useless extension candidates. Maximal degree in co-relation 50506. Up to 6459 conditions per place. [2024-06-14 14:09:18,827 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 367 selfloop transitions, 43 changer transitions 0/418 dead transitions. [2024-06-14 14:09:18,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 418 transitions, 6026 flow [2024-06-14 14:09:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 14:09:18,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 14:09:18,828 INFO L175 Difference]: Start difference. First operand has 303 places, 399 transitions, 5102 flow. Second operand 6 states and 152 transitions. [2024-06-14 14:09:18,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 418 transitions, 6026 flow [2024-06-14 14:09:21,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 418 transitions, 5806 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:21,851 INFO L231 Difference]: Finished difference. Result has 303 places, 401 transitions, 5039 flow [2024-06-14 14:09:21,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4882, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5039, PETRI_PLACES=303, PETRI_TRANSITIONS=401} [2024-06-14 14:09:21,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-14 14:09:21,852 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 401 transitions, 5039 flow [2024-06-14 14:09:21,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:21,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:21,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:21,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 14:09:21,852 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 14:09:21,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:21,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1329539046, now seen corresponding path program 2 times [2024-06-14 14:09:21,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:21,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771287205] [2024-06-14 14:09:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:21,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:22,013 INFO 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 14:09:22,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:22,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771287205] [2024-06-14 14:09:22,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771287205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:22,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:22,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:09:22,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994731239] [2024-06-14 14:09:22,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:22,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:09:22,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:09:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:09:22,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:22,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 401 transitions, 5039 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:22,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:22,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:22,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:23,207 INFO L124 PetriNetUnfolderBase]: 4177/7223 cut-off events. [2024-06-14 14:09:23,207 INFO L125 PetriNetUnfolderBase]: For 863761/863761 co-relation queries the response was YES. [2024-06-14 14:09:23,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51004 conditions, 7223 events. 4177/7223 cut-off events. For 863761/863761 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 51597 event pairs, 1198 based on Foata normal form. 2/7221 useless extension candidates. Maximal degree in co-relation 50861. Up to 6445 conditions per place. [2024-06-14 14:09:23,302 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 364 selfloop transitions, 49 changer transitions 0/421 dead transitions. [2024-06-14 14:09:23,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 421 transitions, 6239 flow [2024-06-14 14:09:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:09:23,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775193798449613 [2024-06-14 14:09:23,303 INFO L175 Difference]: Start difference. First operand has 303 places, 401 transitions, 5039 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:09:23,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 421 transitions, 6239 flow [2024-06-14 14:09:26,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 421 transitions, 6104 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:26,283 INFO L231 Difference]: Finished difference. Result has 305 places, 405 transitions, 5144 flow [2024-06-14 14:09:26,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4904, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5144, PETRI_PLACES=305, PETRI_TRANSITIONS=405} [2024-06-14 14:09:26,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-14 14:09:26,284 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 405 transitions, 5144 flow [2024-06-14 14:09:26,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:26,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:26,284 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 14:09:26,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 14:09:26,284 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 14:09:26,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:26,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1223517182, now seen corresponding path program 3 times [2024-06-14 14:09:26,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:26,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854821727] [2024-06-14 14:09:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:26,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:26,447 INFO 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 14:09:26,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:26,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854821727] [2024-06-14 14:09:26,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854821727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:26,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:26,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:09:26,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629911554] [2024-06-14 14:09:26,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:26,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:09:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:09:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:09:26,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:26,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 405 transitions, 5144 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:26,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:26,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:26,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:27,606 INFO L124 PetriNetUnfolderBase]: 4172/7215 cut-off events. [2024-06-14 14:09:27,607 INFO L125 PetriNetUnfolderBase]: For 869257/869257 co-relation queries the response was YES. [2024-06-14 14:09:27,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50854 conditions, 7215 events. 4172/7215 cut-off events. For 869257/869257 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 51533 event pairs, 1194 based on Foata normal form. 2/7210 useless extension candidates. Maximal degree in co-relation 50710. Up to 6483 conditions per place. [2024-06-14 14:09:27,702 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 371 selfloop transitions, 46 changer transitions 0/425 dead transitions. [2024-06-14 14:09:27,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 425 transitions, 6028 flow [2024-06-14 14:09:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 14:09:27,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007751937984496 [2024-06-14 14:09:27,703 INFO L175 Difference]: Start difference. First operand has 305 places, 405 transitions, 5144 flow. Second operand 6 states and 155 transitions. [2024-06-14 14:09:27,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 425 transitions, 6028 flow [2024-06-14 14:09:31,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 425 transitions, 5882 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-14 14:09:31,129 INFO L231 Difference]: Finished difference. Result has 309 places, 405 transitions, 5095 flow [2024-06-14 14:09:31,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4998, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5095, PETRI_PLACES=309, PETRI_TRANSITIONS=405} [2024-06-14 14:09:31,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-14 14:09:31,129 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 405 transitions, 5095 flow [2024-06-14 14:09:31,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:31,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:31,130 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 14:09:31,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 14:09:31,130 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 14:09:31,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash -413989406, now seen corresponding path program 4 times [2024-06-14 14:09:31,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:31,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066906153] [2024-06-14 14:09:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:31,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:31,295 INFO 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 14:09:31,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:31,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066906153] [2024-06-14 14:09:31,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066906153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:31,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:31,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:09:31,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932802926] [2024-06-14 14:09:31,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:31,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:09:31,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:31,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:09:31,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:09:31,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:31,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 405 transitions, 5095 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:31,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:31,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:31,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:32,442 INFO L124 PetriNetUnfolderBase]: 4180/7227 cut-off events. [2024-06-14 14:09:32,442 INFO L125 PetriNetUnfolderBase]: For 884652/884652 co-relation queries the response was YES. [2024-06-14 14:09:32,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51138 conditions, 7227 events. 4180/7227 cut-off events. For 884652/884652 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 51683 event pairs, 1190 based on Foata normal form. 2/7222 useless extension candidates. Maximal degree in co-relation 50992. Up to 6469 conditions per place. [2024-06-14 14:09:32,534 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 368 selfloop transitions, 49 changer transitions 0/425 dead transitions. [2024-06-14 14:09:32,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 425 transitions, 6043 flow [2024-06-14 14:09:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 14:09:32,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852713178294574 [2024-06-14 14:09:32,535 INFO L175 Difference]: Start difference. First operand has 309 places, 405 transitions, 5095 flow. Second operand 6 states and 151 transitions. [2024-06-14 14:09:32,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 425 transitions, 6043 flow [2024-06-14 14:09:36,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 425 transitions, 5928 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:36,314 INFO L231 Difference]: Finished difference. Result has 310 places, 407 transitions, 5157 flow [2024-06-14 14:09:36,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4980, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5157, PETRI_PLACES=310, PETRI_TRANSITIONS=407} [2024-06-14 14:09:36,314 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-14 14:09:36,314 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 407 transitions, 5157 flow [2024-06-14 14:09:36,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:36,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:36,315 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 14:09:36,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 14:09:36,315 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 14:09:36,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:36,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2035806750, now seen corresponding path program 5 times [2024-06-14 14:09:36,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:36,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238754742] [2024-06-14 14:09:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:36,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:36,478 INFO 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 14:09:36,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:36,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238754742] [2024-06-14 14:09:36,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238754742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:36,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:36,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:09:36,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119345235] [2024-06-14 14:09:36,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:36,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:09:36,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:36,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:09:36,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:09:36,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:36,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 407 transitions, 5157 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:36,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:36,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:36,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:37,716 INFO L124 PetriNetUnfolderBase]: 4188/7249 cut-off events. [2024-06-14 14:09:37,716 INFO L125 PetriNetUnfolderBase]: For 903185/903185 co-relation queries the response was YES. [2024-06-14 14:09:37,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51501 conditions, 7249 events. 4188/7249 cut-off events. For 903185/903185 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 52072 event pairs, 1178 based on Foata normal form. 2/7242 useless extension candidates. Maximal degree in co-relation 51354. Up to 6370 conditions per place. [2024-06-14 14:09:37,803 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 359 selfloop transitions, 57 changer transitions 0/424 dead transitions. [2024-06-14 14:09:37,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 424 transitions, 6344 flow [2024-06-14 14:09:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 14:09:37,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562015503875969 [2024-06-14 14:09:37,804 INFO L175 Difference]: Start difference. First operand has 310 places, 407 transitions, 5157 flow. Second operand 6 states and 145 transitions. [2024-06-14 14:09:37,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 424 transitions, 6344 flow [2024-06-14 14:09:40,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 424 transitions, 6189 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:40,668 INFO L231 Difference]: Finished difference. Result has 312 places, 410 transitions, 5236 flow [2024-06-14 14:09:40,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5002, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5236, PETRI_PLACES=312, PETRI_TRANSITIONS=410} [2024-06-14 14:09:40,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-14 14:09:40,669 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 410 transitions, 5236 flow [2024-06-14 14:09:40,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:40,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:40,669 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 14:09:40,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 14:09:40,670 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 14:09:40,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:40,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2029140510, now seen corresponding path program 6 times [2024-06-14 14:09:40,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:40,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637073039] [2024-06-14 14:09:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:40,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:40,902 INFO 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 14:09:40,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:40,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637073039] [2024-06-14 14:09:40,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637073039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:40,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:40,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:09:40,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693593205] [2024-06-14 14:09:40,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:40,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:09:40,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:40,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:09:40,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:09:40,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:40,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 410 transitions, 5236 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:40,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:40,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:40,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:42,070 INFO L124 PetriNetUnfolderBase]: 4183/7238 cut-off events. [2024-06-14 14:09:42,070 INFO L125 PetriNetUnfolderBase]: For 908006/908006 co-relation queries the response was YES. [2024-06-14 14:09:42,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51336 conditions, 7238 events. 4183/7238 cut-off events. For 908006/908006 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 51910 event pairs, 1178 based on Foata normal form. 2/7231 useless extension candidates. Maximal degree in co-relation 51188. Up to 6366 conditions per place. [2024-06-14 14:09:42,166 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 359 selfloop transitions, 56 changer transitions 0/423 dead transitions. [2024-06-14 14:09:42,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 423 transitions, 6096 flow [2024-06-14 14:09:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 14:09:42,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 14:09:42,168 INFO L175 Difference]: Start difference. First operand has 312 places, 410 transitions, 5236 flow. Second operand 6 states and 144 transitions. [2024-06-14 14:09:42,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 423 transitions, 6096 flow [2024-06-14 14:09:45,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 423 transitions, 5922 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-14 14:09:45,864 INFO L231 Difference]: Finished difference. Result has 316 places, 410 transitions, 5179 flow [2024-06-14 14:09:45,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5179, PETRI_PLACES=316, PETRI_TRANSITIONS=410} [2024-06-14 14:09:45,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-14 14:09:45,865 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 410 transitions, 5179 flow [2024-06-14 14:09:45,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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 14:09:45,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:45,865 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 14:09:45,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 14:09:45,865 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 14:09:45,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:45,865 INFO L85 PathProgramCache]: Analyzing trace with hash 480049738, now seen corresponding path program 1 times [2024-06-14 14:09:45,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:45,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738260301] [2024-06-14 14:09:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:45,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:46,091 INFO 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 14:09:46,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:46,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738260301] [2024-06-14 14:09:46,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738260301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:46,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:46,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:46,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336708164] [2024-06-14 14:09:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:46,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:46,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:46,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:46,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 410 transitions, 5179 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:46,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:46,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:46,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:47,423 INFO L124 PetriNetUnfolderBase]: 4407/7584 cut-off events. [2024-06-14 14:09:47,423 INFO L125 PetriNetUnfolderBase]: For 1158060/1158060 co-relation queries the response was YES. [2024-06-14 14:09:47,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57582 conditions, 7584 events. 4407/7584 cut-off events. For 1158060/1158060 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 54532 event pairs, 1053 based on Foata normal form. 12/7592 useless extension candidates. Maximal degree in co-relation 57432. Up to 5993 conditions per place. [2024-06-14 14:09:47,528 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 343 selfloop transitions, 104 changer transitions 0/455 dead transitions. [2024-06-14 14:09:47,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 455 transitions, 6963 flow [2024-06-14 14:09:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-14 14:09:47,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 14:09:47,530 INFO L175 Difference]: Start difference. First operand has 316 places, 410 transitions, 5179 flow. Second operand 9 states and 228 transitions. [2024-06-14 14:09:47,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 455 transitions, 6963 flow [2024-06-14 14:09:51,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 455 transitions, 6799 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:51,172 INFO L231 Difference]: Finished difference. Result has 320 places, 418 transitions, 5490 flow [2024-06-14 14:09:51,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5015, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5490, PETRI_PLACES=320, PETRI_TRANSITIONS=418} [2024-06-14 14:09:51,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-14 14:09:51,172 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 418 transitions, 5490 flow [2024-06-14 14:09:51,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:51,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:51,173 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 14:09:51,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 14:09:51,173 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 14:09:51,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash -153439568, now seen corresponding path program 2 times [2024-06-14 14:09:51,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:51,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610934232] [2024-06-14 14:09:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:51,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:51,351 INFO 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 14:09:51,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:51,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610934232] [2024-06-14 14:09:51,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610934232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:51,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:51,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:51,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552199426] [2024-06-14 14:09:51,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:51,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:51,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:51,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:51,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:51,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:51,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 418 transitions, 5490 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:51,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:51,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:51,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:52,998 INFO L124 PetriNetUnfolderBase]: 4450/7684 cut-off events. [2024-06-14 14:09:52,998 INFO L125 PetriNetUnfolderBase]: For 1196288/1196288 co-relation queries the response was YES. [2024-06-14 14:09:53,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58493 conditions, 7684 events. 4450/7684 cut-off events. For 1196288/1196288 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 55510 event pairs, 1288 based on Foata normal form. 16/7696 useless extension candidates. Maximal degree in co-relation 58342. Up to 6703 conditions per place. [2024-06-14 14:09:53,091 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 342 selfloop transitions, 92 changer transitions 0/442 dead transitions. [2024-06-14 14:09:53,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 442 transitions, 6484 flow [2024-06-14 14:09:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:09:53,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-14 14:09:53,092 INFO L175 Difference]: Start difference. First operand has 320 places, 418 transitions, 5490 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:09:53,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 442 transitions, 6484 flow [2024-06-14 14:09:56,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 442 transitions, 6301 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:56,476 INFO L231 Difference]: Finished difference. Result has 324 places, 420 transitions, 5561 flow [2024-06-14 14:09:56,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5309, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5561, PETRI_PLACES=324, PETRI_TRANSITIONS=420} [2024-06-14 14:09:56,477 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-14 14:09:56,477 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 420 transitions, 5561 flow [2024-06-14 14:09:56,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:56,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:56,477 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 14:09:56,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 14:09:56,477 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 14:09:56,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash -153443288, now seen corresponding path program 3 times [2024-06-14 14:09:56,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:56,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592645672] [2024-06-14 14:09:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:56,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:56,665 INFO 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 14:09:56,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:56,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592645672] [2024-06-14 14:09:56,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592645672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:56,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:56,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066304650] [2024-06-14 14:09:56,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:56,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:56,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:09:56,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 420 transitions, 5561 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:56,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:56,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:09:56,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:58,011 INFO L124 PetriNetUnfolderBase]: 4464/7716 cut-off events. [2024-06-14 14:09:58,012 INFO L125 PetriNetUnfolderBase]: For 1158529/1158529 co-relation queries the response was YES. [2024-06-14 14:09:58,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58129 conditions, 7716 events. 4464/7716 cut-off events. For 1158529/1158529 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55768 event pairs, 1281 based on Foata normal form. 12/7724 useless extension candidates. Maximal degree in co-relation 57976. Up to 6556 conditions per place. [2024-06-14 14:09:58,119 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 350 selfloop transitions, 92 changer transitions 0/450 dead transitions. [2024-06-14 14:09:58,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 450 transitions, 6900 flow [2024-06-14 14:09:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:09:58,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843023255813954 [2024-06-14 14:09:58,120 INFO L175 Difference]: Start difference. First operand has 324 places, 420 transitions, 5561 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:09:58,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 450 transitions, 6900 flow [2024-06-14 14:10:02,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 450 transitions, 6674 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 14:10:02,083 INFO L231 Difference]: Finished difference. Result has 327 places, 424 transitions, 5702 flow [2024-06-14 14:10:02,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5335, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5702, PETRI_PLACES=327, PETRI_TRANSITIONS=424} [2024-06-14 14:10:02,083 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-14 14:10:02,083 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 424 transitions, 5702 flow [2024-06-14 14:10:02,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:02,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:02,084 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 14:10:02,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 14:10:02,084 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 14:10:02,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash 28143844, now seen corresponding path program 4 times [2024-06-14 14:10:02,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:02,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725320962] [2024-06-14 14:10:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:02,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:02,254 INFO 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 14:10:02,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:02,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725320962] [2024-06-14 14:10:02,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725320962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:02,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:02,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:02,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381519643] [2024-06-14 14:10:02,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:02,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:02,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:02,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:02,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:02,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:10:02,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 424 transitions, 5702 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:02,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:02,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:10:02,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:03,635 INFO L124 PetriNetUnfolderBase]: 4520/7774 cut-off events. [2024-06-14 14:10:03,636 INFO L125 PetriNetUnfolderBase]: For 1209715/1209715 co-relation queries the response was YES. [2024-06-14 14:10:03,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58860 conditions, 7774 events. 4520/7774 cut-off events. For 1209715/1209715 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 56182 event pairs, 1321 based on Foata normal form. 16/7771 useless extension candidates. Maximal degree in co-relation 58705. Up to 6817 conditions per place. [2024-06-14 14:10:03,763 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 334 selfloop transitions, 99 changer transitions 0/441 dead transitions. [2024-06-14 14:10:03,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 441 transitions, 6678 flow [2024-06-14 14:10:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:10:03,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:10:03,765 INFO L175 Difference]: Start difference. First operand has 327 places, 424 transitions, 5702 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:10:03,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 441 transitions, 6678 flow [2024-06-14 14:10:07,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 441 transitions, 6341 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:07,559 INFO L231 Difference]: Finished difference. Result has 327 places, 426 transitions, 5635 flow [2024-06-14 14:10:07,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5365, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5635, PETRI_PLACES=327, PETRI_TRANSITIONS=426} [2024-06-14 14:10:07,559 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-14 14:10:07,560 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 426 transitions, 5635 flow [2024-06-14 14:10:07,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:07,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:07,560 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 14:10:07,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 14:10:07,561 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 14:10:07,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:07,561 INFO L85 PathProgramCache]: Analyzing trace with hash 687668200, now seen corresponding path program 5 times [2024-06-14 14:10:07,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:07,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220939173] [2024-06-14 14:10:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:07,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:07,744 INFO 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 14:10:07,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:07,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220939173] [2024-06-14 14:10:07,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220939173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:07,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:07,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:07,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543474676] [2024-06-14 14:10:07,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:07,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:07,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:07,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:10:07,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 426 transitions, 5635 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:07,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:07,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:10:07,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:09,259 INFO L124 PetriNetUnfolderBase]: 4576/7882 cut-off events. [2024-06-14 14:10:09,260 INFO L125 PetriNetUnfolderBase]: For 1227916/1227916 co-relation queries the response was YES. [2024-06-14 14:10:09,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58963 conditions, 7882 events. 4576/7882 cut-off events. For 1227916/1227916 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 57172 event pairs, 1345 based on Foata normal form. 16/7879 useless extension candidates. Maximal degree in co-relation 58808. Up to 6905 conditions per place. [2024-06-14 14:10:09,354 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 344 selfloop transitions, 91 changer transitions 0/443 dead transitions. [2024-06-14 14:10:09,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 443 transitions, 6619 flow [2024-06-14 14:10:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:10:09,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681063122923588 [2024-06-14 14:10:09,355 INFO L175 Difference]: Start difference. First operand has 327 places, 426 transitions, 5635 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:10:09,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 443 transitions, 6619 flow [2024-06-14 14:10:12,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 443 transitions, 6373 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:12,824 INFO L231 Difference]: Finished difference. Result has 329 places, 428 transitions, 5647 flow [2024-06-14 14:10:12,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5389, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5647, PETRI_PLACES=329, PETRI_TRANSITIONS=428} [2024-06-14 14:10:12,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-14 14:10:12,825 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 428 transitions, 5647 flow [2024-06-14 14:10:12,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:12,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:12,826 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 14:10:12,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 14:10:12,826 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 14:10:12,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:12,826 INFO L85 PathProgramCache]: Analyzing trace with hash -732060434, now seen corresponding path program 6 times [2024-06-14 14:10:12,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:12,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878958000] [2024-06-14 14:10:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:12,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:12,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:12,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878958000] [2024-06-14 14:10:12,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878958000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:12,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:12,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:12,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741796601] [2024-06-14 14:10:12,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:12,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:12,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:12,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:12,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:13,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:10:13,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 428 transitions, 5647 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:13,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:13,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:10:13,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:14,344 INFO L124 PetriNetUnfolderBase]: 4643/7989 cut-off events. [2024-06-14 14:10:14,344 INFO L125 PetriNetUnfolderBase]: For 1251948/1251948 co-relation queries the response was YES. [2024-06-14 14:10:14,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60171 conditions, 7989 events. 4643/7989 cut-off events. For 1251948/1251948 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 58055 event pairs, 1339 based on Foata normal form. 12/7982 useless extension candidates. Maximal degree in co-relation 60015. Up to 6757 conditions per place. [2024-06-14 14:10:14,452 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 352 selfloop transitions, 92 changer transitions 0/452 dead transitions. [2024-06-14 14:10:14,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 452 transitions, 7024 flow [2024-06-14 14:10:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:10:14,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780730897009967 [2024-06-14 14:10:14,453 INFO L175 Difference]: Start difference. First operand has 329 places, 428 transitions, 5647 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:10:14,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 452 transitions, 7024 flow [2024-06-14 14:10:17,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 452 transitions, 6790 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:17,954 INFO L231 Difference]: Finished difference. Result has 332 places, 433 transitions, 5832 flow [2024-06-14 14:10:17,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5413, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5832, PETRI_PLACES=332, PETRI_TRANSITIONS=433} [2024-06-14 14:10:17,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-14 14:10:17,954 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 433 transitions, 5832 flow [2024-06-14 14:10:17,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:17,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:17,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:17,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 14:10:17,955 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 14:10:17,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:17,955 INFO L85 PathProgramCache]: Analyzing trace with hash -524986262, now seen corresponding path program 1 times [2024-06-14 14:10:17,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:17,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298860278] [2024-06-14 14:10:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:17,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:18,128 INFO 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 14:10:18,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:18,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298860278] [2024-06-14 14:10:18,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298860278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:18,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:18,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:18,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528103311] [2024-06-14 14:10:18,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:18,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:18,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:18,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:18,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:18,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:10:18,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 433 transitions, 5832 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:18,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:18,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:10:18,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:19,493 INFO L124 PetriNetUnfolderBase]: 4683/8071 cut-off events. [2024-06-14 14:10:19,493 INFO L125 PetriNetUnfolderBase]: For 1277631/1277631 co-relation queries the response was YES. [2024-06-14 14:10:19,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60782 conditions, 8071 events. 4683/8071 cut-off events. For 1277631/1277631 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 58880 event pairs, 1311 based on Foata normal form. 12/8064 useless extension candidates. Maximal degree in co-relation 60624. Up to 6878 conditions per place. [2024-06-14 14:10:19,612 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 337 selfloop transitions, 108 changer transitions 0/453 dead transitions. [2024-06-14 14:10:19,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 453 transitions, 6856 flow [2024-06-14 14:10:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:10:19,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 14:10:19,613 INFO L175 Difference]: Start difference. First operand has 332 places, 433 transitions, 5832 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:10:19,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 453 transitions, 6856 flow [2024-06-14 14:10:23,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 453 transitions, 6663 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 14:10:23,343 INFO L231 Difference]: Finished difference. Result has 336 places, 435 transitions, 5938 flow [2024-06-14 14:10:23,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5938, PETRI_PLACES=336, PETRI_TRANSITIONS=435} [2024-06-14 14:10:23,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-14 14:10:23,344 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 435 transitions, 5938 flow [2024-06-14 14:10:23,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:23,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:23,345 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 14:10:23,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 14:10:23,345 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 14:10:23,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:23,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1100440344, now seen corresponding path program 7 times [2024-06-14 14:10:23,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:23,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341622976] [2024-06-14 14:10:23,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:23,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:23,511 INFO 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 14:10:23,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:23,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341622976] [2024-06-14 14:10:23,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341622976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:23,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:23,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304688345] [2024-06-14 14:10:23,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:23,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:23,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:23,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:23,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:23,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:10:23,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 435 transitions, 5938 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:23,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:23,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:10:23,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:25,003 INFO L124 PetriNetUnfolderBase]: 4723/8138 cut-off events. [2024-06-14 14:10:25,004 INFO L125 PetriNetUnfolderBase]: For 1294363/1294363 co-relation queries the response was YES. [2024-06-14 14:10:25,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61167 conditions, 8138 events. 4723/8138 cut-off events. For 1294363/1294363 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 59234 event pairs, 1138 based on Foata normal form. 12/8146 useless extension candidates. Maximal degree in co-relation 61007. Up to 6775 conditions per place. [2024-06-14 14:10:25,111 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 354 selfloop transitions, 101 changer transitions 2/465 dead transitions. [2024-06-14 14:10:25,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 465 transitions, 7195 flow [2024-06-14 14:10:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:25,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 14:10:25,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6112956810631229 [2024-06-14 14:10:25,112 INFO L175 Difference]: Start difference. First operand has 336 places, 435 transitions, 5938 flow. Second operand 7 states and 184 transitions. [2024-06-14 14:10:25,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 465 transitions, 7195 flow [2024-06-14 14:10:29,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 465 transitions, 6916 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:29,217 INFO L231 Difference]: Finished difference. Result has 338 places, 435 transitions, 5881 flow [2024-06-14 14:10:29,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5881, PETRI_PLACES=338, PETRI_TRANSITIONS=435} [2024-06-14 14:10:29,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-14 14:10:29,218 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 435 transitions, 5881 flow [2024-06-14 14:10:29,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:29,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:29,218 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 14:10:29,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 14:10:29,218 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 14:10:29,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash -186805434, now seen corresponding path program 8 times [2024-06-14 14:10:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:29,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169170474] [2024-06-14 14:10:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:29,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:29,388 INFO 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 14:10:29,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:29,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169170474] [2024-06-14 14:10:29,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169170474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:29,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:29,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:29,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560127065] [2024-06-14 14:10:29,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:29,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:29,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:29,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:29,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:10:29,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 435 transitions, 5881 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:29,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:29,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:10:29,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:30,814 INFO L124 PetriNetUnfolderBase]: 4755/8175 cut-off events. [2024-06-14 14:10:30,814 INFO L125 PetriNetUnfolderBase]: For 1340884/1340884 co-relation queries the response was YES. [2024-06-14 14:10:30,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61309 conditions, 8175 events. 4755/8175 cut-off events. For 1340884/1340884 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 59502 event pairs, 1345 based on Foata normal form. 16/8187 useless extension candidates. Maximal degree in co-relation 61148. Up to 7194 conditions per place. [2024-06-14 14:10:30,933 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 359 selfloop transitions, 89 changer transitions 2/458 dead transitions. [2024-06-14 14:10:30,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 458 transitions, 6876 flow [2024-06-14 14:10:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:10:30,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-06-14 14:10:30,934 INFO L175 Difference]: Start difference. First operand has 338 places, 435 transitions, 5881 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:10:30,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 458 transitions, 6876 flow [2024-06-14 14:10:35,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 458 transitions, 6700 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:10:35,267 INFO L231 Difference]: Finished difference. Result has 341 places, 435 transitions, 5901 flow [2024-06-14 14:10:35,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5706, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5901, PETRI_PLACES=341, PETRI_TRANSITIONS=435} [2024-06-14 14:10:35,267 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-14 14:10:35,267 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 435 transitions, 5901 flow [2024-06-14 14:10:35,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:35,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:35,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:35,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 14:10:35,268 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 14:10:35,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:35,268 INFO L85 PathProgramCache]: Analyzing trace with hash -181443054, now seen corresponding path program 9 times [2024-06-14 14:10:35,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:35,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509351023] [2024-06-14 14:10:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:35,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:35,431 INFO 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 14:10:35,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:35,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509351023] [2024-06-14 14:10:35,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509351023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:35,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:35,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:35,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789821864] [2024-06-14 14:10:35,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:35,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:35,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:35,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:35,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:10:35,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 435 transitions, 5901 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:35,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:35,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:10:35,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:36,843 INFO L124 PetriNetUnfolderBase]: 4778/8210 cut-off events. [2024-06-14 14:10:36,843 INFO L125 PetriNetUnfolderBase]: For 1364081/1364081 co-relation queries the response was YES. [2024-06-14 14:10:36,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61611 conditions, 8210 events. 4778/8210 cut-off events. For 1364081/1364081 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 59800 event pairs, 1349 based on Foata normal form. 16/8222 useless extension candidates. Maximal degree in co-relation 61449. Up to 7234 conditions per place. [2024-06-14 14:10:36,961 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 357 selfloop transitions, 89 changer transitions 1/455 dead transitions. [2024-06-14 14:10:36,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 455 transitions, 6885 flow [2024-06-14 14:10:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:10:36,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574750830564784 [2024-06-14 14:10:36,962 INFO L175 Difference]: Start difference. First operand has 341 places, 435 transitions, 5901 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:10:36,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 455 transitions, 6885 flow [2024-06-14 14:10:41,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 455 transitions, 6704 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:41,609 INFO L231 Difference]: Finished difference. Result has 343 places, 436 transitions, 5925 flow [2024-06-14 14:10:41,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5720, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5925, PETRI_PLACES=343, PETRI_TRANSITIONS=436} [2024-06-14 14:10:41,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-14 14:10:41,609 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 436 transitions, 5925 flow [2024-06-14 14:10:41,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:41,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:41,610 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 14:10:41,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 14:10:41,610 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 14:10:41,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1696350594, now seen corresponding path program 10 times [2024-06-14 14:10:41,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:41,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734140279] [2024-06-14 14:10:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:41,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:41,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:41,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734140279] [2024-06-14 14:10:41,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734140279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:41,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:41,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:41,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460816063] [2024-06-14 14:10:41,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:41,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:41,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:41,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:41,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:41,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:10:41,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 436 transitions, 5925 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:41,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:41,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:10:41,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:43,191 INFO L124 PetriNetUnfolderBase]: 4694/8049 cut-off events. [2024-06-14 14:10:43,192 INFO L125 PetriNetUnfolderBase]: For 1276134/1276134 co-relation queries the response was YES. [2024-06-14 14:10:43,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59229 conditions, 8049 events. 4694/8049 cut-off events. For 1276134/1276134 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 58460 event pairs, 1332 based on Foata normal form. 16/8052 useless extension candidates. Maximal degree in co-relation 59066. Up to 7102 conditions per place. [2024-06-14 14:10:43,306 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 346 selfloop transitions, 96 changer transitions 1/451 dead transitions. [2024-06-14 14:10:43,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 451 transitions, 6859 flow [2024-06-14 14:10:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:10:43,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 14:10:43,308 INFO L175 Difference]: Start difference. First operand has 343 places, 436 transitions, 5925 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:10:43,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 451 transitions, 6859 flow [2024-06-14 14:10:48,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 451 transitions, 6674 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:48,294 INFO L231 Difference]: Finished difference. Result has 345 places, 435 transitions, 5921 flow [2024-06-14 14:10:48,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5740, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5921, PETRI_PLACES=345, PETRI_TRANSITIONS=435} [2024-06-14 14:10:48,294 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-14 14:10:48,295 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 435 transitions, 5921 flow [2024-06-14 14:10:48,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:48,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:48,295 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 14:10:48,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 14:10:48,295 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 14:10:48,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:48,295 INFO L85 PathProgramCache]: Analyzing trace with hash 12711558, now seen corresponding path program 2 times [2024-06-14 14:10:48,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:48,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129203213] [2024-06-14 14:10:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:48,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:48,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:48,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129203213] [2024-06-14 14:10:48,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129203213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:48,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:48,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:48,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305243292] [2024-06-14 14:10:48,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:48,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:48,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:48,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:10:48,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 435 transitions, 5921 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:48,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:48,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:10:48,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:50,011 INFO L124 PetriNetUnfolderBase]: 4622/7962 cut-off events. [2024-06-14 14:10:50,012 INFO L125 PetriNetUnfolderBase]: For 1271051/1271051 co-relation queries the response was YES. [2024-06-14 14:10:50,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59268 conditions, 7962 events. 4622/7962 cut-off events. For 1271051/1271051 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 57819 event pairs, 1259 based on Foata normal form. 12/7970 useless extension candidates. Maximal degree in co-relation 59104. Up to 6898 conditions per place. [2024-06-14 14:10:50,115 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 356 selfloop transitions, 94 changer transitions 0/458 dead transitions. [2024-06-14 14:10:50,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 458 transitions, 6967 flow [2024-06-14 14:10:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:50,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:10:50,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-06-14 14:10:50,116 INFO L175 Difference]: Start difference. First operand has 345 places, 435 transitions, 5921 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:10:50,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 458 transitions, 6967 flow [2024-06-14 14:10:55,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 458 transitions, 6694 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:55,644 INFO L231 Difference]: Finished difference. Result has 345 places, 437 transitions, 5923 flow [2024-06-14 14:10:55,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5648, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5923, PETRI_PLACES=345, PETRI_TRANSITIONS=437} [2024-06-14 14:10:55,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-14 14:10:55,645 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 437 transitions, 5923 flow [2024-06-14 14:10:55,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:55,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:55,645 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 14:10:55,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 14:10:55,645 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 14:10:55,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:55,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1703975106, now seen corresponding path program 3 times [2024-06-14 14:10:55,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:55,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561433976] [2024-06-14 14:10:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:55,810 INFO 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 14:10:55,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:55,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561433976] [2024-06-14 14:10:55,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561433976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:55,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:55,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:55,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324026371] [2024-06-14 14:10:55,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:55,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:55,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:55,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:10:55,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 437 transitions, 5923 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:55,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:55,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:10:55,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:57,243 INFO L124 PetriNetUnfolderBase]: 4662/8007 cut-off events. [2024-06-14 14:10:57,244 INFO L125 PetriNetUnfolderBase]: For 1295765/1295765 co-relation queries the response was YES. [2024-06-14 14:10:57,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59863 conditions, 8007 events. 4662/8007 cut-off events. For 1295765/1295765 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 58243 event pairs, 1290 based on Foata normal form. 12/8006 useless extension candidates. Maximal degree in co-relation 59698. Up to 6994 conditions per place. [2024-06-14 14:10:57,362 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 349 selfloop transitions, 100 changer transitions 0/457 dead transitions. [2024-06-14 14:10:57,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 457 transitions, 6963 flow [2024-06-14 14:10:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:10:57,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:10:57,363 INFO L175 Difference]: Start difference. First operand has 345 places, 437 transitions, 5923 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:10:57,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 457 transitions, 6963 flow [2024-06-14 14:11:02,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 457 transitions, 6708 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 14:11:02,543 INFO L231 Difference]: Finished difference. Result has 347 places, 439 transitions, 5959 flow [2024-06-14 14:11:02,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5959, PETRI_PLACES=347, PETRI_TRANSITIONS=439} [2024-06-14 14:11:02,543 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-14 14:11:02,543 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 439 transitions, 5959 flow [2024-06-14 14:11:02,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:02,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:02,544 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 14:11:02,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 14:11:02,544 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 14:11:02,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:02,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2029131582, now seen corresponding path program 4 times [2024-06-14 14:11:02,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:02,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279290780] [2024-06-14 14:11:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:02,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:02,705 INFO 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 14:11:02,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:02,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279290780] [2024-06-14 14:11:02,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279290780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:02,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:02,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:11:02,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162057162] [2024-06-14 14:11:02,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:02,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:11:02,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:02,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:11:02,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:11:02,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:11:02,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 439 transitions, 5959 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:02,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:02,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:11:02,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:04,149 INFO L124 PetriNetUnfolderBase]: 4669/8042 cut-off events. [2024-06-14 14:11:04,149 INFO L125 PetriNetUnfolderBase]: For 1272162/1272162 co-relation queries the response was YES. [2024-06-14 14:11:04,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59121 conditions, 8042 events. 4669/8042 cut-off events. For 1272162/1272162 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 58598 event pairs, 1257 based on Foata normal form. 12/8041 useless extension candidates. Maximal degree in co-relation 58955. Up to 6523 conditions per place. [2024-06-14 14:11:04,268 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 331 selfloop transitions, 120 changer transitions 0/459 dead transitions. [2024-06-14 14:11:04,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 459 transitions, 6965 flow [2024-06-14 14:11:04,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:11:04,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:11:04,269 INFO L175 Difference]: Start difference. First operand has 347 places, 439 transitions, 5959 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:11:04,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 459 transitions, 6965 flow [2024-06-14 14:11:09,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 459 transitions, 6694 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 14:11:09,244 INFO L231 Difference]: Finished difference. Result has 349 places, 440 transitions, 5977 flow [2024-06-14 14:11:09,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5688, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5977, PETRI_PLACES=349, PETRI_TRANSITIONS=440} [2024-06-14 14:11:09,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-14 14:11:09,244 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 440 transitions, 5977 flow [2024-06-14 14:11:09,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:09,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:09,245 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 14:11:09,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 14:11:09,245 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 14:11:09,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash -945848019, now seen corresponding path program 1 times [2024-06-14 14:11:09,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:09,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115043303] [2024-06-14 14:11:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:09,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:09,472 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 14:11:09,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115043303] [2024-06-14 14:11:09,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115043303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:09,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:09,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:09,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804206467] [2024-06-14 14:11:09,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:09,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:09,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:09,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:11:09,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 440 transitions, 5977 flow. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:09,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:09,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:11:09,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:10,926 INFO L124 PetriNetUnfolderBase]: 4674/8065 cut-off events. [2024-06-14 14:11:10,926 INFO L125 PetriNetUnfolderBase]: For 1207570/1207570 co-relation queries the response was YES. [2024-06-14 14:11:11,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59203 conditions, 8065 events. 4674/8065 cut-off events. For 1207570/1207570 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 58766 event pairs, 1234 based on Foata normal form. 1/8064 useless extension candidates. Maximal degree in co-relation 59036. Up to 7307 conditions per place. [2024-06-14 14:11:11,057 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 417 selfloop transitions, 43 changer transitions 0/468 dead transitions. [2024-06-14 14:11:11,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 468 transitions, 7248 flow [2024-06-14 14:11:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:11:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:11:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 14:11:11,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726744186046512 [2024-06-14 14:11:11,059 INFO L175 Difference]: Start difference. First operand has 349 places, 440 transitions, 5977 flow. Second operand 8 states and 197 transitions. [2024-06-14 14:11:11,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 468 transitions, 7248 flow [2024-06-14 14:11:16,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 468 transitions, 6850 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 14:11:16,124 INFO L231 Difference]: Finished difference. Result has 350 places, 443 transitions, 5722 flow [2024-06-14 14:11:16,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5579, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5722, PETRI_PLACES=350, PETRI_TRANSITIONS=443} [2024-06-14 14:11:16,124 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-14 14:11:16,124 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 443 transitions, 5722 flow [2024-06-14 14:11:16,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:16,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:16,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:16,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 14:11:16,125 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 14:11:16,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:16,125 INFO L85 PathProgramCache]: Analyzing trace with hash -756084329, now seen corresponding path program 2 times [2024-06-14 14:11:16,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:16,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554554362] [2024-06-14 14:11:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:16,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:16,314 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 14:11:16,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:16,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554554362] [2024-06-14 14:11:16,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554554362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:16,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:16,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:11:16,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395578830] [2024-06-14 14:11:16,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:16,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:11:16,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:16,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:11:16,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:11:16,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:11:16,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 443 transitions, 5722 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:16,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:16,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:11:16,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:17,800 INFO L124 PetriNetUnfolderBase]: 4671/8049 cut-off events. [2024-06-14 14:11:17,801 INFO L125 PetriNetUnfolderBase]: For 1212730/1212730 co-relation queries the response was YES. [2024-06-14 14:11:17,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57996 conditions, 8049 events. 4671/8049 cut-off events. For 1212730/1212730 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 58553 event pairs, 1232 based on Foata normal form. 1/8048 useless extension candidates. Maximal degree in co-relation 57830. Up to 7304 conditions per place. [2024-06-14 14:11:17,916 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 412 selfloop transitions, 43 changer transitions 0/463 dead transitions. [2024-06-14 14:11:17,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 463 transitions, 6682 flow [2024-06-14 14:11:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:11:17,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574750830564784 [2024-06-14 14:11:17,917 INFO L175 Difference]: Start difference. First operand has 350 places, 443 transitions, 5722 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:11:17,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 463 transitions, 6682 flow [2024-06-14 14:11:23,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 463 transitions, 6550 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:23,809 INFO L231 Difference]: Finished difference. Result has 348 places, 443 transitions, 5686 flow [2024-06-14 14:11:23,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5590, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5686, PETRI_PLACES=348, PETRI_TRANSITIONS=443} [2024-06-14 14:11:23,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-14 14:11:23,810 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 443 transitions, 5686 flow [2024-06-14 14:11:23,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:23,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:23,810 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, 1, 1] [2024-06-14 14:11:23,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 14:11:23,811 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 14:11:23,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1635306185, now seen corresponding path program 1 times [2024-06-14 14:11:23,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:23,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367017419] [2024-06-14 14:11:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:23,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:24,039 INFO 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 14:11:24,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:24,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367017419] [2024-06-14 14:11:24,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367017419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:24,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:24,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:24,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139596] [2024-06-14 14:11:24,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:24,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:24,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:24,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:24,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:24,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:11:24,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 443 transitions, 5686 flow. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:24,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:24,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:11:24,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:25,582 INFO L124 PetriNetUnfolderBase]: 4692/8062 cut-off events. [2024-06-14 14:11:25,583 INFO L125 PetriNetUnfolderBase]: For 1243388/1243388 co-relation queries the response was YES. [2024-06-14 14:11:25,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58609 conditions, 8062 events. 4692/8062 cut-off events. For 1243388/1243388 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 58615 event pairs, 1216 based on Foata normal form. 2/8043 useless extension candidates. Maximal degree in co-relation 58444. Up to 7096 conditions per place. [2024-06-14 14:11:25,703 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 356 selfloop transitions, 126 changer transitions 2/492 dead transitions. [2024-06-14 14:11:25,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 492 transitions, 7216 flow [2024-06-14 14:11:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:25,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 295 transitions. [2024-06-14 14:11:25,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5717054263565892 [2024-06-14 14:11:25,704 INFO L175 Difference]: Start difference. First operand has 348 places, 443 transitions, 5686 flow. Second operand 12 states and 295 transitions. [2024-06-14 14:11:25,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 492 transitions, 7216 flow [2024-06-14 14:11:31,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 492 transitions, 7116 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:11:31,309 INFO L231 Difference]: Finished difference. Result has 355 places, 447 transitions, 6056 flow [2024-06-14 14:11:31,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6056, PETRI_PLACES=355, PETRI_TRANSITIONS=447} [2024-06-14 14:11:31,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-14 14:11:31,309 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 447 transitions, 6056 flow [2024-06-14 14:11:31,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:31,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:31,310 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 14:11:31,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 14:11:31,310 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 14:11:31,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1360365163, now seen corresponding path program 2 times [2024-06-14 14:11:31,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:31,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242330680] [2024-06-14 14:11:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:31,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:31,548 INFO 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 14:11:31,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:31,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242330680] [2024-06-14 14:11:31,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242330680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:31,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:31,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:31,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91933489] [2024-06-14 14:11:31,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:31,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:31,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:31,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:31,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:31,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:11:31,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 447 transitions, 6056 flow. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:31,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:31,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:11:31,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:33,074 INFO L124 PetriNetUnfolderBase]: 4687/8065 cut-off events. [2024-06-14 14:11:33,075 INFO L125 PetriNetUnfolderBase]: For 1246654/1246654 co-relation queries the response was YES. [2024-06-14 14:11:33,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58872 conditions, 8065 events. 4687/8065 cut-off events. For 1246654/1246654 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 58656 event pairs, 1241 based on Foata normal form. 2/8058 useless extension candidates. Maximal degree in co-relation 58705. Up to 7146 conditions per place. [2024-06-14 14:11:33,194 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 355 selfloop transitions, 121 changer transitions 0/484 dead transitions. [2024-06-14 14:11:33,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 484 transitions, 7100 flow [2024-06-14 14:11:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 269 transitions. [2024-06-14 14:11:33,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687103594080338 [2024-06-14 14:11:33,198 INFO L175 Difference]: Start difference. First operand has 355 places, 447 transitions, 6056 flow. Second operand 11 states and 269 transitions. [2024-06-14 14:11:33,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 484 transitions, 7100 flow [2024-06-14 14:11:39,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 484 transitions, 6809 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-14 14:11:39,191 INFO L231 Difference]: Finished difference. Result has 360 places, 447 transitions, 6012 flow [2024-06-14 14:11:39,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5765, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6012, PETRI_PLACES=360, PETRI_TRANSITIONS=447} [2024-06-14 14:11:39,192 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-14 14:11:39,192 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 447 transitions, 6012 flow [2024-06-14 14:11:39,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:39,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:39,193 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 14:11:39,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 14:11:39,195 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 14:11:39,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:39,195 INFO L85 PathProgramCache]: Analyzing trace with hash 564319787, now seen corresponding path program 3 times [2024-06-14 14:11:39,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:39,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764731479] [2024-06-14 14:11:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:39,439 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 14:11:39,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:39,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764731479] [2024-06-14 14:11:39,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764731479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:39,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:39,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:39,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710191812] [2024-06-14 14:11:39,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:39,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:39,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:39,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:39,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:39,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:11:39,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 447 transitions, 6012 flow. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:39,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:39,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:11:39,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:40,977 INFO L124 PetriNetUnfolderBase]: 4695/8083 cut-off events. [2024-06-14 14:11:40,978 INFO L125 PetriNetUnfolderBase]: For 1270017/1270017 co-relation queries the response was YES. [2024-06-14 14:11:41,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59239 conditions, 8083 events. 4695/8083 cut-off events. For 1270017/1270017 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 58843 event pairs, 1245 based on Foata normal form. 2/8078 useless extension candidates. Maximal degree in co-relation 59070. Up to 7158 conditions per place. [2024-06-14 14:11:41,102 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 348 selfloop transitions, 121 changer transitions 0/477 dead transitions. [2024-06-14 14:11:41,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 477 transitions, 7120 flow [2024-06-14 14:11:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-14 14:11:41,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:11:41,104 INFO L175 Difference]: Start difference. First operand has 360 places, 447 transitions, 6012 flow. Second operand 11 states and 258 transitions. [2024-06-14 14:11:41,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 477 transitions, 7120 flow [2024-06-14 14:11:45,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 477 transitions, 6841 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-14 14:11:45,865 INFO L231 Difference]: Finished difference. Result has 360 places, 449 transitions, 6086 flow [2024-06-14 14:11:45,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5733, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6086, PETRI_PLACES=360, PETRI_TRANSITIONS=449} [2024-06-14 14:11:45,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-14 14:11:45,866 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 449 transitions, 6086 flow [2024-06-14 14:11:45,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:45,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:45,866 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 14:11:45,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 14:11:45,866 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 14:11:45,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:45,867 INFO L85 PathProgramCache]: Analyzing trace with hash 561462827, now seen corresponding path program 4 times [2024-06-14 14:11:45,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:45,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834127211] [2024-06-14 14:11:45,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:45,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:46,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:46,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834127211] [2024-06-14 14:11:46,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834127211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:46,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:46,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:46,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513905276] [2024-06-14 14:11:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:46,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:46,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:46,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:11:46,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 449 transitions, 6086 flow. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:46,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:46,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:11:46,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:47,618 INFO L124 PetriNetUnfolderBase]: 4703/8091 cut-off events. [2024-06-14 14:11:47,618 INFO L125 PetriNetUnfolderBase]: For 1293292/1293292 co-relation queries the response was YES. [2024-06-14 14:11:47,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59626 conditions, 8091 events. 4703/8091 cut-off events. For 1293292/1293292 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 58896 event pairs, 1241 based on Foata normal form. 2/8082 useless extension candidates. Maximal degree in co-relation 59456. Up to 7150 conditions per place. [2024-06-14 14:11:47,741 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 347 selfloop transitions, 126 changer transitions 0/481 dead transitions. [2024-06-14 14:11:47,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 481 transitions, 7210 flow [2024-06-14 14:11:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 278 transitions. [2024-06-14 14:11:47,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387596899224806 [2024-06-14 14:11:47,742 INFO L175 Difference]: Start difference. First operand has 360 places, 449 transitions, 6086 flow. Second operand 12 states and 278 transitions. [2024-06-14 14:11:47,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 481 transitions, 7210 flow [2024-06-14 14:11:52,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 481 transitions, 6901 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:52,903 INFO L231 Difference]: Finished difference. Result has 364 places, 451 transitions, 6144 flow [2024-06-14 14:11:52,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5777, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6144, PETRI_PLACES=364, PETRI_TRANSITIONS=451} [2024-06-14 14:11:52,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-14 14:11:52,908 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 451 transitions, 6144 flow [2024-06-14 14:11:52,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:52,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:52,909 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 14:11:52,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 14:11:52,909 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 14:11:52,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:52,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1018745227, now seen corresponding path program 3 times [2024-06-14 14:11:52,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:52,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838717127] [2024-06-14 14:11:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:52,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:53,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:53,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838717127] [2024-06-14 14:11:53,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838717127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:53,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:53,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:53,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269520748] [2024-06-14 14:11:53,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:53,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:53,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:53,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:53,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:11:53,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 451 transitions, 6144 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:53,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:53,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:11:53,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:54,689 INFO L124 PetriNetUnfolderBase]: 4708/8098 cut-off events. [2024-06-14 14:11:54,689 INFO L125 PetriNetUnfolderBase]: For 1305223/1305223 co-relation queries the response was YES. [2024-06-14 14:11:54,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59777 conditions, 8098 events. 4708/8098 cut-off events. For 1305223/1305223 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 58944 event pairs, 1230 based on Foata normal form. 1/8087 useless extension candidates. Maximal degree in co-relation 59606. Up to 6821 conditions per place. [2024-06-14 14:11:54,797 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 290 selfloop transitions, 198 changer transitions 0/496 dead transitions. [2024-06-14 14:11:54,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 496 transitions, 8020 flow [2024-06-14 14:11:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 283 transitions. [2024-06-14 14:11:54,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5983086680761099 [2024-06-14 14:11:54,799 INFO L175 Difference]: Start difference. First operand has 364 places, 451 transitions, 6144 flow. Second operand 11 states and 283 transitions. [2024-06-14 14:11:54,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 496 transitions, 8020 flow [2024-06-14 14:11:59,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 496 transitions, 7669 flow, removed 51 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:59,811 INFO L231 Difference]: Finished difference. Result has 365 places, 454 transitions, 6235 flow [2024-06-14 14:11:59,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6235, PETRI_PLACES=365, PETRI_TRANSITIONS=454} [2024-06-14 14:11:59,812 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-14 14:11:59,812 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 454 transitions, 6235 flow [2024-06-14 14:11:59,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:59,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:59,812 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 14:11:59,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 14:11:59,813 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 14:11:59,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:59,821 INFO L85 PathProgramCache]: Analyzing trace with hash 758089005, now seen corresponding path program 4 times [2024-06-14 14:11:59,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:59,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489772620] [2024-06-14 14:11:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:59,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:00,018 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 14:12:00,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:00,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489772620] [2024-06-14 14:12:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489772620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:00,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:00,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:12:00,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208576648] [2024-06-14 14:12:00,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:00,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:12:00,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:00,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:12:00,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:12:00,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:12:00,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 454 transitions, 6235 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:00,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:00,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:12:00,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:01,580 INFO L124 PetriNetUnfolderBase]: 4721/8122 cut-off events. [2024-06-14 14:12:01,580 INFO L125 PetriNetUnfolderBase]: For 1331026/1331026 co-relation queries the response was YES. [2024-06-14 14:12:01,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60294 conditions, 8122 events. 4721/8122 cut-off events. For 1331026/1331026 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 59233 event pairs, 1232 based on Foata normal form. 1/8111 useless extension candidates. Maximal degree in co-relation 60122. Up to 6831 conditions per place. [2024-06-14 14:12:01,996 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 204 changer transitions 0/500 dead transitions. [2024-06-14 14:12:01,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 500 transitions, 8425 flow [2024-06-14 14:12:01,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:12:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:12:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 281 transitions. [2024-06-14 14:12:01,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5940803382663847 [2024-06-14 14:12:01,998 INFO L175 Difference]: Start difference. First operand has 365 places, 454 transitions, 6235 flow. Second operand 11 states and 281 transitions. [2024-06-14 14:12:01,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 500 transitions, 8425 flow [2024-06-14 14:12:07,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 500 transitions, 7997 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 14:12:07,209 INFO L231 Difference]: Finished difference. Result has 367 places, 460 transitions, 6313 flow [2024-06-14 14:12:07,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6313, PETRI_PLACES=367, PETRI_TRANSITIONS=460} [2024-06-14 14:12:07,209 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-14 14:12:07,210 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 460 transitions, 6313 flow [2024-06-14 14:12:07,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:07,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:07,210 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 14:12:07,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 14:12:07,210 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 14:12:07,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:07,211 INFO L85 PathProgramCache]: Analyzing trace with hash -501969181, now seen corresponding path program 5 times [2024-06-14 14:12:07,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:07,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850820890] [2024-06-14 14:12:07,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:07,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:07,401 INFO 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 14:12:07,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:07,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850820890] [2024-06-14 14:12:07,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850820890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:07,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:07,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:12:07,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004534481] [2024-06-14 14:12:07,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:07,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:12:07,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:07,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:12:07,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:12:07,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:12:07,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 460 transitions, 6313 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:07,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:07,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:12:07,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:08,979 INFO L124 PetriNetUnfolderBase]: 4718/8118 cut-off events. [2024-06-14 14:12:08,980 INFO L125 PetriNetUnfolderBase]: For 1342916/1342916 co-relation queries the response was YES. [2024-06-14 14:12:09,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60273 conditions, 8118 events. 4718/8118 cut-off events. For 1342916/1342916 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 59131 event pairs, 1232 based on Foata normal form. 1/8107 useless extension candidates. Maximal degree in co-relation 60100. Up to 6829 conditions per place. [2024-06-14 14:12:09,093 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 289 selfloop transitions, 209 changer transitions 0/506 dead transitions. [2024-06-14 14:12:09,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 506 transitions, 8191 flow [2024-06-14 14:12:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:12:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:12:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 304 transitions. [2024-06-14 14:12:09,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 14:12:09,094 INFO L175 Difference]: Start difference. First operand has 367 places, 460 transitions, 6313 flow. Second operand 12 states and 304 transitions. [2024-06-14 14:12:09,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 506 transitions, 8191 flow [2024-06-14 14:12:14,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 506 transitions, 7815 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 14:12:14,838 INFO L231 Difference]: Finished difference. Result has 372 places, 460 transitions, 6361 flow [2024-06-14 14:12:14,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5937, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6361, PETRI_PLACES=372, PETRI_TRANSITIONS=460} [2024-06-14 14:12:14,838 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-14 14:12:14,838 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 460 transitions, 6361 flow [2024-06-14 14:12:14,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:14,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:14,839 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 14:12:14,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 14:12:14,839 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 14:12:14,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:14,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1153504885, now seen corresponding path program 6 times [2024-06-14 14:12:14,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:14,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545694893] [2024-06-14 14:12:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:14,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:15,028 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 14:12:15,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:15,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545694893] [2024-06-14 14:12:15,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545694893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:15,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:15,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:12:15,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858896789] [2024-06-14 14:12:15,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:15,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:12:15,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:15,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:12:15,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:12:15,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:12:15,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 460 transitions, 6361 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:15,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:15,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:12:15,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:16,765 INFO L124 PetriNetUnfolderBase]: 4723/8123 cut-off events. [2024-06-14 14:12:16,765 INFO L125 PetriNetUnfolderBase]: For 1363789/1363789 co-relation queries the response was YES. [2024-06-14 14:12:16,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60568 conditions, 8123 events. 4723/8123 cut-off events. For 1363789/1363789 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 59138 event pairs, 1230 based on Foata normal form. 1/8112 useless extension candidates. Maximal degree in co-relation 60394. Up to 6833 conditions per place. [2024-06-14 14:12:16,875 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 212 changer transitions 0/507 dead transitions. [2024-06-14 14:12:16,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 507 transitions, 8290 flow [2024-06-14 14:12:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:12:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:12:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 319 transitions. [2024-06-14 14:12:16,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706618962432916 [2024-06-14 14:12:16,876 INFO L175 Difference]: Start difference. First operand has 372 places, 460 transitions, 6361 flow. Second operand 13 states and 319 transitions. [2024-06-14 14:12:16,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 507 transitions, 8290 flow [2024-06-14 14:12:22,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 507 transitions, 7789 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 14:12:22,956 INFO L231 Difference]: Finished difference. Result has 373 places, 463 transitions, 6339 flow [2024-06-14 14:12:22,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6339, PETRI_PLACES=373, PETRI_TRANSITIONS=463} [2024-06-14 14:12:22,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 14:12:22,956 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 463 transitions, 6339 flow [2024-06-14 14:12:22,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:22,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:22,957 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 14:12:22,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 14:12:22,957 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 14:12:22,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1031859445, now seen corresponding path program 7 times [2024-06-14 14:12:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:22,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203529727] [2024-06-14 14:12:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:22,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:23,129 INFO 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 14:12:23,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:23,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203529727] [2024-06-14 14:12:23,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203529727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:23,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:23,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:23,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415352096] [2024-06-14 14:12:23,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:23,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:23,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:23,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:23,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:23,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:12:23,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 463 transitions, 6339 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:23,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:23,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:12:23,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:24,614 INFO L124 PetriNetUnfolderBase]: 4744/8160 cut-off events. [2024-06-14 14:12:24,614 INFO L125 PetriNetUnfolderBase]: For 1400252/1400252 co-relation queries the response was YES. [2024-06-14 14:12:24,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61148 conditions, 8160 events. 4744/8160 cut-off events. For 1400252/1400252 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 59500 event pairs, 1232 based on Foata normal form. 1/8149 useless extension candidates. Maximal degree in co-relation 60973. Up to 6849 conditions per place. [2024-06-14 14:12:24,738 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 273 selfloop transitions, 221 changer transitions 0/502 dead transitions. [2024-06-14 14:12:24,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 502 transitions, 8577 flow [2024-06-14 14:12:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:12:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:12:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-14 14:12:24,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 14:12:24,740 INFO L175 Difference]: Start difference. First operand has 373 places, 463 transitions, 6339 flow. Second operand 10 states and 250 transitions. [2024-06-14 14:12:24,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 502 transitions, 8577 flow [2024-06-14 14:12:30,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 502 transitions, 8193 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 14:12:30,653 INFO L231 Difference]: Finished difference. Result has 374 places, 472 transitions, 6541 flow [2024-06-14 14:12:30,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5964, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6541, PETRI_PLACES=374, PETRI_TRANSITIONS=472} [2024-06-14 14:12:30,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-14 14:12:30,654 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 472 transitions, 6541 flow [2024-06-14 14:12:30,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:30,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:30,654 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 14:12:30,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 14:12:30,654 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 14:12:30,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:30,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1038525685, now seen corresponding path program 8 times [2024-06-14 14:12:30,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:30,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753497559] [2024-06-14 14:12:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:30,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:30,831 INFO 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 14:12:30,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:30,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753497559] [2024-06-14 14:12:30,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753497559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:30,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:30,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:30,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803805593] [2024-06-14 14:12:30,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:30,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:30,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:30,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:30,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:30,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:12:30,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 472 transitions, 6541 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:30,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:30,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:12:30,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:32,404 INFO L124 PetriNetUnfolderBase]: 4757/8178 cut-off events. [2024-06-14 14:12:32,405 INFO L125 PetriNetUnfolderBase]: For 1430553/1430553 co-relation queries the response was YES. [2024-06-14 14:12:32,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61618 conditions, 8178 events. 4757/8178 cut-off events. For 1430553/1430553 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59596 event pairs, 1230 based on Foata normal form. 1/8167 useless extension candidates. Maximal degree in co-relation 61442. Up to 6859 conditions per place. [2024-06-14 14:12:32,518 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 269 selfloop transitions, 232 changer transitions 0/509 dead transitions. [2024-06-14 14:12:32,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 509 transitions, 8763 flow [2024-06-14 14:12:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:12:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:12:32,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-14 14:12:32,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644820295983086 [2024-06-14 14:12:32,519 INFO L175 Difference]: Start difference. First operand has 374 places, 472 transitions, 6541 flow. Second operand 11 states and 267 transitions. [2024-06-14 14:12:32,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 509 transitions, 8763 flow [2024-06-14 14:12:38,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 509 transitions, 8392 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 14:12:38,756 INFO L231 Difference]: Finished difference. Result has 380 places, 478 transitions, 6739 flow [2024-06-14 14:12:38,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6188, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6739, PETRI_PLACES=380, PETRI_TRANSITIONS=478} [2024-06-14 14:12:38,769 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-14 14:12:38,769 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 478 transitions, 6739 flow [2024-06-14 14:12:38,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:38,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:38,770 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 14:12:38,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 14:12:38,771 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 14:12:38,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1819542283, now seen corresponding path program 9 times [2024-06-14 14:12:38,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:38,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622642818] [2024-06-14 14:12:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:38,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:38,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:38,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622642818] [2024-06-14 14:12:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622642818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:38,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:38,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:12:38,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732162600] [2024-06-14 14:12:38,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:38,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:12:38,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:38,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:12:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:12:39,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:12:39,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 478 transitions, 6739 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:39,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:39,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:12:39,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:40,681 INFO L124 PetriNetUnfolderBase]: 4762/8187 cut-off events. [2024-06-14 14:12:40,681 INFO L125 PetriNetUnfolderBase]: For 1452370/1452370 co-relation queries the response was YES. [2024-06-14 14:12:40,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61912 conditions, 8187 events. 4762/8187 cut-off events. For 1452370/1452370 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 59686 event pairs, 1259 based on Foata normal form. 1/8176 useless extension candidates. Maximal degree in co-relation 61735. Up to 6863 conditions per place. [2024-06-14 14:12:40,795 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 274 selfloop transitions, 230 changer transitions 0/512 dead transitions. [2024-06-14 14:12:40,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 512 transitions, 8923 flow [2024-06-14 14:12:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:12:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:12:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 269 transitions. [2024-06-14 14:12:40,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687103594080338 [2024-06-14 14:12:40,796 INFO L175 Difference]: Start difference. First operand has 380 places, 478 transitions, 6739 flow. Second operand 11 states and 269 transitions. [2024-06-14 14:12:40,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 512 transitions, 8923 flow [2024-06-14 14:12:47,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 512 transitions, 8505 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 14:12:47,873 INFO L231 Difference]: Finished difference. Result has 384 places, 481 transitions, 6833 flow [2024-06-14 14:12:47,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6327, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6833, PETRI_PLACES=384, PETRI_TRANSITIONS=481} [2024-06-14 14:12:47,881 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 14:12:47,881 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 481 transitions, 6833 flow [2024-06-14 14:12:47,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:47,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:47,881 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 14:12:47,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 14:12:47,881 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 14:12:47,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:47,882 INFO L85 PathProgramCache]: Analyzing trace with hash 754747349, now seen corresponding path program 1 times [2024-06-14 14:12:47,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:47,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926171363] [2024-06-14 14:12:47,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:47,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:48,065 INFO 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 14:12:48,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:48,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926171363] [2024-06-14 14:12:48,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926171363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:48,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:48,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:48,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022901253] [2024-06-14 14:12:48,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:48,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:48,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:48,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:48,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:48,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:12:48,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 481 transitions, 6833 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:48,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:48,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:12:48,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:49,643 INFO L124 PetriNetUnfolderBase]: 4757/8160 cut-off events. [2024-06-14 14:12:49,643 INFO L125 PetriNetUnfolderBase]: For 1464694/1464694 co-relation queries the response was YES. [2024-06-14 14:12:49,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61747 conditions, 8160 events. 4757/8160 cut-off events. For 1464694/1464694 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59408 event pairs, 1238 based on Foata normal form. 2/8143 useless extension candidates. Maximal degree in co-relation 61569. Up to 7188 conditions per place. [2024-06-14 14:12:49,974 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 393 selfloop transitions, 111 changer transitions 2/514 dead transitions. [2024-06-14 14:12:49,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 514 transitions, 8199 flow [2024-06-14 14:12:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:12:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:12:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 14:12:49,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 14:12:49,975 INFO L175 Difference]: Start difference. First operand has 384 places, 481 transitions, 6833 flow. Second operand 9 states and 225 transitions. [2024-06-14 14:12:49,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 514 transitions, 8199 flow [2024-06-14 14:12:56,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 514 transitions, 7725 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 14:12:56,747 INFO L231 Difference]: Finished difference. Result has 384 places, 481 transitions, 6586 flow [2024-06-14 14:12:56,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6359, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6586, PETRI_PLACES=384, PETRI_TRANSITIONS=481} [2024-06-14 14:12:56,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 14:12:56,748 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 481 transitions, 6586 flow [2024-06-14 14:12:56,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:56,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:56,748 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 14:12:56,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 14:12:56,748 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 14:12:56,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:56,749 INFO L85 PathProgramCache]: Analyzing trace with hash 757604309, now seen corresponding path program 2 times [2024-06-14 14:12:56,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:56,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856937001] [2024-06-14 14:12:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:56,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:56,941 INFO 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 14:12:56,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:56,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856937001] [2024-06-14 14:12:56,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856937001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:56,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:56,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:56,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441901356] [2024-06-14 14:12:56,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:56,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:56,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:56,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:56,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:56,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:12:56,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 481 transitions, 6586 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:56,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:56,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:12:56,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:58,541 INFO L124 PetriNetUnfolderBase]: 4752/8175 cut-off events. [2024-06-14 14:12:58,541 INFO L125 PetriNetUnfolderBase]: For 1466722/1466722 co-relation queries the response was YES. [2024-06-14 14:12:58,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61239 conditions, 8175 events. 4752/8175 cut-off events. For 1466722/1466722 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 59671 event pairs, 1261 based on Foata normal form. 2/8163 useless extension candidates. Maximal degree in co-relation 61060. Up to 7244 conditions per place. [2024-06-14 14:12:58,668 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 394 selfloop transitions, 104 changer transitions 0/506 dead transitions. [2024-06-14 14:12:58,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 506 transitions, 7644 flow [2024-06-14 14:12:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:12:58,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784883720930233 [2024-06-14 14:12:58,669 INFO L175 Difference]: Start difference. First operand has 384 places, 481 transitions, 6586 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:12:58,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 506 transitions, 7644 flow [2024-06-14 14:13:05,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 506 transitions, 7385 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 14:13:05,323 INFO L231 Difference]: Finished difference. Result has 386 places, 481 transitions, 6540 flow [2024-06-14 14:13:05,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6327, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6540, PETRI_PLACES=386, PETRI_TRANSITIONS=481} [2024-06-14 14:13:05,324 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-14 14:13:05,324 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 481 transitions, 6540 flow [2024-06-14 14:13:05,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:05,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:05,324 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 14:13:05,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 14:13:05,324 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 14:13:05,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:05,325 INFO L85 PathProgramCache]: Analyzing trace with hash 872895479, now seen corresponding path program 3 times [2024-06-14 14:13:05,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:05,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874350541] [2024-06-14 14:13:05,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:05,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:05,493 INFO 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 14:13:05,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:05,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874350541] [2024-06-14 14:13:05,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874350541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:05,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:05,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:13:05,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065120888] [2024-06-14 14:13:05,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:05,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:13:05,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:13:05,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:13:05,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:13:05,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 481 transitions, 6540 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:05,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:05,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:13:05,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:07,215 INFO L124 PetriNetUnfolderBase]: 4755/8188 cut-off events. [2024-06-14 14:13:07,216 INFO L125 PetriNetUnfolderBase]: For 1488170/1488170 co-relation queries the response was YES. [2024-06-14 14:13:07,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61130 conditions, 8188 events. 4755/8188 cut-off events. For 1488170/1488170 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59839 event pairs, 1268 based on Foata normal form. 4/8178 useless extension candidates. Maximal degree in co-relation 60950. Up to 7243 conditions per place. [2024-06-14 14:13:07,346 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 385 selfloop transitions, 108 changer transitions 0/501 dead transitions. [2024-06-14 14:13:07,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 501 transitions, 7653 flow [2024-06-14 14:13:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:13:07,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574750830564784 [2024-06-14 14:13:07,347 INFO L175 Difference]: Start difference. First operand has 386 places, 481 transitions, 6540 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:13:07,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 501 transitions, 7653 flow [2024-06-14 14:13:13,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 501 transitions, 7426 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:13:13,944 INFO L231 Difference]: Finished difference. Result has 386 places, 483 transitions, 6624 flow [2024-06-14 14:13:13,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6313, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6624, PETRI_PLACES=386, PETRI_TRANSITIONS=483} [2024-06-14 14:13:13,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-14 14:13:13,945 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 483 transitions, 6624 flow [2024-06-14 14:13:13,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:13,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:13,945 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 14:13:13,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 14:13:13,946 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 14:13:13,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:13,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1381324821, now seen corresponding path program 5 times [2024-06-14 14:13:13,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:13,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295059243] [2024-06-14 14:13:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:13,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:14,196 INFO 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 14:13:14,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:14,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295059243] [2024-06-14 14:13:14,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295059243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:14,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:14,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:13:14,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539701252] [2024-06-14 14:13:14,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:14,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:13:14,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:14,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:13:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:13:14,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:13:14,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 483 transitions, 6624 flow. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:14,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:14,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:13:14,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:15,990 INFO L124 PetriNetUnfolderBase]: 4763/8192 cut-off events. [2024-06-14 14:13:15,991 INFO L125 PetriNetUnfolderBase]: For 1494480/1494480 co-relation queries the response was YES. [2024-06-14 14:13:16,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61529 conditions, 8192 events. 4763/8192 cut-off events. For 1494480/1494480 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 59830 event pairs, 1230 based on Foata normal form. 2/8181 useless extension candidates. Maximal degree in co-relation 61348. Up to 7307 conditions per place. [2024-06-14 14:13:16,102 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 444 selfloop transitions, 67 changer transitions 2/521 dead transitions. [2024-06-14 14:13:16,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 521 transitions, 8232 flow [2024-06-14 14:13:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-14 14:13:16,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674418604651162 [2024-06-14 14:13:16,103 INFO L175 Difference]: Start difference. First operand has 386 places, 483 transitions, 6624 flow. Second operand 10 states and 244 transitions. [2024-06-14 14:13:16,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 521 transitions, 8232 flow [2024-06-14 14:13:23,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 521 transitions, 7922 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 14:13:23,392 INFO L231 Difference]: Finished difference. Result has 392 places, 487 transitions, 6686 flow [2024-06-14 14:13:23,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6314, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6686, PETRI_PLACES=392, PETRI_TRANSITIONS=487} [2024-06-14 14:13:23,393 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-14 14:13:23,393 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 487 transitions, 6686 flow [2024-06-14 14:13:23,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:23,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:23,393 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 14:13:23,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 14:13:23,394 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 14:13:23,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash 633296183, now seen corresponding path program 6 times [2024-06-14 14:13:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:23,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119527897] [2024-06-14 14:13:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:23,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:23,632 INFO 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 14:13:23,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:23,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119527897] [2024-06-14 14:13:23,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119527897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:23,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:23,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:13:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151951815] [2024-06-14 14:13:23,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:23,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:13:23,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:23,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:13:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:13:23,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:13:23,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 487 transitions, 6686 flow. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:23,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:23,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:13:23,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:25,254 INFO L124 PetriNetUnfolderBase]: 4758/8190 cut-off events. [2024-06-14 14:13:25,255 INFO L125 PetriNetUnfolderBase]: For 1496342/1496342 co-relation queries the response was YES. [2024-06-14 14:13:25,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61144 conditions, 8190 events. 4758/8190 cut-off events. For 1496342/1496342 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 59845 event pairs, 1246 based on Foata normal form. 2/8188 useless extension candidates. Maximal degree in co-relation 60961. Up to 7248 conditions per place. [2024-06-14 14:13:25,380 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 398 selfloop transitions, 114 changer transitions 0/520 dead transitions. [2024-06-14 14:13:25,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 520 transitions, 7792 flow [2024-06-14 14:13:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-14 14:13:25,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5720930232558139 [2024-06-14 14:13:25,381 INFO L175 Difference]: Start difference. First operand has 392 places, 487 transitions, 6686 flow. Second operand 10 states and 246 transitions. [2024-06-14 14:13:25,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 520 transitions, 7792 flow [2024-06-14 14:13:33,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 520 transitions, 7525 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-14 14:13:33,289 INFO L231 Difference]: Finished difference. Result has 397 places, 487 transitions, 6652 flow [2024-06-14 14:13:33,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6419, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6652, PETRI_PLACES=397, PETRI_TRANSITIONS=487} [2024-06-14 14:13:33,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-14 14:13:33,290 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 487 transitions, 6652 flow [2024-06-14 14:13:33,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:33,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:33,290 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 14:13:33,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 14:13:33,291 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 14:13:33,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1781775989, now seen corresponding path program 10 times [2024-06-14 14:13:33,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:33,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997367378] [2024-06-14 14:13:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:33,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:33,484 INFO 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 14:13:33,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:33,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997367378] [2024-06-14 14:13:33,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997367378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:33,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:33,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:33,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949231345] [2024-06-14 14:13:33,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:33,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:33,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:33,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:33,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:33,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:13:33,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 487 transitions, 6652 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:33,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:33,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:13:33,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:35,227 INFO L124 PetriNetUnfolderBase]: 4763/8197 cut-off events. [2024-06-14 14:13:35,227 INFO L125 PetriNetUnfolderBase]: For 1503457/1503457 co-relation queries the response was YES. [2024-06-14 14:13:35,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61304 conditions, 8197 events. 4763/8197 cut-off events. For 1503457/1503457 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59844 event pairs, 1260 based on Foata normal form. 1/8194 useless extension candidates. Maximal degree in co-relation 61119. Up to 6863 conditions per place. [2024-06-14 14:13:35,356 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 332 selfloop transitions, 195 changer transitions 0/535 dead transitions. [2024-06-14 14:13:35,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 535 transitions, 8417 flow [2024-06-14 14:13:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:13:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:13:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 304 transitions. [2024-06-14 14:13:35,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 14:13:35,357 INFO L175 Difference]: Start difference. First operand has 397 places, 487 transitions, 6652 flow. Second operand 12 states and 304 transitions. [2024-06-14 14:13:35,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 535 transitions, 8417 flow [2024-06-14 14:13:42,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 535 transitions, 8171 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 14:13:42,920 INFO L231 Difference]: Finished difference. Result has 401 places, 490 transitions, 6851 flow [2024-06-14 14:13:42,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6406, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6851, PETRI_PLACES=401, PETRI_TRANSITIONS=490} [2024-06-14 14:13:42,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-14 14:13:42,921 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 490 transitions, 6851 flow [2024-06-14 14:13:42,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:42,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:42,921 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 14:13:42,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 14:13:42,921 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 14:13:42,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:42,922 INFO L85 PathProgramCache]: Analyzing trace with hash 497244991, now seen corresponding path program 11 times [2024-06-14 14:13:42,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:42,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283303276] [2024-06-14 14:13:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:42,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:43,124 INFO 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 14:13:43,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:43,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283303276] [2024-06-14 14:13:43,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283303276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:43,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:43,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:43,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550789707] [2024-06-14 14:13:43,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:43,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:43,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:43,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:43,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:43,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:13:43,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 490 transitions, 6851 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:43,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:43,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:13:43,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:44,837 INFO L124 PetriNetUnfolderBase]: 4776/8217 cut-off events. [2024-06-14 14:13:44,837 INFO L125 PetriNetUnfolderBase]: For 1535137/1535137 co-relation queries the response was YES. [2024-06-14 14:13:44,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62002 conditions, 8217 events. 4776/8217 cut-off events. For 1535137/1535137 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 60053 event pairs, 1259 based on Foata normal form. 1/8214 useless extension candidates. Maximal degree in co-relation 61816. Up to 6873 conditions per place. [2024-06-14 14:13:44,959 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 330 selfloop transitions, 202 changer transitions 0/540 dead transitions. [2024-06-14 14:13:44,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 540 transitions, 8953 flow [2024-06-14 14:13:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:13:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:13:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 320 transitions. [2024-06-14 14:13:44,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5724508050089445 [2024-06-14 14:13:44,960 INFO L175 Difference]: Start difference. First operand has 401 places, 490 transitions, 6851 flow. Second operand 13 states and 320 transitions. [2024-06-14 14:13:44,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 540 transitions, 8953 flow [2024-06-14 14:13:53,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 540 transitions, 8620 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 14:13:53,167 INFO L231 Difference]: Finished difference. Result has 406 places, 496 transitions, 7036 flow [2024-06-14 14:13:53,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7036, PETRI_PLACES=406, PETRI_TRANSITIONS=496} [2024-06-14 14:13:53,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 14:13:53,167 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 496 transitions, 7036 flow [2024-06-14 14:13:53,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:53,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:53,168 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 14:13:53,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 14:13:53,168 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 14:13:53,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:53,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1692682559, now seen corresponding path program 12 times [2024-06-14 14:13:53,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:53,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957955283] [2024-06-14 14:13:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:53,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:53,352 INFO 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 14:13:53,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:53,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957955283] [2024-06-14 14:13:53,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957955283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:53,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:53,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:53,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595846176] [2024-06-14 14:13:53,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:53,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:53,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:53,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:53,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:13:53,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 496 transitions, 7036 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:53,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:53,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:13:53,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:55,328 INFO L124 PetriNetUnfolderBase]: 4773/8213 cut-off events. [2024-06-14 14:13:55,329 INFO L125 PetriNetUnfolderBase]: For 1547423/1547423 co-relation queries the response was YES. [2024-06-14 14:13:55,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62073 conditions, 8213 events. 4773/8213 cut-off events. For 1547423/1547423 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 59959 event pairs, 1260 based on Foata normal form. 1/8210 useless extension candidates. Maximal degree in co-relation 61885. Up to 6871 conditions per place. [2024-06-14 14:13:55,442 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 327 selfloop transitions, 198 changer transitions 0/533 dead transitions. [2024-06-14 14:13:55,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 533 transitions, 8738 flow [2024-06-14 14:13:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-14 14:13:55,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:13:55,443 INFO L175 Difference]: Start difference. First operand has 406 places, 496 transitions, 7036 flow. Second operand 10 states and 258 transitions. [2024-06-14 14:13:55,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 533 transitions, 8738 flow [2024-06-14 14:14:03,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 533 transitions, 8393 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 14:14:03,649 INFO L231 Difference]: Finished difference. Result has 407 places, 496 transitions, 7093 flow [2024-06-14 14:14:03,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6691, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7093, PETRI_PLACES=407, PETRI_TRANSITIONS=496} [2024-06-14 14:14:03,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-14 14:14:03,650 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 496 transitions, 7093 flow [2024-06-14 14:14:03,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:03,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:03,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:03,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 14:14:03,650 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 14:14:03,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:03,650 INFO L85 PathProgramCache]: Analyzing trace with hash 406663563, now seen corresponding path program 13 times [2024-06-14 14:14:03,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:03,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412907684] [2024-06-14 14:14:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:03,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:03,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412907684] [2024-06-14 14:14:03,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412907684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:03,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:03,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:03,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389630764] [2024-06-14 14:14:03,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:03,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:03,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:03,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:14:03,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 496 transitions, 7093 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:03,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:03,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:14:03,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:05,863 INFO L124 PetriNetUnfolderBase]: 4770/8209 cut-off events. [2024-06-14 14:14:05,863 INFO L125 PetriNetUnfolderBase]: For 1559580/1559580 co-relation queries the response was YES. [2024-06-14 14:14:06,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62100 conditions, 8209 events. 4770/8209 cut-off events. For 1559580/1559580 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 59923 event pairs, 1260 based on Foata normal form. 1/8206 useless extension candidates. Maximal degree in co-relation 61911. Up to 6869 conditions per place. [2024-06-14 14:14:06,074 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 202 changer transitions 0/531 dead transitions. [2024-06-14 14:14:06,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 531 transitions, 9071 flow [2024-06-14 14:14:06,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:14:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:14:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-14 14:14:06,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5953488372093023 [2024-06-14 14:14:06,076 INFO L175 Difference]: Start difference. First operand has 407 places, 496 transitions, 7093 flow. Second operand 10 states and 256 transitions. [2024-06-14 14:14:06,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 531 transitions, 9071 flow [2024-06-14 14:14:15,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 531 transitions, 8584 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 14:14:15,380 INFO L231 Difference]: Finished difference. Result has 407 places, 496 transitions, 7016 flow [2024-06-14 14:14:15,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6606, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7016, PETRI_PLACES=407, PETRI_TRANSITIONS=496} [2024-06-14 14:14:15,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-14 14:14:15,380 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 496 transitions, 7016 flow [2024-06-14 14:14:15,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:15,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:15,380 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 14:14:15,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 14:14:15,381 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 14:14:15,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2018834037, now seen corresponding path program 14 times [2024-06-14 14:14:15,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:15,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034785653] [2024-06-14 14:14:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:15,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:15,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:15,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034785653] [2024-06-14 14:14:15,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034785653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:15,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:15,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:15,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310083115] [2024-06-14 14:14:15,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:15,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:15,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:15,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:14:15,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 496 transitions, 7016 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:15,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:15,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:14:15,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:17,583 INFO L124 PetriNetUnfolderBase]: 4767/8217 cut-off events. [2024-06-14 14:14:17,583 INFO L125 PetriNetUnfolderBase]: For 1569275/1569275 co-relation queries the response was YES. [2024-06-14 14:14:17,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62016 conditions, 8217 events. 4767/8217 cut-off events. For 1569275/1569275 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 60123 event pairs, 1270 based on Foata normal form. 1/8214 useless extension candidates. Maximal degree in co-relation 61826. Up to 6867 conditions per place. [2024-06-14 14:14:17,695 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 208 changer transitions 0/537 dead transitions. [2024-06-14 14:14:17,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 537 transitions, 8744 flow [2024-06-14 14:14:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:14:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:14:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 279 transitions. [2024-06-14 14:14:17,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5898520084566596 [2024-06-14 14:14:17,697 INFO L175 Difference]: Start difference. First operand has 407 places, 496 transitions, 7016 flow. Second operand 11 states and 279 transitions. [2024-06-14 14:14:17,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 537 transitions, 8744 flow [2024-06-14 14:14:25,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 537 transitions, 8413 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:14:25,635 INFO L231 Difference]: Finished difference. Result has 412 places, 496 transitions, 7107 flow [2024-06-14 14:14:25,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6685, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7107, PETRI_PLACES=412, PETRI_TRANSITIONS=496} [2024-06-14 14:14:25,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-14 14:14:25,635 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 496 transitions, 7107 flow [2024-06-14 14:14:25,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:25,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:25,636 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 14:14:25,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 14:14:25,636 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 14:14:25,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1738380095, now seen corresponding path program 15 times [2024-06-14 14:14:25,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:25,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907422318] [2024-06-14 14:14:25,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:25,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:25,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:25,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907422318] [2024-06-14 14:14:25,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907422318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:25,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:25,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:25,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924321328] [2024-06-14 14:14:25,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:25,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:25,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:25,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:25,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:14:25,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 496 transitions, 7107 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:25,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:25,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:14:25,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:27,838 INFO L124 PetriNetUnfolderBase]: 4788/8240 cut-off events. [2024-06-14 14:14:27,838 INFO L125 PetriNetUnfolderBase]: For 1612906/1612906 co-relation queries the response was YES. [2024-06-14 14:14:28,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62785 conditions, 8240 events. 4788/8240 cut-off events. For 1612906/1612906 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 60188 event pairs, 1253 based on Foata normal form. 1/8237 useless extension candidates. Maximal degree in co-relation 62594. Up to 6889 conditions per place. [2024-06-14 14:14:28,080 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 324 selfloop transitions, 220 changer transitions 0/552 dead transitions. [2024-06-14 14:14:28,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 552 transitions, 9569 flow [2024-06-14 14:14:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-14 14:14:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-14 14:14:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 400 transitions. [2024-06-14 14:14:28,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471956224350205 [2024-06-14 14:14:28,082 INFO L175 Difference]: Start difference. First operand has 412 places, 496 transitions, 7107 flow. Second operand 17 states and 400 transitions. [2024-06-14 14:14:28,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 552 transitions, 9569 flow [2024-06-14 14:14:37,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 552 transitions, 9107 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-14 14:14:37,393 INFO L231 Difference]: Finished difference. Result has 419 places, 503 transitions, 7210 flow [2024-06-14 14:14:37,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6657, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7210, PETRI_PLACES=419, PETRI_TRANSITIONS=503} [2024-06-14 14:14:37,393 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-14 14:14:37,393 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 503 transitions, 7210 flow [2024-06-14 14:14:37,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:37,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:37,394 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 14:14:37,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 14:14:37,394 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 14:14:37,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash 516396955, now seen corresponding path program 16 times [2024-06-14 14:14:37,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:37,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104273356] [2024-06-14 14:14:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:37,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:37,584 INFO 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 14:14:37,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:37,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104273356] [2024-06-14 14:14:37,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104273356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:37,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:37,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:37,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727548379] [2024-06-14 14:14:37,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:37,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:37,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:37,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:37,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:37,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:14:37,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 503 transitions, 7210 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:37,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:37,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:14:37,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:39,795 INFO L124 PetriNetUnfolderBase]: 4782/8236 cut-off events. [2024-06-14 14:14:39,795 INFO L125 PetriNetUnfolderBase]: For 1624028/1624028 co-relation queries the response was YES. [2024-06-14 14:14:39,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62597 conditions, 8236 events. 4782/8236 cut-off events. For 1624028/1624028 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 60235 event pairs, 1255 based on Foata normal form. 2/8234 useless extension candidates. Maximal degree in co-relation 62405. Up to 6884 conditions per place. [2024-06-14 14:14:39,912 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 318 selfloop transitions, 214 changer transitions 0/540 dead transitions. [2024-06-14 14:14:39,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 540 transitions, 9228 flow [2024-06-14 14:14:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:14:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:14:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 296 transitions. [2024-06-14 14:14:39,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-14 14:14:39,913 INFO L175 Difference]: Start difference. First operand has 419 places, 503 transitions, 7210 flow. Second operand 12 states and 296 transitions. [2024-06-14 14:14:39,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 540 transitions, 9228 flow [2024-06-14 14:14:47,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 540 transitions, 8766 flow, removed 16 selfloop flow, removed 14 redundant places. [2024-06-14 14:14:47,150 INFO L231 Difference]: Finished difference. Result has 417 places, 503 transitions, 7183 flow [2024-06-14 14:14:47,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6748, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7183, PETRI_PLACES=417, PETRI_TRANSITIONS=503} [2024-06-14 14:14:47,151 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-14 14:14:47,151 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 503 transitions, 7183 flow [2024-06-14 14:14:47,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:47,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:47,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:47,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 14:14:47,152 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 14:14:47,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:47,152 INFO L85 PathProgramCache]: Analyzing trace with hash 721292603, now seen corresponding path program 17 times [2024-06-14 14:14:47,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:47,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292156531] [2024-06-14 14:14:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:47,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:47,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:47,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292156531] [2024-06-14 14:14:47,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292156531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:47,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:47,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:47,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934211319] [2024-06-14 14:14:47,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:47,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:47,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:47,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:47,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:47,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:14:47,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 503 transitions, 7183 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:47,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:47,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:14:47,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:49,338 INFO L124 PetriNetUnfolderBase]: 4792/8224 cut-off events. [2024-06-14 14:14:49,339 INFO L125 PetriNetUnfolderBase]: For 1647120/1647120 co-relation queries the response was YES. [2024-06-14 14:14:49,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62814 conditions, 8224 events. 4792/8224 cut-off events. For 1647120/1647120 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 60093 event pairs, 1279 based on Foata normal form. 2/8207 useless extension candidates. Maximal degree in co-relation 62621. Up to 6894 conditions per place. [2024-06-14 14:14:49,459 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 311 selfloop transitions, 210 changer transitions 0/529 dead transitions. [2024-06-14 14:14:49,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 529 transitions, 9222 flow [2024-06-14 14:14:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:14:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:14:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-14 14:14:49,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5839793281653747 [2024-06-14 14:14:49,460 INFO L175 Difference]: Start difference. First operand has 417 places, 503 transitions, 7183 flow. Second operand 9 states and 226 transitions. [2024-06-14 14:14:49,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 529 transitions, 9222 flow [2024-06-14 14:14:57,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 529 transitions, 8788 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 14:14:57,960 INFO L231 Difference]: Finished difference. Result has 415 places, 507 transitions, 7251 flow [2024-06-14 14:14:57,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7251, PETRI_PLACES=415, PETRI_TRANSITIONS=507} [2024-06-14 14:14:57,960 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 14:14:57,961 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 507 transitions, 7251 flow [2024-06-14 14:14:57,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:57,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:57,961 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 14:14:57,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 14:14:57,961 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 14:14:57,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:57,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2001611219, now seen corresponding path program 18 times [2024-06-14 14:14:57,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:57,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576701697] [2024-06-14 14:14:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:57,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:58,141 INFO 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 14:14:58,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:58,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576701697] [2024-06-14 14:14:58,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576701697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:58,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:58,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:58,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759654203] [2024-06-14 14:14:58,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:58,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:58,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:58,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:58,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:58,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:14:58,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 507 transitions, 7251 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:58,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:58,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:14:58,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:00,079 INFO L124 PetriNetUnfolderBase]: 4802/8242 cut-off events. [2024-06-14 14:15:00,080 INFO L125 PetriNetUnfolderBase]: For 1669262/1669262 co-relation queries the response was YES. [2024-06-14 14:15:00,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63038 conditions, 8242 events. 4802/8242 cut-off events. For 1669262/1669262 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 60249 event pairs, 1279 based on Foata normal form. 2/8225 useless extension candidates. Maximal degree in co-relation 62844. Up to 6904 conditions per place. [2024-06-14 14:15:00,200 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 312 selfloop transitions, 215 changer transitions 0/535 dead transitions. [2024-06-14 14:15:00,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 535 transitions, 9314 flow [2024-06-14 14:15:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:15:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:15:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-14 14:15:00,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5623678646934461 [2024-06-14 14:15:00,201 INFO L175 Difference]: Start difference. First operand has 415 places, 507 transitions, 7251 flow. Second operand 11 states and 266 transitions. [2024-06-14 14:15:00,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 535 transitions, 9314 flow [2024-06-14 14:15:07,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 535 transitions, 8763 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 14:15:07,455 INFO L231 Difference]: Finished difference. Result has 419 places, 511 transitions, 7214 flow [2024-06-14 14:15:07,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6720, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7214, PETRI_PLACES=419, PETRI_TRANSITIONS=511} [2024-06-14 14:15:07,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-14 14:15:07,455 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 511 transitions, 7214 flow [2024-06-14 14:15:07,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:07,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:07,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:07,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 14:15:07,456 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 14:15:07,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:07,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2085325421, now seen corresponding path program 19 times [2024-06-14 14:15:07,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:07,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607290278] [2024-06-14 14:15:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:07,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:07,636 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 14:15:07,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:07,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607290278] [2024-06-14 14:15:07,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607290278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:07,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:07,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:15:07,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585807030] [2024-06-14 14:15:07,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:07,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:15:07,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:07,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:15:07,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:15:07,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:15:07,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 511 transitions, 7214 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:07,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:07,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:15:07,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:09,600 INFO L124 PetriNetUnfolderBase]: 4796/8234 cut-off events. [2024-06-14 14:15:09,600 INFO L125 PetriNetUnfolderBase]: For 1667918/1667918 co-relation queries the response was YES. [2024-06-14 14:15:09,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62730 conditions, 8234 events. 4796/8234 cut-off events. For 1667918/1667918 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 60187 event pairs, 1279 based on Foata normal form. 2/8217 useless extension candidates. Maximal degree in co-relation 62535. Up to 6899 conditions per place. [2024-06-14 14:15:09,716 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 310 selfloop transitions, 216 changer transitions 0/534 dead transitions. [2024-06-14 14:15:09,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 534 transitions, 9202 flow [2024-06-14 14:15:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:15:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:15:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-14 14:15:09,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5651162790697675 [2024-06-14 14:15:09,718 INFO L175 Difference]: Start difference. First operand has 419 places, 511 transitions, 7214 flow. Second operand 10 states and 243 transitions. [2024-06-14 14:15:09,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 534 transitions, 9202 flow [2024-06-14 14:15:16,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 534 transitions, 8752 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 14:15:16,787 INFO L231 Difference]: Finished difference. Result has 420 places, 511 transitions, 7203 flow [2024-06-14 14:15:16,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6764, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7203, PETRI_PLACES=420, PETRI_TRANSITIONS=511} [2024-06-14 14:15:16,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-14 14:15:16,788 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 511 transitions, 7203 flow [2024-06-14 14:15:16,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:16,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:16,788 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 14:15:16,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 14:15:16,788 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 14:15:16,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash -672163251, now seen corresponding path program 7 times [2024-06-14 14:15:16,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:16,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163838800] [2024-06-14 14:15:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:17,010 INFO 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 14:15:17,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:17,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163838800] [2024-06-14 14:15:17,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163838800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:17,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:17,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:17,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697932528] [2024-06-14 14:15:17,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:17,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:17,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:17,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:17,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:17,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:15:17,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 511 transitions, 7203 flow. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:17,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:17,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:15:17,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:19,009 INFO L124 PetriNetUnfolderBase]: 4832/8306 cut-off events. [2024-06-14 14:15:19,010 INFO L125 PetriNetUnfolderBase]: For 1783754/1783754 co-relation queries the response was YES. [2024-06-14 14:15:19,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63572 conditions, 8306 events. 4832/8306 cut-off events. For 1783754/1783754 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 60822 event pairs, 1261 based on Foata normal form. 10/8307 useless extension candidates. Maximal degree in co-relation 63376. Up to 7326 conditions per place. [2024-06-14 14:15:19,125 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 416 selfloop transitions, 113 changer transitions 0/537 dead transitions. [2024-06-14 14:15:19,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 537 transitions, 8445 flow [2024-06-14 14:15:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:15:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:15:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-14 14:15:19,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558139534883721 [2024-06-14 14:15:19,127 INFO L175 Difference]: Start difference. First operand has 420 places, 511 transitions, 7203 flow. Second operand 10 states and 239 transitions. [2024-06-14 14:15:19,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 537 transitions, 8445 flow [2024-06-14 14:15:27,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 537 transitions, 7961 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 14:15:27,981 INFO L231 Difference]: Finished difference. Result has 420 places, 513 transitions, 7069 flow [2024-06-14 14:15:27,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6719, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7069, PETRI_PLACES=420, PETRI_TRANSITIONS=513} [2024-06-14 14:15:27,981 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-14 14:15:27,981 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 513 transitions, 7069 flow [2024-06-14 14:15:27,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:27,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:27,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:27,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 14:15:27,982 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 14:15:27,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash -672223701, now seen corresponding path program 8 times [2024-06-14 14:15:27,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:27,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414068297] [2024-06-14 14:15:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:27,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:28,192 INFO 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 14:15:28,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:28,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414068297] [2024-06-14 14:15:28,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414068297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:28,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:28,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:28,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687600278] [2024-06-14 14:15:28,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:28,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:28,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:28,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:28,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:15:28,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 513 transitions, 7069 flow. Second operand has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:28,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:28,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:15:28,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:30,227 INFO L124 PetriNetUnfolderBase]: 4855/8359 cut-off events. [2024-06-14 14:15:30,228 INFO L125 PetriNetUnfolderBase]: For 1786019/1786019 co-relation queries the response was YES. [2024-06-14 14:15:30,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63488 conditions, 8359 events. 4855/8359 cut-off events. For 1786019/1786019 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 61476 event pairs, 1258 based on Foata normal form. 10/8360 useless extension candidates. Maximal degree in co-relation 63292. Up to 7235 conditions per place. [2024-06-14 14:15:30,349 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 418 selfloop transitions, 118 changer transitions 0/544 dead transitions. [2024-06-14 14:15:30,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 544 transitions, 8353 flow [2024-06-14 14:15:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:15:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:15:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-14 14:15:30,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539112050739958 [2024-06-14 14:15:30,350 INFO L175 Difference]: Start difference. First operand has 420 places, 513 transitions, 7069 flow. Second operand 11 states and 262 transitions. [2024-06-14 14:15:30,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 544 transitions, 8353 flow [2024-06-14 14:15:39,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 544 transitions, 8033 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-14 14:15:39,457 INFO L231 Difference]: Finished difference. Result has 423 places, 515 transitions, 7112 flow [2024-06-14 14:15:39,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7112, PETRI_PLACES=423, PETRI_TRANSITIONS=515} [2024-06-14 14:15:39,457 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-14 14:15:39,457 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 515 transitions, 7112 flow [2024-06-14 14:15:39,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:39,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:39,458 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 14:15:39,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 14:15:39,458 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 14:15:39,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1066239995, now seen corresponding path program 20 times [2024-06-14 14:15:39,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:39,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49770533] [2024-06-14 14:15:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:39,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:39,671 INFO 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 14:15:39,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:39,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49770533] [2024-06-14 14:15:39,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49770533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:39,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:39,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:15:39,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243160917] [2024-06-14 14:15:39,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:39,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:15:39,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:39,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:15:39,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:15:39,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:15:39,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 515 transitions, 7112 flow. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:39,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:39,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:15:39,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:41,689 INFO L124 PetriNetUnfolderBase]: 4849/8339 cut-off events. [2024-06-14 14:15:41,689 INFO L125 PetriNetUnfolderBase]: For 1693970/1693970 co-relation queries the response was YES. [2024-06-14 14:15:41,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62926 conditions, 8339 events. 4849/8339 cut-off events. For 1693970/1693970 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 61269 event pairs, 1300 based on Foata normal form. 2/8322 useless extension candidates. Maximal degree in co-relation 62729. Up to 6987 conditions per place. [2024-06-14 14:15:41,812 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 313 selfloop transitions, 216 changer transitions 0/537 dead transitions. [2024-06-14 14:15:41,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 537 transitions, 8822 flow [2024-06-14 14:15:41,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:15:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:15:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 14:15:41,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-14 14:15:41,813 INFO L175 Difference]: Start difference. First operand has 423 places, 515 transitions, 7112 flow. Second operand 10 states and 245 transitions. [2024-06-14 14:15:41,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 537 transitions, 8822 flow [2024-06-14 14:15:51,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 537 transitions, 8479 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-14 14:15:51,334 INFO L231 Difference]: Finished difference. Result has 424 places, 515 transitions, 7208 flow [2024-06-14 14:15:51,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6769, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7208, PETRI_PLACES=424, PETRI_TRANSITIONS=515} [2024-06-14 14:15:51,335 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-14 14:15:51,335 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 515 transitions, 7208 flow [2024-06-14 14:15:51,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:51,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:51,335 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 14:15:51,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 14:15:51,335 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 14:15:51,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1668821707, now seen corresponding path program 4 times [2024-06-14 14:15:51,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:51,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339801092] [2024-06-14 14:15:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:51,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:51,554 INFO 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 14:15:51,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:51,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339801092] [2024-06-14 14:15:51,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339801092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:51,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:51,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:15:51,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297122355] [2024-06-14 14:15:51,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:51,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:15:51,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:51,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:15:51,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:15:51,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:15:51,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 515 transitions, 7208 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:51,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:51,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:15:51,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:53,672 INFO L124 PetriNetUnfolderBase]: 4870/8386 cut-off events. [2024-06-14 14:15:53,679 INFO L125 PetriNetUnfolderBase]: For 1734204/1734204 co-relation queries the response was YES. [2024-06-14 14:15:53,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63586 conditions, 8386 events. 4870/8386 cut-off events. For 1734204/1734204 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 61638 event pairs, 1265 based on Foata normal form. 2/8383 useless extension candidates. Maximal degree in co-relation 63388. Up to 7367 conditions per place. [2024-06-14 14:15:53,802 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 445 selfloop transitions, 94 changer transitions 2/549 dead transitions. [2024-06-14 14:15:53,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 549 transitions, 8834 flow [2024-06-14 14:15:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:15:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:15:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-14 14:15:53,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762273901808785 [2024-06-14 14:15:53,804 INFO L175 Difference]: Start difference. First operand has 424 places, 515 transitions, 7208 flow. Second operand 9 states and 223 transitions. [2024-06-14 14:15:53,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 549 transitions, 8834 flow [2024-06-14 14:16:04,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 549 transitions, 8439 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:16:04,430 INFO L231 Difference]: Finished difference. Result has 426 places, 519 transitions, 7183 flow [2024-06-14 14:16:04,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6813, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7183, PETRI_PLACES=426, PETRI_TRANSITIONS=519} [2024-06-14 14:16:04,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-14 14:16:04,430 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 519 transitions, 7183 flow [2024-06-14 14:16:04,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:04,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:04,431 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 14:16:04,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 14:16:04,431 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:04,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:04,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1546498151, now seen corresponding path program 5 times [2024-06-14 14:16:04,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:04,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573062071] [2024-06-14 14:16:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:04,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:04,637 INFO 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 14:16:04,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:04,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573062071] [2024-06-14 14:16:04,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573062071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:04,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:04,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:16:04,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570395759] [2024-06-14 14:16:04,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:04,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:16:04,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:04,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:16:04,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:16:04,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:16:04,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 519 transitions, 7183 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:04,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:04,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:16:04,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:06,888 INFO L124 PetriNetUnfolderBase]: 4865/8389 cut-off events. [2024-06-14 14:16:06,888 INFO L125 PetriNetUnfolderBase]: For 1733416/1733416 co-relation queries the response was YES. [2024-06-14 14:16:06,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63075 conditions, 8389 events. 4865/8389 cut-off events. For 1733416/1733416 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 61745 event pairs, 1284 based on Foata normal form. 2/8387 useless extension candidates. Maximal degree in co-relation 62876. Up to 7417 conditions per place. [2024-06-14 14:16:07,011 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 444 selfloop transitions, 89 changer transitions 0/541 dead transitions. [2024-06-14 14:16:07,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 541 transitions, 8303 flow [2024-06-14 14:16:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:16:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:16:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 14:16:07,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726744186046512 [2024-06-14 14:16:07,013 INFO L175 Difference]: Start difference. First operand has 426 places, 519 transitions, 7183 flow. Second operand 8 states and 197 transitions. [2024-06-14 14:16:07,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 541 transitions, 8303 flow [2024-06-14 14:16:16,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 541 transitions, 8001 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 14:16:16,426 INFO L231 Difference]: Finished difference. Result has 428 places, 519 transitions, 7064 flow [2024-06-14 14:16:16,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6881, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7064, PETRI_PLACES=428, PETRI_TRANSITIONS=519} [2024-06-14 14:16:16,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-14 14:16:16,426 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 519 transitions, 7064 flow [2024-06-14 14:16:16,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:16,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:16,427 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, 1] [2024-06-14 14:16:16,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 14:16:16,427 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:16,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:16,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2010254229, now seen corresponding path program 6 times [2024-06-14 14:16:16,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:16,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185187539] [2024-06-14 14:16:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:16,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:16,613 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 14:16:16,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:16,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185187539] [2024-06-14 14:16:16,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185187539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:16,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:16,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:16:16,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553428941] [2024-06-14 14:16:16,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:16,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:16:16,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:16,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:16:16,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:16:16,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:16:16,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 519 transitions, 7064 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:16,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:16,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:16:16,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:18,741 INFO L124 PetriNetUnfolderBase]: 4932/8502 cut-off events. [2024-06-14 14:16:18,741 INFO L125 PetriNetUnfolderBase]: For 1874764/1874764 co-relation queries the response was YES. [2024-06-14 14:16:18,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65534 conditions, 8502 events. 4932/8502 cut-off events. For 1874764/1874764 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 62691 event pairs, 1296 based on Foata normal form. 2/8499 useless extension candidates. Maximal degree in co-relation 65334. Up to 7431 conditions per place. [2024-06-14 14:16:18,875 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 450 selfloop transitions, 97 changer transitions 0/555 dead transitions. [2024-06-14 14:16:18,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 555 transitions, 8724 flow [2024-06-14 14:16:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:16:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:16:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 14:16:18,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-14 14:16:18,877 INFO L175 Difference]: Start difference. First operand has 428 places, 519 transitions, 7064 flow. Second operand 10 states and 245 transitions. [2024-06-14 14:16:18,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 555 transitions, 8724 flow [2024-06-14 14:16:28,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 555 transitions, 8526 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 14:16:28,274 INFO L231 Difference]: Finished difference. Result has 432 places, 523 transitions, 7252 flow [2024-06-14 14:16:28,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6866, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7252, PETRI_PLACES=432, PETRI_TRANSITIONS=523} [2024-06-14 14:16:28,274 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-14 14:16:28,274 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 523 transitions, 7252 flow [2024-06-14 14:16:28,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:28,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:28,275 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 14:16:28,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 14:16:28,275 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:28,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:28,275 INFO L85 PathProgramCache]: Analyzing trace with hash 192985505, now seen corresponding path program 7 times [2024-06-14 14:16:28,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:28,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097571937] [2024-06-14 14:16:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:28,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:28,463 INFO 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 14:16:28,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:28,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097571937] [2024-06-14 14:16:28,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097571937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:28,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:28,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:16:28,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909528951] [2024-06-14 14:16:28,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:28,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:16:28,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:28,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:16:28,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:16:28,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:16:28,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 523 transitions, 7252 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:28,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:28,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:16:28,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:30,565 INFO L124 PetriNetUnfolderBase]: 4940/8522 cut-off events. [2024-06-14 14:16:30,566 INFO L125 PetriNetUnfolderBase]: For 1901032/1901032 co-relation queries the response was YES. [2024-06-14 14:16:30,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66071 conditions, 8522 events. 4940/8522 cut-off events. For 1901032/1901032 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 62939 event pairs, 1306 based on Foata normal form. 2/8520 useless extension candidates. Maximal degree in co-relation 65869. Up to 7530 conditions per place. [2024-06-14 14:16:30,698 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 449 selfloop transitions, 92 changer transitions 0/549 dead transitions. [2024-06-14 14:16:30,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 549 transitions, 8485 flow [2024-06-14 14:16:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:16:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:16:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-14 14:16:30,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511627906976744 [2024-06-14 14:16:30,700 INFO L175 Difference]: Start difference. First operand has 432 places, 523 transitions, 7252 flow. Second operand 10 states and 237 transitions. [2024-06-14 14:16:30,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 549 transitions, 8485 flow [2024-06-14 14:16:40,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 549 transitions, 8209 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 14:16:40,608 INFO L231 Difference]: Finished difference. Result has 435 places, 525 transitions, 7262 flow [2024-06-14 14:16:40,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6988, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7262, PETRI_PLACES=435, PETRI_TRANSITIONS=525} [2024-06-14 14:16:40,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-14 14:16:40,609 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 525 transitions, 7262 flow [2024-06-14 14:16:40,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:40,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:40,609 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 14:16:40,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 14:16:40,609 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:40,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:40,610 INFO L85 PathProgramCache]: Analyzing trace with hash 941516431, now seen corresponding path program 8 times [2024-06-14 14:16:40,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:40,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175480560] [2024-06-14 14:16:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:40,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:40,795 INFO 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 14:16:40,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:40,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175480560] [2024-06-14 14:16:40,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175480560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:40,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:40,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:16:40,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611787444] [2024-06-14 14:16:40,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:16:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:16:40,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:16:40,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:16:40,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 525 transitions, 7262 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:40,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:40,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:16:40,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:42,922 INFO L124 PetriNetUnfolderBase]: 4948/8530 cut-off events. [2024-06-14 14:16:42,922 INFO L125 PetriNetUnfolderBase]: For 1924173/1924173 co-relation queries the response was YES. [2024-06-14 14:16:43,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66168 conditions, 8530 events. 4948/8530 cut-off events. For 1924173/1924173 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 62995 event pairs, 1112 based on Foata normal form. 2/8528 useless extension candidates. Maximal degree in co-relation 65965. Up to 6695 conditions per place. [2024-06-14 14:16:43,055 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 438 selfloop transitions, 117 changer transitions 0/563 dead transitions. [2024-06-14 14:16:43,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 563 transitions, 9191 flow [2024-06-14 14:16:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:16:43,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:16:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-14 14:16:43,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943152454780362 [2024-06-14 14:16:43,056 INFO L175 Difference]: Start difference. First operand has 435 places, 525 transitions, 7262 flow. Second operand 9 states and 230 transitions. [2024-06-14 14:16:43,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 563 transitions, 9191 flow [2024-06-14 14:16:54,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 563 transitions, 8944 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 14:16:54,193 INFO L231 Difference]: Finished difference. Result has 436 places, 527 transitions, 7341 flow [2024-06-14 14:16:54,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7015, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7341, PETRI_PLACES=436, PETRI_TRANSITIONS=527} [2024-06-14 14:16:54,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-14 14:16:54,194 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 527 transitions, 7341 flow [2024-06-14 14:16:54,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:54,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:54,194 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 14:16:54,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 14:16:54,195 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:54,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:54,195 INFO L85 PathProgramCache]: Analyzing trace with hash -519881621, now seen corresponding path program 9 times [2024-06-14 14:16:54,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:54,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124183531] [2024-06-14 14:16:54,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:54,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:54,373 INFO 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 14:16:54,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:54,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124183531] [2024-06-14 14:16:54,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124183531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:54,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:54,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:16:54,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236765033] [2024-06-14 14:16:54,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:54,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:16:54,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:54,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:16:54,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:16:54,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:16:54,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 527 transitions, 7341 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:54,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:54,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:16:54,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:56,468 INFO L124 PetriNetUnfolderBase]: 4923/8479 cut-off events. [2024-06-14 14:16:56,468 INFO L125 PetriNetUnfolderBase]: For 1924825/1924825 co-relation queries the response was YES. [2024-06-14 14:16:56,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64995 conditions, 8479 events. 4923/8479 cut-off events. For 1924825/1924825 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 62451 event pairs, 1123 based on Foata normal form. 8/8483 useless extension candidates. Maximal degree in co-relation 64791. Up to 6681 conditions per place. [2024-06-14 14:16:56,607 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 438 selfloop transitions, 114 changer transitions 0/560 dead transitions. [2024-06-14 14:16:56,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 560 transitions, 8863 flow [2024-06-14 14:16:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:16:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:16:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-14 14:16:56,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58656330749354 [2024-06-14 14:16:56,608 INFO L175 Difference]: Start difference. First operand has 436 places, 527 transitions, 7341 flow. Second operand 9 states and 227 transitions. [2024-06-14 14:16:56,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 560 transitions, 8863 flow [2024-06-14 14:17:05,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 560 transitions, 8481 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-14 14:17:05,732 INFO L231 Difference]: Finished difference. Result has 437 places, 527 transitions, 7193 flow [2024-06-14 14:17:05,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6959, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7193, PETRI_PLACES=437, PETRI_TRANSITIONS=527} [2024-06-14 14:17:05,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-14 14:17:05,733 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 527 transitions, 7193 flow [2024-06-14 14:17:05,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:05,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:05,733 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 14:17:05,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 14:17:05,733 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:05,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:05,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2079785877, now seen corresponding path program 10 times [2024-06-14 14:17:05,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:05,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116601815] [2024-06-14 14:17:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:05,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:05,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:05,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116601815] [2024-06-14 14:17:05,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116601815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:05,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:05,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:17:05,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754221887] [2024-06-14 14:17:05,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:05,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:17:05,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:05,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:17:05,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:17:05,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:17:05,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 527 transitions, 7193 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:05,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:05,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:17:05,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:07,953 INFO L124 PetriNetUnfolderBase]: 4900/8464 cut-off events. [2024-06-14 14:17:07,953 INFO L125 PetriNetUnfolderBase]: For 1844254/1844254 co-relation queries the response was YES. [2024-06-14 14:17:08,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62735 conditions, 8464 events. 4900/8464 cut-off events. For 1844254/1844254 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 62586 event pairs, 1288 based on Foata normal form. 10/8470 useless extension candidates. Maximal degree in co-relation 62532. Up to 7438 conditions per place. [2024-06-14 14:17:08,077 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 452 selfloop transitions, 89 changer transitions 0/549 dead transitions. [2024-06-14 14:17:08,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 549 transitions, 8341 flow [2024-06-14 14:17:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:17:08,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:17:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:17:08,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-14 14:17:08,078 INFO L175 Difference]: Start difference. First operand has 437 places, 527 transitions, 7193 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:17:08,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 549 transitions, 8341 flow [2024-06-14 14:17:16,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 549 transitions, 8044 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 14:17:16,745 INFO L231 Difference]: Finished difference. Result has 437 places, 527 transitions, 7080 flow [2024-06-14 14:17:16,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6896, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7080, PETRI_PLACES=437, PETRI_TRANSITIONS=527} [2024-06-14 14:17:16,745 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-14 14:17:16,745 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 527 transitions, 7080 flow [2024-06-14 14:17:16,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:16,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:16,746 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 14:17:16,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 14:17:16,746 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:16,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:16,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2069310357, now seen corresponding path program 11 times [2024-06-14 14:17:16,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:16,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668360857] [2024-06-14 14:17:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:16,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:16,929 INFO 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 14:17:16,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:16,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668360857] [2024-06-14 14:17:16,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668360857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:16,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:16,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:17:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959925646] [2024-06-14 14:17:16,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:16,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:17:16,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:16,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:17:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:17:16,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:17:16,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 527 transitions, 7080 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:16,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:16,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:17:16,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:18,871 INFO L124 PetriNetUnfolderBase]: 4870/8416 cut-off events. [2024-06-14 14:17:18,871 INFO L125 PetriNetUnfolderBase]: For 1737442/1737442 co-relation queries the response was YES. [2024-06-14 14:17:19,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60399 conditions, 8416 events. 4870/8416 cut-off events. For 1737442/1737442 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 62189 event pairs, 1258 based on Foata normal form. 10/8422 useless extension candidates. Maximal degree in co-relation 60195. Up to 7176 conditions per place. [2024-06-14 14:17:19,144 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 450 selfloop transitions, 95 changer transitions 0/553 dead transitions. [2024-06-14 14:17:19,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 553 transitions, 8258 flow [2024-06-14 14:17:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:17:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:17:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:17:19,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843023255813954 [2024-06-14 14:17:19,146 INFO L175 Difference]: Start difference. First operand has 437 places, 527 transitions, 7080 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:17:19,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 553 transitions, 8258 flow [2024-06-14 14:17:28,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 553 transitions, 8013 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 14:17:28,442 INFO L231 Difference]: Finished difference. Result has 438 places, 527 transitions, 7032 flow [2024-06-14 14:17:28,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6835, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7032, PETRI_PLACES=438, PETRI_TRANSITIONS=527} [2024-06-14 14:17:28,443 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-14 14:17:28,443 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 527 transitions, 7032 flow [2024-06-14 14:17:28,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:28,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:28,443 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 14:17:28,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 14:17:28,444 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:28,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash -257328273, now seen corresponding path program 12 times [2024-06-14 14:17:28,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:28,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317063126] [2024-06-14 14:17:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:28,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:28,617 INFO 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 14:17:28,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:28,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317063126] [2024-06-14 14:17:28,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317063126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:28,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:28,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:17:28,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207721466] [2024-06-14 14:17:28,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:28,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:17:28,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:28,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:17:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:17:28,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:17:28,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 527 transitions, 7032 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:28,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:28,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:17:28,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:30,614 INFO L124 PetriNetUnfolderBase]: 4906/8446 cut-off events. [2024-06-14 14:17:30,614 INFO L125 PetriNetUnfolderBase]: For 1760929/1760929 co-relation queries the response was YES. [2024-06-14 14:17:30,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60868 conditions, 8446 events. 4906/8446 cut-off events. For 1760929/1760929 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 62373 event pairs, 1306 based on Foata normal form. 10/8437 useless extension candidates. Maximal degree in co-relation 60663. Up to 7448 conditions per place. [2024-06-14 14:17:30,742 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 444 selfloop transitions, 92 changer transitions 0/544 dead transitions. [2024-06-14 14:17:30,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 544 transitions, 8239 flow [2024-06-14 14:17:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:17:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:17:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:17:30,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:17:30,744 INFO L175 Difference]: Start difference. First operand has 438 places, 527 transitions, 7032 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:17:30,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 544 transitions, 8239 flow [2024-06-14 14:17:40,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 544 transitions, 8020 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 14:17:40,126 INFO L231 Difference]: Finished difference. Result has 437 places, 529 transitions, 7094 flow [2024-06-14 14:17:40,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6813, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7094, PETRI_PLACES=437, PETRI_TRANSITIONS=529} [2024-06-14 14:17:40,126 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-14 14:17:40,127 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 529 transitions, 7094 flow [2024-06-14 14:17:40,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:40,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:40,127 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 14:17:40,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 14:17:40,127 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:40,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:40,127 INFO L85 PathProgramCache]: Analyzing trace with hash -172196309, now seen corresponding path program 13 times [2024-06-14 14:17:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:40,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152222203] [2024-06-14 14:17:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:40,304 INFO 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 14:17:40,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:40,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152222203] [2024-06-14 14:17:40,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152222203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:40,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:40,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:17:40,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952432189] [2024-06-14 14:17:40,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:40,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:17:40,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:40,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:17:40,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:17:40,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:17:40,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 529 transitions, 7094 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:40,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:40,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:17:40,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:42,257 INFO L124 PetriNetUnfolderBase]: 4942/8522 cut-off events. [2024-06-14 14:17:42,257 INFO L125 PetriNetUnfolderBase]: For 1785556/1785556 co-relation queries the response was YES. [2024-06-14 14:17:42,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61513 conditions, 8522 events. 4942/8522 cut-off events. For 1785556/1785556 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 63186 event pairs, 1324 based on Foata normal form. 10/8513 useless extension candidates. Maximal degree in co-relation 61307. Up to 7504 conditions per place. [2024-06-14 14:17:42,386 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 449 selfloop transitions, 89 changer transitions 0/546 dead transitions. [2024-06-14 14:17:42,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 546 transitions, 8309 flow [2024-06-14 14:17:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:17:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:17:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:17:42,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681063122923588 [2024-06-14 14:17:42,387 INFO L175 Difference]: Start difference. First operand has 437 places, 529 transitions, 7094 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:17:42,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 546 transitions, 8309 flow [2024-06-14 14:17:50,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 546 transitions, 8067 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 14:17:50,952 INFO L231 Difference]: Finished difference. Result has 439 places, 531 transitions, 7131 flow [2024-06-14 14:17:50,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6852, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7131, PETRI_PLACES=439, PETRI_TRANSITIONS=531} [2024-06-14 14:17:50,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-14 14:17:50,953 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 531 transitions, 7131 flow [2024-06-14 14:17:50,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:50,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:50,953 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 14:17:50,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 14:17:50,953 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:50,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:50,954 INFO L85 PathProgramCache]: Analyzing trace with hash -161720789, now seen corresponding path program 14 times [2024-06-14 14:17:50,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:50,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893510504] [2024-06-14 14:17:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:50,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:51,122 INFO 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 14:17:51,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:51,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893510504] [2024-06-14 14:17:51,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893510504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:51,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:51,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:17:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691044670] [2024-06-14 14:17:51,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:51,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:17:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:17:51,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:17:51,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:17:51,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 531 transitions, 7131 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:51,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:51,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:17:51,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:53,190 INFO L124 PetriNetUnfolderBase]: 4912/8466 cut-off events. [2024-06-14 14:17:53,190 INFO L125 PetriNetUnfolderBase]: For 1674131/1674131 co-relation queries the response was YES. [2024-06-14 14:17:53,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59361 conditions, 8466 events. 4912/8466 cut-off events. For 1674131/1674131 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 62534 event pairs, 1294 based on Foata normal form. 10/8457 useless extension candidates. Maximal degree in co-relation 59154. Up to 7130 conditions per place. [2024-06-14 14:17:53,325 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 446 selfloop transitions, 96 changer transitions 0/550 dead transitions. [2024-06-14 14:17:53,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 550 transitions, 8285 flow [2024-06-14 14:17:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:17:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:17:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:17:53,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780730897009967 [2024-06-14 14:17:53,326 INFO L175 Difference]: Start difference. First operand has 439 places, 531 transitions, 7131 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:17:53,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 550 transitions, 8285 flow [2024-06-14 14:18:01,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 550 transitions, 7997 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-14 14:18:01,473 INFO L231 Difference]: Finished difference. Result has 441 places, 531 transitions, 7043 flow [2024-06-14 14:18:01,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6843, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7043, PETRI_PLACES=441, PETRI_TRANSITIONS=531} [2024-06-14 14:18:01,474 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-14 14:18:01,474 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 531 transitions, 7043 flow [2024-06-14 14:18:01,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:01,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:01,474 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, 1] [2024-06-14 14:18:01,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 14:18:01,475 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:01,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:01,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1388935175, now seen corresponding path program 1 times [2024-06-14 14:18:01,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:01,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447231259] [2024-06-14 14:18:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:01,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:01,705 INFO 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 14:18:01,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:01,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447231259] [2024-06-14 14:18:01,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447231259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:01,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:01,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:18:01,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970574776] [2024-06-14 14:18:01,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:01,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:18:01,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:01,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:18:01,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:18:01,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:18:01,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 531 transitions, 7043 flow. Second operand has 9 states, 9 states have (on average 17.0) internal successors, (153), 9 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:01,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:01,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:18:01,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:04,025 INFO L124 PetriNetUnfolderBase]: 4978/8611 cut-off events. [2024-06-14 14:18:04,025 INFO L125 PetriNetUnfolderBase]: For 1744817/1744817 co-relation queries the response was YES. [2024-06-14 14:18:04,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61328 conditions, 8611 events. 4978/8611 cut-off events. For 1744817/1744817 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 63994 event pairs, 1067 based on Foata normal form. 6/8611 useless extension candidates. Maximal degree in co-relation 61120. Up to 7113 conditions per place. [2024-06-14 14:18:04,164 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 466 selfloop transitions, 92 changer transitions 0/566 dead transitions. [2024-06-14 14:18:04,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 566 transitions, 8997 flow [2024-06-14 14:18:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:18:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:18:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 14:18:04,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245847176079734 [2024-06-14 14:18:04,166 INFO L175 Difference]: Start difference. First operand has 441 places, 531 transitions, 7043 flow. Second operand 7 states and 188 transitions. [2024-06-14 14:18:04,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 566 transitions, 8997 flow [2024-06-14 14:18:14,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 566 transitions, 8764 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 14:18:14,625 INFO L231 Difference]: Finished difference. Result has 442 places, 533 transitions, 7076 flow [2024-06-14 14:18:14,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6810, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7076, PETRI_PLACES=442, PETRI_TRANSITIONS=533} [2024-06-14 14:18:14,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-14 14:18:14,626 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 533 transitions, 7076 flow [2024-06-14 14:18:14,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.0) internal successors, (153), 9 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:14,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:14,626 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, 1] [2024-06-14 14:18:14,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 14:18:14,626 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:14,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:14,626 INFO L85 PathProgramCache]: Analyzing trace with hash 550489893, now seen corresponding path program 2 times [2024-06-14 14:18:14,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:14,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363232990] [2024-06-14 14:18:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:14,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:14,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:14,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363232990] [2024-06-14 14:18:14,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363232990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:14,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:14,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:18:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984236458] [2024-06-14 14:18:14,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:14,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:18:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:18:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:18:14,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:18:14,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 533 transitions, 7076 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:14,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:14,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:18:14,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:16,947 INFO L124 PetriNetUnfolderBase]: 5031/8694 cut-off events. [2024-06-14 14:18:16,947 INFO L125 PetriNetUnfolderBase]: For 1849418/1849418 co-relation queries the response was YES. [2024-06-14 14:18:17,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63185 conditions, 8694 events. 5031/8694 cut-off events. For 1849418/1849418 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64664 event pairs, 1100 based on Foata normal form. 6/8694 useless extension candidates. Maximal degree in co-relation 62976. Up to 7143 conditions per place. [2024-06-14 14:18:17,246 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 467 selfloop transitions, 89 changer transitions 0/564 dead transitions. [2024-06-14 14:18:17,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 564 transitions, 9018 flow [2024-06-14 14:18:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:18:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:18:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:18:17,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013289036544851 [2024-06-14 14:18:17,248 INFO L175 Difference]: Start difference. First operand has 442 places, 533 transitions, 7076 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:18:17,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 564 transitions, 9018 flow [2024-06-14 14:18:27,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 564 transitions, 8869 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 14:18:27,449 INFO L231 Difference]: Finished difference. Result has 446 places, 535 transitions, 7192 flow [2024-06-14 14:18:27,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7192, PETRI_PLACES=446, PETRI_TRANSITIONS=535} [2024-06-14 14:18:27,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 402 predicate places. [2024-06-14 14:18:27,450 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 535 transitions, 7192 flow [2024-06-14 14:18:27,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:27,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:27,450 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, 1] [2024-06-14 14:18:27,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 14:18:27,450 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:27,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:27,451 INFO L85 PathProgramCache]: Analyzing trace with hash 876598407, now seen corresponding path program 3 times [2024-06-14 14:18:27,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:27,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294799824] [2024-06-14 14:18:27,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:27,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:27,622 INFO 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 14:18:27,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:27,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294799824] [2024-06-14 14:18:27,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294799824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:27,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:27,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:18:27,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124813332] [2024-06-14 14:18:27,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:27,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:18:27,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:27,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:18:27,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:18:27,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:18:27,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 535 transitions, 7192 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:27,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:27,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:18:27,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:29,804 INFO L124 PetriNetUnfolderBase]: 5018/8668 cut-off events. [2024-06-14 14:18:29,804 INFO L125 PetriNetUnfolderBase]: For 1788220/1788220 co-relation queries the response was YES. [2024-06-14 14:18:29,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62061 conditions, 8668 events. 5018/8668 cut-off events. For 1788220/1788220 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 64516 event pairs, 1296 based on Foata normal form. 6/8661 useless extension candidates. Maximal degree in co-relation 61851. Up to 7616 conditions per place. [2024-06-14 14:18:29,933 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 480 selfloop transitions, 72 changer transitions 0/560 dead transitions. [2024-06-14 14:18:29,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 560 transitions, 8704 flow [2024-06-14 14:18:29,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:18:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:18:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 14:18:29,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980066445182725 [2024-06-14 14:18:29,934 INFO L175 Difference]: Start difference. First operand has 446 places, 535 transitions, 7192 flow. Second operand 7 states and 180 transitions. [2024-06-14 14:18:29,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 560 transitions, 8704 flow [2024-06-14 14:18:39,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 560 transitions, 8533 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 14:18:39,047 INFO L231 Difference]: Finished difference. Result has 450 places, 535 transitions, 7169 flow [2024-06-14 14:18:39,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7021, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7169, PETRI_PLACES=450, PETRI_TRANSITIONS=535} [2024-06-14 14:18:39,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 406 predicate places. [2024-06-14 14:18:39,047 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 535 transitions, 7169 flow [2024-06-14 14:18:39,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:39,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:39,048 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, 1] [2024-06-14 14:18:39,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 14:18:39,048 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:39,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:39,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1130598147, now seen corresponding path program 4 times [2024-06-14 14:18:39,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:39,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940254714] [2024-06-14 14:18:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:39,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:39,217 INFO 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 14:18:39,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:39,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940254714] [2024-06-14 14:18:39,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940254714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:39,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:39,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:18:39,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370037824] [2024-06-14 14:18:39,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:39,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:18:39,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:18:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:18:39,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:18:39,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 535 transitions, 7169 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:39,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:39,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:18:39,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:41,443 INFO L124 PetriNetUnfolderBase]: 5000/8663 cut-off events. [2024-06-14 14:18:41,443 INFO L125 PetriNetUnfolderBase]: For 1724416/1724416 co-relation queries the response was YES. [2024-06-14 14:18:41,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60257 conditions, 8663 events. 5000/8663 cut-off events. For 1724416/1724416 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64640 event pairs, 1207 based on Foata normal form. 8/8665 useless extension candidates. Maximal degree in co-relation 60046. Up to 7514 conditions per place. [2024-06-14 14:18:41,574 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 473 selfloop transitions, 77 changer transitions 0/558 dead transitions. [2024-06-14 14:18:41,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 558 transitions, 8679 flow [2024-06-14 14:18:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:18:41,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:18:41,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:18:41,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-14 14:18:41,575 INFO L175 Difference]: Start difference. First operand has 450 places, 535 transitions, 7169 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:18:41,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 558 transitions, 8679 flow [2024-06-14 14:18:49,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 558 transitions, 8372 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 14:18:49,915 INFO L231 Difference]: Finished difference. Result has 449 places, 535 transitions, 7024 flow [2024-06-14 14:18:49,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6862, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7024, PETRI_PLACES=449, PETRI_TRANSITIONS=535} [2024-06-14 14:18:49,916 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-14 14:18:49,916 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 535 transitions, 7024 flow [2024-06-14 14:18:49,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:49,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:49,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:49,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 14:18:49,916 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:49,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1133455107, now seen corresponding path program 5 times [2024-06-14 14:18:49,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:49,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644052000] [2024-06-14 14:18:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:49,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:50,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:50,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644052000] [2024-06-14 14:18:50,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644052000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:50,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:50,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:18:50,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052089517] [2024-06-14 14:18:50,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:50,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:18:50,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:50,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:18:50,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:18:50,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:18:50,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 535 transitions, 7024 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:50,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:50,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:18:50,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:52,241 INFO L124 PetriNetUnfolderBase]: 5028/8707 cut-off events. [2024-06-14 14:18:52,242 INFO L125 PetriNetUnfolderBase]: For 1745552/1745552 co-relation queries the response was YES. [2024-06-14 14:18:52,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60294 conditions, 8707 events. 5028/8707 cut-off events. For 1745552/1745552 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 65039 event pairs, 1309 based on Foata normal form. 8/8709 useless extension candidates. Maximal degree in co-relation 60083. Up to 7740 conditions per place. [2024-06-14 14:18:52,369 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 480 selfloop transitions, 66 changer transitions 0/554 dead transitions. [2024-06-14 14:18:52,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 554 transitions, 8212 flow [2024-06-14 14:18:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:18:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:18:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:18:52,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 14:18:52,370 INFO L175 Difference]: Start difference. First operand has 449 places, 535 transitions, 7024 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:18:52,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 554 transitions, 8212 flow [2024-06-14 14:19:00,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 554 transitions, 8004 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:19:00,751 INFO L231 Difference]: Finished difference. Result has 450 places, 536 transitions, 6999 flow [2024-06-14 14:19:00,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6820, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6999, PETRI_PLACES=450, PETRI_TRANSITIONS=536} [2024-06-14 14:19:00,751 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 406 predicate places. [2024-06-14 14:19:00,752 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 536 transitions, 6999 flow [2024-06-14 14:19:00,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:00,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:00,752 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, 1] [2024-06-14 14:19:00,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:19:00,752 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:00,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:00,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1223007731, now seen corresponding path program 6 times [2024-06-14 14:19:00,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:00,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453163797] [2024-06-14 14:19:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:00,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:00,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:00,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453163797] [2024-06-14 14:19:00,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453163797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:00,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:00,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:19:00,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613650646] [2024-06-14 14:19:00,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:00,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:19:00,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:19:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:19:00,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:19:00,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 536 transitions, 6999 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:00,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:00,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:19:00,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:03,103 INFO L124 PetriNetUnfolderBase]: 5010/8681 cut-off events. [2024-06-14 14:19:03,104 INFO L125 PetriNetUnfolderBase]: For 1652540/1652540 co-relation queries the response was YES. [2024-06-14 14:19:03,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58641 conditions, 8681 events. 5010/8681 cut-off events. For 1652540/1652540 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 64861 event pairs, 1301 based on Foata normal form. 8/8683 useless extension candidates. Maximal degree in co-relation 58429. Up to 7714 conditions per place. [2024-06-14 14:19:03,250 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 479 selfloop transitions, 67 changer transitions 0/554 dead transitions. [2024-06-14 14:19:03,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 554 transitions, 8147 flow [2024-06-14 14:19:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:19:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:19:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:19:03,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 14:19:03,251 INFO L175 Difference]: Start difference. First operand has 450 places, 536 transitions, 6999 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:19:03,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 554 transitions, 8147 flow [2024-06-14 14:19:14,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 554 transitions, 7980 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 14:19:14,639 INFO L231 Difference]: Finished difference. Result has 452 places, 536 transitions, 6975 flow [2024-06-14 14:19:14,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6832, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6975, PETRI_PLACES=452, PETRI_TRANSITIONS=536} [2024-06-14 14:19:14,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-14 14:19:14,639 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 536 transitions, 6975 flow [2024-06-14 14:19:14,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:14,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:14,639 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, 1] [2024-06-14 14:19:14,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:19:14,640 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:14,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash -296317657, now seen corresponding path program 1 times [2024-06-14 14:19:14,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:14,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844585360] [2024-06-14 14:19:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:14,823 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 14:19:14,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:14,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844585360] [2024-06-14 14:19:14,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844585360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:14,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:14,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:19:14,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336657624] [2024-06-14 14:19:14,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:14,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:19:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:19:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:19:14,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:19:14,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 536 transitions, 6975 flow. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:14,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:14,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:19:14,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:16,885 INFO L124 PetriNetUnfolderBase]: 5031/8720 cut-off events. [2024-06-14 14:19:16,886 INFO L125 PetriNetUnfolderBase]: For 1597082/1597082 co-relation queries the response was YES. [2024-06-14 14:19:16,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58955 conditions, 8720 events. 5031/8720 cut-off events. For 1597082/1597082 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 65204 event pairs, 1304 based on Foata normal form. 1/8715 useless extension candidates. Maximal degree in co-relation 58742. Up to 7603 conditions per place. [2024-06-14 14:19:17,023 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 432 selfloop transitions, 125 changer transitions 0/565 dead transitions. [2024-06-14 14:19:17,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 565 transitions, 8911 flow [2024-06-14 14:19:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:19:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:19:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 14:19:17,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5901162790697675 [2024-06-14 14:19:17,025 INFO L175 Difference]: Start difference. First operand has 452 places, 536 transitions, 6975 flow. Second operand 8 states and 203 transitions. [2024-06-14 14:19:17,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 565 transitions, 8911 flow [2024-06-14 14:19:26,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 565 transitions, 8733 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:19:26,970 INFO L231 Difference]: Finished difference. Result has 455 places, 545 transitions, 7263 flow [2024-06-14 14:19:26,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6797, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7263, PETRI_PLACES=455, PETRI_TRANSITIONS=545} [2024-06-14 14:19:26,971 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-14 14:19:26,971 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 545 transitions, 7263 flow [2024-06-14 14:19:26,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:26,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:26,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:26,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:19:26,971 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:26,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1893008797, now seen corresponding path program 2 times [2024-06-14 14:19:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:26,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490966881] [2024-06-14 14:19:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:26,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:27,155 INFO 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 14:19:27,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:27,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490966881] [2024-06-14 14:19:27,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490966881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:27,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:27,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:19:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180063426] [2024-06-14 14:19:27,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:27,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:19:27,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:19:27,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:19:27,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:19:27,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 545 transitions, 7263 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:27,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:27,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:19:27,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:29,204 INFO L124 PetriNetUnfolderBase]: 5036/8713 cut-off events. [2024-06-14 14:19:29,205 INFO L125 PetriNetUnfolderBase]: For 1615668/1615668 co-relation queries the response was YES. [2024-06-14 14:19:29,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59487 conditions, 8713 events. 5036/8713 cut-off events. For 1615668/1615668 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 65028 event pairs, 1304 based on Foata normal form. 1/8708 useless extension candidates. Maximal degree in co-relation 59271. Up to 7609 conditions per place. [2024-06-14 14:19:29,349 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 421 selfloop transitions, 135 changer transitions 0/564 dead transitions. [2024-06-14 14:19:29,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 564 transitions, 9133 flow [2024-06-14 14:19:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:19:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:19:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:19:29,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-14 14:19:29,350 INFO L175 Difference]: Start difference. First operand has 455 places, 545 transitions, 7263 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:19:29,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 564 transitions, 9133 flow [2024-06-14 14:19:38,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 564 transitions, 8957 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:19:38,340 INFO L231 Difference]: Finished difference. Result has 457 places, 548 transitions, 7416 flow [2024-06-14 14:19:38,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7094, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7416, PETRI_PLACES=457, PETRI_TRANSITIONS=548} [2024-06-14 14:19:38,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-14 14:19:38,341 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 548 transitions, 7416 flow [2024-06-14 14:19:38,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:38,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:38,341 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, 1] [2024-06-14 14:19:38,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:19:38,341 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:38,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:38,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2019537841, now seen corresponding path program 3 times [2024-06-14 14:19:38,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:38,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311001183] [2024-06-14 14:19:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:38,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:38,506 INFO 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 14:19:38,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:38,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311001183] [2024-06-14 14:19:38,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311001183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:38,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:38,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:19:38,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716104279] [2024-06-14 14:19:38,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:38,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:19:38,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:38,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:19:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:19:38,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:19:38,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 548 transitions, 7416 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:38,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:38,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:19:38,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:40,640 INFO L124 PetriNetUnfolderBase]: 5033/8709 cut-off events. [2024-06-14 14:19:40,641 INFO L125 PetriNetUnfolderBase]: For 1602096/1602096 co-relation queries the response was YES. [2024-06-14 14:19:40,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59365 conditions, 8709 events. 5033/8709 cut-off events. For 1602096/1602096 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 65043 event pairs, 1304 based on Foata normal form. 1/8704 useless extension candidates. Maximal degree in co-relation 59149. Up to 7606 conditions per place. [2024-06-14 14:19:40,773 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 429 selfloop transitions, 126 changer transitions 0/563 dead transitions. [2024-06-14 14:19:40,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 563 transitions, 8900 flow [2024-06-14 14:19:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:19:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:19:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:19:40,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-14 14:19:40,774 INFO L175 Difference]: Start difference. First operand has 457 places, 548 transitions, 7416 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:19:40,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 563 transitions, 8900 flow [2024-06-14 14:19:48,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 563 transitions, 8666 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:19:48,993 INFO L231 Difference]: Finished difference. Result has 459 places, 548 transitions, 7451 flow [2024-06-14 14:19:48,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7184, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7451, PETRI_PLACES=459, PETRI_TRANSITIONS=548} [2024-06-14 14:19:48,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-14 14:19:48,994 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 548 transitions, 7451 flow [2024-06-14 14:19:48,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:48,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:48,995 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, 1] [2024-06-14 14:19:48,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:19:48,995 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:48,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:48,995 INFO L85 PathProgramCache]: Analyzing trace with hash 876752167, now seen corresponding path program 4 times [2024-06-14 14:19:48,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:48,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708824963] [2024-06-14 14:19:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:48,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:49,159 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 14:19:49,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:49,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708824963] [2024-06-14 14:19:49,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708824963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:49,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:49,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:19:49,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117169247] [2024-06-14 14:19:49,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:49,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:19:49,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:49,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:19:49,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:19:49,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:19:49,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 548 transitions, 7451 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:49,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:49,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:19:49,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:51,290 INFO L124 PetriNetUnfolderBase]: 5038/8718 cut-off events. [2024-06-14 14:19:51,291 INFO L125 PetriNetUnfolderBase]: For 1602520/1602520 co-relation queries the response was YES. [2024-06-14 14:19:51,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59443 conditions, 8718 events. 5038/8718 cut-off events. For 1602520/1602520 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 65125 event pairs, 1304 based on Foata normal form. 1/8713 useless extension candidates. Maximal degree in co-relation 59227. Up to 7612 conditions per place. [2024-06-14 14:19:51,425 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 432 selfloop transitions, 129 changer transitions 0/569 dead transitions. [2024-06-14 14:19:51,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 569 transitions, 8999 flow [2024-06-14 14:19:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:19:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:19:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:19:51,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-14 14:19:51,426 INFO L175 Difference]: Start difference. First operand has 459 places, 548 transitions, 7451 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:19:51,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 569 transitions, 8999 flow [2024-06-14 14:20:00,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 569 transitions, 8654 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:20:00,647 INFO L231 Difference]: Finished difference. Result has 458 places, 551 transitions, 7423 flow [2024-06-14 14:20:00,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7114, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7423, PETRI_PLACES=458, PETRI_TRANSITIONS=551} [2024-06-14 14:20:00,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-14 14:20:00,647 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 551 transitions, 7423 flow [2024-06-14 14:20:00,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:00,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:00,648 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, 1] [2024-06-14 14:20:00,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:20:00,648 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:00,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash 876959557, now seen corresponding path program 5 times [2024-06-14 14:20:00,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:00,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762206145] [2024-06-14 14:20:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:00,812 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 14:20:00,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:00,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762206145] [2024-06-14 14:20:00,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762206145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:00,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:00,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:20:00,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989518233] [2024-06-14 14:20:00,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:00,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:20:00,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:00,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:20:00,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:20:00,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:20:00,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 551 transitions, 7423 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:00,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:00,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:20:00,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:02,938 INFO L124 PetriNetUnfolderBase]: 5043/8727 cut-off events. [2024-06-14 14:20:02,939 INFO L125 PetriNetUnfolderBase]: For 1602030/1602030 co-relation queries the response was YES. [2024-06-14 14:20:03,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59477 conditions, 8727 events. 5043/8727 cut-off events. For 1602030/1602030 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 65205 event pairs, 1304 based on Foata normal form. 1/8722 useless extension candidates. Maximal degree in co-relation 59261. Up to 7618 conditions per place. [2024-06-14 14:20:03,093 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 430 selfloop transitions, 131 changer transitions 0/569 dead transitions. [2024-06-14 14:20:03,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 569 transitions, 8963 flow [2024-06-14 14:20:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:20:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:20:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:20:03,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-06-14 14:20:03,094 INFO L175 Difference]: Start difference. First operand has 458 places, 551 transitions, 7423 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:20:03,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 569 transitions, 8963 flow [2024-06-14 14:20:12,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 569 transitions, 8696 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:20:12,430 INFO L231 Difference]: Finished difference. Result has 459 places, 554 transitions, 7474 flow [2024-06-14 14:20:12,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7164, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7474, PETRI_PLACES=459, PETRI_TRANSITIONS=554} [2024-06-14 14:20:12,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-14 14:20:12,430 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 554 transitions, 7474 flow [2024-06-14 14:20:12,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:12,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:12,431 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, 1] [2024-06-14 14:20:12,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:20:12,431 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:12,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1133460067, now seen corresponding path program 6 times [2024-06-14 14:20:12,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:12,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298820835] [2024-06-14 14:20:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:12,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:12,617 INFO 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 14:20:12,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:12,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298820835] [2024-06-14 14:20:12,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298820835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:12,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:12,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:20:12,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907801387] [2024-06-14 14:20:12,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:12,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:20:12,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:12,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:20:12,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:20:12,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:20:12,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 554 transitions, 7474 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:12,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:12,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:20:12,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:14,678 INFO L124 PetriNetUnfolderBase]: 5040/8723 cut-off events. [2024-06-14 14:20:14,679 INFO L125 PetriNetUnfolderBase]: For 1587659/1587659 co-relation queries the response was YES. [2024-06-14 14:20:14,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59271 conditions, 8723 events. 5040/8723 cut-off events. For 1587659/1587659 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 65153 event pairs, 1304 based on Foata normal form. 1/8718 useless extension candidates. Maximal degree in co-relation 59055. Up to 7615 conditions per place. [2024-06-14 14:20:14,968 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 420 selfloop transitions, 140 changer transitions 0/568 dead transitions. [2024-06-14 14:20:14,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 568 transitions, 8628 flow [2024-06-14 14:20:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:20:14,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:20:14,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:20:14,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780730897009967 [2024-06-14 14:20:14,969 INFO L175 Difference]: Start difference. First operand has 459 places, 554 transitions, 7474 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:20:14,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 568 transitions, 8628 flow [2024-06-14 14:20:23,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 568 transitions, 8420 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 14:20:23,569 INFO L231 Difference]: Finished difference. Result has 461 places, 554 transitions, 7556 flow [2024-06-14 14:20:23,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7556, PETRI_PLACES=461, PETRI_TRANSITIONS=554} [2024-06-14 14:20:23,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-14 14:20:23,570 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 554 transitions, 7556 flow [2024-06-14 14:20:23,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:23,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:23,570 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, 1] [2024-06-14 14:20:23,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:20:23,570 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:23,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:23,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1100853015, now seen corresponding path program 7 times [2024-06-14 14:20:23,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:23,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982729085] [2024-06-14 14:20:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:23,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:23,789 INFO 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 14:20:23,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:23,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982729085] [2024-06-14 14:20:23,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982729085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:23,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:23,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:20:23,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639010171] [2024-06-14 14:20:23,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:23,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:20:23,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:20:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:20:23,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-14 14:20:23,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 554 transitions, 7556 flow. Second operand has 10 states, 10 states have (on average 16.8) internal successors, (168), 10 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:23,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:23,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-14 14:20:23,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:26,043 INFO L124 PetriNetUnfolderBase]: 5106/8824 cut-off events. [2024-06-14 14:20:26,043 INFO L125 PetriNetUnfolderBase]: For 1780705/1780705 co-relation queries the response was YES. [2024-06-14 14:20:26,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61779 conditions, 8824 events. 5106/8824 cut-off events. For 1780705/1780705 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 66060 event pairs, 1288 based on Foata normal form. 6/8808 useless extension candidates. Maximal degree in co-relation 61563. Up to 7487 conditions per place. Killed by 15