./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_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/safe004_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/safe004_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe004_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 13:51:48,004 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:51:48,115 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:51:48,123 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:51:48,124 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:51:48,157 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:51:48,157 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:51:48,158 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:51:48,159 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:51:48,163 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:51:48,164 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:51:48,164 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:51:48,165 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:51:48,167 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:51:48,167 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:51:48,167 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:51:48,168 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:51:48,168 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:51:48,169 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:51:48,169 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:51:48,170 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:51:48,170 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:51:48,170 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:51:48,171 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:51:48,171 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:51:48,171 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:51:48,171 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:51:48,172 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:51:48,172 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:51:48,173 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:51:48,174 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:51:48,174 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:51:48,174 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:51:48,175 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:51:48,175 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:51:48,175 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:51:48,175 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:51:48,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:51:48,176 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:51:48,176 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:51:48,176 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:51:48,176 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:51:48,177 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:51:48,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:51:48,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:51:48,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:51:48,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:51:48,439 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:51:48,440 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:51:48,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-14 13:51:49,557 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:51:49,774 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:51:49,775 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-14 13:51:49,797 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195da2361/e52c23bfdf1a48b29ace7544ad9c3ed2/FLAGb2424dd10 [2024-06-14 13:51:49,808 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195da2361/e52c23bfdf1a48b29ace7544ad9c3ed2 [2024-06-14 13:51:49,811 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:51:49,811 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:51:49,814 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe004_tso.yml/witness.yml [2024-06-14 13:51:49,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:51:49,938 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:51:49,939 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:51:49,939 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:51:49,944 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:51:49,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:51:49" (1/2) ... [2024-06-14 13:51:49,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6654b705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:49, skipping insertion in model container [2024-06-14 13:51:49,947 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:51:49" (1/2) ... [2024-06-14 13:51:49,949 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f469e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:49, skipping insertion in model container [2024-06-14 13:51:49,950 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:49" (2/2) ... [2024-06-14 13:51:49,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6654b705 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:49, skipping insertion in model container [2024-06-14 13:51:49,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:49" (2/2) ... [2024-06-14 13:51:49,951 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:51:50,000 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:51:50,002 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$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_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 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 13:51:50,002 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$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_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 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 13:51:50,002 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$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_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 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 13:51:50,003 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:51:50,003 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-14 13:51:50,049 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:51:50,405 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:51:50,412 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:51:50,522 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:51:50,575 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:51:50,575 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50 WrapperNode [2024-06-14 13:51:50,575 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:51:50,577 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:51:50,577 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:51:50,577 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:51:50,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,607 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,648 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-14 13:51:50,649 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:51:50,649 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:51:50,649 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:51:50,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:51:50,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,663 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,683 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 13:51:50,683 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,684 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,699 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,700 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,704 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,705 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,708 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:51:50,711 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:51:50,711 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:51:50,712 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:51:50,712 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:51:50,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:51:50,734 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 13:51:50,768 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 13:51:50,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:51:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:51:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:51:50,793 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:51:50,794 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:51:50,794 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:51:50,794 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:51:50,794 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:51:50,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:51:50,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:51:50,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:51:50,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:51:50,796 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 13:51:50,921 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:51:50,923 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:51:51,189 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:51:51,189 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:51:51,292 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:51:51,292 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:51:51,293 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:51:51 BoogieIcfgContainer [2024-06-14 13:51:51,293 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:51:51,300 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:51:51,300 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:51:51,303 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:51:51,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:51:49" (1/4) ... [2024-06-14 13:51:51,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e44cfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:51:51, skipping insertion in model container [2024-06-14 13:51:51,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:49" (2/4) ... [2024-06-14 13:51:51,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e44cfad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:51:51, skipping insertion in model container [2024-06-14 13:51:51,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:50" (3/4) ... [2024-06-14 13:51:51,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e44cfad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:51:51, skipping insertion in model container [2024-06-14 13:51:51,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:51:51" (4/4) ... [2024-06-14 13:51:51,306 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_tso.i [2024-06-14 13:51:51,320 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:51:51,321 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:51:51,321 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:51:51,370 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:51:51,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:51:51,415 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 13:51:51,416 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:51:51,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:51:51,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:51:51,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 13:51:51,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:51:51,433 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;@5237956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:51:51,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:51:51,436 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:51:51,436 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:51:51,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:51:51,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:51,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:51:51,437 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 13:51:51,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:51,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1793314465, now seen corresponding path program 1 times [2024-06-14 13:51:51,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:51,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518226162] [2024-06-14 13:51:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:51,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:52,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:52,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518226162] [2024-06-14 13:51:52,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518226162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:52,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:52,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:51:52,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233687387] [2024-06-14 13:51:52,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:52,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:51:52,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:52,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:51:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:51:52,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-14 13:51:52,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:52,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:52,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-14 13:51:52,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:52,505 INFO L124 PetriNetUnfolderBase]: 606/995 cut-off events. [2024-06-14 13:51:52,505 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 13:51:52,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2013 conditions, 995 events. 606/995 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4997 event pairs, 384 based on Foata normal form. 1/944 useless extension candidates. Maximal degree in co-relation 1998. Up to 941 conditions per place. [2024-06-14 13:51:52,517 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 13:51:52,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-14 13:51:52,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:51:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:51:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-14 13:51:52,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-14 13:51:52,528 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 82 transitions. [2024-06-14 13:51:52,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-14 13:51:52,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:52,534 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 13:51:52,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 13:51:52,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 13:51:52,539 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 13:51:52,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:52,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:52,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:52,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:51:52,540 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 13:51:52,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:52,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1093279874, now seen corresponding path program 1 times [2024-06-14 13:51:52,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:52,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680745143] [2024-06-14 13:51:52,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:52,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:52,831 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 13:51:52,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:52,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680745143] [2024-06-14 13:51:52,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680745143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:52,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:52,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:51:52,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908533493] [2024-06-14 13:51:52,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:52,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:51:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:51:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:51:52,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:52,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:52,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:52,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:52,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:53,086 INFO L124 PetriNetUnfolderBase]: 934/1510 cut-off events. [2024-06-14 13:51:53,087 INFO L125 PetriNetUnfolderBase]: For 300/348 co-relation queries the response was YES. [2024-06-14 13:51:53,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3428 conditions, 1510 events. 934/1510 cut-off events. For 300/348 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7433 event pairs, 530 based on Foata normal form. 3/1483 useless extension candidates. Maximal degree in co-relation 3413. Up to 1399 conditions per place. [2024-06-14 13:51:53,096 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 13:51:53,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 254 flow [2024-06-14 13:51:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:51:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:51:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 13:51:53,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-14 13:51:53,098 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-06-14 13:51:53,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 254 flow [2024-06-14 13:51:53,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:51:53,100 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-14 13:51:53,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-14 13:51:53,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 13:51:53,101 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-14 13:51:53,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:53,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:53,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:53,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:51:53,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:53,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash 468063438, now seen corresponding path program 1 times [2024-06-14 13:51:53,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:53,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881963400] [2024-06-14 13:51:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:53,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:53,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:53,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881963400] [2024-06-14 13:51:53,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881963400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:53,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:53,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:53,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761390561] [2024-06-14 13:51:53,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:53,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:53,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:53,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:53,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 13:51:53,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:53,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:53,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:53,453 INFO L124 PetriNetUnfolderBase]: 972/1588 cut-off events. [2024-06-14 13:51:53,453 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-06-14 13:51:53,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1588 events. 972/1588 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7840 event pairs, 304 based on Foata normal form. 7/1590 useless extension candidates. Maximal degree in co-relation 3986. Up to 1312 conditions per place. [2024-06-14 13:51:53,461 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-14 13:51:53,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 430 flow [2024-06-14 13:51:53,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 13:51:53,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682926829268293 [2024-06-14 13:51:53,464 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 137 transitions. [2024-06-14 13:51:53,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 430 flow [2024-06-14 13:51:53,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 82 transitions, 428 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 13:51:53,466 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 278 flow [2024-06-14 13:51:53,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2024-06-14 13:51:53,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-14 13:51:53,467 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 278 flow [2024-06-14 13:51:53,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 13:51:53,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:53,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:53,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:51:53,484 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 13:51:53,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:53,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1162563891, now seen corresponding path program 1 times [2024-06-14 13:51:53,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:53,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398551940] [2024-06-14 13:51:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:53,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:53,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:53,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398551940] [2024-06-14 13:51:53,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398551940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:53,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:53,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:53,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170171394] [2024-06-14 13:51:53,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:53,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:53,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:53,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:53,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:53,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:53,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:53,955 INFO L124 PetriNetUnfolderBase]: 1054/1742 cut-off events. [2024-06-14 13:51:53,955 INFO L125 PetriNetUnfolderBase]: For 2375/2375 co-relation queries the response was YES. [2024-06-14 13:51:53,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5475 conditions, 1742 events. 1054/1742 cut-off events. For 2375/2375 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8953 event pairs, 197 based on Foata normal form. 26/1763 useless extension candidates. Maximal degree in co-relation 5452. Up to 1290 conditions per place. [2024-06-14 13:51:53,965 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 22 changer transitions 0/92 dead transitions. [2024-06-14 13:51:53,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 582 flow [2024-06-14 13:51:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 13:51:53,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-14 13:51:53,969 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 278 flow. Second operand 6 states and 160 transitions. [2024-06-14 13:51:53,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 582 flow [2024-06-14 13:51:53,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 572 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-14 13:51:53,978 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 339 flow [2024-06-14 13:51:53,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-14 13:51:53,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 13:51:53,980 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 339 flow [2024-06-14 13:51:53,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:53,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:53,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:53,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:51:53,981 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 13:51:53,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1976063819, now seen corresponding path program 1 times [2024-06-14 13:51:53,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:53,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605292584] [2024-06-14 13:51:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:54,252 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 13:51:54,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:54,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605292584] [2024-06-14 13:51:54,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605292584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:54,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:54,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:51:54,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295684416] [2024-06-14 13:51:54,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:54,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:51:54,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:54,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:51:54,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:51:54,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-14 13:51:54,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 339 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 13:51:54,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:54,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-14 13:51:54,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:54,422 INFO L124 PetriNetUnfolderBase]: 801/1436 cut-off events. [2024-06-14 13:51:54,423 INFO L125 PetriNetUnfolderBase]: For 2705/2739 co-relation queries the response was YES. [2024-06-14 13:51:54,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 1436 events. 801/1436 cut-off events. For 2705/2739 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7887 event pairs, 231 based on Foata normal form. 4/1396 useless extension candidates. Maximal degree in co-relation 4794. Up to 1191 conditions per place. [2024-06-14 13:51:54,435 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 48 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-06-14 13:51:54,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 511 flow [2024-06-14 13:51:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:51:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:51:54,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 13:51:54,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 13:51:54,438 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 339 flow. Second operand 4 states and 102 transitions. [2024-06-14 13:51:54,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 511 flow [2024-06-14 13:51:54,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 460 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:54,443 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 354 flow [2024-06-14 13:51:54,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=354, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2024-06-14 13:51:54,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 13:51:54,444 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 354 flow [2024-06-14 13:51:54,444 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 13:51:54,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:54,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:54,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:51:54,445 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 13:51:54,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:54,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1129415895, now seen corresponding path program 1 times [2024-06-14 13:51:54,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:54,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715897757] [2024-06-14 13:51:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:54,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:54,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:54,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715897757] [2024-06-14 13:51:54,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715897757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:54,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:54,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:54,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120213938] [2024-06-14 13:51:54,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:54,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:54,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:54,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:54,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:54,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 354 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:54,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:54,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:54,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:54,914 INFO L124 PetriNetUnfolderBase]: 1050/1744 cut-off events. [2024-06-14 13:51:54,914 INFO L125 PetriNetUnfolderBase]: For 4014/4018 co-relation queries the response was YES. [2024-06-14 13:51:54,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6097 conditions, 1744 events. 1050/1744 cut-off events. For 4014/4018 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9097 event pairs, 307 based on Foata normal form. 7/1746 useless extension candidates. Maximal degree in co-relation 6070. Up to 1463 conditions per place. [2024-06-14 13:51:54,924 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 24 changer transitions 0/86 dead transitions. [2024-06-14 13:51:54,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 641 flow [2024-06-14 13:51:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-14 13:51:54,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-14 13:51:54,926 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 354 flow. Second operand 5 states and 129 transitions. [2024-06-14 13:51:54,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 641 flow [2024-06-14 13:51:54,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 608 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 13:51:54,931 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 436 flow [2024-06-14 13:51:54,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2024-06-14 13:51:54,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-14 13:51:54,934 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 436 flow [2024-06-14 13:51:54,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:54,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:54,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:54,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:51:54,935 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 13:51:54,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:54,935 INFO L85 PathProgramCache]: Analyzing trace with hash 460366480, now seen corresponding path program 1 times [2024-06-14 13:51:54,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:54,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980447689] [2024-06-14 13:51:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:55,140 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 13:51:55,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:55,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980447689] [2024-06-14 13:51:55,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980447689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:55,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:55,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:55,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025774409] [2024-06-14 13:51:55,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:55,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:55,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:55,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:55,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:55,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:55,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 436 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:55,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:55,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:55,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:55,339 INFO L124 PetriNetUnfolderBase]: 1053/1744 cut-off events. [2024-06-14 13:51:55,340 INFO L125 PetriNetUnfolderBase]: For 4867/4867 co-relation queries the response was YES. [2024-06-14 13:51:55,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6525 conditions, 1744 events. 1053/1744 cut-off events. For 4867/4867 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8983 event pairs, 333 based on Foata normal form. 4/1744 useless extension candidates. Maximal degree in co-relation 6496. Up to 1457 conditions per place. [2024-06-14 13:51:55,352 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 60 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-14 13:51:55,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 741 flow [2024-06-14 13:51:55,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 13:51:55,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-14 13:51:55,353 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 436 flow. Second operand 5 states and 131 transitions. [2024-06-14 13:51:55,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 741 flow [2024-06-14 13:51:55,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 708 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 13:51:55,359 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 498 flow [2024-06-14 13:51:55,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-14 13:51:55,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-14 13:51:55,360 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 498 flow [2024-06-14 13:51:55,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:55,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:55,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:55,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:51:55,361 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:55,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash -621774892, now seen corresponding path program 2 times [2024-06-14 13:51:55,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:55,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374295538] [2024-06-14 13:51:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:55,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:55,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:55,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374295538] [2024-06-14 13:51:55,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374295538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:55,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:55,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:55,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054255470] [2024-06-14 13:51:55,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:55,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:55,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:55,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:55,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:55,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:55,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:55,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:55,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:55,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:55,781 INFO L124 PetriNetUnfolderBase]: 1018/1669 cut-off events. [2024-06-14 13:51:55,781 INFO L125 PetriNetUnfolderBase]: For 5980/5984 co-relation queries the response was YES. [2024-06-14 13:51:55,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6407 conditions, 1669 events. 1018/1669 cut-off events. For 5980/5984 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8425 event pairs, 335 based on Foata normal form. 5/1669 useless extension candidates. Maximal degree in co-relation 6376. Up to 1406 conditions per place. [2024-06-14 13:51:55,791 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 26 changer transitions 0/87 dead transitions. [2024-06-14 13:51:55,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 730 flow [2024-06-14 13:51:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 13:51:55,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-14 13:51:55,793 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 498 flow. Second operand 5 states and 126 transitions. [2024-06-14 13:51:55,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 730 flow [2024-06-14 13:51:55,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 694 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:51:55,800 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 524 flow [2024-06-14 13:51:55,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-14 13:51:55,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-14 13:51:55,800 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 524 flow [2024-06-14 13:51:55,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:55,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:55,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:55,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:51:55,801 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 13:51:55,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:55,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1258070056, now seen corresponding path program 1 times [2024-06-14 13:51:55,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:55,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938968076] [2024-06-14 13:51:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:55,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:56,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938968076] [2024-06-14 13:51:56,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938968076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:56,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:56,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261391207] [2024-06-14 13:51:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:56,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:56,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:56,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:56,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:56,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:56,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:56,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:56,265 INFO L124 PetriNetUnfolderBase]: 1085/1784 cut-off events. [2024-06-14 13:51:56,265 INFO L125 PetriNetUnfolderBase]: For 7663/7667 co-relation queries the response was YES. [2024-06-14 13:51:56,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6863 conditions, 1784 events. 1085/1784 cut-off events. For 7663/7667 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9179 event pairs, 299 based on Foata normal form. 25/1804 useless extension candidates. Maximal degree in co-relation 6831. Up to 1391 conditions per place. [2024-06-14 13:51:56,277 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 30 changer transitions 0/98 dead transitions. [2024-06-14 13:51:56,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 826 flow [2024-06-14 13:51:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:51:56,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-14 13:51:56,278 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 524 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:51:56,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 826 flow [2024-06-14 13:51:56,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 764 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:56,285 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 559 flow [2024-06-14 13:51:56,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=559, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-14 13:51:56,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-14 13:51:56,286 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 559 flow [2024-06-14 13:51:56,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:56,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:56,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:56,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:51:56,287 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 13:51:56,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:56,287 INFO L85 PathProgramCache]: Analyzing trace with hash 61996686, now seen corresponding path program 1 times [2024-06-14 13:51:56,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:56,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923789287] [2024-06-14 13:51:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:56,511 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 13:51:56,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:56,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923789287] [2024-06-14 13:51:56,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923789287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:56,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:56,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:56,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409350863] [2024-06-14 13:51:56,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:56,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:56,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:56,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:56,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:56,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:56,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 559 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:56,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:56,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:56,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:56,755 INFO L124 PetriNetUnfolderBase]: 1096/1816 cut-off events. [2024-06-14 13:51:56,755 INFO L125 PetriNetUnfolderBase]: For 8047/8049 co-relation queries the response was YES. [2024-06-14 13:51:56,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7304 conditions, 1816 events. 1096/1816 cut-off events. For 8047/8049 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9459 event pairs, 320 based on Foata normal form. 4/1819 useless extension candidates. Maximal degree in co-relation 7271. Up to 1531 conditions per place. [2024-06-14 13:51:56,767 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 66 selfloop transitions, 28 changer transitions 0/100 dead transitions. [2024-06-14 13:51:56,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 869 flow [2024-06-14 13:51:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:51:56,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:51:56,769 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 559 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:51:56,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 869 flow [2024-06-14 13:51:56,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 794 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:56,779 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 574 flow [2024-06-14 13:51:56,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=574, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-14 13:51:56,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-14 13:51:56,780 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 574 flow [2024-06-14 13:51:56,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:56,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:56,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:56,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:51:56,780 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 13:51:56,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:56,781 INFO L85 PathProgramCache]: Analyzing trace with hash -204673278, now seen corresponding path program 2 times [2024-06-14 13:51:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:56,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869091743] [2024-06-14 13:51:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:56,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:56,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:56,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869091743] [2024-06-14 13:51:56,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869091743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:56,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:56,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:56,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896175285] [2024-06-14 13:51:56,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:56,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:56,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:56,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:56,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:57,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:57,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 574 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:57,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:57,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:57,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:57,177 INFO L124 PetriNetUnfolderBase]: 1091/1803 cut-off events. [2024-06-14 13:51:57,177 INFO L125 PetriNetUnfolderBase]: For 9435/9441 co-relation queries the response was YES. [2024-06-14 13:51:57,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7263 conditions, 1803 events. 1091/1803 cut-off events. For 9435/9441 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9377 event pairs, 350 based on Foata normal form. 8/1809 useless extension candidates. Maximal degree in co-relation 7229. Up to 1526 conditions per place. [2024-06-14 13:51:57,188 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-14 13:51:57,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 796 flow [2024-06-14 13:51:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 13:51:57,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:51:57,190 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 574 flow. Second operand 5 states and 125 transitions. [2024-06-14 13:51:57,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 796 flow [2024-06-14 13:51:57,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 734 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:57,199 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 572 flow [2024-06-14 13:51:57,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=572, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-14 13:51:57,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-14 13:51:57,199 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 572 flow [2024-06-14 13:51:57,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:57,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:57,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:57,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:51:57,200 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 13:51:57,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1743591957, now seen corresponding path program 1 times [2024-06-14 13:51:57,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:57,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476268274] [2024-06-14 13:51:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:57,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:57,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476268274] [2024-06-14 13:51:57,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476268274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:57,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:57,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:57,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202529612] [2024-06-14 13:51:57,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:57,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:57,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:57,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:57,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:57,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:57,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 572 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:57,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:57,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:57,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:57,776 INFO L124 PetriNetUnfolderBase]: 1194/1966 cut-off events. [2024-06-14 13:51:57,777 INFO L125 PetriNetUnfolderBase]: For 11565/11565 co-relation queries the response was YES. [2024-06-14 13:51:57,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8091 conditions, 1966 events. 1194/1966 cut-off events. For 11565/11565 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10355 event pairs, 259 based on Foata normal form. 4/1965 useless extension candidates. Maximal degree in co-relation 8057. Up to 1385 conditions per place. [2024-06-14 13:51:57,790 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 71 selfloop transitions, 33 changer transitions 0/110 dead transitions. [2024-06-14 13:51:57,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 944 flow [2024-06-14 13:51:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:57,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 13:51:57,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 13:51:57,791 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 572 flow. Second operand 6 states and 153 transitions. [2024-06-14 13:51:57,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 944 flow [2024-06-14 13:51:57,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 866 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:51:57,804 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 607 flow [2024-06-14 13:51:57,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=607, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-14 13:51:57,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-14 13:51:57,806 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 607 flow [2024-06-14 13:51:57,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:57,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:57,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:57,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:51:57,807 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 13:51:57,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:57,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2129767445, now seen corresponding path program 2 times [2024-06-14 13:51:57,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:57,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895575903] [2024-06-14 13:51:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:57,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:58,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:58,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895575903] [2024-06-14 13:51:58,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895575903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:58,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:58,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:58,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453530043] [2024-06-14 13:51:58,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:58,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:58,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:58,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:58,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:58,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:58,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 607 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:58,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:58,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:58,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:58,268 INFO L124 PetriNetUnfolderBase]: 1186/1954 cut-off events. [2024-06-14 13:51:58,268 INFO L125 PetriNetUnfolderBase]: For 12988/12988 co-relation queries the response was YES. [2024-06-14 13:51:58,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8287 conditions, 1954 events. 1186/1954 cut-off events. For 12988/12988 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10277 event pairs, 343 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 8253. Up to 1665 conditions per place. [2024-06-14 13:51:58,281 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 31 changer transitions 0/104 dead transitions. [2024-06-14 13:51:58,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 871 flow [2024-06-14 13:51:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:51:58,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:51:58,283 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 607 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:51:58,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 871 flow [2024-06-14 13:51:58,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 825 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-14 13:51:58,305 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 642 flow [2024-06-14 13:51:58,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=642, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-14 13:51:58,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-14 13:51:58,306 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 642 flow [2024-06-14 13:51:58,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:58,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:58,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:58,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:51:58,307 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:58,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:58,308 INFO L85 PathProgramCache]: Analyzing trace with hash -847834086, now seen corresponding path program 1 times [2024-06-14 13:51:58,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:58,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298194249] [2024-06-14 13:51:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:58,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:58,569 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 13:51:58,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:58,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298194249] [2024-06-14 13:51:58,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298194249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:58,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:58,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:58,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121401937] [2024-06-14 13:51:58,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:58,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:58,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:58,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:58,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:58,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 642 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:58,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:58,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:58,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:58,868 INFO L124 PetriNetUnfolderBase]: 1191/1970 cut-off events. [2024-06-14 13:51:58,868 INFO L125 PetriNetUnfolderBase]: For 14252/14252 co-relation queries the response was YES. [2024-06-14 13:51:58,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8578 conditions, 1970 events. 1191/1970 cut-off events. For 14252/14252 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10375 event pairs, 319 based on Foata normal form. 1/1970 useless extension candidates. Maximal degree in co-relation 8542. Up to 1813 conditions per place. [2024-06-14 13:51:58,888 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 85 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2024-06-14 13:51:58,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 106 transitions, 968 flow [2024-06-14 13:51:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 13:51:58,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-14 13:51:58,890 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 642 flow. Second operand 5 states and 118 transitions. [2024-06-14 13:51:58,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 106 transitions, 968 flow [2024-06-14 13:51:58,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 106 transitions, 895 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:58,916 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 681 flow [2024-06-14 13:51:58,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=681, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-14 13:51:58,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-14 13:51:58,918 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 681 flow [2024-06-14 13:51:58,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:58,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:58,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:58,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:51:58,919 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 13:51:58,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:58,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2110953095, now seen corresponding path program 1 times [2024-06-14 13:51:58,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:58,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165403001] [2024-06-14 13:51:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:58,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:59,226 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 13:51:59,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:59,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165403001] [2024-06-14 13:51:59,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165403001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:59,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:59,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:59,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480109077] [2024-06-14 13:51:59,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:59,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:59,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:59,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:59,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:59,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:59,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 681 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:59,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:59,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:59,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:59,530 INFO L124 PetriNetUnfolderBase]: 1183/1943 cut-off events. [2024-06-14 13:51:59,531 INFO L125 PetriNetUnfolderBase]: For 16220/16226 co-relation queries the response was YES. [2024-06-14 13:51:59,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8636 conditions, 1943 events. 1183/1943 cut-off events. For 16220/16226 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10181 event pairs, 337 based on Foata normal form. 6/1944 useless extension candidates. Maximal degree in co-relation 8598. Up to 1660 conditions per place. [2024-06-14 13:51:59,552 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 75 selfloop transitions, 31 changer transitions 0/112 dead transitions. [2024-06-14 13:51:59,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 967 flow [2024-06-14 13:51:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:51:59,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:51:59,554 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 681 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:51:59,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 967 flow [2024-06-14 13:51:59,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 947 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-14 13:51:59,592 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 758 flow [2024-06-14 13:51:59,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=758, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2024-06-14 13:51:59,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-14 13:51:59,594 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 758 flow [2024-06-14 13:51:59,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:59,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:59,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:59,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:51:59,594 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:59,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:59,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1877589729, now seen corresponding path program 2 times [2024-06-14 13:51:59,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:59,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691227016] [2024-06-14 13:51:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:59,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:59,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:59,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691227016] [2024-06-14 13:51:59,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691227016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:59,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:59,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:59,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222101883] [2024-06-14 13:51:59,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:59,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:59,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:59,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:59,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:59,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:59,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 92 transitions, 758 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:59,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:59,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:59,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:00,267 INFO L124 PetriNetUnfolderBase]: 1236/2049 cut-off events. [2024-06-14 13:52:00,268 INFO L125 PetriNetUnfolderBase]: For 19588/19594 co-relation queries the response was YES. [2024-06-14 13:52:00,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9396 conditions, 2049 events. 1236/2049 cut-off events. For 19588/19594 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10933 event pairs, 307 based on Foata normal form. 6/2050 useless extension candidates. Maximal degree in co-relation 9355. Up to 1487 conditions per place. [2024-06-14 13:52:00,286 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 35 changer transitions 0/121 dead transitions. [2024-06-14 13:52:00,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 1146 flow [2024-06-14 13:52:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 13:52:00,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:52:00,288 INFO L175 Difference]: Start difference. First operand has 87 places, 92 transitions, 758 flow. Second operand 6 states and 150 transitions. [2024-06-14 13:52:00,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 1146 flow [2024-06-14 13:52:00,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 121 transitions, 1069 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:00,318 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 796 flow [2024-06-14 13:52:00,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=796, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-14 13:52:00,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-14 13:52:00,320 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 796 flow [2024-06-14 13:52:00,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:00,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:00,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:00,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:52:00,322 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 13:52:00,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:00,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1912117452, now seen corresponding path program 2 times [2024-06-14 13:52:00,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:00,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029920609] [2024-06-14 13:52:00,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:00,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:00,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:00,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029920609] [2024-06-14 13:52:00,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029920609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:00,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:00,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:00,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128979515] [2024-06-14 13:52:00,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:00,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:00,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:00,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:00,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:00,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 796 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:00,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:00,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:00,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:00,938 INFO L124 PetriNetUnfolderBase]: 1238/2062 cut-off events. [2024-06-14 13:52:00,938 INFO L125 PetriNetUnfolderBase]: For 21446/21446 co-relation queries the response was YES. [2024-06-14 13:52:00,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9649 conditions, 2062 events. 1238/2062 cut-off events. For 21446/21446 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11080 event pairs, 341 based on Foata normal form. 2/2063 useless extension candidates. Maximal degree in co-relation 9607. Up to 1893 conditions per place. [2024-06-14 13:52:00,956 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 89 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-14 13:52:00,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 1078 flow [2024-06-14 13:52:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 13:52:00,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 13:52:00,958 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 796 flow. Second operand 4 states and 102 transitions. [2024-06-14 13:52:00,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 1078 flow [2024-06-14 13:52:00,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 1016 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:00,990 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 822 flow [2024-06-14 13:52:00,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=822, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2024-06-14 13:52:00,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-14 13:52:00,991 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 822 flow [2024-06-14 13:52:00,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:00,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:00,992 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 13:52:00,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:52:00,992 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:00,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1160031249, now seen corresponding path program 1 times [2024-06-14 13:52:00,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:00,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929778572] [2024-06-14 13:52:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:00,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:01,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:01,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929778572] [2024-06-14 13:52:01,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929778572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:01,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:01,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:01,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825680508] [2024-06-14 13:52:01,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:01,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:01,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:01,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:01,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:01,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:01,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 822 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:01,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:01,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:01,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:01,666 INFO L124 PetriNetUnfolderBase]: 1279/2130 cut-off events. [2024-06-14 13:52:01,666 INFO L125 PetriNetUnfolderBase]: For 25473/25481 co-relation queries the response was YES. [2024-06-14 13:52:01,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10120 conditions, 2130 events. 1279/2130 cut-off events. For 25473/25481 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11604 event pairs, 286 based on Foata normal form. 15/2142 useless extension candidates. Maximal degree in co-relation 10076. Up to 1066 conditions per place. [2024-06-14 13:52:01,680 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 86 selfloop transitions, 32 changer transitions 0/124 dead transitions. [2024-06-14 13:52:01,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 124 transitions, 1168 flow [2024-06-14 13:52:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:52:01,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:52:01,683 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 822 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:52:01,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 124 transitions, 1168 flow [2024-06-14 13:52:01,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 124 transitions, 1128 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:01,710 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 864 flow [2024-06-14 13:52:01,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=864, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-06-14 13:52:01,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 13:52:01,711 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 864 flow [2024-06-14 13:52:01,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:01,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:01,712 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 13:52:01,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:52:01,712 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 13:52:01,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash 905879701, now seen corresponding path program 2 times [2024-06-14 13:52:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:01,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72193598] [2024-06-14 13:52:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:01,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:01,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:01,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72193598] [2024-06-14 13:52:01,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72193598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:01,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:01,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:01,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209427210] [2024-06-14 13:52:01,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:01,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:01,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:01,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:01,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:01,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:01,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 864 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 13:52:01,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:01,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:01,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:02,258 INFO L124 PetriNetUnfolderBase]: 1259/2099 cut-off events. [2024-06-14 13:52:02,259 INFO L125 PetriNetUnfolderBase]: For 25781/25781 co-relation queries the response was YES. [2024-06-14 13:52:02,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10164 conditions, 2099 events. 1259/2099 cut-off events. For 25781/25781 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11365 event pairs, 270 based on Foata normal form. 12/2108 useless extension candidates. Maximal degree in co-relation 10119. Up to 1555 conditions per place. [2024-06-14 13:52:02,274 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 89 selfloop transitions, 41 changer transitions 0/136 dead transitions. [2024-06-14 13:52:02,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 136 transitions, 1220 flow [2024-06-14 13:52:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 13:52:02,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-14 13:52:02,277 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 864 flow. Second operand 8 states and 195 transitions. [2024-06-14 13:52:02,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 136 transitions, 1220 flow [2024-06-14 13:52:02,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1167 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:02,305 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 899 flow [2024-06-14 13:52:02,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=899, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-06-14 13:52:02,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-14 13:52:02,306 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 899 flow [2024-06-14 13:52:02,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 13:52:02,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:02,307 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 13:52:02,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:52:02,307 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:02,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:02,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1372918710, now seen corresponding path program 1 times [2024-06-14 13:52:02,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:02,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385261437] [2024-06-14 13:52:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:02,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:02,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385261437] [2024-06-14 13:52:02,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385261437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:02,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:02,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:02,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274175329] [2024-06-14 13:52:02,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:02,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:02,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:02,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:02,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:02,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:02,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 899 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:02,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:02,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:02,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:02,813 INFO L124 PetriNetUnfolderBase]: 1298/2172 cut-off events. [2024-06-14 13:52:02,813 INFO L125 PetriNetUnfolderBase]: For 28140/28140 co-relation queries the response was YES. [2024-06-14 13:52:02,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10614 conditions, 2172 events. 1298/2172 cut-off events. For 28140/28140 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11916 event pairs, 357 based on Foata normal form. 3/2170 useless extension candidates. Maximal degree in co-relation 10568. Up to 1766 conditions per place. [2024-06-14 13:52:02,830 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 48 changer transitions 0/146 dead transitions. [2024-06-14 13:52:02,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 146 transitions, 1525 flow [2024-06-14 13:52:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 13:52:02,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-14 13:52:02,832 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 899 flow. Second operand 6 states and 155 transitions. [2024-06-14 13:52:02,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 146 transitions, 1525 flow [2024-06-14 13:52:02,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 146 transitions, 1426 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:02,865 INFO L231 Difference]: Finished difference. Result has 101 places, 119 transitions, 1114 flow [2024-06-14 13:52:02,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1114, PETRI_PLACES=101, PETRI_TRANSITIONS=119} [2024-06-14 13:52:02,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 13:52:02,865 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 119 transitions, 1114 flow [2024-06-14 13:52:02,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:02,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:02,866 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 13:52:02,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:52:02,866 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 13:52:02,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:02,867 INFO L85 PathProgramCache]: Analyzing trace with hash 877340899, now seen corresponding path program 3 times [2024-06-14 13:52:02,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:02,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484109585] [2024-06-14 13:52:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:02,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:03,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:03,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484109585] [2024-06-14 13:52:03,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484109585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:03,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:03,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:03,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686076745] [2024-06-14 13:52:03,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:03,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:03,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:03,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:03,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:03,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 119 transitions, 1114 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:03,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:03,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:03,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:03,603 INFO L124 PetriNetUnfolderBase]: 1400/2370 cut-off events. [2024-06-14 13:52:03,604 INFO L125 PetriNetUnfolderBase]: For 36100/36110 co-relation queries the response was YES. [2024-06-14 13:52:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12134 conditions, 2370 events. 1400/2370 cut-off events. For 36100/36110 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13430 event pairs, 318 based on Foata normal form. 22/2390 useless extension candidates. Maximal degree in co-relation 12085. Up to 1692 conditions per place. [2024-06-14 13:52:03,629 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 116 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-14 13:52:03,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 152 transitions, 1592 flow [2024-06-14 13:52:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 13:52:03,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-14 13:52:03,631 INFO L175 Difference]: Start difference. First operand has 101 places, 119 transitions, 1114 flow. Second operand 6 states and 152 transitions. [2024-06-14 13:52:03,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 152 transitions, 1592 flow [2024-06-14 13:52:03,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 152 transitions, 1554 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:03,685 INFO L231 Difference]: Finished difference. Result has 107 places, 121 transitions, 1170 flow [2024-06-14 13:52:03,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1170, PETRI_PLACES=107, PETRI_TRANSITIONS=121} [2024-06-14 13:52:03,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-14 13:52:03,686 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 121 transitions, 1170 flow [2024-06-14 13:52:03,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:03,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:03,686 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 13:52:03,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:52:03,687 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 13:52:03,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:03,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1551691187, now seen corresponding path program 4 times [2024-06-14 13:52:03,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:03,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26159745] [2024-06-14 13:52:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:03,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:03,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:03,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26159745] [2024-06-14 13:52:03,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26159745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:03,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:03,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:03,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629775777] [2024-06-14 13:52:03,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:03,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:03,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:03,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:03,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:03,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 121 transitions, 1170 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 13:52:03,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:03,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:03,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:04,393 INFO L124 PetriNetUnfolderBase]: 1458/2457 cut-off events. [2024-06-14 13:52:04,394 INFO L125 PetriNetUnfolderBase]: For 40244/40244 co-relation queries the response was YES. [2024-06-14 13:52:04,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12760 conditions, 2457 events. 1458/2457 cut-off events. For 40244/40244 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14011 event pairs, 400 based on Foata normal form. 16/2469 useless extension candidates. Maximal degree in co-relation 12708. Up to 2045 conditions per place. [2024-06-14 13:52:04,413 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 32 changer transitions 0/159 dead transitions. [2024-06-14 13:52:04,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 159 transitions, 1591 flow [2024-06-14 13:52:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 13:52:04,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-14 13:52:04,418 INFO L175 Difference]: Start difference. First operand has 107 places, 121 transitions, 1170 flow. Second operand 8 states and 193 transitions. [2024-06-14 13:52:04,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 159 transitions, 1591 flow [2024-06-14 13:52:04,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 1549 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:04,462 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1216 flow [2024-06-14 13:52:04,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1216, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-14 13:52:04,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-14 13:52:04,463 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1216 flow [2024-06-14 13:52:04,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 13:52:04,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:04,463 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 13:52:04,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:52:04,463 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 13:52:04,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1473306879, now seen corresponding path program 5 times [2024-06-14 13:52:04,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:04,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849028966] [2024-06-14 13:52:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:04,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:04,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:04,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849028966] [2024-06-14 13:52:04,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849028966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:04,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:04,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:04,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683973541] [2024-06-14 13:52:04,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:04,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:04,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:04,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:04,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:04,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:04,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1216 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:04,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:04,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:04,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:04,976 INFO L124 PetriNetUnfolderBase]: 1430/2422 cut-off events. [2024-06-14 13:52:04,976 INFO L125 PetriNetUnfolderBase]: For 40355/40365 co-relation queries the response was YES. [2024-06-14 13:52:04,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12538 conditions, 2422 events. 1430/2422 cut-off events. For 40355/40365 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13829 event pairs, 410 based on Foata normal form. 21/2441 useless extension candidates. Maximal degree in co-relation 12484. Up to 2001 conditions per place. [2024-06-14 13:52:04,999 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 27 changer transitions 0/145 dead transitions. [2024-06-14 13:52:04,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 145 transitions, 1558 flow [2024-06-14 13:52:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:52:05,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:52:05,001 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1216 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:52:05,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 145 transitions, 1558 flow [2024-06-14 13:52:05,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 145 transitions, 1489 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:05,113 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1208 flow [2024-06-14 13:52:05,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1208, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-14 13:52:05,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-14 13:52:05,114 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1208 flow [2024-06-14 13:52:05,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:05,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:05,114 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 13:52:05,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:52:05,114 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 13:52:05,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1546113605, now seen corresponding path program 1 times [2024-06-14 13:52:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:05,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800541299] [2024-06-14 13:52:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:05,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:05,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:05,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800541299] [2024-06-14 13:52:05,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800541299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:05,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:05,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:05,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078190298] [2024-06-14 13:52:05,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:05,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:05,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:05,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:05,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1208 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 13:52:05,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:05,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:05,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:05,645 INFO L124 PetriNetUnfolderBase]: 1471/2501 cut-off events. [2024-06-14 13:52:05,646 INFO L125 PetriNetUnfolderBase]: For 41719/41721 co-relation queries the response was YES. [2024-06-14 13:52:05,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12841 conditions, 2501 events. 1471/2501 cut-off events. For 41719/41721 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14427 event pairs, 310 based on Foata normal form. 14/2514 useless extension candidates. Maximal degree in co-relation 12786. Up to 1783 conditions per place. [2024-06-14 13:52:05,670 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 117 selfloop transitions, 33 changer transitions 0/156 dead transitions. [2024-06-14 13:52:05,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 156 transitions, 1615 flow [2024-06-14 13:52:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 13:52:05,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 13:52:05,673 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1208 flow. Second operand 7 states and 170 transitions. [2024-06-14 13:52:05,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 156 transitions, 1615 flow [2024-06-14 13:52:05,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 156 transitions, 1547 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:05,730 INFO L231 Difference]: Finished difference. Result has 115 places, 123 transitions, 1229 flow [2024-06-14 13:52:05,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1229, PETRI_PLACES=115, PETRI_TRANSITIONS=123} [2024-06-14 13:52:05,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-14 13:52:05,730 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 123 transitions, 1229 flow [2024-06-14 13:52:05,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 13:52:05,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:05,731 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 13:52:05,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:52:05,731 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:05,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:05,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1373217612, now seen corresponding path program 1 times [2024-06-14 13:52:05,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:05,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587467274] [2024-06-14 13:52:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:05,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:05,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:05,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587467274] [2024-06-14 13:52:05,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587467274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:05,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:05,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:05,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509886492] [2024-06-14 13:52:05,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:05,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:05,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:05,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:05,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 1229 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:05,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:05,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:05,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:06,242 INFO L124 PetriNetUnfolderBase]: 1476/2509 cut-off events. [2024-06-14 13:52:06,242 INFO L125 PetriNetUnfolderBase]: For 41928/41928 co-relation queries the response was YES. [2024-06-14 13:52:06,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13046 conditions, 2509 events. 1476/2509 cut-off events. For 41928/41928 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14485 event pairs, 384 based on Foata normal form. 1/2509 useless extension candidates. Maximal degree in co-relation 12990. Up to 2282 conditions per place. [2024-06-14 13:52:06,260 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 115 selfloop transitions, 25 changer transitions 0/146 dead transitions. [2024-06-14 13:52:06,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 146 transitions, 1687 flow [2024-06-14 13:52:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 13:52:06,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 13:52:06,261 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 1229 flow. Second operand 6 states and 137 transitions. [2024-06-14 13:52:06,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 146 transitions, 1687 flow [2024-06-14 13:52:06,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 146 transitions, 1613 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:06,311 INFO L231 Difference]: Finished difference. Result has 116 places, 129 transitions, 1305 flow [2024-06-14 13:52:06,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1305, PETRI_PLACES=116, PETRI_TRANSITIONS=129} [2024-06-14 13:52:06,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-14 13:52:06,311 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 129 transitions, 1305 flow [2024-06-14 13:52:06,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:06,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:06,312 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 13:52:06,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:52:06,312 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:06,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:06,312 INFO L85 PathProgramCache]: Analyzing trace with hash -513052236, now seen corresponding path program 2 times [2024-06-14 13:52:06,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:06,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252364566] [2024-06-14 13:52:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:06,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:06,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:06,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252364566] [2024-06-14 13:52:06,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252364566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:06,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:06,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:06,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203472273] [2024-06-14 13:52:06,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:06,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:06,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:06,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:06,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:06,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:06,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 129 transitions, 1305 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:06,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:06,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:06,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:06,799 INFO L124 PetriNetUnfolderBase]: 1519/2568 cut-off events. [2024-06-14 13:52:06,799 INFO L125 PetriNetUnfolderBase]: For 46294/46294 co-relation queries the response was YES. [2024-06-14 13:52:06,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13508 conditions, 2568 events. 1519/2568 cut-off events. For 46294/46294 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14895 event pairs, 407 based on Foata normal form. 3/2566 useless extension candidates. Maximal degree in co-relation 13451. Up to 2106 conditions per place. [2024-06-14 13:52:06,820 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 101 selfloop transitions, 53 changer transitions 0/160 dead transitions. [2024-06-14 13:52:06,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 160 transitions, 1939 flow [2024-06-14 13:52:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 13:52:06,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 13:52:06,822 INFO L175 Difference]: Start difference. First operand has 116 places, 129 transitions, 1305 flow. Second operand 6 states and 149 transitions. [2024-06-14 13:52:06,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 160 transitions, 1939 flow [2024-06-14 13:52:06,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 160 transitions, 1889 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:06,883 INFO L231 Difference]: Finished difference. Result has 121 places, 139 transitions, 1492 flow [2024-06-14 13:52:06,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1492, PETRI_PLACES=121, PETRI_TRANSITIONS=139} [2024-06-14 13:52:06,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-14 13:52:06,884 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 139 transitions, 1492 flow [2024-06-14 13:52:06,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:06,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:06,885 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 13:52:06,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:52:06,885 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 13:52:06,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:06,886 INFO L85 PathProgramCache]: Analyzing trace with hash 565118045, now seen corresponding path program 2 times [2024-06-14 13:52:06,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:06,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597355900] [2024-06-14 13:52:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:06,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:07,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:07,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597355900] [2024-06-14 13:52:07,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597355900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:07,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:07,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:07,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252762139] [2024-06-14 13:52:07,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:07,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:07,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:07,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:07,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:07,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:07,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 139 transitions, 1492 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:07,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:07,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:07,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:07,464 INFO L124 PetriNetUnfolderBase]: 1499/2536 cut-off events. [2024-06-14 13:52:07,465 INFO L125 PetriNetUnfolderBase]: For 49030/49030 co-relation queries the response was YES. [2024-06-14 13:52:07,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13551 conditions, 2536 events. 1499/2536 cut-off events. For 49030/49030 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14576 event pairs, 274 based on Foata normal form. 12/2543 useless extension candidates. Maximal degree in co-relation 13491. Up to 1931 conditions per place. [2024-06-14 13:52:07,484 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 35 changer transitions 0/168 dead transitions. [2024-06-14 13:52:07,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1898 flow [2024-06-14 13:52:07,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 13:52:07,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-14 13:52:07,485 INFO L175 Difference]: Start difference. First operand has 121 places, 139 transitions, 1492 flow. Second operand 6 states and 152 transitions. [2024-06-14 13:52:07,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1898 flow [2024-06-14 13:52:07,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 168 transitions, 1807 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:07,549 INFO L231 Difference]: Finished difference. Result has 125 places, 139 transitions, 1477 flow [2024-06-14 13:52:07,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1477, PETRI_PLACES=125, PETRI_TRANSITIONS=139} [2024-06-14 13:52:07,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 13:52:07,550 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 139 transitions, 1477 flow [2024-06-14 13:52:07,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:07,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:07,551 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 13:52:07,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:52:07,551 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 13:52:07,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:07,551 INFO L85 PathProgramCache]: Analyzing trace with hash 830815325, now seen corresponding path program 3 times [2024-06-14 13:52:07,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:07,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156039111] [2024-06-14 13:52:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:07,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:07,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:07,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156039111] [2024-06-14 13:52:07,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156039111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:07,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:07,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:07,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794970104] [2024-06-14 13:52:07,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:07,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:07,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:07,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:07,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:07,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 1477 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:07,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:07,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:07,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:08,082 INFO L124 PetriNetUnfolderBase]: 1479/2514 cut-off events. [2024-06-14 13:52:08,082 INFO L125 PetriNetUnfolderBase]: For 49253/49261 co-relation queries the response was YES. [2024-06-14 13:52:08,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13213 conditions, 2514 events. 1479/2514 cut-off events. For 49253/49261 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14581 event pairs, 254 based on Foata normal form. 15/2526 useless extension candidates. Maximal degree in co-relation 13152. Up to 1219 conditions per place. [2024-06-14 13:52:08,102 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 120 selfloop transitions, 36 changer transitions 0/162 dead transitions. [2024-06-14 13:52:08,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 162 transitions, 1811 flow [2024-06-14 13:52:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 13:52:08,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 13:52:08,103 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 1477 flow. Second operand 6 states and 142 transitions. [2024-06-14 13:52:08,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 162 transitions, 1811 flow [2024-06-14 13:52:08,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 162 transitions, 1710 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:08,174 INFO L231 Difference]: Finished difference. Result has 125 places, 138 transitions, 1406 flow [2024-06-14 13:52:08,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1406, PETRI_PLACES=125, PETRI_TRANSITIONS=138} [2024-06-14 13:52:08,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 13:52:08,174 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 138 transitions, 1406 flow [2024-06-14 13:52:08,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:08,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:08,175 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 13:52:08,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:52:08,175 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:08,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:08,176 INFO L85 PathProgramCache]: Analyzing trace with hash -853900106, now seen corresponding path program 2 times [2024-06-14 13:52:08,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:08,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337761451] [2024-06-14 13:52:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:08,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:08,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:08,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337761451] [2024-06-14 13:52:08,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337761451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:08,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:08,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:08,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620796881] [2024-06-14 13:52:08,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:08,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:08,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:08,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:08,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:08,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:08,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 138 transitions, 1406 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:08,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:08,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:08,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:08,689 INFO L124 PetriNetUnfolderBase]: 1476/2509 cut-off events. [2024-06-14 13:52:08,689 INFO L125 PetriNetUnfolderBase]: For 43889/43889 co-relation queries the response was YES. [2024-06-14 13:52:08,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13056 conditions, 2509 events. 1476/2509 cut-off events. For 43889/43889 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14515 event pairs, 358 based on Foata normal form. 1/2509 useless extension candidates. Maximal degree in co-relation 12994. Up to 2281 conditions per place. [2024-06-14 13:52:08,707 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 127 selfloop transitions, 20 changer transitions 0/153 dead transitions. [2024-06-14 13:52:08,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 153 transitions, 1738 flow [2024-06-14 13:52:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 13:52:08,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-14 13:52:08,708 INFO L175 Difference]: Start difference. First operand has 125 places, 138 transitions, 1406 flow. Second operand 5 states and 118 transitions. [2024-06-14 13:52:08,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 153 transitions, 1738 flow [2024-06-14 13:52:08,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 153 transitions, 1568 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:08,760 INFO L231 Difference]: Finished difference. Result has 123 places, 138 transitions, 1282 flow [2024-06-14 13:52:08,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1282, PETRI_PLACES=123, PETRI_TRANSITIONS=138} [2024-06-14 13:52:08,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-14 13:52:08,761 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 138 transitions, 1282 flow [2024-06-14 13:52:08,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:08,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:08,761 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 13:52:08,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:52:08,761 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:08,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash 556194804, now seen corresponding path program 3 times [2024-06-14 13:52:08,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:08,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31123383] [2024-06-14 13:52:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:08,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:08,950 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 13:52:08,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:08,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31123383] [2024-06-14 13:52:08,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31123383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:08,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:08,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:08,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063472512] [2024-06-14 13:52:08,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:08,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:08,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:09,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:09,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 138 transitions, 1282 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:09,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:09,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:09,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:09,359 INFO L124 PetriNetUnfolderBase]: 1578/2677 cut-off events. [2024-06-14 13:52:09,359 INFO L125 PetriNetUnfolderBase]: For 50301/50303 co-relation queries the response was YES. [2024-06-14 13:52:09,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13502 conditions, 2677 events. 1578/2677 cut-off events. For 50301/50303 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15710 event pairs, 362 based on Foata normal form. 8/2684 useless extension candidates. Maximal degree in co-relation 13441. Up to 2191 conditions per place. [2024-06-14 13:52:09,381 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 68 changer transitions 0/191 dead transitions. [2024-06-14 13:52:09,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 191 transitions, 2091 flow [2024-06-14 13:52:09,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:09,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 13:52:09,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-14 13:52:09,383 INFO L175 Difference]: Start difference. First operand has 123 places, 138 transitions, 1282 flow. Second operand 6 states and 158 transitions. [2024-06-14 13:52:09,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 191 transitions, 2091 flow [2024-06-14 13:52:09,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 191 transitions, 2025 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:09,457 INFO L231 Difference]: Finished difference. Result has 127 places, 162 transitions, 1705 flow [2024-06-14 13:52:09,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1705, PETRI_PLACES=127, PETRI_TRANSITIONS=162} [2024-06-14 13:52:09,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-14 13:52:09,458 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 162 transitions, 1705 flow [2024-06-14 13:52:09,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:09,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:09,458 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 13:52:09,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:52:09,458 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:09,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:09,459 INFO L85 PathProgramCache]: Analyzing trace with hash 26943536, now seen corresponding path program 1 times [2024-06-14 13:52:09,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:09,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036504962] [2024-06-14 13:52:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:09,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:09,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:09,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036504962] [2024-06-14 13:52:09,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036504962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:09,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:09,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:09,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170242901] [2024-06-14 13:52:09,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:09,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:09,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:09,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:09,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 162 transitions, 1705 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:09,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:09,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:09,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:10,153 INFO L124 PetriNetUnfolderBase]: 1601/2702 cut-off events. [2024-06-14 13:52:10,154 INFO L125 PetriNetUnfolderBase]: For 56763/56771 co-relation queries the response was YES. [2024-06-14 13:52:10,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14943 conditions, 2702 events. 1601/2702 cut-off events. For 56763/56771 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 15837 event pairs, 395 based on Foata normal form. 6/2703 useless extension candidates. Maximal degree in co-relation 14879. Up to 2191 conditions per place. [2024-06-14 13:52:10,186 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 111 selfloop transitions, 77 changer transitions 0/194 dead transitions. [2024-06-14 13:52:10,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 194 transitions, 2447 flow [2024-06-14 13:52:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 13:52:10,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-14 13:52:10,187 INFO L175 Difference]: Start difference. First operand has 127 places, 162 transitions, 1705 flow. Second operand 6 states and 148 transitions. [2024-06-14 13:52:10,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 194 transitions, 2447 flow [2024-06-14 13:52:10,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 194 transitions, 2397 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:10,353 INFO L231 Difference]: Finished difference. Result has 133 places, 175 transitions, 2001 flow [2024-06-14 13:52:10,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2001, PETRI_PLACES=133, PETRI_TRANSITIONS=175} [2024-06-14 13:52:10,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-14 13:52:10,354 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 175 transitions, 2001 flow [2024-06-14 13:52:10,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:10,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:10,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:10,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:52:10,355 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:10,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:10,355 INFO L85 PathProgramCache]: Analyzing trace with hash 484360834, now seen corresponding path program 2 times [2024-06-14 13:52:10,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:10,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974890174] [2024-06-14 13:52:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:10,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:10,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:10,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974890174] [2024-06-14 13:52:10,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974890174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:10,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:10,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837719203] [2024-06-14 13:52:10,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:10,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:10,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:10,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:10,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:10,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 2001 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:10,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:10,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:10,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:11,232 INFO L124 PetriNetUnfolderBase]: 1667/2819 cut-off events. [2024-06-14 13:52:11,232 INFO L125 PetriNetUnfolderBase]: For 63158/63158 co-relation queries the response was YES. [2024-06-14 13:52:11,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16434 conditions, 2819 events. 1667/2819 cut-off events. For 63158/63158 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16649 event pairs, 359 based on Foata normal form. 4/2822 useless extension candidates. Maximal degree in co-relation 16367. Up to 2518 conditions per place. [2024-06-14 13:52:11,267 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-06-14 13:52:11,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 212 transitions, 2840 flow [2024-06-14 13:52:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 13:52:11,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 13:52:11,269 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 2001 flow. Second operand 7 states and 155 transitions. [2024-06-14 13:52:11,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 212 transitions, 2840 flow [2024-06-14 13:52:11,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 212 transitions, 2744 flow, removed 48 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:11,413 INFO L231 Difference]: Finished difference. Result has 141 places, 196 transitions, 2360 flow [2024-06-14 13:52:11,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2360, PETRI_PLACES=141, PETRI_TRANSITIONS=196} [2024-06-14 13:52:11,414 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-14 13:52:11,415 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 196 transitions, 2360 flow [2024-06-14 13:52:11,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:11,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:11,416 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 13:52:11,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:52:11,416 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 13:52:11,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash 226803790, now seen corresponding path program 3 times [2024-06-14 13:52:11,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:11,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263080211] [2024-06-14 13:52:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:11,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:11,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:11,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263080211] [2024-06-14 13:52:11,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263080211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:11,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:11,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:11,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996344035] [2024-06-14 13:52:11,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:11,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:11,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:11,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:11,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:11,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:11,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 196 transitions, 2360 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:11,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:11,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:11,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:12,048 INFO L124 PetriNetUnfolderBase]: 1665/2825 cut-off events. [2024-06-14 13:52:12,049 INFO L125 PetriNetUnfolderBase]: For 66019/66019 co-relation queries the response was YES. [2024-06-14 13:52:12,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16557 conditions, 2825 events. 1665/2825 cut-off events. For 66019/66019 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16710 event pairs, 354 based on Foata normal form. 6/2830 useless extension candidates. Maximal degree in co-relation 16486. Up to 2266 conditions per place. [2024-06-14 13:52:12,073 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 124 selfloop transitions, 99 changer transitions 0/229 dead transitions. [2024-06-14 13:52:12,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 229 transitions, 3077 flow [2024-06-14 13:52:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:52:12,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 13:52:12,075 INFO L175 Difference]: Start difference. First operand has 141 places, 196 transitions, 2360 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:52:12,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 229 transitions, 3077 flow [2024-06-14 13:52:12,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 229 transitions, 2947 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:12,188 INFO L231 Difference]: Finished difference. Result has 145 places, 201 transitions, 2545 flow [2024-06-14 13:52:12,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2545, PETRI_PLACES=145, PETRI_TRANSITIONS=201} [2024-06-14 13:52:12,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-14 13:52:12,189 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 201 transitions, 2545 flow [2024-06-14 13:52:12,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:12,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:12,189 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 13:52:12,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:52:12,190 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 13:52:12,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:12,190 INFO L85 PathProgramCache]: Analyzing trace with hash 199344424, now seen corresponding path program 1 times [2024-06-14 13:52:12,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:12,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838259488] [2024-06-14 13:52:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:12,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:12,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:12,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838259488] [2024-06-14 13:52:12,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838259488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:12,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:12,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:12,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417603377] [2024-06-14 13:52:12,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:12,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:12,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:12,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:12,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:12,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 201 transitions, 2545 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:12,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:12,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:12,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:12,735 INFO L124 PetriNetUnfolderBase]: 1660/2801 cut-off events. [2024-06-14 13:52:12,735 INFO L125 PetriNetUnfolderBase]: For 67797/67797 co-relation queries the response was YES. [2024-06-14 13:52:12,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16906 conditions, 2801 events. 1660/2801 cut-off events. For 67797/67797 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 16486 event pairs, 355 based on Foata normal form. 2/2802 useless extension candidates. Maximal degree in co-relation 16834. Up to 2557 conditions per place. [2024-06-14 13:52:12,758 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 196 selfloop transitions, 10 changer transitions 0/212 dead transitions. [2024-06-14 13:52:12,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 212 transitions, 3009 flow [2024-06-14 13:52:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-14 13:52:12,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:52:12,760 INFO L175 Difference]: Start difference. First operand has 145 places, 201 transitions, 2545 flow. Second operand 4 states and 93 transitions. [2024-06-14 13:52:12,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 212 transitions, 3009 flow [2024-06-14 13:52:12,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 212 transitions, 2831 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:12,894 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 2426 flow [2024-06-14 13:52:12,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2426, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2024-06-14 13:52:12,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-14 13:52:12,895 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 2426 flow [2024-06-14 13:52:12,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:12,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:12,895 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 13:52:12,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:52:12,895 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 13:52:12,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:12,896 INFO L85 PathProgramCache]: Analyzing trace with hash -389191924, now seen corresponding path program 1 times [2024-06-14 13:52:12,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:12,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681234651] [2024-06-14 13:52:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:12,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:13,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:13,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681234651] [2024-06-14 13:52:13,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681234651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:13,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:13,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:13,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140493793] [2024-06-14 13:52:13,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:13,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:13,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:13,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:13,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:13,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:13,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 2426 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:13,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:13,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:13,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:13,456 INFO L124 PetriNetUnfolderBase]: 1699/2861 cut-off events. [2024-06-14 13:52:13,456 INFO L125 PetriNetUnfolderBase]: For 74314/74314 co-relation queries the response was YES. [2024-06-14 13:52:13,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17139 conditions, 2861 events. 1699/2861 cut-off events. For 74314/74314 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16929 event pairs, 389 based on Foata normal form. 3/2859 useless extension candidates. Maximal degree in co-relation 17066. Up to 2080 conditions per place. [2024-06-14 13:52:13,479 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 119 selfloop transitions, 124 changer transitions 0/249 dead transitions. [2024-06-14 13:52:13,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 249 transitions, 3444 flow [2024-06-14 13:52:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:13,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:52:13,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 13:52:13,481 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 2426 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:52:13,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 249 transitions, 3444 flow [2024-06-14 13:52:13,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 249 transitions, 3397 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:13,610 INFO L231 Difference]: Finished difference. Result has 152 places, 222 transitions, 3017 flow [2024-06-14 13:52:13,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3017, PETRI_PLACES=152, PETRI_TRANSITIONS=222} [2024-06-14 13:52:13,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-14 13:52:13,611 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 222 transitions, 3017 flow [2024-06-14 13:52:13,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:13,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:13,611 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 13:52:13,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:52:13,612 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 13:52:13,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1269540601, now seen corresponding path program 1 times [2024-06-14 13:52:13,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:13,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929143254] [2024-06-14 13:52:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:13,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:13,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:13,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929143254] [2024-06-14 13:52:13,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929143254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:13,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:13,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:13,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972073032] [2024-06-14 13:52:13,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:13,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:13,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:13,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:13,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:13,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:13,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 222 transitions, 3017 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:13,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:13,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:13,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:14,189 INFO L124 PetriNetUnfolderBase]: 1725/2893 cut-off events. [2024-06-14 13:52:14,189 INFO L125 PetriNetUnfolderBase]: For 83053/83053 co-relation queries the response was YES. [2024-06-14 13:52:14,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18977 conditions, 2893 events. 1725/2893 cut-off events. For 83053/83053 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17070 event pairs, 386 based on Foata normal form. 2/2890 useless extension candidates. Maximal degree in co-relation 18901. Up to 2320 conditions per place. [2024-06-14 13:52:14,213 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 157 selfloop transitions, 91 changer transitions 0/254 dead transitions. [2024-06-14 13:52:14,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 254 transitions, 3972 flow [2024-06-14 13:52:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 13:52:14,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 13:52:14,215 INFO L175 Difference]: Start difference. First operand has 152 places, 222 transitions, 3017 flow. Second operand 6 states and 149 transitions. [2024-06-14 13:52:14,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 254 transitions, 3972 flow [2024-06-14 13:52:14,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 254 transitions, 3888 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:14,373 INFO L231 Difference]: Finished difference. Result has 158 places, 232 transitions, 3346 flow [2024-06-14 13:52:14,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3346, PETRI_PLACES=158, PETRI_TRANSITIONS=232} [2024-06-14 13:52:14,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 13:52:14,374 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 232 transitions, 3346 flow [2024-06-14 13:52:14,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:14,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:14,375 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 13:52:14,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:52:14,375 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 13:52:14,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:14,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1275254521, now seen corresponding path program 2 times [2024-06-14 13:52:14,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:14,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468060329] [2024-06-14 13:52:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:14,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:14,548 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 13:52:14,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:14,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468060329] [2024-06-14 13:52:14,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468060329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:14,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:14,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758738316] [2024-06-14 13:52:14,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:14,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:14,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:14,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:14,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:14,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 232 transitions, 3346 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:14,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:14,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:14,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:14,926 INFO L124 PetriNetUnfolderBase]: 1719/2884 cut-off events. [2024-06-14 13:52:14,927 INFO L125 PetriNetUnfolderBase]: For 84745/84745 co-relation queries the response was YES. [2024-06-14 13:52:14,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18838 conditions, 2884 events. 1719/2884 cut-off events. For 84745/84745 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17001 event pairs, 386 based on Foata normal form. 2/2881 useless extension candidates. Maximal degree in co-relation 18758. Up to 2317 conditions per place. [2024-06-14 13:52:14,953 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 87 changer transitions 0/251 dead transitions. [2024-06-14 13:52:14,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 251 transitions, 4092 flow [2024-06-14 13:52:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:52:14,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:52:14,954 INFO L175 Difference]: Start difference. First operand has 158 places, 232 transitions, 3346 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:52:14,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 251 transitions, 4092 flow [2024-06-14 13:52:15,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 251 transitions, 3965 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:15,093 INFO L231 Difference]: Finished difference. Result has 162 places, 232 transitions, 3402 flow [2024-06-14 13:52:15,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3402, PETRI_PLACES=162, PETRI_TRANSITIONS=232} [2024-06-14 13:52:15,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-14 13:52:15,094 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 232 transitions, 3402 flow [2024-06-14 13:52:15,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:15,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:15,094 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 13:52:15,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:52:15,094 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 13:52:15,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:15,095 INFO L85 PathProgramCache]: Analyzing trace with hash -379926334, now seen corresponding path program 2 times [2024-06-14 13:52:15,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:15,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472652034] [2024-06-14 13:52:15,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:15,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:15,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:15,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472652034] [2024-06-14 13:52:15,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472652034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:15,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:15,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:15,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131326622] [2024-06-14 13:52:15,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:15,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:15,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:15,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:15,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:15,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 232 transitions, 3402 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:15,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:15,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:15,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:15,692 INFO L124 PetriNetUnfolderBase]: 1786/2996 cut-off events. [2024-06-14 13:52:15,693 INFO L125 PetriNetUnfolderBase]: For 94612/94612 co-relation queries the response was YES. [2024-06-14 13:52:15,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19894 conditions, 2996 events. 1786/2996 cut-off events. For 94612/94612 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 17814 event pairs, 392 based on Foata normal form. 3/2994 useless extension candidates. Maximal degree in co-relation 19813. Up to 2136 conditions per place. [2024-06-14 13:52:15,721 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 134 selfloop transitions, 129 changer transitions 0/269 dead transitions. [2024-06-14 13:52:15,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 269 transitions, 4516 flow [2024-06-14 13:52:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:15,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:52:15,723 INFO L175 Difference]: Start difference. First operand has 162 places, 232 transitions, 3402 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:15,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 269 transitions, 4516 flow [2024-06-14 13:52:15,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 269 transitions, 4356 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:15,977 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 3740 flow [2024-06-14 13:52:15,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3242, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3740, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2024-06-14 13:52:15,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-14 13:52:15,978 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 3740 flow [2024-06-14 13:52:15,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:15,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:15,978 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 13:52:15,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:52:15,979 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 13:52:15,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:15,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1275250894, now seen corresponding path program 3 times [2024-06-14 13:52:15,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:15,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605848441] [2024-06-14 13:52:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:15,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:16,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:16,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605848441] [2024-06-14 13:52:16,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605848441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:16,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:16,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:16,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499746489] [2024-06-14 13:52:16,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:16,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:16,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:16,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:16,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:16,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:16,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 3740 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:16,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:16,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:16,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:16,602 INFO L124 PetriNetUnfolderBase]: 1781/2992 cut-off events. [2024-06-14 13:52:16,602 INFO L125 PetriNetUnfolderBase]: For 98313/98313 co-relation queries the response was YES. [2024-06-14 13:52:16,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20175 conditions, 2992 events. 1781/2992 cut-off events. For 98313/98313 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17823 event pairs, 393 based on Foata normal form. 3/2990 useless extension candidates. Maximal degree in co-relation 20092. Up to 2134 conditions per place. [2024-06-14 13:52:16,727 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 132 selfloop transitions, 130 changer transitions 0/268 dead transitions. [2024-06-14 13:52:16,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 4581 flow [2024-06-14 13:52:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:16,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:52:16,729 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 3740 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:16,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 4581 flow [2024-06-14 13:52:16,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 268 transitions, 4325 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:16,916 INFO L231 Difference]: Finished difference. Result has 171 places, 247 transitions, 3775 flow [2024-06-14 13:52:16,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3775, PETRI_PLACES=171, PETRI_TRANSITIONS=247} [2024-06-14 13:52:16,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-14 13:52:16,917 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 247 transitions, 3775 flow [2024-06-14 13:52:16,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:16,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:16,917 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 13:52:16,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:52:16,917 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 13:52:16,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:16,918 INFO L85 PathProgramCache]: Analyzing trace with hash 827533781, now seen corresponding path program 3 times [2024-06-14 13:52:16,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:16,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66034819] [2024-06-14 13:52:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:16,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:17,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:17,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66034819] [2024-06-14 13:52:17,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66034819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:17,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:17,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:17,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187074279] [2024-06-14 13:52:17,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:17,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:17,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:17,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:17,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:17,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 247 transitions, 3775 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:17,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:17,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:17,502 INFO L124 PetriNetUnfolderBase]: 1767/2966 cut-off events. [2024-06-14 13:52:17,502 INFO L125 PetriNetUnfolderBase]: For 102161/102169 co-relation queries the response was YES. [2024-06-14 13:52:17,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19941 conditions, 2966 events. 1767/2966 cut-off events. For 102161/102169 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 17632 event pairs, 392 based on Foata normal form. 5/2966 useless extension candidates. Maximal degree in co-relation 19857. Up to 2390 conditions per place. [2024-06-14 13:52:17,529 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 93 changer transitions 0/266 dead transitions. [2024-06-14 13:52:17,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 266 transitions, 4569 flow [2024-06-14 13:52:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:52:17,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 13:52:17,530 INFO L175 Difference]: Start difference. First operand has 171 places, 247 transitions, 3775 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:52:17,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 266 transitions, 4569 flow [2024-06-14 13:52:17,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 266 transitions, 4296 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:17,750 INFO L231 Difference]: Finished difference. Result has 173 places, 247 transitions, 3695 flow [2024-06-14 13:52:17,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3695, PETRI_PLACES=173, PETRI_TRANSITIONS=247} [2024-06-14 13:52:17,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-14 13:52:17,751 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 247 transitions, 3695 flow [2024-06-14 13:52:17,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:17,751 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 13:52:17,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:52:17,751 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:17,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2130276901, now seen corresponding path program 4 times [2024-06-14 13:52:17,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:17,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225391284] [2024-06-14 13:52:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:17,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:17,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:17,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225391284] [2024-06-14 13:52:17,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225391284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:17,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:17,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:17,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493461252] [2024-06-14 13:52:17,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:17,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:17,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:17,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:17,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:17,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:17,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 247 transitions, 3695 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:17,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:17,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:18,374 INFO L124 PetriNetUnfolderBase]: 1751/2950 cut-off events. [2024-06-14 13:52:18,374 INFO L125 PetriNetUnfolderBase]: For 100259/100259 co-relation queries the response was YES. [2024-06-14 13:52:18,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19486 conditions, 2950 events. 1751/2950 cut-off events. For 100259/100259 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17529 event pairs, 351 based on Foata normal form. 4/2953 useless extension candidates. Maximal degree in co-relation 19401. Up to 2643 conditions per place. [2024-06-14 13:52:18,400 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 37 changer transitions 0/262 dead transitions. [2024-06-14 13:52:18,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 262 transitions, 4251 flow [2024-06-14 13:52:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 13:52:18,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:52:18,402 INFO L175 Difference]: Start difference. First operand has 173 places, 247 transitions, 3695 flow. Second operand 7 states and 154 transitions. [2024-06-14 13:52:18,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 262 transitions, 4251 flow [2024-06-14 13:52:18,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 262 transitions, 3899 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:18,627 INFO L231 Difference]: Finished difference. Result has 172 places, 247 transitions, 3432 flow [2024-06-14 13:52:18,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3432, PETRI_PLACES=172, PETRI_TRANSITIONS=247} [2024-06-14 13:52:18,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-14 13:52:18,629 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 247 transitions, 3432 flow [2024-06-14 13:52:18,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:18,629 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 13:52:18,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:52:18,629 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:18,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:18,630 INFO L85 PathProgramCache]: Analyzing trace with hash 745600613, now seen corresponding path program 5 times [2024-06-14 13:52:18,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:18,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705041630] [2024-06-14 13:52:18,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:18,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:18,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:18,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705041630] [2024-06-14 13:52:18,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705041630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:18,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:18,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:18,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448840176] [2024-06-14 13:52:18,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:18,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:18,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:18,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:18,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:18,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:18,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 247 transitions, 3432 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:18,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:18,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:19,250 INFO L124 PetriNetUnfolderBase]: 1743/2935 cut-off events. [2024-06-14 13:52:19,250 INFO L125 PetriNetUnfolderBase]: For 100115/100115 co-relation queries the response was YES. [2024-06-14 13:52:19,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18876 conditions, 2935 events. 1743/2935 cut-off events. For 100115/100115 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17394 event pairs, 351 based on Foata normal form. 4/2938 useless extension candidates. Maximal degree in co-relation 18792. Up to 2381 conditions per place. [2024-06-14 13:52:19,275 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 170 selfloop transitions, 102 changer transitions 0/278 dead transitions. [2024-06-14 13:52:19,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 278 transitions, 4276 flow [2024-06-14 13:52:19,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:52:19,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 13:52:19,277 INFO L175 Difference]: Start difference. First operand has 172 places, 247 transitions, 3432 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:52:19,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 278 transitions, 4276 flow [2024-06-14 13:52:19,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 278 transitions, 4202 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:19,479 INFO L231 Difference]: Finished difference. Result has 173 places, 250 transitions, 3666 flow [2024-06-14 13:52:19,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3666, PETRI_PLACES=173, PETRI_TRANSITIONS=250} [2024-06-14 13:52:19,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-14 13:52:19,480 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 250 transitions, 3666 flow [2024-06-14 13:52:19,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:19,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:19,485 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 13:52:19,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:52:19,485 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:19,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:19,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1871354679, now seen corresponding path program 6 times [2024-06-14 13:52:19,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:19,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407140979] [2024-06-14 13:52:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:19,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:19,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:19,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407140979] [2024-06-14 13:52:19,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407140979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:19,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:19,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:19,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939628010] [2024-06-14 13:52:19,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:19,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:19,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:19,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:19,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 250 transitions, 3666 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:19,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:19,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:19,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:20,107 INFO L124 PetriNetUnfolderBase]: 1719/2900 cut-off events. [2024-06-14 13:52:20,108 INFO L125 PetriNetUnfolderBase]: For 102423/102425 co-relation queries the response was YES. [2024-06-14 13:52:20,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18853 conditions, 2900 events. 1719/2900 cut-off events. For 102423/102425 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17227 event pairs, 358 based on Foata normal form. 6/2905 useless extension candidates. Maximal degree in co-relation 18768. Up to 2361 conditions per place. [2024-06-14 13:52:20,134 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 95 changer transitions 0/273 dead transitions. [2024-06-14 13:52:20,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 273 transitions, 4340 flow [2024-06-14 13:52:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 13:52:20,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 13:52:20,136 INFO L175 Difference]: Start difference. First operand has 173 places, 250 transitions, 3666 flow. Second operand 6 states and 153 transitions. [2024-06-14 13:52:20,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 273 transitions, 4340 flow [2024-06-14 13:52:20,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 273 transitions, 4112 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:20,369 INFO L231 Difference]: Finished difference. Result has 173 places, 250 transitions, 3652 flow [2024-06-14 13:52:20,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3652, PETRI_PLACES=173, PETRI_TRANSITIONS=250} [2024-06-14 13:52:20,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-14 13:52:20,370 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 250 transitions, 3652 flow [2024-06-14 13:52:20,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:20,371 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 13:52:20,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:52:20,371 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:20,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:20,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1871351052, now seen corresponding path program 4 times [2024-06-14 13:52:20,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:20,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152859691] [2024-06-14 13:52:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:20,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:20,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:20,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152859691] [2024-06-14 13:52:20,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152859691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:20,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:20,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:20,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914860038] [2024-06-14 13:52:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:20,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:20,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:20,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:20,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:20,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:20,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 250 transitions, 3652 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:20,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:20,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:20,994 INFO L124 PetriNetUnfolderBase]: 1774/2993 cut-off events. [2024-06-14 13:52:20,995 INFO L125 PetriNetUnfolderBase]: For 101639/101641 co-relation queries the response was YES. [2024-06-14 13:52:21,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19456 conditions, 2993 events. 1774/2993 cut-off events. For 101639/101641 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 17885 event pairs, 358 based on Foata normal form. 5/2997 useless extension candidates. Maximal degree in co-relation 19372. Up to 2350 conditions per place. [2024-06-14 13:52:21,025 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 114 changer transitions 0/295 dead transitions. [2024-06-14 13:52:21,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 295 transitions, 4796 flow [2024-06-14 13:52:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 13:52:21,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-14 13:52:21,027 INFO L175 Difference]: Start difference. First operand has 173 places, 250 transitions, 3652 flow. Second operand 7 states and 178 transitions. [2024-06-14 13:52:21,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 295 transitions, 4796 flow [2024-06-14 13:52:21,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 295 transitions, 4506 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:21,240 INFO L231 Difference]: Finished difference. Result has 175 places, 265 transitions, 3962 flow [2024-06-14 13:52:21,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3962, PETRI_PLACES=175, PETRI_TRANSITIONS=265} [2024-06-14 13:52:21,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-14 13:52:21,240 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 265 transitions, 3962 flow [2024-06-14 13:52:21,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:21,241 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 13:52:21,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:52:21,241 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:21,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:21,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1871362212, now seen corresponding path program 5 times [2024-06-14 13:52:21,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:21,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123433235] [2024-06-14 13:52:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:21,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:21,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:21,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123433235] [2024-06-14 13:52:21,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123433235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:21,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:21,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:21,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543673463] [2024-06-14 13:52:21,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:21,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:21,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:21,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:21,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:21,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:21,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 265 transitions, 3962 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:21,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:21,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:21,890 INFO L124 PetriNetUnfolderBase]: 1785/3014 cut-off events. [2024-06-14 13:52:21,890 INFO L125 PetriNetUnfolderBase]: For 101884/101886 co-relation queries the response was YES. [2024-06-14 13:52:21,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19928 conditions, 3014 events. 1785/3014 cut-off events. For 101884/101886 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18078 event pairs, 358 based on Foata normal form. 5/3018 useless extension candidates. Maximal degree in co-relation 19842. Up to 2363 conditions per place. [2024-06-14 13:52:21,928 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 181 selfloop transitions, 108 changer transitions 0/295 dead transitions. [2024-06-14 13:52:21,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 295 transitions, 4973 flow [2024-06-14 13:52:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:21,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:52:21,930 INFO L175 Difference]: Start difference. First operand has 175 places, 265 transitions, 3962 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:21,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 295 transitions, 4973 flow [2024-06-14 13:52:22,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 295 transitions, 4902 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:22,189 INFO L231 Difference]: Finished difference. Result has 182 places, 271 transitions, 4246 flow [2024-06-14 13:52:22,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3893, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4246, PETRI_PLACES=182, PETRI_TRANSITIONS=271} [2024-06-14 13:52:22,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-14 13:52:22,190 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 271 transitions, 4246 flow [2024-06-14 13:52:22,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:22,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:22,190 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 13:52:22,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:52:22,191 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:22,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash 835250642, now seen corresponding path program 1 times [2024-06-14 13:52:22,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:22,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789140704] [2024-06-14 13:52:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:22,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:22,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789140704] [2024-06-14 13:52:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789140704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:22,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:22,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:22,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029693733] [2024-06-14 13:52:22,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:22,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:22,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:22,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:22,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:22,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:22,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 271 transitions, 4246 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:22,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:22,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:22,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:22,891 INFO L124 PetriNetUnfolderBase]: 1808/3029 cut-off events. [2024-06-14 13:52:22,892 INFO L125 PetriNetUnfolderBase]: For 112099/112107 co-relation queries the response was YES. [2024-06-14 13:52:22,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20738 conditions, 3029 events. 1808/3029 cut-off events. For 112099/112107 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18049 event pairs, 415 based on Foata normal form. 6/3030 useless extension candidates. Maximal degree in co-relation 20649. Up to 2186 conditions per place. [2024-06-14 13:52:22,918 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 118 selfloop transitions, 178 changer transitions 0/302 dead transitions. [2024-06-14 13:52:22,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 302 transitions, 5322 flow [2024-06-14 13:52:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 13:52:22,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 13:52:22,919 INFO L175 Difference]: Start difference. First operand has 182 places, 271 transitions, 4246 flow. Second operand 7 states and 170 transitions. [2024-06-14 13:52:22,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 302 transitions, 5322 flow [2024-06-14 13:52:23,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 302 transitions, 5100 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:23,147 INFO L231 Difference]: Finished difference. Result has 186 places, 282 transitions, 4580 flow [2024-06-14 13:52:23,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4030, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4580, PETRI_PLACES=186, PETRI_TRANSITIONS=282} [2024-06-14 13:52:23,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-14 13:52:23,148 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 282 transitions, 4580 flow [2024-06-14 13:52:23,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:23,149 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 13:52:23,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:52:23,149 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:23,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2130284992, now seen corresponding path program 2 times [2024-06-14 13:52:23,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:23,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896117993] [2024-06-14 13:52:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:23,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:23,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:23,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896117993] [2024-06-14 13:52:23,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896117993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:23,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:23,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:23,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165515792] [2024-06-14 13:52:23,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:23,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:23,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:23,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:23,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:23,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 282 transitions, 4580 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:23,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:23,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:23,816 INFO L124 PetriNetUnfolderBase]: 1850/3120 cut-off events. [2024-06-14 13:52:23,816 INFO L125 PetriNetUnfolderBase]: For 118025/118025 co-relation queries the response was YES. [2024-06-14 13:52:23,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21877 conditions, 3120 events. 1850/3120 cut-off events. For 118025/118025 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 18791 event pairs, 351 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 21787. Up to 2757 conditions per place. [2024-06-14 13:52:23,847 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 50 changer transitions 0/314 dead transitions. [2024-06-14 13:52:23,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 314 transitions, 5730 flow [2024-06-14 13:52:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 13:52:23,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 13:52:23,849 INFO L175 Difference]: Start difference. First operand has 186 places, 282 transitions, 4580 flow. Second operand 8 states and 174 transitions. [2024-06-14 13:52:23,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 314 transitions, 5730 flow [2024-06-14 13:52:24,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 314 transitions, 5495 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:24,083 INFO L231 Difference]: Finished difference. Result has 193 places, 296 transitions, 4810 flow [2024-06-14 13:52:24,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4383, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4810, PETRI_PLACES=193, PETRI_TRANSITIONS=296} [2024-06-14 13:52:24,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-14 13:52:24,084 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 296 transitions, 4810 flow [2024-06-14 13:52:24,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:24,084 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 13:52:24,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:52:24,085 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 13:52:24,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1877076690, now seen corresponding path program 3 times [2024-06-14 13:52:24,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:24,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459795874] [2024-06-14 13:52:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:24,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459795874] [2024-06-14 13:52:24,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459795874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:24,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:24,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:24,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086560944] [2024-06-14 13:52:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:24,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:24,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:24,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:24,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 296 transitions, 4810 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:24,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:24,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:24,841 INFO L124 PetriNetUnfolderBase]: 1857/3139 cut-off events. [2024-06-14 13:52:24,841 INFO L125 PetriNetUnfolderBase]: For 121821/121821 co-relation queries the response was YES. [2024-06-14 13:52:24,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21735 conditions, 3139 events. 1857/3139 cut-off events. For 121821/121821 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18982 event pairs, 350 based on Foata normal form. 3/3141 useless extension candidates. Maximal degree in co-relation 21642. Up to 2430 conditions per place. [2024-06-14 13:52:24,877 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 179 selfloop transitions, 146 changer transitions 0/331 dead transitions. [2024-06-14 13:52:24,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 331 transitions, 5890 flow [2024-06-14 13:52:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:52:24,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:52:24,879 INFO L175 Difference]: Start difference. First operand has 193 places, 296 transitions, 4810 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:52:24,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 331 transitions, 5890 flow [2024-06-14 13:52:25,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 331 transitions, 5826 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:25,151 INFO L231 Difference]: Finished difference. Result has 199 places, 301 transitions, 5151 flow [2024-06-14 13:52:25,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5151, PETRI_PLACES=199, PETRI_TRANSITIONS=301} [2024-06-14 13:52:25,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-14 13:52:25,151 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 301 transitions, 5151 flow [2024-06-14 13:52:25,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:25,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:25,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:52:25,152 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 13:52:25,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:25,153 INFO L85 PathProgramCache]: Analyzing trace with hash 811371509, now seen corresponding path program 1 times [2024-06-14 13:52:25,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:25,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463249852] [2024-06-14 13:52:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:25,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:25,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:25,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463249852] [2024-06-14 13:52:25,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463249852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:25,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:25,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:25,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292336973] [2024-06-14 13:52:25,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:25,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:25,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:25,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:25,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:25,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 301 transitions, 5151 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:25,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:25,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:25,895 INFO L124 PetriNetUnfolderBase]: 1960/3282 cut-off events. [2024-06-14 13:52:25,895 INFO L125 PetriNetUnfolderBase]: For 149021/149021 co-relation queries the response was YES. [2024-06-14 13:52:25,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23373 conditions, 3282 events. 1960/3282 cut-off events. For 149021/149021 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19761 event pairs, 305 based on Foata normal form. 12/3289 useless extension candidates. Maximal degree in co-relation 23278. Up to 2400 conditions per place. [2024-06-14 13:52:25,937 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 104 changer transitions 0/345 dead transitions. [2024-06-14 13:52:25,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 345 transitions, 6383 flow [2024-06-14 13:52:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 13:52:25,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 13:52:25,938 INFO L175 Difference]: Start difference. First operand has 199 places, 301 transitions, 5151 flow. Second operand 7 states and 182 transitions. [2024-06-14 13:52:25,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 345 transitions, 6383 flow [2024-06-14 13:52:26,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 345 transitions, 6229 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:26,235 INFO L231 Difference]: Finished difference. Result has 203 places, 307 transitions, 5313 flow [2024-06-14 13:52:26,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5005, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5313, PETRI_PLACES=203, PETRI_TRANSITIONS=307} [2024-06-14 13:52:26,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-14 13:52:26,236 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 307 transitions, 5313 flow [2024-06-14 13:52:26,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:26,236 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 13:52:26,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:52:26,236 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 13:52:26,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:26,237 INFO L85 PathProgramCache]: Analyzing trace with hash 591174865, now seen corresponding path program 2 times [2024-06-14 13:52:26,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:26,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877262271] [2024-06-14 13:52:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:26,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:26,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:26,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877262271] [2024-06-14 13:52:26,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877262271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:26,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:26,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:26,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646234117] [2024-06-14 13:52:26,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:26,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:26,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:26,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:26,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:26,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:26,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 307 transitions, 5313 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:26,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:26,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:26,948 INFO L124 PetriNetUnfolderBase]: 2004/3344 cut-off events. [2024-06-14 13:52:26,948 INFO L125 PetriNetUnfolderBase]: For 151065/151065 co-relation queries the response was YES. [2024-06-14 13:52:26,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24182 conditions, 3344 events. 2004/3344 cut-off events. For 151065/151065 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20144 event pairs, 421 based on Foata normal form. 12/3351 useless extension candidates. Maximal degree in co-relation 24085. Up to 2714 conditions per place. [2024-06-14 13:52:26,982 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 99 changer transitions 0/340 dead transitions. [2024-06-14 13:52:26,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 340 transitions, 6379 flow [2024-06-14 13:52:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 13:52:26,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:52:26,983 INFO L175 Difference]: Start difference. First operand has 203 places, 307 transitions, 5313 flow. Second operand 7 states and 175 transitions. [2024-06-14 13:52:26,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 340 transitions, 6379 flow [2024-06-14 13:52:27,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 340 transitions, 6203 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:27,325 INFO L231 Difference]: Finished difference. Result has 207 places, 310 transitions, 5398 flow [2024-06-14 13:52:27,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5145, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5398, PETRI_PLACES=207, PETRI_TRANSITIONS=310} [2024-06-14 13:52:27,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-14 13:52:27,325 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 310 transitions, 5398 flow [2024-06-14 13:52:27,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:27,326 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 13:52:27,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:52:27,326 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:27,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:27,326 INFO L85 PathProgramCache]: Analyzing trace with hash 701053993, now seen corresponding path program 1 times [2024-06-14 13:52:27,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:27,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935232998] [2024-06-14 13:52:27,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:27,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:27,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:27,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935232998] [2024-06-14 13:52:27,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935232998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:27,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:27,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:27,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057126615] [2024-06-14 13:52:27,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:27,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:27,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:27,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:27,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 310 transitions, 5398 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:27,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:27,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:28,004 INFO L124 PetriNetUnfolderBase]: 2030/3390 cut-off events. [2024-06-14 13:52:28,004 INFO L125 PetriNetUnfolderBase]: For 149647/149647 co-relation queries the response was YES. [2024-06-14 13:52:28,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24920 conditions, 3390 events. 2030/3390 cut-off events. For 149647/149647 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 20535 event pairs, 443 based on Foata normal form. 2/3387 useless extension candidates. Maximal degree in co-relation 24821. Up to 2460 conditions per place. [2024-06-14 13:52:28,041 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 146 selfloop transitions, 191 changer transitions 0/343 dead transitions. [2024-06-14 13:52:28,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 343 transitions, 6593 flow [2024-06-14 13:52:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 13:52:28,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 13:52:28,043 INFO L175 Difference]: Start difference. First operand has 207 places, 310 transitions, 5398 flow. Second operand 7 states and 170 transitions. [2024-06-14 13:52:28,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 343 transitions, 6593 flow [2024-06-14 13:52:28,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 343 transitions, 6380 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:28,397 INFO L231 Difference]: Finished difference. Result has 210 places, 320 transitions, 5811 flow [2024-06-14 13:52:28,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5185, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5811, PETRI_PLACES=210, PETRI_TRANSITIONS=320} [2024-06-14 13:52:28,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-14 13:52:28,397 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 320 transitions, 5811 flow [2024-06-14 13:52:28,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:28,398 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 13:52:28,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:52:28,398 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:28,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:28,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1521460397, now seen corresponding path program 1 times [2024-06-14 13:52:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:28,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572683035] [2024-06-14 13:52:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:28,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:28,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:28,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572683035] [2024-06-14 13:52:28,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572683035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:28,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:28,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:28,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687332936] [2024-06-14 13:52:28,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:28,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:28,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:28,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:28,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 320 transitions, 5811 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:28,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:28,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:29,277 INFO L124 PetriNetUnfolderBase]: 2040/3407 cut-off events. [2024-06-14 13:52:29,278 INFO L125 PetriNetUnfolderBase]: For 156660/156660 co-relation queries the response was YES. [2024-06-14 13:52:29,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25529 conditions, 3407 events. 2040/3407 cut-off events. For 156660/156660 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20620 event pairs, 418 based on Foata normal form. 2/3404 useless extension candidates. Maximal degree in co-relation 25428. Up to 2804 conditions per place. [2024-06-14 13:52:29,315 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 95 changer transitions 0/346 dead transitions. [2024-06-14 13:52:29,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 346 transitions, 6801 flow [2024-06-14 13:52:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:52:29,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 13:52:29,317 INFO L175 Difference]: Start difference. First operand has 210 places, 320 transitions, 5811 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:52:29,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 346 transitions, 6801 flow [2024-06-14 13:52:29,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 346 transitions, 6544 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:29,673 INFO L231 Difference]: Finished difference. Result has 214 places, 324 transitions, 5825 flow [2024-06-14 13:52:29,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5558, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5825, PETRI_PLACES=214, PETRI_TRANSITIONS=324} [2024-06-14 13:52:29,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-14 13:52:29,674 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 324 transitions, 5825 flow [2024-06-14 13:52:29,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:29,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:29,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:52:29,674 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:29,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:29,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1107190187, now seen corresponding path program 2 times [2024-06-14 13:52:29,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:29,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130640812] [2024-06-14 13:52:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:29,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:29,842 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 13:52:29,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:29,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130640812] [2024-06-14 13:52:29,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130640812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:29,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:29,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:29,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961658101] [2024-06-14 13:52:29,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:29,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:29,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:29,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:29,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:29,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:29,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 324 transitions, 5825 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:29,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:29,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:30,380 INFO L124 PetriNetUnfolderBase]: 2050/3421 cut-off events. [2024-06-14 13:52:30,381 INFO L125 PetriNetUnfolderBase]: For 163210/163210 co-relation queries the response was YES. [2024-06-14 13:52:30,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25503 conditions, 3421 events. 2050/3421 cut-off events. For 163210/163210 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 20712 event pairs, 443 based on Foata normal form. 2/3418 useless extension candidates. Maximal degree in co-relation 25401. Up to 2472 conditions per place. [2024-06-14 13:52:30,420 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 185 changer transitions 0/348 dead transitions. [2024-06-14 13:52:30,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 348 transitions, 6913 flow [2024-06-14 13:52:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:52:30,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 13:52:30,421 INFO L175 Difference]: Start difference. First operand has 214 places, 324 transitions, 5825 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:52:30,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 348 transitions, 6913 flow [2024-06-14 13:52:30,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 348 transitions, 6701 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:30,769 INFO L231 Difference]: Finished difference. Result has 216 places, 328 transitions, 6069 flow [2024-06-14 13:52:30,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6069, PETRI_PLACES=216, PETRI_TRANSITIONS=328} [2024-06-14 13:52:30,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-14 13:52:30,771 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 328 transitions, 6069 flow [2024-06-14 13:52:30,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:30,772 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 13:52:30,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:52:30,772 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:30,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash 141413913, now seen corresponding path program 2 times [2024-06-14 13:52:30,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:30,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237859416] [2024-06-14 13:52:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:30,966 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 13:52:30,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:30,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237859416] [2024-06-14 13:52:30,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237859416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:30,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:30,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:30,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743172813] [2024-06-14 13:52:30,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:30,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:30,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:30,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:30,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:31,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:31,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 328 transitions, 6069 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:31,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:31,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:31,703 INFO L124 PetriNetUnfolderBase]: 2060/3441 cut-off events. [2024-06-14 13:52:31,704 INFO L125 PetriNetUnfolderBase]: For 170755/170755 co-relation queries the response was YES. [2024-06-14 13:52:31,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26077 conditions, 3441 events. 2060/3441 cut-off events. For 170755/170755 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 20899 event pairs, 416 based on Foata normal form. 2/3438 useless extension candidates. Maximal degree in co-relation 25974. Up to 2828 conditions per place. [2024-06-14 13:52:31,743 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 253 selfloop transitions, 96 changer transitions 0/355 dead transitions. [2024-06-14 13:52:31,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 355 transitions, 7209 flow [2024-06-14 13:52:31,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:52:31,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 13:52:31,745 INFO L175 Difference]: Start difference. First operand has 216 places, 328 transitions, 6069 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:52:31,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 355 transitions, 7209 flow [2024-06-14 13:52:32,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 355 transitions, 6848 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:32,269 INFO L231 Difference]: Finished difference. Result has 220 places, 334 transitions, 6013 flow [2024-06-14 13:52:32,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5714, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6013, PETRI_PLACES=220, PETRI_TRANSITIONS=334} [2024-06-14 13:52:32,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-14 13:52:32,270 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 334 transitions, 6013 flow [2024-06-14 13:52:32,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:32,270 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 13:52:32,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:52:32,271 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:32,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:32,271 INFO L85 PathProgramCache]: Analyzing trace with hash 878185513, now seen corresponding path program 3 times [2024-06-14 13:52:32,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:32,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736099034] [2024-06-14 13:52:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:32,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:32,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:32,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736099034] [2024-06-14 13:52:32,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736099034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:32,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:32,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:32,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694265805] [2024-06-14 13:52:32,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:32,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:32,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:32,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:32,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 334 transitions, 6013 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:32,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:32,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:32,990 INFO L124 PetriNetUnfolderBase]: 2054/3425 cut-off events. [2024-06-14 13:52:32,990 INFO L125 PetriNetUnfolderBase]: For 172499/172499 co-relation queries the response was YES. [2024-06-14 13:52:33,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25705 conditions, 3425 events. 2054/3425 cut-off events. For 172499/172499 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 20743 event pairs, 444 based on Foata normal form. 2/3422 useless extension candidates. Maximal degree in co-relation 25601. Up to 2475 conditions per place. [2024-06-14 13:52:33,026 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 188 changer transitions 0/354 dead transitions. [2024-06-14 13:52:33,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 354 transitions, 7051 flow [2024-06-14 13:52:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:52:33,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 13:52:33,028 INFO L175 Difference]: Start difference. First operand has 220 places, 334 transitions, 6013 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:52:33,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 354 transitions, 7051 flow [2024-06-14 13:52:33,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 354 transitions, 6872 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:33,454 INFO L231 Difference]: Finished difference. Result has 223 places, 334 transitions, 6217 flow [2024-06-14 13:52:33,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5834, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6217, PETRI_PLACES=223, PETRI_TRANSITIONS=334} [2024-06-14 13:52:33,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 13:52:33,455 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 334 transitions, 6217 flow [2024-06-14 13:52:33,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:33,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:33,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:52:33,456 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:33,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:33,456 INFO L85 PathProgramCache]: Analyzing trace with hash 878062195, now seen corresponding path program 3 times [2024-06-14 13:52:33,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:33,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059387013] [2024-06-14 13:52:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:33,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:33,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:33,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059387013] [2024-06-14 13:52:33,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059387013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:33,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:33,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:33,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520878613] [2024-06-14 13:52:33,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:33,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:33,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:33,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:33,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:33,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:33,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 334 transitions, 6217 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:33,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:33,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:34,228 INFO L124 PetriNetUnfolderBase]: 2098/3495 cut-off events. [2024-06-14 13:52:34,229 INFO L125 PetriNetUnfolderBase]: For 194331/194331 co-relation queries the response was YES. [2024-06-14 13:52:34,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26449 conditions, 3495 events. 2098/3495 cut-off events. For 194331/194331 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21176 event pairs, 426 based on Foata normal form. 12/3502 useless extension candidates. Maximal degree in co-relation 26343. Up to 2844 conditions per place. [2024-06-14 13:52:34,267 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 99 changer transitions 0/360 dead transitions. [2024-06-14 13:52:34,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 360 transitions, 7239 flow [2024-06-14 13:52:34,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:52:34,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:52:34,268 INFO L175 Difference]: Start difference. First operand has 223 places, 334 transitions, 6217 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:52:34,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 360 transitions, 7239 flow [2024-06-14 13:52:34,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 360 transitions, 6883 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:34,692 INFO L231 Difference]: Finished difference. Result has 226 places, 337 transitions, 6120 flow [2024-06-14 13:52:34,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5861, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6120, PETRI_PLACES=226, PETRI_TRANSITIONS=337} [2024-06-14 13:52:34,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 13:52:34,693 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 337 transitions, 6120 flow [2024-06-14 13:52:34,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:34,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:34,693 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 13:52:34,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:52:34,693 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:34,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash 878431591, now seen corresponding path program 1 times [2024-06-14 13:52:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:34,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342027507] [2024-06-14 13:52:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:34,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:34,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:34,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342027507] [2024-06-14 13:52:34,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342027507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:34,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:34,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:34,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150302628] [2024-06-14 13:52:34,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:34,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:34,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:34,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:34,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:34,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:34,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 337 transitions, 6120 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:34,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:34,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:34,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:35,478 INFO L124 PetriNetUnfolderBase]: 2106/3524 cut-off events. [2024-06-14 13:52:35,478 INFO L125 PetriNetUnfolderBase]: For 184614/184614 co-relation queries the response was YES. [2024-06-14 13:52:35,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26476 conditions, 3524 events. 2106/3524 cut-off events. For 184614/184614 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21453 event pairs, 389 based on Foata normal form. 2/3525 useless extension candidates. Maximal degree in co-relation 26369. Up to 3176 conditions per place. [2024-06-14 13:52:35,514 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 324 selfloop transitions, 27 changer transitions 0/357 dead transitions. [2024-06-14 13:52:35,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 357 transitions, 6914 flow [2024-06-14 13:52:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 13:52:35,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 13:52:35,515 INFO L175 Difference]: Start difference. First operand has 226 places, 337 transitions, 6120 flow. Second operand 7 states and 152 transitions. [2024-06-14 13:52:35,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 357 transitions, 6914 flow [2024-06-14 13:52:35,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 357 transitions, 6695 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:35,890 INFO L231 Difference]: Finished difference. Result has 228 places, 339 transitions, 6012 flow [2024-06-14 13:52:35,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5901, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6012, PETRI_PLACES=228, PETRI_TRANSITIONS=339} [2024-06-14 13:52:35,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-14 13:52:35,891 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 339 transitions, 6012 flow [2024-06-14 13:52:35,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:35,891 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 13:52:35,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:52:35,892 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 13:52:35,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:35,892 INFO L85 PathProgramCache]: Analyzing trace with hash -645479789, now seen corresponding path program 3 times [2024-06-14 13:52:35,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:35,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956979162] [2024-06-14 13:52:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:35,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:36,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:36,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956979162] [2024-06-14 13:52:36,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956979162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:36,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:36,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:36,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532731401] [2024-06-14 13:52:36,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:36,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:36,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:36,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:36,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:36,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:36,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 339 transitions, 6012 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:36,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:36,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:36,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:36,624 INFO L124 PetriNetUnfolderBase]: 2103/3504 cut-off events. [2024-06-14 13:52:36,624 INFO L125 PetriNetUnfolderBase]: For 189569/189577 co-relation queries the response was YES. [2024-06-14 13:52:36,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26187 conditions, 3504 events. 2103/3504 cut-off events. For 189569/189577 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21299 event pairs, 428 based on Foata normal form. 4/3503 useless extension candidates. Maximal degree in co-relation 26079. Up to 2898 conditions per place. [2024-06-14 13:52:36,666 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 103 changer transitions 0/358 dead transitions. [2024-06-14 13:52:36,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 358 transitions, 6970 flow [2024-06-14 13:52:36,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:52:36,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 13:52:36,667 INFO L175 Difference]: Start difference. First operand has 228 places, 339 transitions, 6012 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:52:36,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 358 transitions, 6970 flow [2024-06-14 13:52:37,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 358 transitions, 6867 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:37,149 INFO L231 Difference]: Finished difference. Result has 230 places, 339 transitions, 6121 flow [2024-06-14 13:52:37,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5909, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6121, PETRI_PLACES=230, PETRI_TRANSITIONS=339} [2024-06-14 13:52:37,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 13:52:37,150 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 339 transitions, 6121 flow [2024-06-14 13:52:37,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:37,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:37,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:52:37,150 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 13:52:37,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:37,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1259812477, now seen corresponding path program 4 times [2024-06-14 13:52:37,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:37,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984191968] [2024-06-14 13:52:37,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:37,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:37,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:37,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984191968] [2024-06-14 13:52:37,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984191968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:37,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:37,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:37,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280203635] [2024-06-14 13:52:37,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:37,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:37,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:37,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:37,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:37,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 339 transitions, 6121 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:37,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:37,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:37,900 INFO L124 PetriNetUnfolderBase]: 2093/3484 cut-off events. [2024-06-14 13:52:37,900 INFO L125 PetriNetUnfolderBase]: For 196516/196524 co-relation queries the response was YES. [2024-06-14 13:52:37,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26318 conditions, 3484 events. 2093/3484 cut-off events. For 196516/196524 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21140 event pairs, 447 based on Foata normal form. 5/3484 useless extension candidates. Maximal degree in co-relation 26209. Up to 2546 conditions per place. [2024-06-14 13:52:37,940 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 144 selfloop transitions, 209 changer transitions 0/359 dead transitions. [2024-06-14 13:52:37,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 359 transitions, 7193 flow [2024-06-14 13:52:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:52:37,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 13:52:37,941 INFO L175 Difference]: Start difference. First operand has 230 places, 339 transitions, 6121 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:52:37,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 359 transitions, 7193 flow [2024-06-14 13:52:38,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 359 transitions, 6951 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:38,352 INFO L231 Difference]: Finished difference. Result has 232 places, 339 transitions, 6304 flow [2024-06-14 13:52:38,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5879, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6304, PETRI_PLACES=232, PETRI_TRANSITIONS=339} [2024-06-14 13:52:38,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-14 13:52:38,353 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 339 transitions, 6304 flow [2024-06-14 13:52:38,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:38,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:38,353 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 13:52:38,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:52:38,354 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 13:52:38,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1499021311, now seen corresponding path program 4 times [2024-06-14 13:52:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:38,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019936723] [2024-06-14 13:52:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:38,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:38,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:38,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019936723] [2024-06-14 13:52:38,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019936723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:38,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:38,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:38,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064437738] [2024-06-14 13:52:38,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:38,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:38,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:38,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:38,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:38,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 339 transitions, 6304 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:38,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:38,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:38,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:39,096 INFO L124 PetriNetUnfolderBase]: 2090/3486 cut-off events. [2024-06-14 13:52:39,097 INFO L125 PetriNetUnfolderBase]: For 200337/200345 co-relation queries the response was YES. [2024-06-14 13:52:39,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26650 conditions, 3486 events. 2090/3486 cut-off events. For 200337/200345 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21169 event pairs, 428 based on Foata normal form. 4/3485 useless extension candidates. Maximal degree in co-relation 26540. Up to 2882 conditions per place. [2024-06-14 13:52:39,134 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 107 changer transitions 0/357 dead transitions. [2024-06-14 13:52:39,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 357 transitions, 7158 flow [2024-06-14 13:52:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:52:39,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:52:39,135 INFO L175 Difference]: Start difference. First operand has 232 places, 339 transitions, 6304 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:52:39,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 357 transitions, 7158 flow [2024-06-14 13:52:39,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 357 transitions, 6214 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-14 13:52:39,564 INFO L231 Difference]: Finished difference. Result has 226 places, 339 transitions, 5580 flow [2024-06-14 13:52:39,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5360, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5580, PETRI_PLACES=226, PETRI_TRANSITIONS=339} [2024-06-14 13:52:39,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 13:52:39,565 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 339 transitions, 5580 flow [2024-06-14 13:52:39,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:39,565 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 13:52:39,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:52:39,566 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 13:52:39,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1269989467, now seen corresponding path program 5 times [2024-06-14 13:52:39,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:39,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425540620] [2024-06-14 13:52:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:39,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:39,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:39,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425540620] [2024-06-14 13:52:39,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425540620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:39,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:39,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:39,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568123267] [2024-06-14 13:52:39,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:39,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:39,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:39,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:39,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:39,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:39,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 339 transitions, 5580 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:39,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:39,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:40,294 INFO L124 PetriNetUnfolderBase]: 2084/3492 cut-off events. [2024-06-14 13:52:40,294 INFO L125 PetriNetUnfolderBase]: For 194869/194869 co-relation queries the response was YES. [2024-06-14 13:52:40,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25791 conditions, 3492 events. 2084/3492 cut-off events. For 194869/194869 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21274 event pairs, 385 based on Foata normal form. 2/3493 useless extension candidates. Maximal degree in co-relation 25682. Up to 3115 conditions per place. [2024-06-14 13:52:40,333 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 50 changer transitions 0/357 dead transitions. [2024-06-14 13:52:40,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 357 transitions, 6555 flow [2024-06-14 13:52:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 13:52:40,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 13:52:40,334 INFO L175 Difference]: Start difference. First operand has 226 places, 339 transitions, 5580 flow. Second operand 8 states and 174 transitions. [2024-06-14 13:52:40,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 357 transitions, 6555 flow [2024-06-14 13:52:40,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 357 transitions, 6339 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:40,770 INFO L231 Difference]: Finished difference. Result has 230 places, 339 transitions, 5477 flow [2024-06-14 13:52:40,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5370, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5477, PETRI_PLACES=230, PETRI_TRANSITIONS=339} [2024-06-14 13:52:40,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 13:52:40,771 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 339 transitions, 5477 flow [2024-06-14 13:52:40,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:40,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:40,771 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 13:52:40,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:52:40,771 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 13:52:40,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:40,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1085107895, now seen corresponding path program 6 times [2024-06-14 13:52:40,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:40,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627348680] [2024-06-14 13:52:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:40,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:40,962 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 13:52:40,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:40,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627348680] [2024-06-14 13:52:40,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627348680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:40,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:40,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:40,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268673978] [2024-06-14 13:52:40,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:40,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:40,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:41,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:41,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 339 transitions, 5477 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:41,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:41,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:41,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:41,595 INFO L124 PetriNetUnfolderBase]: 2076/3480 cut-off events. [2024-06-14 13:52:41,595 INFO L125 PetriNetUnfolderBase]: For 190791/190791 co-relation queries the response was YES. [2024-06-14 13:52:41,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25292 conditions, 3480 events. 2076/3480 cut-off events. For 190791/190791 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 21245 event pairs, 385 based on Foata normal form. 2/3481 useless extension candidates. Maximal degree in co-relation 25182. Up to 2766 conditions per place. [2024-06-14 13:52:41,628 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 145 changer transitions 0/369 dead transitions. [2024-06-14 13:52:41,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 369 transitions, 6607 flow [2024-06-14 13:52:41,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 13:52:41,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-14 13:52:41,629 INFO L175 Difference]: Start difference. First operand has 230 places, 339 transitions, 5477 flow. Second operand 8 states and 195 transitions. [2024-06-14 13:52:41,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 369 transitions, 6607 flow [2024-06-14 13:52:42,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 369 transitions, 6485 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:42,032 INFO L231 Difference]: Finished difference. Result has 233 places, 339 transitions, 5657 flow [2024-06-14 13:52:42,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5657, PETRI_PLACES=233, PETRI_TRANSITIONS=339} [2024-06-14 13:52:42,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-14 13:52:42,033 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 339 transitions, 5657 flow [2024-06-14 13:52:42,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:42,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:42,033 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 13:52:42,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:52:42,034 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 13:52:42,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:42,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1927407209, now seen corresponding path program 7 times [2024-06-14 13:52:42,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:42,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274748190] [2024-06-14 13:52:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:42,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:42,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:42,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274748190] [2024-06-14 13:52:42,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274748190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:42,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:42,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:42,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319133226] [2024-06-14 13:52:42,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:42,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:42,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:42,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:42,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 339 transitions, 5657 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:42,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:42,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:42,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:42,790 INFO L124 PetriNetUnfolderBase]: 2086/3495 cut-off events. [2024-06-14 13:52:42,791 INFO L125 PetriNetUnfolderBase]: For 199203/199205 co-relation queries the response was YES. [2024-06-14 13:52:42,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25904 conditions, 3495 events. 2086/3495 cut-off events. For 199203/199205 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21345 event pairs, 392 based on Foata normal form. 4/3498 useless extension candidates. Maximal degree in co-relation 25793. Up to 2772 conditions per place. [2024-06-14 13:52:42,827 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 136 changer transitions 0/369 dead transitions. [2024-06-14 13:52:42,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 369 transitions, 6864 flow [2024-06-14 13:52:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:52:42,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-14 13:52:42,829 INFO L175 Difference]: Start difference. First operand has 233 places, 339 transitions, 5657 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:52:42,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 369 transitions, 6864 flow [2024-06-14 13:52:43,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 369 transitions, 6621 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:43,277 INFO L231 Difference]: Finished difference. Result has 234 places, 343 transitions, 5780 flow [2024-06-14 13:52:43,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5780, PETRI_PLACES=234, PETRI_TRANSITIONS=343} [2024-06-14 13:52:43,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-14 13:52:43,278 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 343 transitions, 5780 flow [2024-06-14 13:52:43,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:43,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:43,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:43,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:52:43,278 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 13:52:43,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:43,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2117308919, now seen corresponding path program 8 times [2024-06-14 13:52:43,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:43,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535020367] [2024-06-14 13:52:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:43,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:43,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:43,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535020367] [2024-06-14 13:52:43,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535020367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:43,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:43,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:43,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784191348] [2024-06-14 13:52:43,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:43,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:43,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:43,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:43,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 343 transitions, 5780 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:43,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:43,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:43,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:44,060 INFO L124 PetriNetUnfolderBase]: 2078/3483 cut-off events. [2024-06-14 13:52:44,061 INFO L125 PetriNetUnfolderBase]: For 196762/196764 co-relation queries the response was YES. [2024-06-14 13:52:44,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25636 conditions, 3483 events. 2078/3483 cut-off events. For 196762/196764 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21236 event pairs, 392 based on Foata normal form. 4/3486 useless extension candidates. Maximal degree in co-relation 25526. Up to 2767 conditions per place. [2024-06-14 13:52:44,101 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 130 changer transitions 0/365 dead transitions. [2024-06-14 13:52:44,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 365 transitions, 6776 flow [2024-06-14 13:52:44,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:52:44,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 13:52:44,105 INFO L175 Difference]: Start difference. First operand has 234 places, 343 transitions, 5780 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:52:44,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 365 transitions, 6776 flow [2024-06-14 13:52:44,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 365 transitions, 6296 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:44,561 INFO L231 Difference]: Finished difference. Result has 234 places, 343 transitions, 5569 flow [2024-06-14 13:52:44,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5569, PETRI_PLACES=234, PETRI_TRANSITIONS=343} [2024-06-14 13:52:44,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-14 13:52:44,564 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 343 transitions, 5569 flow [2024-06-14 13:52:44,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:44,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:44,564 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 13:52:44,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:52:44,564 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 13:52:44,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:44,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1927283891, now seen corresponding path program 4 times [2024-06-14 13:52:44,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:44,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895206476] [2024-06-14 13:52:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:44,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:44,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:44,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895206476] [2024-06-14 13:52:44,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895206476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:44,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:44,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:44,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850430993] [2024-06-14 13:52:44,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:44,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:44,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:44,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:44,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 343 transitions, 5569 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:44,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:44,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:44,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:45,361 INFO L124 PetriNetUnfolderBase]: 2228/3729 cut-off events. [2024-06-14 13:52:45,362 INFO L125 PetriNetUnfolderBase]: For 282769/282771 co-relation queries the response was YES. [2024-06-14 13:52:45,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26409 conditions, 3729 events. 2228/3729 cut-off events. For 282769/282771 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22921 event pairs, 326 based on Foata normal form. 56/3784 useless extension candidates. Maximal degree in co-relation 26298. Up to 2754 conditions per place. [2024-06-14 13:52:45,403 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 107 changer transitions 1/382 dead transitions. [2024-06-14 13:52:45,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 382 transitions, 6599 flow [2024-06-14 13:52:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 13:52:45,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-14 13:52:45,404 INFO L175 Difference]: Start difference. First operand has 234 places, 343 transitions, 5569 flow. Second operand 7 states and 184 transitions. [2024-06-14 13:52:45,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 382 transitions, 6599 flow [2024-06-14 13:52:45,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 382 transitions, 6293 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:45,868 INFO L231 Difference]: Finished difference. Result has 234 places, 345 transitions, 5533 flow [2024-06-14 13:52:45,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5263, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5533, PETRI_PLACES=234, PETRI_TRANSITIONS=345} [2024-06-14 13:52:45,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-14 13:52:45,869 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 345 transitions, 5533 flow [2024-06-14 13:52:45,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:45,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:45,870 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 13:52:45,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:52:45,870 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 13:52:45,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:45,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1927653287, now seen corresponding path program 2 times [2024-06-14 13:52:45,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:45,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31761821] [2024-06-14 13:52:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:45,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:46,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:46,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31761821] [2024-06-14 13:52:46,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31761821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:46,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:46,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:46,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402212809] [2024-06-14 13:52:46,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:46,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:46,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:46,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:46,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:46,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:46,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 345 transitions, 5533 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:46,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:46,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:46,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:46,766 INFO L124 PetriNetUnfolderBase]: 2226/3726 cut-off events. [2024-06-14 13:52:46,766 INFO L125 PetriNetUnfolderBase]: For 203683/203683 co-relation queries the response was YES. [2024-06-14 13:52:46,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26740 conditions, 3726 events. 2226/3726 cut-off events. For 203683/203683 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22888 event pairs, 430 based on Foata normal form. 2/3727 useless extension candidates. Maximal degree in co-relation 26628. Up to 3388 conditions per place. [2024-06-14 13:52:46,804 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 336 selfloop transitions, 22 changer transitions 0/364 dead transitions. [2024-06-14 13:52:46,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 364 transitions, 6343 flow [2024-06-14 13:52:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 13:52:46,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:52:46,806 INFO L175 Difference]: Start difference. First operand has 234 places, 345 transitions, 5533 flow. Second operand 6 states and 135 transitions. [2024-06-14 13:52:46,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 364 transitions, 6343 flow [2024-06-14 13:52:47,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 364 transitions, 6101 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:47,242 INFO L231 Difference]: Finished difference. Result has 235 places, 347 transitions, 5396 flow [2024-06-14 13:52:47,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5293, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5396, PETRI_PLACES=235, PETRI_TRANSITIONS=347} [2024-06-14 13:52:47,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 13:52:47,243 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 347 transitions, 5396 flow [2024-06-14 13:52:47,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:47,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:47,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:52:47,244 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 13:52:47,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:47,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1939271777, now seen corresponding path program 3 times [2024-06-14 13:52:47,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:47,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929577597] [2024-06-14 13:52:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:47,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:47,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:47,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929577597] [2024-06-14 13:52:47,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929577597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:47,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:47,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:47,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697612919] [2024-06-14 13:52:47,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:47,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:47,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:47,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:47,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:47,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 347 transitions, 5396 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:47,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:47,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:48,014 INFO L124 PetriNetUnfolderBase]: 2234/3738 cut-off events. [2024-06-14 13:52:48,014 INFO L125 PetriNetUnfolderBase]: For 201608/201608 co-relation queries the response was YES. [2024-06-14 13:52:48,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26296 conditions, 3738 events. 2234/3738 cut-off events. For 201608/201608 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22996 event pairs, 432 based on Foata normal form. 2/3739 useless extension candidates. Maximal degree in co-relation 26183. Up to 3403 conditions per place. [2024-06-14 13:52:48,052 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 340 selfloop transitions, 19 changer transitions 0/365 dead transitions. [2024-06-14 13:52:48,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 365 transitions, 6208 flow [2024-06-14 13:52:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 13:52:48,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-14 13:52:48,054 INFO L175 Difference]: Start difference. First operand has 235 places, 347 transitions, 5396 flow. Second operand 5 states and 118 transitions. [2024-06-14 13:52:48,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 365 transitions, 6208 flow [2024-06-14 13:52:48,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 365 transitions, 6117 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:48,461 INFO L231 Difference]: Finished difference. Result has 236 places, 349 transitions, 5406 flow [2024-06-14 13:52:48,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5406, PETRI_PLACES=236, PETRI_TRANSITIONS=349} [2024-06-14 13:52:48,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-14 13:52:48,462 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 349 transitions, 5406 flow [2024-06-14 13:52:48,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:48,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:48,463 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 13:52:48,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:52:48,463 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 13:52:48,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:48,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1703517881, now seen corresponding path program 4 times [2024-06-14 13:52:48,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:48,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980950449] [2024-06-14 13:52:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:48,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:48,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:48,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980950449] [2024-06-14 13:52:48,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980950449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:48,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:48,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:48,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529907388] [2024-06-14 13:52:48,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:48,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:48,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:48,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:48,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:48,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:48,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 349 transitions, 5406 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:48,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:48,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:48,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:49,237 INFO L124 PetriNetUnfolderBase]: 2229/3731 cut-off events. [2024-06-14 13:52:49,238 INFO L125 PetriNetUnfolderBase]: For 203950/203950 co-relation queries the response was YES. [2024-06-14 13:52:49,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26166 conditions, 3731 events. 2229/3731 cut-off events. For 203950/203950 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 22897 event pairs, 429 based on Foata normal form. 2/3732 useless extension candidates. Maximal degree in co-relation 26052. Up to 3382 conditions per place. [2024-06-14 13:52:49,276 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 340 selfloop transitions, 23 changer transitions 0/369 dead transitions. [2024-06-14 13:52:49,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 369 transitions, 6234 flow [2024-06-14 13:52:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:49,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 13:52:49,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:52:49,278 INFO L175 Difference]: Start difference. First operand has 236 places, 349 transitions, 5406 flow. Second operand 6 states and 136 transitions. [2024-06-14 13:52:49,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 369 transitions, 6234 flow [2024-06-14 13:52:49,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 369 transitions, 6149 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:49,718 INFO L231 Difference]: Finished difference. Result has 239 places, 351 transitions, 5434 flow [2024-06-14 13:52:49,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5321, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5434, PETRI_PLACES=239, PETRI_TRANSITIONS=351} [2024-06-14 13:52:49,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 13:52:49,719 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 351 transitions, 5434 flow [2024-06-14 13:52:49,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:49,720 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 13:52:49,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:52:49,720 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 13:52:49,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:49,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1970058095, now seen corresponding path program 1 times [2024-06-14 13:52:49,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:49,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675564949] [2024-06-14 13:52:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:49,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:49,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:49,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675564949] [2024-06-14 13:52:49,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675564949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:49,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:49,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:49,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005567895] [2024-06-14 13:52:49,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:49,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:49,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:49,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:49,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:49,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 351 transitions, 5434 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:49,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:49,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:50,528 INFO L124 PetriNetUnfolderBase]: 2332/3880 cut-off events. [2024-06-14 13:52:50,528 INFO L125 PetriNetUnfolderBase]: For 249837/249845 co-relation queries the response was YES. [2024-06-14 13:52:50,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27542 conditions, 3880 events. 2332/3880 cut-off events. For 249837/249845 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 23896 event pairs, 415 based on Foata normal form. 15/3890 useless extension candidates. Maximal degree in co-relation 27427. Up to 2990 conditions per place. [2024-06-14 13:52:50,570 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 115 changer transitions 0/387 dead transitions. [2024-06-14 13:52:50,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 387 transitions, 6630 flow [2024-06-14 13:52:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 13:52:50,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-14 13:52:50,571 INFO L175 Difference]: Start difference. First operand has 239 places, 351 transitions, 5434 flow. Second operand 7 states and 174 transitions. [2024-06-14 13:52:50,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 387 transitions, 6630 flow [2024-06-14 13:52:51,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 387 transitions, 6533 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:51,017 INFO L231 Difference]: Finished difference. Result has 242 places, 357 transitions, 5679 flow [2024-06-14 13:52:51,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5337, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5679, PETRI_PLACES=242, PETRI_TRANSITIONS=357} [2024-06-14 13:52:51,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 13:52:51,018 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 357 transitions, 5679 flow [2024-06-14 13:52:51,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:51,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:51,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:51,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:52:51,019 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 13:52:51,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:51,019 INFO L85 PathProgramCache]: Analyzing trace with hash -406261841, now seen corresponding path program 2 times [2024-06-14 13:52:51,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:51,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408019161] [2024-06-14 13:52:51,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:51,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:51,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:51,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408019161] [2024-06-14 13:52:51,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408019161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:51,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:51,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:51,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015606092] [2024-06-14 13:52:51,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:51,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:51,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:51,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:51,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:51,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:51,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 357 transitions, 5679 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:51,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:51,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:51,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:51,829 INFO L124 PetriNetUnfolderBase]: 2376/3951 cut-off events. [2024-06-14 13:52:51,829 INFO L125 PetriNetUnfolderBase]: For 259741/259749 co-relation queries the response was YES. [2024-06-14 13:52:51,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28470 conditions, 3951 events. 2376/3951 cut-off events. For 259741/259749 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 24383 event pairs, 501 based on Foata normal form. 15/3961 useless extension candidates. Maximal degree in co-relation 28354. Up to 3296 conditions per place. [2024-06-14 13:52:51,872 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 110 changer transitions 0/382 dead transitions. [2024-06-14 13:52:51,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 382 transitions, 6673 flow [2024-06-14 13:52:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:52:51,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 13:52:51,874 INFO L175 Difference]: Start difference. First operand has 242 places, 357 transitions, 5679 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:52:51,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 382 transitions, 6673 flow [2024-06-14 13:52:52,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 382 transitions, 6457 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:52,372 INFO L231 Difference]: Finished difference. Result has 246 places, 360 transitions, 5752 flow [2024-06-14 13:52:52,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5477, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5752, PETRI_PLACES=246, PETRI_TRANSITIONS=360} [2024-06-14 13:52:52,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 13:52:52,373 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 360 transitions, 5752 flow [2024-06-14 13:52:52,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:52,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:52,373 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 13:52:52,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:52:52,374 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 13:52:52,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash -290970671, now seen corresponding path program 3 times [2024-06-14 13:52:52,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:52,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779680180] [2024-06-14 13:52:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:52,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:52,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:52,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779680180] [2024-06-14 13:52:52,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779680180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:52,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:52,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:52,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080175328] [2024-06-14 13:52:52,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:52,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:52,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:52,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 360 transitions, 5752 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:52,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:52,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:52,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:53,221 INFO L124 PetriNetUnfolderBase]: 2448/4074 cut-off events. [2024-06-14 13:52:53,222 INFO L125 PetriNetUnfolderBase]: For 281121/281121 co-relation queries the response was YES. [2024-06-14 13:52:53,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29399 conditions, 4074 events. 2448/4074 cut-off events. For 281121/281121 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25259 event pairs, 468 based on Foata normal form. 20/4093 useless extension candidates. Maximal degree in co-relation 29281. Up to 3637 conditions per place. [2024-06-14 13:52:53,267 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 42 changer transitions 0/385 dead transitions. [2024-06-14 13:52:53,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 385 transitions, 6678 flow [2024-06-14 13:52:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 13:52:53,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-14 13:52:53,268 INFO L175 Difference]: Start difference. First operand has 246 places, 360 transitions, 5752 flow. Second operand 8 states and 175 transitions. [2024-06-14 13:52:53,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 385 transitions, 6678 flow [2024-06-14 13:52:53,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 385 transitions, 6433 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:53,773 INFO L231 Difference]: Finished difference. Result has 249 places, 365 transitions, 5707 flow [2024-06-14 13:52:53,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5509, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5707, PETRI_PLACES=249, PETRI_TRANSITIONS=365} [2024-06-14 13:52:53,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-14 13:52:53,773 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 365 transitions, 5707 flow [2024-06-14 13:52:53,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:53,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:53,774 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 13:52:53,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:52:53,774 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 13:52:53,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash -290785973, now seen corresponding path program 1 times [2024-06-14 13:52:53,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:53,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644117969] [2024-06-14 13:52:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:53,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:53,969 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 13:52:53,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:53,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644117969] [2024-06-14 13:52:53,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644117969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:53,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:53,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:53,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989145938] [2024-06-14 13:52:53,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:53,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:53,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:53,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:53,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:54,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:54,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 365 transitions, 5707 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:54,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:54,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:54,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:54,574 INFO L124 PetriNetUnfolderBase]: 2456/4088 cut-off events. [2024-06-14 13:52:54,574 INFO L125 PetriNetUnfolderBase]: For 253357/253357 co-relation queries the response was YES. [2024-06-14 13:52:54,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29431 conditions, 4088 events. 2456/4088 cut-off events. For 253357/253357 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25404 event pairs, 468 based on Foata normal form. 2/4089 useless extension candidates. Maximal degree in co-relation 29312. Up to 3743 conditions per place. [2024-06-14 13:52:54,618 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 353 selfloop transitions, 24 changer transitions 0/383 dead transitions. [2024-06-14 13:52:54,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 383 transitions, 6543 flow [2024-06-14 13:52:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 13:52:54,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-14 13:52:54,620 INFO L175 Difference]: Start difference. First operand has 249 places, 365 transitions, 5707 flow. Second operand 7 states and 149 transitions. [2024-06-14 13:52:54,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 383 transitions, 6543 flow [2024-06-14 13:52:55,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 383 transitions, 6409 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:55,137 INFO L231 Difference]: Finished difference. Result has 251 places, 368 transitions, 5682 flow [2024-06-14 13:52:55,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5573, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5682, PETRI_PLACES=251, PETRI_TRANSITIONS=368} [2024-06-14 13:52:55,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-14 13:52:55,138 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 368 transitions, 5682 flow [2024-06-14 13:52:55,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:55,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:55,139 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 13:52:55,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:52:55,139 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 13:52:55,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:55,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1940168657, now seen corresponding path program 4 times [2024-06-14 13:52:55,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:55,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600980816] [2024-06-14 13:52:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:55,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:55,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:55,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600980816] [2024-06-14 13:52:55,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600980816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:55,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:55,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:55,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895800274] [2024-06-14 13:52:55,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:55,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:55,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:55,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:55,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:55,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:55,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 368 transitions, 5682 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:55,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:55,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:55,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:56,109 INFO L124 PetriNetUnfolderBase]: 2619/4353 cut-off events. [2024-06-14 13:52:56,109 INFO L125 PetriNetUnfolderBase]: For 364882/364882 co-relation queries the response was YES. [2024-06-14 13:52:56,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30418 conditions, 4353 events. 2619/4353 cut-off events. For 364882/364882 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 27286 event pairs, 433 based on Foata normal form. 54/4406 useless extension candidates. Maximal degree in co-relation 30297. Up to 3307 conditions per place. [2024-06-14 13:52:56,160 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 286 selfloop transitions, 116 changer transitions 1/409 dead transitions. [2024-06-14 13:52:56,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 409 transitions, 6818 flow [2024-06-14 13:52:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 13:52:56,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-14 13:52:56,161 INFO L175 Difference]: Start difference. First operand has 251 places, 368 transitions, 5682 flow. Second operand 8 states and 202 transitions. [2024-06-14 13:52:56,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 409 transitions, 6818 flow [2024-06-14 13:52:57,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 409 transitions, 6735 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:57,025 INFO L231 Difference]: Finished difference. Result has 254 places, 371 transitions, 5932 flow [2024-06-14 13:52:57,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5932, PETRI_PLACES=254, PETRI_TRANSITIONS=371} [2024-06-14 13:52:57,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 13:52:57,026 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 371 transitions, 5932 flow [2024-06-14 13:52:57,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:57,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:57,026 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 13:52:57,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:52:57,027 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 13:52:57,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:57,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1939983959, now seen corresponding path program 2 times [2024-06-14 13:52:57,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:57,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930086156] [2024-06-14 13:52:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:57,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:57,228 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 13:52:57,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:57,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930086156] [2024-06-14 13:52:57,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930086156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:57,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:57,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:57,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98231932] [2024-06-14 13:52:57,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:57,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:57,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:57,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:57,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:57,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:57,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 371 transitions, 5932 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:57,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:57,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:57,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:57,900 INFO L124 PetriNetUnfolderBase]: 2622/4358 cut-off events. [2024-06-14 13:52:57,901 INFO L125 PetriNetUnfolderBase]: For 268244/268244 co-relation queries the response was YES. [2024-06-14 13:52:57,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31287 conditions, 4358 events. 2622/4358 cut-off events. For 268244/268244 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 27290 event pairs, 515 based on Foata normal form. 2/4359 useless extension candidates. Maximal degree in co-relation 31165. Up to 4006 conditions per place. [2024-06-14 13:52:57,949 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 355 selfloop transitions, 29 changer transitions 0/390 dead transitions. [2024-06-14 13:52:57,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 390 transitions, 6827 flow [2024-06-14 13:52:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 13:52:57,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:52:57,950 INFO L175 Difference]: Start difference. First operand has 254 places, 371 transitions, 5932 flow. Second operand 6 states and 132 transitions. [2024-06-14 13:52:57,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 390 transitions, 6827 flow [2024-06-14 13:52:58,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 390 transitions, 6547 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:58,483 INFO L231 Difference]: Finished difference. Result has 254 places, 376 transitions, 5815 flow [2024-06-14 13:52:58,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5815, PETRI_PLACES=254, PETRI_TRANSITIONS=376} [2024-06-14 13:52:58,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 13:52:58,484 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 376 transitions, 5815 flow [2024-06-14 13:52:58,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:58,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:58,485 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 13:52:58,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:52:58,485 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 13:52:58,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:58,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1712082809, now seen corresponding path program 3 times [2024-06-14 13:52:58,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:58,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981367613] [2024-06-14 13:52:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:58,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:58,678 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 13:52:58,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:58,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981367613] [2024-06-14 13:52:58,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981367613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:58,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:58,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:58,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385554698] [2024-06-14 13:52:58,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:58,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:58,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:58,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:58,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:58,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:58,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 376 transitions, 5815 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:58,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:58,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:58,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:59,441 INFO L124 PetriNetUnfolderBase]: 2630/4370 cut-off events. [2024-06-14 13:52:59,441 INFO L125 PetriNetUnfolderBase]: For 264405/264405 co-relation queries the response was YES. [2024-06-14 13:52:59,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30659 conditions, 4370 events. 2630/4370 cut-off events. For 264405/264405 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27366 event pairs, 517 based on Foata normal form. 2/4371 useless extension candidates. Maximal degree in co-relation 30536. Up to 4012 conditions per place. [2024-06-14 13:52:59,489 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 356 selfloop transitions, 29 changer transitions 0/391 dead transitions. [2024-06-14 13:52:59,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 391 transitions, 6659 flow [2024-06-14 13:52:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-14 13:52:59,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:52:59,491 INFO L175 Difference]: Start difference. First operand has 254 places, 376 transitions, 5815 flow. Second operand 5 states and 115 transitions. [2024-06-14 13:52:59,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 391 transitions, 6659 flow [2024-06-14 13:53:00,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 391 transitions, 6585 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:00,085 INFO L231 Difference]: Finished difference. Result has 257 places, 378 transitions, 5856 flow [2024-06-14 13:53:00,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5745, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5856, PETRI_PLACES=257, PETRI_TRANSITIONS=378} [2024-06-14 13:53:00,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-14 13:53:00,086 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 378 transitions, 5856 flow [2024-06-14 13:53:00,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:00,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:00,087 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 13:53:00,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:53:00,087 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 13:53:00,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:00,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1703511929, now seen corresponding path program 4 times [2024-06-14 13:53:00,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:00,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756116794] [2024-06-14 13:53:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:00,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:00,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:00,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756116794] [2024-06-14 13:53:00,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756116794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:00,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:00,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304717813] [2024-06-14 13:53:00,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:00,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:00,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:00,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:00,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:00,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 378 transitions, 5856 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:00,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:00,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:00,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:00,968 INFO L124 PetriNetUnfolderBase]: 2625/4356 cut-off events. [2024-06-14 13:53:00,968 INFO L125 PetriNetUnfolderBase]: For 260289/260291 co-relation queries the response was YES. [2024-06-14 13:53:01,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30444 conditions, 4356 events. 2625/4356 cut-off events. For 260289/260291 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27202 event pairs, 521 based on Foata normal form. 4/4359 useless extension candidates. Maximal degree in co-relation 30320. Up to 3991 conditions per place. [2024-06-14 13:53:01,024 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 355 selfloop transitions, 30 changer transitions 0/391 dead transitions. [2024-06-14 13:53:01,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 391 transitions, 6694 flow [2024-06-14 13:53:01,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-14 13:53:01,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-14 13:53:01,026 INFO L175 Difference]: Start difference. First operand has 257 places, 378 transitions, 5856 flow. Second operand 5 states and 112 transitions. [2024-06-14 13:53:01,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 391 transitions, 6694 flow [2024-06-14 13:53:01,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 391 transitions, 6605 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:01,671 INFO L231 Difference]: Finished difference. Result has 259 places, 380 transitions, 5878 flow [2024-06-14 13:53:01,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5771, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5878, PETRI_PLACES=259, PETRI_TRANSITIONS=380} [2024-06-14 13:53:01,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-14 13:53:01,672 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 380 transitions, 5878 flow [2024-06-14 13:53:01,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:01,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:01,672 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 13:53:01,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:53:01,672 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 13:53:01,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:01,673 INFO L85 PathProgramCache]: Analyzing trace with hash -617285971, now seen corresponding path program 1 times [2024-06-14 13:53:01,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:01,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561143281] [2024-06-14 13:53:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:01,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:01,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:01,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561143281] [2024-06-14 13:53:01,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561143281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:01,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:01,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:01,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476295750] [2024-06-14 13:53:01,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:01,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:01,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:01,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:01,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:01,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:01,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 380 transitions, 5878 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:01,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:01,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:01,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:02,757 INFO L124 PetriNetUnfolderBase]: 2939/4890 cut-off events. [2024-06-14 13:53:02,758 INFO L125 PetriNetUnfolderBase]: For 419969/419969 co-relation queries the response was YES. [2024-06-14 13:53:02,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35370 conditions, 4890 events. 2939/4890 cut-off events. For 419969/419969 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31131 event pairs, 589 based on Foata normal form. 36/4921 useless extension candidates. Maximal degree in co-relation 35245. Up to 2682 conditions per place. [2024-06-14 13:53:02,816 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 232 changer transitions 7/431 dead transitions. [2024-06-14 13:53:02,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 431 transitions, 7520 flow [2024-06-14 13:53:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 13:53:02,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-14 13:53:02,817 INFO L175 Difference]: Start difference. First operand has 259 places, 380 transitions, 5878 flow. Second operand 8 states and 209 transitions. [2024-06-14 13:53:02,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 431 transitions, 7520 flow [2024-06-14 13:53:03,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 431 transitions, 7429 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:03,621 INFO L231 Difference]: Finished difference. Result has 264 places, 383 transitions, 6338 flow [2024-06-14 13:53:03,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6338, PETRI_PLACES=264, PETRI_TRANSITIONS=383} [2024-06-14 13:53:03,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-14 13:53:03,622 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 383 transitions, 6338 flow [2024-06-14 13:53:03,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:03,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:03,622 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 13:53:03,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:53:03,623 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 13:53:03,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:03,623 INFO L85 PathProgramCache]: Analyzing trace with hash -351588691, now seen corresponding path program 2 times [2024-06-14 13:53:03,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:03,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183155630] [2024-06-14 13:53:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:03,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:03,947 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 13:53:03,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:03,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183155630] [2024-06-14 13:53:03,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183155630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:03,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:03,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:03,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154483803] [2024-06-14 13:53:03,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:03,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:03,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:03,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:03,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:04,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:04,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 383 transitions, 6338 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:04,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:04,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:04,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:05,372 INFO L124 PetriNetUnfolderBase]: 3216/5341 cut-off events. [2024-06-14 13:53:05,373 INFO L125 PetriNetUnfolderBase]: For 535782/535782 co-relation queries the response was YES. [2024-06-14 13:53:05,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41366 conditions, 5341 events. 3216/5341 cut-off events. For 535782/535782 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 34530 event pairs, 831 based on Foata normal form. 36/5372 useless extension candidates. Maximal degree in co-relation 41240. Up to 3825 conditions per place. [2024-06-14 13:53:05,454 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 221 changer transitions 4/427 dead transitions. [2024-06-14 13:53:05,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 427 transitions, 7960 flow [2024-06-14 13:53:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:05,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 13:53:05,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 13:53:05,456 INFO L175 Difference]: Start difference. First operand has 264 places, 383 transitions, 6338 flow. Second operand 8 states and 204 transitions. [2024-06-14 13:53:05,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 427 transitions, 7960 flow [2024-06-14 13:53:06,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 427 transitions, 7610 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:06,493 INFO L231 Difference]: Finished difference. Result has 268 places, 386 transitions, 6540 flow [2024-06-14 13:53:06,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5996, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6540, PETRI_PLACES=268, PETRI_TRANSITIONS=386} [2024-06-14 13:53:06,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-14 13:53:06,496 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 386 transitions, 6540 flow [2024-06-14 13:53:06,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:06,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:06,497 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 13:53:06,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:53:06,497 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 13:53:06,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:06,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1146879087, now seen corresponding path program 3 times [2024-06-14 13:53:06,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:06,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660277075] [2024-06-14 13:53:06,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:06,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:06,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:06,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660277075] [2024-06-14 13:53:06,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660277075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:06,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:06,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:06,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300369038] [2024-06-14 13:53:06,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:06,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:06,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:06,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:06,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 386 transitions, 6540 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:06,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:06,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:06,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:07,675 INFO L124 PetriNetUnfolderBase]: 3099/5162 cut-off events. [2024-06-14 13:53:07,676 INFO L125 PetriNetUnfolderBase]: For 469387/469387 co-relation queries the response was YES. [2024-06-14 13:53:07,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38268 conditions, 5162 events. 3099/5162 cut-off events. For 469387/469387 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33297 event pairs, 828 based on Foata normal form. 42/5199 useless extension candidates. Maximal degree in co-relation 38140. Up to 3987 conditions per place. [2024-06-14 13:53:07,742 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 216 changer transitions 3/419 dead transitions. [2024-06-14 13:53:07,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 419 transitions, 7868 flow [2024-06-14 13:53:07,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:53:07,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-14 13:53:07,743 INFO L175 Difference]: Start difference. First operand has 268 places, 386 transitions, 6540 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:53:07,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 419 transitions, 7868 flow [2024-06-14 13:53:08,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 419 transitions, 7511 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:08,708 INFO L231 Difference]: Finished difference. Result has 272 places, 385 transitions, 6612 flow [2024-06-14 13:53:08,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6612, PETRI_PLACES=272, PETRI_TRANSITIONS=385} [2024-06-14 13:53:08,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-14 13:53:08,709 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 385 transitions, 6612 flow [2024-06-14 13:53:08,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:08,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:08,709 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 13:53:08,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:53:08,709 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 13:53:08,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:08,710 INFO L85 PathProgramCache]: Analyzing trace with hash -610793409, now seen corresponding path program 1 times [2024-06-14 13:53:08,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:08,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768401107] [2024-06-14 13:53:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:08,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:08,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:08,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768401107] [2024-06-14 13:53:08,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768401107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:08,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:08,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:08,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26071717] [2024-06-14 13:53:08,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:08,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:08,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:08,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:08,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:08,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 385 transitions, 6612 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:08,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:08,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:08,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:09,758 INFO L124 PetriNetUnfolderBase]: 3118/5211 cut-off events. [2024-06-14 13:53:09,759 INFO L125 PetriNetUnfolderBase]: For 393002/393012 co-relation queries the response was YES. [2024-06-14 13:53:09,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39182 conditions, 5211 events. 3118/5211 cut-off events. For 393002/393012 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 33854 event pairs, 831 based on Foata normal form. 6/5215 useless extension candidates. Maximal degree in co-relation 39052. Up to 4538 conditions per place. [2024-06-14 13:53:09,822 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 104 changer transitions 0/416 dead transitions. [2024-06-14 13:53:09,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 416 transitions, 8128 flow [2024-06-14 13:53:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 13:53:09,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 13:53:09,823 INFO L175 Difference]: Start difference. First operand has 272 places, 385 transitions, 6612 flow. Second operand 6 states and 143 transitions. [2024-06-14 13:53:09,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 416 transitions, 8128 flow [2024-06-14 13:53:10,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 416 transitions, 7672 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:10,751 INFO L231 Difference]: Finished difference. Result has 271 places, 397 transitions, 6612 flow [2024-06-14 13:53:10,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6612, PETRI_PLACES=271, PETRI_TRANSITIONS=397} [2024-06-14 13:53:10,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-14 13:53:10,752 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 397 transitions, 6612 flow [2024-06-14 13:53:10,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:10,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:10,752 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] [2024-06-14 13:53:10,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:53:10,752 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 13:53:10,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:10,753 INFO L85 PathProgramCache]: Analyzing trace with hash -198502095, now seen corresponding path program 2 times [2024-06-14 13:53:10,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:10,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305420330] [2024-06-14 13:53:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:10,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:10,950 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 13:53:10,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:10,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305420330] [2024-06-14 13:53:10,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305420330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:10,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:10,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:10,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770489571] [2024-06-14 13:53:10,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:10,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:10,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:10,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:10,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 397 transitions, 6612 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:10,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:10,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:10,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:12,086 INFO L124 PetriNetUnfolderBase]: 3115/5194 cut-off events. [2024-06-14 13:53:12,086 INFO L125 PetriNetUnfolderBase]: For 397662/397662 co-relation queries the response was YES. [2024-06-14 13:53:12,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38749 conditions, 5194 events. 3115/5194 cut-off events. For 397662/397662 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 33625 event pairs, 793 based on Foata normal form. 1/5191 useless extension candidates. Maximal degree in co-relation 38618. Up to 4535 conditions per place. [2024-06-14 13:53:12,158 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 301 selfloop transitions, 123 changer transitions 0/430 dead transitions. [2024-06-14 13:53:12,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 430 transitions, 7956 flow [2024-06-14 13:53:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-14 13:53:12,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:53:12,160 INFO L175 Difference]: Start difference. First operand has 271 places, 397 transitions, 6612 flow. Second operand 9 states and 207 transitions. [2024-06-14 13:53:12,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 430 transitions, 7956 flow [2024-06-14 13:53:13,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 430 transitions, 7810 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:13,196 INFO L231 Difference]: Finished difference. Result has 278 places, 397 transitions, 6718 flow [2024-06-14 13:53:13,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6466, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6718, PETRI_PLACES=278, PETRI_TRANSITIONS=397} [2024-06-14 13:53:13,197 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-14 13:53:13,197 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 397 transitions, 6718 flow [2024-06-14 13:53:13,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:13,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:13,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:13,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:53:13,197 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 13:53:13,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash 248572181, now seen corresponding path program 3 times [2024-06-14 13:53:13,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:13,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448404492] [2024-06-14 13:53:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:13,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:13,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:13,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448404492] [2024-06-14 13:53:13,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448404492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:13,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:13,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:13,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210959902] [2024-06-14 13:53:13,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:13,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:13,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:13,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:13,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:13,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:13,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 397 transitions, 6718 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:13,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:13,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:13,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:14,260 INFO L124 PetriNetUnfolderBase]: 3120/5199 cut-off events. [2024-06-14 13:53:14,260 INFO L125 PetriNetUnfolderBase]: For 410064/410064 co-relation queries the response was YES. [2024-06-14 13:53:14,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39097 conditions, 5199 events. 3120/5199 cut-off events. For 410064/410064 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33717 event pairs, 807 based on Foata normal form. 1/5195 useless extension candidates. Maximal degree in co-relation 38964. Up to 4541 conditions per place. [2024-06-14 13:53:14,322 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 118 changer transitions 0/425 dead transitions. [2024-06-14 13:53:14,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 425 transitions, 7951 flow [2024-06-14 13:53:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:53:14,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 13:53:14,324 INFO L175 Difference]: Start difference. First operand has 278 places, 397 transitions, 6718 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:53:14,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 425 transitions, 7951 flow [2024-06-14 13:53:15,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 425 transitions, 7560 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:15,900 INFO L231 Difference]: Finished difference. Result has 277 places, 400 transitions, 6622 flow [2024-06-14 13:53:15,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6339, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6622, PETRI_PLACES=277, PETRI_TRANSITIONS=400} [2024-06-14 13:53:15,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-14 13:53:15,901 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 400 transitions, 6622 flow [2024-06-14 13:53:15,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:15,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:15,901 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 13:53:15,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:53:15,902 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 13:53:15,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash -576331329, now seen corresponding path program 4 times [2024-06-14 13:53:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:15,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557328839] [2024-06-14 13:53:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:15,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:16,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:16,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557328839] [2024-06-14 13:53:16,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557328839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:16,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:16,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:16,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79343634] [2024-06-14 13:53:16,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:16,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:16,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:16,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:16,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 400 transitions, 6622 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:16,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:16,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:16,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:16,995 INFO L124 PetriNetUnfolderBase]: 3117/5213 cut-off events. [2024-06-14 13:53:16,995 INFO L125 PetriNetUnfolderBase]: For 416519/416529 co-relation queries the response was YES. [2024-06-14 13:53:17,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39033 conditions, 5213 events. 3117/5213 cut-off events. For 416519/416529 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 33910 event pairs, 830 based on Foata normal form. 6/5217 useless extension candidates. Maximal degree in co-relation 38901. Up to 4538 conditions per place. [2024-06-14 13:53:17,058 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 103 changer transitions 0/415 dead transitions. [2024-06-14 13:53:17,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 415 transitions, 7760 flow [2024-06-14 13:53:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 13:53:17,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:53:17,059 INFO L175 Difference]: Start difference. First operand has 277 places, 400 transitions, 6622 flow. Second operand 6 states and 140 transitions. [2024-06-14 13:53:17,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 415 transitions, 7760 flow [2024-06-14 13:53:17,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 415 transitions, 7595 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:17,981 INFO L231 Difference]: Finished difference. Result has 279 places, 400 transitions, 6669 flow [2024-06-14 13:53:17,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6457, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6669, PETRI_PLACES=279, PETRI_TRANSITIONS=400} [2024-06-14 13:53:17,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-14 13:53:17,982 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 400 transitions, 6669 flow [2024-06-14 13:53:17,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:17,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:17,983 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 13:53:17,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:53:17,983 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 13:53:17,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:17,983 INFO L85 PathProgramCache]: Analyzing trace with hash 869953887, now seen corresponding path program 1 times [2024-06-14 13:53:17,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:17,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415026085] [2024-06-14 13:53:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:17,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:18,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:18,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415026085] [2024-06-14 13:53:18,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415026085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:18,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:18,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:18,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893291454] [2024-06-14 13:53:18,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:18,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:18,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:18,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:18,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:18,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:18,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 400 transitions, 6669 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:18,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:18,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:18,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:19,122 INFO L124 PetriNetUnfolderBase]: 3127/5212 cut-off events. [2024-06-14 13:53:19,122 INFO L125 PetriNetUnfolderBase]: For 430416/430416 co-relation queries the response was YES. [2024-06-14 13:53:19,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39296 conditions, 5212 events. 3127/5212 cut-off events. For 430416/430416 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 33786 event pairs, 834 based on Foata normal form. 2/5209 useless extension candidates. Maximal degree in co-relation 39162. Up to 4203 conditions per place. [2024-06-14 13:53:19,181 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 215 changer transitions 0/427 dead transitions. [2024-06-14 13:53:19,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 427 transitions, 7928 flow [2024-06-14 13:53:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:53:19,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:53:19,182 INFO L175 Difference]: Start difference. First operand has 279 places, 400 transitions, 6669 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:53:19,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 427 transitions, 7928 flow [2024-06-14 13:53:20,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 427 transitions, 7722 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:20,354 INFO L231 Difference]: Finished difference. Result has 283 places, 404 transitions, 6975 flow [2024-06-14 13:53:20,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6463, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6975, PETRI_PLACES=283, PETRI_TRANSITIONS=404} [2024-06-14 13:53:20,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-14 13:53:20,355 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 404 transitions, 6975 flow [2024-06-14 13:53:20,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:20,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:20,355 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 13:53:20,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:53:20,356 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 13:53:20,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:20,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1664166153, now seen corresponding path program 2 times [2024-06-14 13:53:20,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:20,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101759834] [2024-06-14 13:53:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:20,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:20,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101759834] [2024-06-14 13:53:20,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101759834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:20,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:20,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:20,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880923] [2024-06-14 13:53:20,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:20,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:20,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:20,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:20,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:20,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 404 transitions, 6975 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:20,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:20,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:20,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:21,743 INFO L124 PetriNetUnfolderBase]: 3137/5230 cut-off events. [2024-06-14 13:53:21,743 INFO L125 PetriNetUnfolderBase]: For 443759/443759 co-relation queries the response was YES. [2024-06-14 13:53:21,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39883 conditions, 5230 events. 3137/5230 cut-off events. For 443759/443759 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33961 event pairs, 832 based on Foata normal form. 2/5227 useless extension candidates. Maximal degree in co-relation 39749. Up to 4213 conditions per place. [2024-06-14 13:53:21,841 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 205 selfloop transitions, 220 changer transitions 0/431 dead transitions. [2024-06-14 13:53:21,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 431 transitions, 8254 flow [2024-06-14 13:53:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 13:53:21,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 13:53:21,842 INFO L175 Difference]: Start difference. First operand has 283 places, 404 transitions, 6975 flow. Second operand 8 states and 189 transitions. [2024-06-14 13:53:21,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 431 transitions, 8254 flow [2024-06-14 13:53:23,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 431 transitions, 7778 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:23,492 INFO L231 Difference]: Finished difference. Result has 285 places, 408 transitions, 7029 flow [2024-06-14 13:53:23,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7029, PETRI_PLACES=285, PETRI_TRANSITIONS=408} [2024-06-14 13:53:23,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-14 13:53:23,493 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 408 transitions, 7029 flow [2024-06-14 13:53:23,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:23,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:23,494 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 13:53:23,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:53:23,494 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 13:53:23,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1784867829, now seen corresponding path program 5 times [2024-06-14 13:53:23,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:23,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719794942] [2024-06-14 13:53:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:23,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:23,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:23,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719794942] [2024-06-14 13:53:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719794942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:23,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:23,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590946761] [2024-06-14 13:53:23,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:23,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:23,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:23,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 408 transitions, 7029 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:23,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:23,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:23,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:24,632 INFO L124 PetriNetUnfolderBase]: 3134/5233 cut-off events. [2024-06-14 13:53:24,633 INFO L125 PetriNetUnfolderBase]: For 448746/448746 co-relation queries the response was YES. [2024-06-14 13:53:24,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39891 conditions, 5233 events. 3134/5233 cut-off events. For 448746/448746 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34079 event pairs, 801 based on Foata normal form. 1/5229 useless extension candidates. Maximal degree in co-relation 39756. Up to 4563 conditions per place. [2024-06-14 13:53:24,699 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 314 selfloop transitions, 108 changer transitions 0/428 dead transitions. [2024-06-14 13:53:24,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 428 transitions, 8365 flow [2024-06-14 13:53:24,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:24,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:53:24,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:53:24,701 INFO L175 Difference]: Start difference. First operand has 285 places, 408 transitions, 7029 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:53:24,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 428 transitions, 8365 flow [2024-06-14 13:53:25,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 428 transitions, 7882 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:25,973 INFO L231 Difference]: Finished difference. Result has 286 places, 408 transitions, 6770 flow [2024-06-14 13:53:25,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6770, PETRI_PLACES=286, PETRI_TRANSITIONS=408} [2024-06-14 13:53:25,974 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-14 13:53:25,974 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 408 transitions, 6770 flow [2024-06-14 13:53:25,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:25,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:25,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:25,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:53:25,975 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 13:53:25,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:25,975 INFO L85 PathProgramCache]: Analyzing trace with hash -243506703, now seen corresponding path program 6 times [2024-06-14 13:53:25,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:25,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222074365] [2024-06-14 13:53:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:25,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:26,252 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 13:53:26,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:26,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222074365] [2024-06-14 13:53:26,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222074365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:26,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:26,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:26,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661891885] [2024-06-14 13:53:26,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:26,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:26,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:26,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:26,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:26,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:26,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 408 transitions, 6770 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:26,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:26,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:26,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:27,157 INFO L124 PetriNetUnfolderBase]: 3131/5227 cut-off events. [2024-06-14 13:53:27,158 INFO L125 PetriNetUnfolderBase]: For 455184/455184 co-relation queries the response was YES. [2024-06-14 13:53:27,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39524 conditions, 5227 events. 3131/5227 cut-off events. For 455184/455184 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33956 event pairs, 801 based on Foata normal form. 1/5223 useless extension candidates. Maximal degree in co-relation 39388. Up to 4560 conditions per place. [2024-06-14 13:53:27,225 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 310 selfloop transitions, 113 changer transitions 0/429 dead transitions. [2024-06-14 13:53:27,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 429 transitions, 7966 flow [2024-06-14 13:53:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 13:53:27,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-14 13:53:27,226 INFO L175 Difference]: Start difference. First operand has 286 places, 408 transitions, 6770 flow. Second operand 9 states and 199 transitions. [2024-06-14 13:53:27,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 429 transitions, 7966 flow [2024-06-14 13:53:28,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 429 transitions, 7778 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:28,386 INFO L231 Difference]: Finished difference. Result has 291 places, 408 transitions, 6814 flow [2024-06-14 13:53:28,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6582, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6814, PETRI_PLACES=291, PETRI_TRANSITIONS=408} [2024-06-14 13:53:28,386 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-14 13:53:28,386 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 408 transitions, 6814 flow [2024-06-14 13:53:28,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:28,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:28,387 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 13:53:28,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:53:28,387 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 13:53:28,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:28,388 INFO L85 PathProgramCache]: Analyzing trace with hash -44193381, now seen corresponding path program 3 times [2024-06-14 13:53:28,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:28,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281637680] [2024-06-14 13:53:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:28,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:28,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281637680] [2024-06-14 13:53:28,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281637680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:28,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:28,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:28,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194504090] [2024-06-14 13:53:28,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:28,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:28,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:28,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:28,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:28,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:28,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 408 transitions, 6814 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:28,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:28,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:28,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:29,532 INFO L124 PetriNetUnfolderBase]: 3141/5237 cut-off events. [2024-06-14 13:53:29,532 INFO L125 PetriNetUnfolderBase]: For 470223/470223 co-relation queries the response was YES. [2024-06-14 13:53:29,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39849 conditions, 5237 events. 3141/5237 cut-off events. For 470223/470223 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 33991 event pairs, 838 based on Foata normal form. 2/5234 useless extension candidates. Maximal degree in co-relation 39712. Up to 4219 conditions per place. [2024-06-14 13:53:29,606 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 208 changer transitions 0/432 dead transitions. [2024-06-14 13:53:29,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 432 transitions, 8095 flow [2024-06-14 13:53:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:53:29,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:53:29,607 INFO L175 Difference]: Start difference. First operand has 291 places, 408 transitions, 6814 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:53:29,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 432 transitions, 8095 flow [2024-06-14 13:53:30,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 432 transitions, 7803 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:30,794 INFO L231 Difference]: Finished difference. Result has 290 places, 412 transitions, 7024 flow [2024-06-14 13:53:30,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7024, PETRI_PLACES=290, PETRI_TRANSITIONS=412} [2024-06-14 13:53:30,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-14 13:53:30,795 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 412 transitions, 7024 flow [2024-06-14 13:53:30,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:30,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:30,796 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 13:53:30,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:53:30,796 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 13:53:30,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:30,796 INFO L85 PathProgramCache]: Analyzing trace with hash 88865033, now seen corresponding path program 4 times [2024-06-14 13:53:30,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:30,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42947713] [2024-06-14 13:53:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:30,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:30,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:30,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42947713] [2024-06-14 13:53:30,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42947713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:30,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:30,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:30,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32055396] [2024-06-14 13:53:30,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:30,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:30,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:31,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:31,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 412 transitions, 7024 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:31,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:31,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:31,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:31,930 INFO L124 PetriNetUnfolderBase]: 3167/5289 cut-off events. [2024-06-14 13:53:31,930 INFO L125 PetriNetUnfolderBase]: For 487983/487983 co-relation queries the response was YES. [2024-06-14 13:53:31,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40855 conditions, 5289 events. 3167/5289 cut-off events. For 487983/487983 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34472 event pairs, 824 based on Foata normal form. 2/5286 useless extension candidates. Maximal degree in co-relation 40718. Up to 4244 conditions per place. [2024-06-14 13:53:31,997 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 220 selfloop transitions, 219 changer transitions 0/445 dead transitions. [2024-06-14 13:53:31,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 445 transitions, 8784 flow [2024-06-14 13:53:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 13:53:31,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-14 13:53:31,998 INFO L175 Difference]: Start difference. First operand has 290 places, 412 transitions, 7024 flow. Second operand 9 states and 208 transitions. [2024-06-14 13:53:31,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 445 transitions, 8784 flow [2024-06-14 13:53:33,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 445 transitions, 8438 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:33,316 INFO L231 Difference]: Finished difference. Result has 294 places, 422 transitions, 7337 flow [2024-06-14 13:53:33,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6686, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7337, PETRI_PLACES=294, PETRI_TRANSITIONS=422} [2024-06-14 13:53:33,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-14 13:53:33,317 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 422 transitions, 7337 flow [2024-06-14 13:53:33,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:33,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:33,317 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 13:53:33,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:53:33,318 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 13:53:33,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:33,318 INFO L85 PathProgramCache]: Analyzing trace with hash 603365557, now seen corresponding path program 5 times [2024-06-14 13:53:33,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:33,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609006770] [2024-06-14 13:53:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:33,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:33,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:33,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609006770] [2024-06-14 13:53:33,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609006770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:33,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:33,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:33,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966431111] [2024-06-14 13:53:33,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:33,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:33,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:33,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:33,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:33,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:33,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 422 transitions, 7337 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:33,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:33,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:33,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:34,481 INFO L124 PetriNetUnfolderBase]: 3177/5302 cut-off events. [2024-06-14 13:53:34,481 INFO L125 PetriNetUnfolderBase]: For 502854/502854 co-relation queries the response was YES. [2024-06-14 13:53:34,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41215 conditions, 5302 events. 3177/5302 cut-off events. For 502854/502854 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34587 event pairs, 838 based on Foata normal form. 2/5299 useless extension candidates. Maximal degree in co-relation 41076. Up to 4254 conditions per place. [2024-06-14 13:53:34,557 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 221 changer transitions 0/450 dead transitions. [2024-06-14 13:53:34,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 450 transitions, 8879 flow [2024-06-14 13:53:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-14 13:53:34,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 13:53:34,559 INFO L175 Difference]: Start difference. First operand has 294 places, 422 transitions, 7337 flow. Second operand 9 states and 205 transitions. [2024-06-14 13:53:34,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 450 transitions, 8879 flow [2024-06-14 13:53:36,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 450 transitions, 8344 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:36,267 INFO L231 Difference]: Finished difference. Result has 298 places, 427 transitions, 7359 flow [2024-06-14 13:53:36,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6837, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7359, PETRI_PLACES=298, PETRI_TRANSITIONS=427} [2024-06-14 13:53:36,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-14 13:53:36,268 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 427 transitions, 7359 flow [2024-06-14 13:53:36,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:36,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:36,268 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] [2024-06-14 13:53:36,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:53:36,269 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 13:53:36,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash -36964863, now seen corresponding path program 4 times [2024-06-14 13:53:36,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:36,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004487160] [2024-06-14 13:53:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:36,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:36,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004487160] [2024-06-14 13:53:36,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004487160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:36,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:36,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:36,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667385909] [2024-06-14 13:53:36,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:36,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:36,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:36,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:36,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:36,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 427 transitions, 7359 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:36,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:36,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:36,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:37,518 INFO L124 PetriNetUnfolderBase]: 3309/5508 cut-off events. [2024-06-14 13:53:37,519 INFO L125 PetriNetUnfolderBase]: For 645596/645596 co-relation queries the response was YES. [2024-06-14 13:53:37,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42038 conditions, 5508 events. 3309/5508 cut-off events. For 645596/645596 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 36118 event pairs, 890 based on Foata normal form. 42/5545 useless extension candidates. Maximal degree in co-relation 41898. Up to 4272 conditions per place. [2024-06-14 13:53:37,595 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 222 changer transitions 3/455 dead transitions. [2024-06-14 13:53:37,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 455 transitions, 8713 flow [2024-06-14 13:53:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:53:37,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 13:53:37,597 INFO L175 Difference]: Start difference. First operand has 298 places, 427 transitions, 7359 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:53:37,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 455 transitions, 8713 flow [2024-06-14 13:53:38,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 455 transitions, 8247 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:38,985 INFO L231 Difference]: Finished difference. Result has 299 places, 428 transitions, 7395 flow [2024-06-14 13:53:38,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6893, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7395, PETRI_PLACES=299, PETRI_TRANSITIONS=428} [2024-06-14 13:53:38,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-14 13:53:38,986 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 428 transitions, 7395 flow [2024-06-14 13:53:38,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:38,986 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 13:53:38,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:53:38,987 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 13:53:38,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:38,987 INFO L85 PathProgramCache]: Analyzing trace with hash -48006753, now seen corresponding path program 5 times [2024-06-14 13:53:38,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:38,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373709501] [2024-06-14 13:53:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:38,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:39,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:39,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373709501] [2024-06-14 13:53:39,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373709501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:39,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:39,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:39,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622925371] [2024-06-14 13:53:39,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:39,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:39,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:39,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:39,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:39,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 428 transitions, 7395 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:39,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:39,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:39,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:40,329 INFO L124 PetriNetUnfolderBase]: 3431/5736 cut-off events. [2024-06-14 13:53:40,329 INFO L125 PetriNetUnfolderBase]: For 659593/659593 co-relation queries the response was YES. [2024-06-14 13:53:40,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43364 conditions, 5736 events. 3431/5736 cut-off events. For 659593/659593 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 38015 event pairs, 950 based on Foata normal form. 42/5773 useless extension candidates. Maximal degree in co-relation 43223. Up to 4474 conditions per place. [2024-06-14 13:53:40,404 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 225 selfloop transitions, 222 changer transitions 3/456 dead transitions. [2024-06-14 13:53:40,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 456 transitions, 8759 flow [2024-06-14 13:53:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 13:53:40,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:53:40,405 INFO L175 Difference]: Start difference. First operand has 299 places, 428 transitions, 7395 flow. Second operand 8 states and 192 transitions. [2024-06-14 13:53:40,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 456 transitions, 8759 flow [2024-06-14 13:53:42,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 456 transitions, 8285 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:42,197 INFO L231 Difference]: Finished difference. Result has 301 places, 429 transitions, 7427 flow [2024-06-14 13:53:42,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6921, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7427, PETRI_PLACES=301, PETRI_TRANSITIONS=429} [2024-06-14 13:53:42,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-14 13:53:42,198 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 429 transitions, 7427 flow [2024-06-14 13:53:42,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:42,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:42,198 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 13:53:42,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:53:42,199 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 13:53:42,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:42,199 INFO L85 PathProgramCache]: Analyzing trace with hash 592191235, now seen corresponding path program 6 times [2024-06-14 13:53:42,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:42,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659586561] [2024-06-14 13:53:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:42,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:42,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:42,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659586561] [2024-06-14 13:53:42,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659586561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:42,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:42,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:42,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223709904] [2024-06-14 13:53:42,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:42,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:42,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:42,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:42,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:42,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:42,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 429 transitions, 7427 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:42,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:42,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:42,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:43,458 INFO L124 PetriNetUnfolderBase]: 3529/5900 cut-off events. [2024-06-14 13:53:43,458 INFO L125 PetriNetUnfolderBase]: For 657993/657993 co-relation queries the response was YES. [2024-06-14 13:53:43,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44177 conditions, 5900 events. 3529/5900 cut-off events. For 657993/657993 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39276 event pairs, 934 based on Foata normal form. 36/5931 useless extension candidates. Maximal degree in co-relation 44035. Up to 4246 conditions per place. [2024-06-14 13:53:43,542 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 227 changer transitions 6/463 dead transitions. [2024-06-14 13:53:43,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 463 transitions, 8847 flow [2024-06-14 13:53:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:53:43,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:53:43,543 INFO L175 Difference]: Start difference. First operand has 301 places, 429 transitions, 7427 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:53:43,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 463 transitions, 8847 flow [2024-06-14 13:53:45,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 463 transitions, 8369 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:45,535 INFO L231 Difference]: Finished difference. Result has 303 places, 430 transitions, 7461 flow [2024-06-14 13:53:45,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6949, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7461, PETRI_PLACES=303, PETRI_TRANSITIONS=430} [2024-06-14 13:53:45,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-14 13:53:45,536 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 430 transitions, 7461 flow [2024-06-14 13:53:45,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:45,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:45,536 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 13:53:45,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:53:45,537 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 13:53:45,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:45,537 INFO L85 PathProgramCache]: Analyzing trace with hash 603642139, now seen corresponding path program 1 times [2024-06-14 13:53:45,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:45,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118088550] [2024-06-14 13:53:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:45,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:45,725 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 13:53:45,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:45,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118088550] [2024-06-14 13:53:45,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118088550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:45,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:45,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253433167] [2024-06-14 13:53:45,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:45,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:45,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:45,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:45,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:45,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:45,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 430 transitions, 7461 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:45,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:45,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:45,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:46,836 INFO L124 PetriNetUnfolderBase]: 3741/6286 cut-off events. [2024-06-14 13:53:46,837 INFO L125 PetriNetUnfolderBase]: For 732345/732345 co-relation queries the response was YES. [2024-06-14 13:53:46,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47838 conditions, 6286 events. 3741/6286 cut-off events. For 732345/732345 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42663 event pairs, 988 based on Foata normal form. 36/6317 useless extension candidates. Maximal degree in co-relation 47695. Up to 4202 conditions per place. [2024-06-14 13:53:46,918 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 220 changer transitions 0/467 dead transitions. [2024-06-14 13:53:46,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 467 transitions, 9109 flow [2024-06-14 13:53:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:53:46,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:53:46,919 INFO L175 Difference]: Start difference. First operand has 303 places, 430 transitions, 7461 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:53:46,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 467 transitions, 9109 flow [2024-06-14 13:53:49,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 467 transitions, 8616 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:49,122 INFO L231 Difference]: Finished difference. Result has 306 places, 434 transitions, 7558 flow [2024-06-14 13:53:49,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6968, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7558, PETRI_PLACES=306, PETRI_TRANSITIONS=434} [2024-06-14 13:53:49,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-14 13:53:49,123 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 434 transitions, 7558 flow [2024-06-14 13:53:49,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:49,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:49,124 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 13:53:49,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:53:49,124 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 13:53:49,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash 751256655, now seen corresponding path program 6 times [2024-06-14 13:53:49,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:49,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7722366] [2024-06-14 13:53:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:49,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:49,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:49,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7722366] [2024-06-14 13:53:49,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7722366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:49,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:49,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:49,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479960903] [2024-06-14 13:53:49,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:49,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:49,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:49,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:49,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:49,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:49,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 434 transitions, 7558 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:49,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:49,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:49,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:50,608 INFO L124 PetriNetUnfolderBase]: 3738/6283 cut-off events. [2024-06-14 13:53:50,609 INFO L125 PetriNetUnfolderBase]: For 632905/632913 co-relation queries the response was YES. [2024-06-14 13:53:50,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47912 conditions, 6283 events. 3738/6283 cut-off events. For 632905/632913 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42875 event pairs, 1068 based on Foata normal form. 4/6282 useless extension candidates. Maximal degree in co-relation 47767. Up to 5188 conditions per place. [2024-06-14 13:53:50,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 244 changer transitions 0/457 dead transitions. [2024-06-14 13:53:50,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 457 transitions, 9202 flow [2024-06-14 13:53:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:53:50,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:53:50,683 INFO L175 Difference]: Start difference. First operand has 306 places, 434 transitions, 7558 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:53:50,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 457 transitions, 9202 flow [2024-06-14 13:53:52,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 457 transitions, 8881 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:52,298 INFO L231 Difference]: Finished difference. Result has 310 places, 435 transitions, 7757 flow [2024-06-14 13:53:52,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7237, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7757, PETRI_PLACES=310, PETRI_TRANSITIONS=435} [2024-06-14 13:53:52,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-14 13:53:52,299 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 435 transitions, 7757 flow [2024-06-14 13:53:52,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:52,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:52,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:52,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:53:52,300 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 13:53:52,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1464969627, now seen corresponding path program 7 times [2024-06-14 13:53:52,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:52,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129885350] [2024-06-14 13:53:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:52,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:52,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129885350] [2024-06-14 13:53:52,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129885350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:52,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:52,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:52,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24667282] [2024-06-14 13:53:52,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:52,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:52,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:52,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:52,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 435 transitions, 7757 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:52,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:52,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:52,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:53,639 INFO L124 PetriNetUnfolderBase]: 3735/6277 cut-off events. [2024-06-14 13:53:53,639 INFO L125 PetriNetUnfolderBase]: For 638201/638209 co-relation queries the response was YES. [2024-06-14 13:53:53,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48081 conditions, 6277 events. 3735/6277 cut-off events. For 638201/638209 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42800 event pairs, 1068 based on Foata normal form. 4/6276 useless extension candidates. Maximal degree in co-relation 47934. Up to 5186 conditions per place. [2024-06-14 13:53:53,724 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 244 changer transitions 0/456 dead transitions. [2024-06-14 13:53:53,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 456 transitions, 9211 flow [2024-06-14 13:53:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:53:53,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:53:53,725 INFO L175 Difference]: Start difference. First operand has 310 places, 435 transitions, 7757 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:53:53,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 456 transitions, 9211 flow [2024-06-14 13:53:55,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 456 transitions, 8584 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:55,273 INFO L231 Difference]: Finished difference. Result has 312 places, 435 transitions, 7624 flow [2024-06-14 13:53:55,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7130, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7624, PETRI_PLACES=312, PETRI_TRANSITIONS=435} [2024-06-14 13:53:55,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-14 13:53:55,274 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 435 transitions, 7624 flow [2024-06-14 13:53:55,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:55,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:55,274 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 13:53:55,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:53:55,275 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 13:53:55,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:55,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1634032055, now seen corresponding path program 8 times [2024-06-14 13:53:55,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:55,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827204384] [2024-06-14 13:53:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:55,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:55,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:55,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827204384] [2024-06-14 13:53:55,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827204384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:55,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:55,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:55,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178843475] [2024-06-14 13:53:55,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:55,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:55,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:55,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:55,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:55,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:55,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 435 transitions, 7624 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:55,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:55,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:55,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:56,647 INFO L124 PetriNetUnfolderBase]: 3740/6284 cut-off events. [2024-06-14 13:53:56,648 INFO L125 PetriNetUnfolderBase]: For 650933/650941 co-relation queries the response was YES. [2024-06-14 13:53:56,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48204 conditions, 6284 events. 3740/6284 cut-off events. For 650933/650941 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 42879 event pairs, 1068 based on Foata normal form. 4/6283 useless extension candidates. Maximal degree in co-relation 48056. Up to 5190 conditions per place. [2024-06-14 13:53:56,733 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 257 changer transitions 0/459 dead transitions. [2024-06-14 13:53:56,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 459 transitions, 9157 flow [2024-06-14 13:53:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:53:56,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:53:56,734 INFO L175 Difference]: Start difference. First operand has 312 places, 435 transitions, 7624 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:53:56,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 459 transitions, 9157 flow [2024-06-14 13:53:58,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 459 transitions, 8657 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:58,561 INFO L231 Difference]: Finished difference. Result has 313 places, 438 transitions, 7711 flow [2024-06-14 13:53:58,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7130, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7711, PETRI_PLACES=313, PETRI_TRANSITIONS=438} [2024-06-14 13:53:58,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-14 13:53:58,562 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 438 transitions, 7711 flow [2024-06-14 13:53:58,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:58,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:58,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:53:58,562 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 13:53:58,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash 453798465, now seen corresponding path program 7 times [2024-06-14 13:53:58,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:58,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284522727] [2024-06-14 13:53:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:58,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:58,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:58,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284522727] [2024-06-14 13:53:58,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284522727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:58,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:58,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:58,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594608303] [2024-06-14 13:53:58,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:58,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:58,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:58,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:58,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:58,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:58,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 438 transitions, 7711 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:58,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:58,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:59,859 INFO L124 PetriNetUnfolderBase]: 3737/6316 cut-off events. [2024-06-14 13:53:59,859 INFO L125 PetriNetUnfolderBase]: For 660602/660612 co-relation queries the response was YES. [2024-06-14 13:53:59,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48334 conditions, 6316 events. 3737/6316 cut-off events. For 660602/660612 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43375 event pairs, 1092 based on Foata normal form. 6/6320 useless extension candidates. Maximal degree in co-relation 48185. Up to 5556 conditions per place. [2024-06-14 13:53:59,941 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 345 selfloop transitions, 102 changer transitions 0/453 dead transitions. [2024-06-14 13:53:59,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 453 transitions, 8813 flow [2024-06-14 13:53:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 13:53:59,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 13:53:59,942 INFO L175 Difference]: Start difference. First operand has 313 places, 438 transitions, 7711 flow. Second operand 7 states and 156 transitions. [2024-06-14 13:53:59,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 453 transitions, 8813 flow [2024-06-14 13:54:02,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 453 transitions, 8380 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:02,180 INFO L231 Difference]: Finished difference. Result has 315 places, 438 transitions, 7488 flow [2024-06-14 13:54:02,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7278, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7488, PETRI_PLACES=315, PETRI_TRANSITIONS=438} [2024-06-14 13:54:02,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-14 13:54:02,181 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 438 transitions, 7488 flow [2024-06-14 13:54:02,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:02,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:02,181 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 13:54:02,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:54:02,181 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 13:54:02,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash -483414125, now seen corresponding path program 9 times [2024-06-14 13:54:02,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:02,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120204294] [2024-06-14 13:54:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:02,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:02,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:02,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120204294] [2024-06-14 13:54:02,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120204294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:02,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:02,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:02,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886730219] [2024-06-14 13:54:02,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:02,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:02,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:02,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:02,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:02,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:02,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 438 transitions, 7488 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:02,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:02,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:02,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:03,506 INFO L124 PetriNetUnfolderBase]: 3734/6284 cut-off events. [2024-06-14 13:54:03,507 INFO L125 PetriNetUnfolderBase]: For 669022/669030 co-relation queries the response was YES. [2024-06-14 13:54:03,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47893 conditions, 6284 events. 3734/6284 cut-off events. For 669022/669030 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42949 event pairs, 1079 based on Foata normal form. 4/6283 useless extension candidates. Maximal degree in co-relation 47743. Up to 5186 conditions per place. [2024-06-14 13:54:03,592 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 257 changer transitions 0/459 dead transitions. [2024-06-14 13:54:03,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 459 transitions, 8966 flow [2024-06-14 13:54:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:54:03,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:54:03,594 INFO L175 Difference]: Start difference. First operand has 315 places, 438 transitions, 7488 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:54:03,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 459 transitions, 8966 flow [2024-06-14 13:54:05,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 459 transitions, 8802 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:54:05,749 INFO L231 Difference]: Finished difference. Result has 319 places, 438 transitions, 7844 flow [2024-06-14 13:54:05,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7324, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7844, PETRI_PLACES=319, PETRI_TRANSITIONS=438} [2024-06-14 13:54:05,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-14 13:54:05,750 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 438 transitions, 7844 flow [2024-06-14 13:54:05,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:05,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:05,750 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 13:54:05,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:54:05,751 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 13:54:05,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:05,751 INFO L85 PathProgramCache]: Analyzing trace with hash 893141087, now seen corresponding path program 8 times [2024-06-14 13:54:05,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:05,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054496972] [2024-06-14 13:54:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:05,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:05,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:05,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054496972] [2024-06-14 13:54:05,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054496972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:05,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:05,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:54:05,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22347131] [2024-06-14 13:54:05,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:05,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:54:05,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:54:05,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:54:05,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:05,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 438 transitions, 7844 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:05,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:05,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:05,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:07,061 INFO L124 PetriNetUnfolderBase]: 3736/6309 cut-off events. [2024-06-14 13:54:07,061 INFO L125 PetriNetUnfolderBase]: For 684268/684270 co-relation queries the response was YES. [2024-06-14 13:54:07,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48524 conditions, 6309 events. 3736/6309 cut-off events. For 684268/684270 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43197 event pairs, 1032 based on Foata normal form. 4/6312 useless extension candidates. Maximal degree in co-relation 48372. Up to 5575 conditions per place. [2024-06-14 13:54:07,155 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 363 selfloop transitions, 98 changer transitions 0/467 dead transitions. [2024-06-14 13:54:07,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 467 transitions, 9089 flow [2024-06-14 13:54:07,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:54:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:54:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 13:54:07,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 13:54:07,157 INFO L175 Difference]: Start difference. First operand has 319 places, 438 transitions, 7844 flow. Second operand 6 states and 156 transitions. [2024-06-14 13:54:07,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 467 transitions, 9089 flow [2024-06-14 13:54:09,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 467 transitions, 8286 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:09,228 INFO L231 Difference]: Finished difference. Result has 316 places, 441 transitions, 7332 flow [2024-06-14 13:54:09,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7047, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7332, PETRI_PLACES=316, PETRI_TRANSITIONS=441} [2024-06-14 13:54:09,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-14 13:54:09,229 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 441 transitions, 7332 flow [2024-06-14 13:54:09,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:09,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:09,229 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 13:54:09,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:54:09,235 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 13:54:09,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1344870543, now seen corresponding path program 10 times [2024-06-14 13:54:09,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:09,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558617649] [2024-06-14 13:54:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:09,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:09,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:09,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558617649] [2024-06-14 13:54:09,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558617649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:09,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:09,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:09,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642153902] [2024-06-14 13:54:09,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:09,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:09,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:09,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:09,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:09,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:09,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 441 transitions, 7332 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:09,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:09,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:09,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:10,622 INFO L124 PetriNetUnfolderBase]: 3733/6304 cut-off events. [2024-06-14 13:54:10,623 INFO L125 PetriNetUnfolderBase]: For 687174/687174 co-relation queries the response was YES. [2024-06-14 13:54:10,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47766 conditions, 6304 events. 3733/6304 cut-off events. For 687174/687174 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43150 event pairs, 1022 based on Foata normal form. 1/6304 useless extension candidates. Maximal degree in co-relation 47614. Up to 5795 conditions per place. [2024-06-14 13:54:10,706 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 399 selfloop transitions, 53 changer transitions 0/458 dead transitions. [2024-06-14 13:54:10,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 458 transitions, 8454 flow [2024-06-14 13:54:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 13:54:10,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-14 13:54:10,708 INFO L175 Difference]: Start difference. First operand has 316 places, 441 transitions, 7332 flow. Second operand 9 states and 190 transitions. [2024-06-14 13:54:10,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 458 transitions, 8454 flow [2024-06-14 13:54:14,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 458 transitions, 8222 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:14,230 INFO L231 Difference]: Finished difference. Result has 320 places, 441 transitions, 7214 flow [2024-06-14 13:54:14,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7102, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7214, PETRI_PLACES=320, PETRI_TRANSITIONS=441} [2024-06-14 13:54:14,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 13:54:14,231 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 441 transitions, 7214 flow [2024-06-14 13:54:14,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:14,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:14,232 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 13:54:14,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:54:14,232 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 13:54:14,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash -437783973, now seen corresponding path program 9 times [2024-06-14 13:54:14,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:14,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756661772] [2024-06-14 13:54:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:14,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:14,404 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 13:54:14,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:14,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756661772] [2024-06-14 13:54:14,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756661772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:14,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:14,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:54:14,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029057102] [2024-06-14 13:54:14,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:14,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:54:14,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:14,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:54:14,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:54:14,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:14,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 441 transitions, 7214 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:14,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:14,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:14,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:15,533 INFO L124 PetriNetUnfolderBase]: 3727/6297 cut-off events. [2024-06-14 13:54:15,533 INFO L125 PetriNetUnfolderBase]: For 682282/682284 co-relation queries the response was YES. [2024-06-14 13:54:15,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47260 conditions, 6297 events. 3727/6297 cut-off events. For 682282/682284 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 43189 event pairs, 1031 based on Foata normal form. 4/6300 useless extension candidates. Maximal degree in co-relation 47108. Up to 5565 conditions per place. [2024-06-14 13:54:15,619 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 97 changer transitions 0/463 dead transitions. [2024-06-14 13:54:15,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 463 transitions, 8184 flow [2024-06-14 13:54:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:54:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:54:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:54:15,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-14 13:54:15,621 INFO L175 Difference]: Start difference. First operand has 320 places, 441 transitions, 7214 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:54:15,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 463 transitions, 8184 flow [2024-06-14 13:54:17,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 463 transitions, 8044 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:17,666 INFO L231 Difference]: Finished difference. Result has 318 places, 441 transitions, 7284 flow [2024-06-14 13:54:17,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7074, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7284, PETRI_PLACES=318, PETRI_TRANSITIONS=441} [2024-06-14 13:54:17,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-14 13:54:17,667 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 441 transitions, 7284 flow [2024-06-14 13:54:17,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:17,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:17,667 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 13:54:17,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:54:17,667 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 13:54:17,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:17,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1352632323, now seen corresponding path program 11 times [2024-06-14 13:54:17,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:17,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894070589] [2024-06-14 13:54:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:17,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:17,872 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 13:54:17,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:17,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894070589] [2024-06-14 13:54:17,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894070589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:17,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:17,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:17,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388828210] [2024-06-14 13:54:17,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:17,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:17,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:17,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:17,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:17,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:17,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 441 transitions, 7284 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:17,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:17,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:17,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:19,055 INFO L124 PetriNetUnfolderBase]: 3724/6292 cut-off events. [2024-06-14 13:54:19,055 INFO L125 PetriNetUnfolderBase]: For 689607/689607 co-relation queries the response was YES. [2024-06-14 13:54:19,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47478 conditions, 6292 events. 3724/6292 cut-off events. For 689607/689607 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43101 event pairs, 1022 based on Foata normal form. 1/6292 useless extension candidates. Maximal degree in co-relation 47325. Up to 5784 conditions per place. [2024-06-14 13:54:19,143 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 53 changer transitions 0/457 dead transitions. [2024-06-14 13:54:19,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 457 transitions, 8224 flow [2024-06-14 13:54:19,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 13:54:19,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:54:19,145 INFO L175 Difference]: Start difference. First operand has 318 places, 441 transitions, 7284 flow. Second operand 9 states and 189 transitions. [2024-06-14 13:54:19,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 457 transitions, 8224 flow [2024-06-14 13:54:21,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 457 transitions, 7920 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:21,408 INFO L231 Difference]: Finished difference. Result has 320 places, 441 transitions, 7092 flow [2024-06-14 13:54:21,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6980, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7092, PETRI_PLACES=320, PETRI_TRANSITIONS=441} [2024-06-14 13:54:21,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 13:54:21,408 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 441 transitions, 7092 flow [2024-06-14 13:54:21,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:21,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:21,409 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 13:54:21,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:54:21,409 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 13:54:21,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1219417859, now seen corresponding path program 12 times [2024-06-14 13:54:21,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:21,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279061936] [2024-06-14 13:54:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:21,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:21,599 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 13:54:21,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:21,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279061936] [2024-06-14 13:54:21,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279061936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:21,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:21,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:21,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316237197] [2024-06-14 13:54:21,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:21,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:21,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:21,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:21,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 441 transitions, 7092 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:21,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:21,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:21,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:22,843 INFO L124 PetriNetUnfolderBase]: 3734/6311 cut-off events. [2024-06-14 13:54:22,844 INFO L125 PetriNetUnfolderBase]: For 676804/676806 co-relation queries the response was YES. [2024-06-14 13:54:22,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47091 conditions, 6311 events. 3734/6311 cut-off events. For 676804/676806 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43278 event pairs, 1031 based on Foata normal form. 4/6314 useless extension candidates. Maximal degree in co-relation 46938. Up to 5451 conditions per place. [2024-06-14 13:54:22,936 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 145 changer transitions 0/471 dead transitions. [2024-06-14 13:54:22,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 471 transitions, 8530 flow [2024-06-14 13:54:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 13:54:22,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-14 13:54:22,937 INFO L175 Difference]: Start difference. First operand has 320 places, 441 transitions, 7092 flow. Second operand 8 states and 190 transitions. [2024-06-14 13:54:22,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 471 transitions, 8530 flow [2024-06-14 13:54:25,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 471 transitions, 8402 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:25,510 INFO L231 Difference]: Finished difference. Result has 320 places, 445 transitions, 7351 flow [2024-06-14 13:54:25,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7351, PETRI_PLACES=320, PETRI_TRANSITIONS=445} [2024-06-14 13:54:25,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 13:54:25,510 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 445 transitions, 7351 flow [2024-06-14 13:54:25,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:25,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:25,511 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 13:54:25,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:54:25,511 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 13:54:25,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:25,511 INFO L85 PathProgramCache]: Analyzing trace with hash 721394463, now seen corresponding path program 13 times [2024-06-14 13:54:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:25,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658214113] [2024-06-14 13:54:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:25,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:25,708 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 13:54:25,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:25,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658214113] [2024-06-14 13:54:25,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658214113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:25,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:25,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:25,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149933163] [2024-06-14 13:54:25,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:25,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:25,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:25,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:25,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:25,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:25,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 445 transitions, 7351 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:25,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:25,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:25,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:26,906 INFO L124 PetriNetUnfolderBase]: 3739/6319 cut-off events. [2024-06-14 13:54:26,906 INFO L125 PetriNetUnfolderBase]: For 688437/688437 co-relation queries the response was YES. [2024-06-14 13:54:26,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47685 conditions, 6319 events. 3739/6319 cut-off events. For 688437/688437 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43366 event pairs, 1022 based on Foata normal form. 1/6319 useless extension candidates. Maximal degree in co-relation 47531. Up to 5455 conditions per place. [2024-06-14 13:54:26,994 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 313 selfloop transitions, 160 changer transitions 0/479 dead transitions. [2024-06-14 13:54:26,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 479 transitions, 8986 flow [2024-06-14 13:54:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 13:54:26,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-14 13:54:26,996 INFO L175 Difference]: Start difference. First operand has 320 places, 445 transitions, 7351 flow. Second operand 9 states and 212 transitions. [2024-06-14 13:54:26,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 479 transitions, 8986 flow [2024-06-14 13:54:29,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 479 transitions, 8656 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:29,225 INFO L231 Difference]: Finished difference. Result has 323 places, 448 transitions, 7424 flow [2024-06-14 13:54:29,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7025, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7424, PETRI_PLACES=323, PETRI_TRANSITIONS=448} [2024-06-14 13:54:29,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-14 13:54:29,226 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 448 transitions, 7424 flow [2024-06-14 13:54:29,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:29,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:29,226 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 13:54:29,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:54:29,226 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 13:54:29,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1212066209, now seen corresponding path program 14 times [2024-06-14 13:54:29,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:29,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031066486] [2024-06-14 13:54:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:29,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:29,431 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 13:54:29,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031066486] [2024-06-14 13:54:29,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031066486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:29,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:29,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:29,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832122450] [2024-06-14 13:54:29,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:29,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:29,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:29,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:29,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:29,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 448 transitions, 7424 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:29,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:29,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:29,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:30,769 INFO L124 PetriNetUnfolderBase]: 3741/6325 cut-off events. [2024-06-14 13:54:30,770 INFO L125 PetriNetUnfolderBase]: For 703163/703165 co-relation queries the response was YES. [2024-06-14 13:54:30,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47790 conditions, 6325 events. 3741/6325 cut-off events. For 703163/703165 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 43409 event pairs, 1031 based on Foata normal form. 4/6328 useless extension candidates. Maximal degree in co-relation 47635. Up to 5459 conditions per place. [2024-06-14 13:54:30,852 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 144 changer transitions 0/476 dead transitions. [2024-06-14 13:54:30,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 476 transitions, 9044 flow [2024-06-14 13:54:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 13:54:30,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-14 13:54:30,853 INFO L175 Difference]: Start difference. First operand has 323 places, 448 transitions, 7424 flow. Second operand 9 states and 206 transitions. [2024-06-14 13:54:30,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 476 transitions, 9044 flow [2024-06-14 13:54:33,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 476 transitions, 8743 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:33,051 INFO L231 Difference]: Finished difference. Result has 325 places, 451 transitions, 7498 flow [2024-06-14 13:54:33,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7135, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7498, PETRI_PLACES=325, PETRI_TRANSITIONS=451} [2024-06-14 13:54:33,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-14 13:54:33,051 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 451 transitions, 7498 flow [2024-06-14 13:54:33,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:33,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:33,052 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] [2024-06-14 13:54:33,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:54:33,052 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 13:54:33,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:33,052 INFO L85 PathProgramCache]: Analyzing trace with hash -15546255, now seen corresponding path program 15 times [2024-06-14 13:54:33,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:33,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594976580] [2024-06-14 13:54:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:33,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:33,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:33,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594976580] [2024-06-14 13:54:33,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594976580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:33,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:33,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:33,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715214123] [2024-06-14 13:54:33,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:33,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:33,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:33,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:33,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 451 transitions, 7498 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:33,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:33,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:33,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:34,475 INFO L124 PetriNetUnfolderBase]: 3738/6320 cut-off events. [2024-06-14 13:54:34,476 INFO L125 PetriNetUnfolderBase]: For 695364/695364 co-relation queries the response was YES. [2024-06-14 13:54:34,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47618 conditions, 6320 events. 3738/6320 cut-off events. For 695364/695364 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 43354 event pairs, 1022 based on Foata normal form. 1/6320 useless extension candidates. Maximal degree in co-relation 47463. Up to 5457 conditions per place. [2024-06-14 13:54:34,568 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 168 changer transitions 0/480 dead transitions. [2024-06-14 13:54:34,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 480 transitions, 8700 flow [2024-06-14 13:54:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 13:54:34,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-14 13:54:34,569 INFO L175 Difference]: Start difference. First operand has 325 places, 451 transitions, 7498 flow. Second operand 9 states and 211 transitions. [2024-06-14 13:54:34,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 480 transitions, 8700 flow [2024-06-14 13:54:36,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 480 transitions, 8310 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:36,852 INFO L231 Difference]: Finished difference. Result has 327 places, 451 transitions, 7454 flow [2024-06-14 13:54:36,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7108, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7454, PETRI_PLACES=327, PETRI_TRANSITIONS=451} [2024-06-14 13:54:36,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-14 13:54:36,853 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 451 transitions, 7454 flow [2024-06-14 13:54:36,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:36,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:36,853 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 13:54:36,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:54:36,853 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 13:54:36,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1222914101, now seen corresponding path program 7 times [2024-06-14 13:54:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:36,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136419625] [2024-06-14 13:54:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:36,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:37,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:37,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136419625] [2024-06-14 13:54:37,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136419625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:37,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:37,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:37,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307419853] [2024-06-14 13:54:37,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:37,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:37,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:37,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:37,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:37,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:37,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 451 transitions, 7454 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:37,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:37,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:37,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:38,374 INFO L124 PetriNetUnfolderBase]: 3870/6541 cut-off events. [2024-06-14 13:54:38,374 INFO L125 PetriNetUnfolderBase]: For 885568/885570 co-relation queries the response was YES. [2024-06-14 13:54:38,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48955 conditions, 6541 events. 3870/6541 cut-off events. For 885568/885570 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45181 event pairs, 1077 based on Foata normal form. 44/6584 useless extension candidates. Maximal degree in co-relation 48799. Up to 5475 conditions per place. [2024-06-14 13:54:38,461 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 159 changer transitions 3/488 dead transitions. [2024-06-14 13:54:38,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 488 transitions, 8962 flow [2024-06-14 13:54:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 13:54:38,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-14 13:54:38,462 INFO L175 Difference]: Start difference. First operand has 327 places, 451 transitions, 7454 flow. Second operand 8 states and 199 transitions. [2024-06-14 13:54:38,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 488 transitions, 8962 flow [2024-06-14 13:54:41,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 488 transitions, 8500 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-14 13:54:41,508 INFO L231 Difference]: Finished difference. Result has 325 places, 452 transitions, 7384 flow [2024-06-14 13:54:41,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7000, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7384, PETRI_PLACES=325, PETRI_TRANSITIONS=452} [2024-06-14 13:54:41,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-14 13:54:41,509 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 452 transitions, 7384 flow [2024-06-14 13:54:41,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:41,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:41,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:41,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:54:41,509 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 13:54:41,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1223240531, now seen corresponding path program 8 times [2024-06-14 13:54:41,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:41,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32100106] [2024-06-14 13:54:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:41,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:41,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:41,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32100106] [2024-06-14 13:54:41,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32100106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:41,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:41,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:41,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255034955] [2024-06-14 13:54:41,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:41,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:41,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:41,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:41,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:41,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 452 transitions, 7384 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:41,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:41,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:41,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:43,013 INFO L124 PetriNetUnfolderBase]: 4095/6932 cut-off events. [2024-06-14 13:54:43,013 INFO L125 PetriNetUnfolderBase]: For 953862/953864 co-relation queries the response was YES. [2024-06-14 13:54:43,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52561 conditions, 6932 events. 4095/6932 cut-off events. For 953862/953864 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 48362 event pairs, 1021 based on Foata normal form. 38/6969 useless extension candidates. Maximal degree in co-relation 52406. Up to 5020 conditions per place. [2024-06-14 13:54:43,106 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 169 changer transitions 4/499 dead transitions. [2024-06-14 13:54:43,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 499 transitions, 9140 flow [2024-06-14 13:54:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 13:54:43,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 13:54:43,107 INFO L175 Difference]: Start difference. First operand has 325 places, 452 transitions, 7384 flow. Second operand 8 states and 208 transitions. [2024-06-14 13:54:43,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 499 transitions, 9140 flow [2024-06-14 13:54:45,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 499 transitions, 8776 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:45,477 INFO L231 Difference]: Finished difference. Result has 327 places, 453 transitions, 7408 flow [2024-06-14 13:54:45,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7020, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7408, PETRI_PLACES=327, PETRI_TRANSITIONS=453} [2024-06-14 13:54:45,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-14 13:54:45,478 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 453 transitions, 7408 flow [2024-06-14 13:54:45,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:45,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:45,478 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 13:54:45,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:54:45,478 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 13:54:45,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1212189341, now seen corresponding path program 9 times [2024-06-14 13:54:45,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:45,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880419291] [2024-06-14 13:54:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:45,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:45,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880419291] [2024-06-14 13:54:45,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880419291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:45,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:45,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:45,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462727446] [2024-06-14 13:54:45,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:45,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:45,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:45,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:45,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:45,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 453 transitions, 7408 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:45,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:45,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:45,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:46,921 INFO L124 PetriNetUnfolderBase]: 4105/6958 cut-off events. [2024-06-14 13:54:46,921 INFO L125 PetriNetUnfolderBase]: For 932204/932206 co-relation queries the response was YES. [2024-06-14 13:54:46,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50867 conditions, 6958 events. 4105/6958 cut-off events. For 932204/932206 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 48845 event pairs, 1226 based on Foata normal form. 44/7001 useless extension candidates. Maximal degree in co-relation 50711. Up to 5876 conditions per place. [2024-06-14 13:54:47,011 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 144 changer transitions 3/482 dead transitions. [2024-06-14 13:54:47,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 482 transitions, 8818 flow [2024-06-14 13:54:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 13:54:47,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:54:47,013 INFO L175 Difference]: Start difference. First operand has 327 places, 453 transitions, 7408 flow. Second operand 8 states and 192 transitions. [2024-06-14 13:54:47,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 482 transitions, 8818 flow [2024-06-14 13:54:50,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 482 transitions, 8232 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:50,065 INFO L231 Difference]: Finished difference. Result has 328 places, 452 transitions, 7102 flow [2024-06-14 13:54:50,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6822, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7102, PETRI_PLACES=328, PETRI_TRANSITIONS=452} [2024-06-14 13:54:50,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-14 13:54:50,066 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 452 transitions, 7102 flow [2024-06-14 13:54:50,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:50,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:50,066 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 13:54:50,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:54:50,066 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 13:54:50,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:50,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1211789627, now seen corresponding path program 2 times [2024-06-14 13:54:50,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:50,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062061430] [2024-06-14 13:54:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:50,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:50,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:50,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062061430] [2024-06-14 13:54:50,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062061430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:50,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:50,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:50,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872348791] [2024-06-14 13:54:50,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:50,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:50,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:50,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:50,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:50,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:50,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 452 transitions, 7102 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:50,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:50,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:50,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:51,682 INFO L124 PetriNetUnfolderBase]: 4337/7376 cut-off events. [2024-06-14 13:54:51,682 INFO L125 PetriNetUnfolderBase]: For 998987/998989 co-relation queries the response was YES. [2024-06-14 13:54:51,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53892 conditions, 7376 events. 4337/7376 cut-off events. For 998987/998989 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 52497 event pairs, 1251 based on Foata normal form. 38/7413 useless extension candidates. Maximal degree in co-relation 53736. Up to 5670 conditions per place. [2024-06-14 13:54:51,778 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 343 selfloop transitions, 143 changer transitions 0/492 dead transitions. [2024-06-14 13:54:51,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 492 transitions, 8878 flow [2024-06-14 13:54:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:54:51,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-14 13:54:51,780 INFO L175 Difference]: Start difference. First operand has 328 places, 452 transitions, 7102 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:54:51,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 492 transitions, 8878 flow [2024-06-14 13:54:54,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 492 transitions, 8525 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:54,878 INFO L231 Difference]: Finished difference. Result has 330 places, 456 transitions, 7186 flow [2024-06-14 13:54:54,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7186, PETRI_PLACES=330, PETRI_TRANSITIONS=456} [2024-06-14 13:54:54,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-14 13:54:54,878 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 456 transitions, 7186 flow [2024-06-14 13:54:54,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:54,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:54,879 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 13:54:54,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:54:54,879 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 13:54:54,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:54,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1712274905, now seen corresponding path program 3 times [2024-06-14 13:54:54,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:54,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718283967] [2024-06-14 13:54:54,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:54,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:55,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:55,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718283967] [2024-06-14 13:54:55,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718283967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:55,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:55,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:55,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647374832] [2024-06-14 13:54:55,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:55,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:55,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:55,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 456 transitions, 7186 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:55,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:55,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:55,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:56,481 INFO L124 PetriNetUnfolderBase]: 4505/7684 cut-off events. [2024-06-14 13:54:56,481 INFO L125 PetriNetUnfolderBase]: For 1028100/1028102 co-relation queries the response was YES. [2024-06-14 13:54:56,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55864 conditions, 7684 events. 4505/7684 cut-off events. For 1028100/1028102 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 55264 event pairs, 1096 based on Foata normal form. 44/7727 useless extension candidates. Maximal degree in co-relation 55706. Up to 5945 conditions per place. [2024-06-14 13:54:56,579 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 385 selfloop transitions, 110 changer transitions 0/501 dead transitions. [2024-06-14 13:54:56,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 501 transitions, 8648 flow [2024-06-14 13:54:56,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:56,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-14 13:54:56,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-14 13:54:56,581 INFO L175 Difference]: Start difference. First operand has 330 places, 456 transitions, 7186 flow. Second operand 7 states and 185 transitions. [2024-06-14 13:54:56,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 501 transitions, 8648 flow [2024-06-14 13:55:00,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 501 transitions, 8408 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 13:55:00,305 INFO L231 Difference]: Finished difference. Result has 334 places, 462 transitions, 7363 flow [2024-06-14 13:55:00,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7363, PETRI_PLACES=334, PETRI_TRANSITIONS=462} [2024-06-14 13:55:00,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-14 13:55:00,305 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 462 transitions, 7363 flow [2024-06-14 13:55:00,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:00,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:00,306 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 13:55:00,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:55:00,306 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 13:55:00,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:00,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1269446105, now seen corresponding path program 4 times [2024-06-14 13:55:00,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:00,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283011408] [2024-06-14 13:55:00,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:00,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:00,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:00,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283011408] [2024-06-14 13:55:00,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283011408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:00,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:00,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:00,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137727886] [2024-06-14 13:55:00,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:00,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:00,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:00,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:00,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:00,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:00,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 462 transitions, 7363 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:00,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:00,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:00,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:02,360 INFO L124 PetriNetUnfolderBase]: 4954/8465 cut-off events. [2024-06-14 13:55:02,361 INFO L125 PetriNetUnfolderBase]: For 1291156/1291158 co-relation queries the response was YES. [2024-06-14 13:55:02,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65086 conditions, 8465 events. 4954/8465 cut-off events. For 1291156/1291158 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 61892 event pairs, 1199 based on Foata normal form. 44/8508 useless extension candidates. Maximal degree in co-relation 64925. Up to 4666 conditions per place. [2024-06-14 13:55:02,478 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 393 selfloop transitions, 114 changer transitions 0/513 dead transitions. [2024-06-14 13:55:02,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 513 transitions, 9107 flow [2024-06-14 13:55:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:55:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:55:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 13:55:02,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-14 13:55:02,479 INFO L175 Difference]: Start difference. First operand has 334 places, 462 transitions, 7363 flow. Second operand 7 states and 188 transitions. [2024-06-14 13:55:02,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 513 transitions, 9107 flow [2024-06-14 13:55:06,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 513 transitions, 8899 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 13:55:06,194 INFO L231 Difference]: Finished difference. Result has 339 places, 469 transitions, 7646 flow [2024-06-14 13:55:06,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7163, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7646, PETRI_PLACES=339, PETRI_TRANSITIONS=469} [2024-06-14 13:55:06,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-14 13:55:06,196 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 469 transitions, 7646 flow [2024-06-14 13:55:06,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:06,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:06,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:06,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:55:06,197 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 13:55:06,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash -571703117, now seen corresponding path program 1 times [2024-06-14 13:55:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:06,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590640892] [2024-06-14 13:55:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:06,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:06,412 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 13:55:06,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:06,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590640892] [2024-06-14 13:55:06,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590640892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:06,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:06,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:06,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012208040] [2024-06-14 13:55:06,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:06,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:06,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:06,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:06,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:06,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:06,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 469 transitions, 7646 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:06,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:06,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:06,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:08,243 INFO L124 PetriNetUnfolderBase]: 5235/8953 cut-off events. [2024-06-14 13:55:08,243 INFO L125 PetriNetUnfolderBase]: For 1431921/1431929 co-relation queries the response was YES. [2024-06-14 13:55:08,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71007 conditions, 8953 events. 5235/8953 cut-off events. For 1431921/1431929 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 67044 event pairs, 1651 based on Foata normal form. 39/8987 useless extension candidates. Maximal degree in co-relation 70843. Up to 6372 conditions per place. [2024-06-14 13:55:08,379 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 213 selfloop transitions, 285 changer transitions 7/511 dead transitions. [2024-06-14 13:55:08,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 511 transitions, 9276 flow [2024-06-14 13:55:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 13:55:08,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-14 13:55:08,380 INFO L175 Difference]: Start difference. First operand has 339 places, 469 transitions, 7646 flow. Second operand 8 states and 201 transitions. [2024-06-14 13:55:08,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 511 transitions, 9276 flow [2024-06-14 13:55:13,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 511 transitions, 9082 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-14 13:55:13,125 INFO L231 Difference]: Finished difference. Result has 344 places, 471 transitions, 8087 flow [2024-06-14 13:55:13,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7456, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8087, PETRI_PLACES=344, PETRI_TRANSITIONS=471} [2024-06-14 13:55:13,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-14 13:55:13,126 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 471 transitions, 8087 flow [2024-06-14 13:55:13,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:13,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:13,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:13,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:55:13,126 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 13:55:13,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:13,127 INFO L85 PathProgramCache]: Analyzing trace with hash 290785843, now seen corresponding path program 2 times [2024-06-14 13:55:13,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:13,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880009310] [2024-06-14 13:55:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:13,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:13,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:13,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880009310] [2024-06-14 13:55:13,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880009310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:13,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:13,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:13,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266763892] [2024-06-14 13:55:13,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:13,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:13,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:13,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:13,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:13,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:13,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 471 transitions, 8087 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:13,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:13,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:13,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:15,527 INFO L124 PetriNetUnfolderBase]: 5512/9406 cut-off events. [2024-06-14 13:55:15,527 INFO L125 PetriNetUnfolderBase]: For 1632364/1632372 co-relation queries the response was YES. [2024-06-14 13:55:15,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77401 conditions, 9406 events. 5512/9406 cut-off events. For 1632364/1632372 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 70967 event pairs, 1963 based on Foata normal form. 39/9440 useless extension candidates. Maximal degree in co-relation 77236. Up to 7574 conditions per place. [2024-06-14 13:55:15,681 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 271 changer transitions 4/507 dead transitions. [2024-06-14 13:55:15,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 507 transitions, 9709 flow [2024-06-14 13:55:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:15,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:55:15,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:55:15,682 INFO L175 Difference]: Start difference. First operand has 344 places, 471 transitions, 8087 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:55:15,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 507 transitions, 9709 flow [2024-06-14 13:55:21,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 507 transitions, 8936 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:21,679 INFO L231 Difference]: Finished difference. Result has 346 places, 474 transitions, 7968 flow [2024-06-14 13:55:21,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7346, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7968, PETRI_PLACES=346, PETRI_TRANSITIONS=474} [2024-06-14 13:55:21,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 13:55:21,681 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 474 transitions, 7968 flow [2024-06-14 13:55:21,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:21,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:21,682 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 13:55:21,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:55:21,682 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 13:55:21,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash 290933713, now seen corresponding path program 3 times [2024-06-14 13:55:21,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:21,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022271271] [2024-06-14 13:55:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:21,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:21,866 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 13:55:21,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:21,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022271271] [2024-06-14 13:55:21,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022271271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:21,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:21,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:21,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448628808] [2024-06-14 13:55:21,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:21,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:21,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:21,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:21,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:21,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:21,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 474 transitions, 7968 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:21,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:21,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:21,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:23,846 INFO L124 PetriNetUnfolderBase]: 5395/9227 cut-off events. [2024-06-14 13:55:23,846 INFO L125 PetriNetUnfolderBase]: For 1491183/1491191 co-relation queries the response was YES. [2024-06-14 13:55:23,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71914 conditions, 9227 events. 5395/9227 cut-off events. For 1491183/1491191 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 69474 event pairs, 1970 based on Foata normal form. 45/9267 useless extension candidates. Maximal degree in co-relation 71749. Up to 7736 conditions per place. [2024-06-14 13:55:23,966 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 266 changer transitions 3/499 dead transitions. [2024-06-14 13:55:23,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 499 transitions, 9226 flow [2024-06-14 13:55:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 13:55:23,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 13:55:23,967 INFO L175 Difference]: Start difference. First operand has 346 places, 474 transitions, 7968 flow. Second operand 8 states and 189 transitions. [2024-06-14 13:55:23,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 499 transitions, 9226 flow [2024-06-14 13:55:28,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 499 transitions, 8805 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 13:55:28,452 INFO L231 Difference]: Finished difference. Result has 350 places, 473 transitions, 8073 flow [2024-06-14 13:55:28,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7547, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8073, PETRI_PLACES=350, PETRI_TRANSITIONS=473} [2024-06-14 13:55:28,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-14 13:55:28,453 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 473 transitions, 8073 flow [2024-06-14 13:55:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:28,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:28,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:28,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:55:28,454 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 13:55:28,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:28,456 INFO L85 PathProgramCache]: Analyzing trace with hash -430007313, now seen corresponding path program 4 times [2024-06-14 13:55:28,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:28,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366869377] [2024-06-14 13:55:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:28,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:28,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:28,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366869377] [2024-06-14 13:55:28,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366869377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:28,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:28,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:28,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773666300] [2024-06-14 13:55:28,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:28,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:28,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:28,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:28,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:28,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 473 transitions, 8073 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:28,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:28,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:28,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:30,704 INFO L124 PetriNetUnfolderBase]: 5441/9333 cut-off events. [2024-06-14 13:55:30,704 INFO L125 PetriNetUnfolderBase]: For 1394253/1394253 co-relation queries the response was YES. [2024-06-14 13:55:30,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72979 conditions, 9333 events. 5441/9333 cut-off events. For 1394253/1394253 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 70529 event pairs, 1903 based on Foata normal form. 16/9348 useless extension candidates. Maximal degree in co-relation 72812. Up to 8551 conditions per place. [2024-06-14 13:55:30,819 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 55 changer transitions 0/495 dead transitions. [2024-06-14 13:55:30,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 495 transitions, 9163 flow [2024-06-14 13:55:30,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 13:55:30,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 13:55:30,820 INFO L175 Difference]: Start difference. First operand has 350 places, 473 transitions, 8073 flow. Second operand 9 states and 192 transitions. [2024-06-14 13:55:30,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 495 transitions, 9163 flow [2024-06-14 13:55:36,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 495 transitions, 8623 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:55:36,317 INFO L231 Difference]: Finished difference. Result has 352 places, 475 transitions, 7703 flow [2024-06-14 13:55:36,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7533, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7703, PETRI_PLACES=352, PETRI_TRANSITIONS=475} [2024-06-14 13:55:36,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 13:55:36,317 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 475 transitions, 7703 flow [2024-06-14 13:55:36,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:36,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:36,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:36,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:55:36,318 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 13:55:36,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:36,319 INFO L85 PathProgramCache]: Analyzing trace with hash -430155183, now seen corresponding path program 5 times [2024-06-14 13:55:36,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:36,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210421135] [2024-06-14 13:55:36,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:36,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:36,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:36,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210421135] [2024-06-14 13:55:36,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210421135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:36,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:36,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:36,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315145552] [2024-06-14 13:55:36,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:36,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:36,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:36,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:36,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:36,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:36,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 475 transitions, 7703 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:36,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:36,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:36,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:38,436 INFO L124 PetriNetUnfolderBase]: 5527/9469 cut-off events. [2024-06-14 13:55:38,437 INFO L125 PetriNetUnfolderBase]: For 1445309/1445309 co-relation queries the response was YES. [2024-06-14 13:55:38,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74376 conditions, 9469 events. 5527/9469 cut-off events. For 1445309/1445309 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 71674 event pairs, 1897 based on Foata normal form. 12/9480 useless extension candidates. Maximal degree in co-relation 74208. Up to 8511 conditions per place. [2024-06-14 13:55:38,591 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 62 changer transitions 0/502 dead transitions. [2024-06-14 13:55:38,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 502 transitions, 9055 flow [2024-06-14 13:55:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 13:55:38,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 13:55:38,593 INFO L175 Difference]: Start difference. First operand has 352 places, 475 transitions, 7703 flow. Second operand 9 states and 195 transitions. [2024-06-14 13:55:38,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 502 transitions, 9055 flow [2024-06-14 13:55:43,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 502 transitions, 8915 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:55:43,778 INFO L231 Difference]: Finished difference. Result has 354 places, 478 transitions, 7780 flow [2024-06-14 13:55:43,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7563, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7780, PETRI_PLACES=354, PETRI_TRANSITIONS=478} [2024-06-14 13:55:43,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-14 13:55:43,779 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 478 transitions, 7780 flow [2024-06-14 13:55:43,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:43,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:43,779 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 13:55:43,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:55:43,779 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 13:55:43,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:43,779 INFO L85 PathProgramCache]: Analyzing trace with hash -424429731, now seen corresponding path program 1 times [2024-06-14 13:55:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:43,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771025215] [2024-06-14 13:55:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:43,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:44,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:44,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771025215] [2024-06-14 13:55:44,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771025215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:44,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:44,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:44,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199897751] [2024-06-14 13:55:44,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:44,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:44,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:44,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:44,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:44,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 478 transitions, 7780 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:44,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:44,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:44,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:45,939 INFO L124 PetriNetUnfolderBase]: 5692/9694 cut-off events. [2024-06-14 13:55:45,939 INFO L125 PetriNetUnfolderBase]: For 1574952/1574952 co-relation queries the response was YES. [2024-06-14 13:55:46,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78416 conditions, 9694 events. 5692/9694 cut-off events. For 1574952/1574952 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 73227 event pairs, 1923 based on Foata normal form. 12/9705 useless extension candidates. Maximal degree in co-relation 78247. Up to 8757 conditions per place. [2024-06-14 13:55:46,079 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 463 selfloop transitions, 39 changer transitions 0/508 dead transitions. [2024-06-14 13:55:46,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 508 transitions, 9213 flow [2024-06-14 13:55:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 13:55:46,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 13:55:46,080 INFO L175 Difference]: Start difference. First operand has 354 places, 478 transitions, 7780 flow. Second operand 9 states and 192 transitions. [2024-06-14 13:55:46,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 508 transitions, 9213 flow [2024-06-14 13:55:50,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 508 transitions, 9107 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:55:50,904 INFO L231 Difference]: Finished difference. Result has 359 places, 484 transitions, 7938 flow [2024-06-14 13:55:50,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7674, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7938, PETRI_PLACES=359, PETRI_TRANSITIONS=484} [2024-06-14 13:55:50,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-14 13:55:50,905 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 484 transitions, 7938 flow [2024-06-14 13:55:50,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:50,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:50,906 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 13:55:50,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:55:50,907 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 13:55:50,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash -15537327, now seen corresponding path program 6 times [2024-06-14 13:55:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:50,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956700016] [2024-06-14 13:55:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:50,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:51,101 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 13:55:51,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:51,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956700016] [2024-06-14 13:55:51,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956700016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:51,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:51,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:51,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80358531] [2024-06-14 13:55:51,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:51,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:51,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:51,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:51,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:51,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:51,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 484 transitions, 7938 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:51,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:51,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:51,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:53,236 INFO L124 PetriNetUnfolderBase]: 5811/9937 cut-off events. [2024-06-14 13:55:53,236 INFO L125 PetriNetUnfolderBase]: For 1746688/1746688 co-relation queries the response was YES. [2024-06-14 13:55:53,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79778 conditions, 9937 events. 5811/9937 cut-off events. For 1746688/1746688 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 75793 event pairs, 2025 based on Foata normal form. 42/9978 useless extension candidates. Maximal degree in co-relation 79606. Up to 8592 conditions per place. [2024-06-14 13:55:53,381 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 167 changer transitions 3/521 dead transitions. [2024-06-14 13:55:53,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 521 transitions, 9332 flow [2024-06-14 13:55:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 13:55:53,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:55:53,383 INFO L175 Difference]: Start difference. First operand has 359 places, 484 transitions, 7938 flow. Second operand 9 states and 216 transitions. [2024-06-14 13:55:53,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 521 transitions, 9332 flow [2024-06-14 13:55:59,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 521 transitions, 9219 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:55:59,444 INFO L231 Difference]: Finished difference. Result has 363 places, 485 transitions, 8214 flow [2024-06-14 13:55:59,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7825, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8214, PETRI_PLACES=363, PETRI_TRANSITIONS=485} [2024-06-14 13:55:59,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-14 13:55:59,444 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 485 transitions, 8214 flow [2024-06-14 13:55:59,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:59,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:59,445 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 13:55:59,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:55:59,445 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 13:55:59,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:59,445 INFO L85 PathProgramCache]: Analyzing trace with hash -15685197, now seen corresponding path program 7 times [2024-06-14 13:55:59,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:59,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022984186] [2024-06-14 13:55:59,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:59,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:59,632 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 13:55:59,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:59,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022984186] [2024-06-14 13:55:59,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022984186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:59,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:59,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:59,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628942939] [2024-06-14 13:55:59,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:59,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:59,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:59,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:59,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:59,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 485 transitions, 8214 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:59,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:59,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:59,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:01,852 INFO L124 PetriNetUnfolderBase]: 6049/10351 cut-off events. [2024-06-14 13:56:01,853 INFO L125 PetriNetUnfolderBase]: For 1897715/1897715 co-relation queries the response was YES. [2024-06-14 13:56:01,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84754 conditions, 10351 events. 6049/10351 cut-off events. For 1897715/1897715 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 79724 event pairs, 1889 based on Foata normal form. 36/10386 useless extension candidates. Maximal degree in co-relation 84581. Up to 8039 conditions per place. [2024-06-14 13:56:02,009 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 183 changer transitions 4/532 dead transitions. [2024-06-14 13:56:02,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 532 transitions, 9888 flow [2024-06-14 13:56:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 13:56:02,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:56:02,011 INFO L175 Difference]: Start difference. First operand has 363 places, 485 transitions, 8214 flow. Second operand 9 states and 225 transitions. [2024-06-14 13:56:02,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 532 transitions, 9888 flow [2024-06-14 13:56:09,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 532 transitions, 9526 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:09,790 INFO L231 Difference]: Finished difference. Result has 365 places, 486 transitions, 8260 flow [2024-06-14 13:56:09,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7852, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8260, PETRI_PLACES=365, PETRI_TRANSITIONS=486} [2024-06-14 13:56:09,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-14 13:56:09,791 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 486 transitions, 8260 flow [2024-06-14 13:56:09,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:09,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:09,791 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 13:56:09,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:56:09,792 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 13:56:09,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:09,792 INFO L85 PathProgramCache]: Analyzing trace with hash -9959745, now seen corresponding path program 2 times [2024-06-14 13:56:09,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:09,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780867866] [2024-06-14 13:56:09,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:09,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:09,985 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 13:56:09,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:09,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780867866] [2024-06-14 13:56:09,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780867866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:09,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:09,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:09,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077502700] [2024-06-14 13:56:09,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:09,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:09,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:09,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:09,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:10,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:10,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 486 transitions, 8260 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:10,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:10,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:10,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:12,236 INFO L124 PetriNetUnfolderBase]: 6260/10640 cut-off events. [2024-06-14 13:56:12,236 INFO L125 PetriNetUnfolderBase]: For 1924041/1924041 co-relation queries the response was YES. [2024-06-14 13:56:12,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89766 conditions, 10640 events. 6260/10640 cut-off events. For 1924041/1924041 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 81580 event pairs, 2136 based on Foata normal form. 12/10651 useless extension candidates. Maximal degree in co-relation 89592. Up to 9380 conditions per place. [2024-06-14 13:56:12,393 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 466 selfloop transitions, 53 changer transitions 0/525 dead transitions. [2024-06-14 13:56:12,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 525 transitions, 9961 flow [2024-06-14 13:56:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 13:56:12,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-14 13:56:12,394 INFO L175 Difference]: Start difference. First operand has 365 places, 486 transitions, 8260 flow. Second operand 8 states and 175 transitions. [2024-06-14 13:56:12,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 525 transitions, 9961 flow [2024-06-14 13:56:20,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 525 transitions, 9663 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:56:20,391 INFO L231 Difference]: Finished difference. Result has 370 places, 499 transitions, 8474 flow [2024-06-14 13:56:20,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7981, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8474, PETRI_PLACES=370, PETRI_TRANSITIONS=499} [2024-06-14 13:56:20,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-14 13:56:20,392 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 499 transitions, 8474 flow [2024-06-14 13:56:20,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:20,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:20,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:20,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:56:20,392 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 13:56:20,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1534958687, now seen corresponding path program 3 times [2024-06-14 13:56:20,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:20,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087660526] [2024-06-14 13:56:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:20,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:20,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087660526] [2024-06-14 13:56:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087660526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:20,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:20,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:20,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324734771] [2024-06-14 13:56:20,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:20,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:20,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:20,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:20,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 499 transitions, 8474 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:20,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:20,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:20,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:23,037 INFO L124 PetriNetUnfolderBase]: 6542/11154 cut-off events. [2024-06-14 13:56:23,038 INFO L125 PetriNetUnfolderBase]: For 2180410/2180410 co-relation queries the response was YES. [2024-06-14 13:56:23,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94791 conditions, 11154 events. 6542/11154 cut-off events. For 2180410/2180410 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 86751 event pairs, 1926 based on Foata normal form. 42/11191 useless extension candidates. Maximal degree in co-relation 94614. Up to 8610 conditions per place. [2024-06-14 13:56:23,209 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 403 selfloop transitions, 141 changer transitions 0/550 dead transitions. [2024-06-14 13:56:23,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 550 transitions, 10114 flow [2024-06-14 13:56:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:23,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 13:56:23,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-14 13:56:23,210 INFO L175 Difference]: Start difference. First operand has 370 places, 499 transitions, 8474 flow. Second operand 8 states and 207 transitions. [2024-06-14 13:56:23,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 550 transitions, 10114 flow [2024-06-14 13:56:31,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 550 transitions, 9980 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 13:56:31,683 INFO L231 Difference]: Finished difference. Result has 376 places, 507 transitions, 8922 flow [2024-06-14 13:56:31,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8354, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8922, PETRI_PLACES=376, PETRI_TRANSITIONS=507} [2024-06-14 13:56:31,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-14 13:56:31,684 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 507 transitions, 8922 flow [2024-06-14 13:56:31,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:31,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:31,684 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 13:56:31,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:56:31,684 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 13:56:31,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:31,685 INFO L85 PathProgramCache]: Analyzing trace with hash -522619683, now seen corresponding path program 4 times [2024-06-14 13:56:31,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:31,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889277004] [2024-06-14 13:56:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:31,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:31,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:31,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889277004] [2024-06-14 13:56:31,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889277004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:31,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:31,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:31,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878874341] [2024-06-14 13:56:31,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:31,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:31,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:31,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:31,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:31,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:31,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 507 transitions, 8922 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:31,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:31,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:31,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:34,296 INFO L124 PetriNetUnfolderBase]: 6640/11373 cut-off events. [2024-06-14 13:56:34,296 INFO L125 PetriNetUnfolderBase]: For 2108682/2108684 co-relation queries the response was YES. [2024-06-14 13:56:34,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94960 conditions, 11373 events. 6640/11373 cut-off events. For 2108682/2108684 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 88676 event pairs, 1870 based on Foata normal form. 44/11416 useless extension candidates. Maximal degree in co-relation 94781. Up to 6224 conditions per place. [2024-06-14 13:56:34,488 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 428 selfloop transitions, 118 changer transitions 0/552 dead transitions. [2024-06-14 13:56:34,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 552 transitions, 10644 flow [2024-06-14 13:56:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 13:56:34,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-14 13:56:34,489 INFO L175 Difference]: Start difference. First operand has 376 places, 507 transitions, 8922 flow. Second operand 7 states and 188 transitions. [2024-06-14 13:56:34,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 552 transitions, 10644 flow [2024-06-14 13:56:43,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 552 transitions, 10356 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 13:56:43,902 INFO L231 Difference]: Finished difference. Result has 377 places, 509 transitions, 8948 flow [2024-06-14 13:56:43,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8644, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8948, PETRI_PLACES=377, PETRI_TRANSITIONS=509} [2024-06-14 13:56:43,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-14 13:56:43,902 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 509 transitions, 8948 flow [2024-06-14 13:56:43,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:43,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:43,903 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 13:56:43,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:56:43,903 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 13:56:43,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1961716716, now seen corresponding path program 1 times [2024-06-14 13:56:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:43,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970108421] [2024-06-14 13:56:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:44,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:44,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970108421] [2024-06-14 13:56:44,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970108421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:44,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:44,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:56:44,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378027283] [2024-06-14 13:56:44,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:44,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:56:44,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:44,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:56:44,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:56:44,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:44,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 509 transitions, 8948 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:44,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:44,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:44,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:46,343 INFO L124 PetriNetUnfolderBase]: 6707/11455 cut-off events. [2024-06-14 13:56:46,344 INFO L125 PetriNetUnfolderBase]: For 1930769/1930769 co-relation queries the response was YES. [2024-06-14 13:56:46,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95772 conditions, 11455 events. 6707/11455 cut-off events. For 1930769/1930769 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 89558 event pairs, 2196 based on Foata normal form. 2/11449 useless extension candidates. Maximal degree in co-relation 95593. Up to 9806 conditions per place. [2024-06-14 13:56:46,523 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 419 selfloop transitions, 125 changer transitions 0/550 dead transitions. [2024-06-14 13:56:46,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 550 transitions, 10775 flow [2024-06-14 13:56:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 13:56:46,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 13:56:46,524 INFO L175 Difference]: Start difference. First operand has 377 places, 509 transitions, 8948 flow. Second operand 7 states and 172 transitions. [2024-06-14 13:56:46,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 550 transitions, 10775 flow [2024-06-14 13:56:54,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 550 transitions, 10491 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 13:56:54,482 INFO L231 Difference]: Finished difference. Result has 381 places, 517 transitions, 9156 flow [2024-06-14 13:56:54,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8676, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9156, PETRI_PLACES=381, PETRI_TRANSITIONS=517} [2024-06-14 13:56:54,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-14 13:56:54,483 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 517 transitions, 9156 flow [2024-06-14 13:56:54,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:54,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:54,483 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 13:56:54,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:56:54,484 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 13:56:54,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:54,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1956002796, now seen corresponding path program 2 times [2024-06-14 13:56:54,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:54,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653087634] [2024-06-14 13:56:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:54,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:54,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:54,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653087634] [2024-06-14 13:56:54,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653087634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:54,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:54,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:56:54,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489884441] [2024-06-14 13:56:54,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:54,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:56:54,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:56:54,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:56:54,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:54,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 517 transitions, 9156 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:54,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:54,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:54,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:57,626 INFO L124 PetriNetUnfolderBase]: 6774/11560 cut-off events. [2024-06-14 13:56:57,627 INFO L125 PetriNetUnfolderBase]: For 1981003/1981003 co-relation queries the response was YES. [2024-06-14 13:56:57,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96972 conditions, 11560 events. 6774/11560 cut-off events. For 1981003/1981003 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 90493 event pairs, 2179 based on Foata normal form. 2/11554 useless extension candidates. Maximal degree in co-relation 96792. Up to 9850 conditions per place. [2024-06-14 13:56:57,785 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 419 selfloop transitions, 129 changer transitions 1/555 dead transitions. [2024-06-14 13:56:57,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 555 transitions, 10959 flow [2024-06-14 13:56:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:56:57,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-14 13:56:57,786 INFO L175 Difference]: Start difference. First operand has 381 places, 517 transitions, 9156 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:56:57,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 555 transitions, 10959 flow [2024-06-14 13:57:04,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 555 transitions, 10748 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-14 13:57:04,951 INFO L231 Difference]: Finished difference. Result has 386 places, 521 transitions, 9300 flow [2024-06-14 13:57:04,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8971, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9300, PETRI_PLACES=386, PETRI_TRANSITIONS=521} [2024-06-14 13:57:04,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-14 13:57:04,952 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 521 transitions, 9300 flow [2024-06-14 13:57:04,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:04,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:04,952 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 13:57:04,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:57:04,953 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 13:57:04,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1903624266, now seen corresponding path program 3 times [2024-06-14 13:57:04,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:04,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806074795] [2024-06-14 13:57:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:04,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:05,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:05,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806074795] [2024-06-14 13:57:05,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806074795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:05,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:05,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:57:05,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705955799] [2024-06-14 13:57:05,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:05,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:57:05,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:05,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:57:05,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:57:05,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:05,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 521 transitions, 9300 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:05,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:05,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:05,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:08,259 INFO L124 PetriNetUnfolderBase]: 6769/11573 cut-off events. [2024-06-14 13:57:08,260 INFO L125 PetriNetUnfolderBase]: For 2009280/2009280 co-relation queries the response was YES. [2024-06-14 13:57:08,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97490 conditions, 11573 events. 6769/11573 cut-off events. For 2009280/2009280 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 91044 event pairs, 2507 based on Foata normal form. 2/11562 useless extension candidates. Maximal degree in co-relation 97308. Up to 10466 conditions per place. [2024-06-14 13:57:08,423 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 429 selfloop transitions, 115 changer transitions 0/550 dead transitions. [2024-06-14 13:57:08,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 550 transitions, 10706 flow [2024-06-14 13:57:08,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:57:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:57:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:57:08,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 13:57:08,425 INFO L175 Difference]: Start difference. First operand has 386 places, 521 transitions, 9300 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:57:08,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 550 transitions, 10706 flow [2024-06-14 13:57:16,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 550 transitions, 10479 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 13:57:16,403 INFO L231 Difference]: Finished difference. Result has 391 places, 524 transitions, 9374 flow [2024-06-14 13:57:16,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9078, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9374, PETRI_PLACES=391, PETRI_TRANSITIONS=524} [2024-06-14 13:57:16,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-14 13:57:16,404 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 524 transitions, 9374 flow [2024-06-14 13:57:16,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:16,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:16,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:16,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:57:16,406 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 13:57:16,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:16,406 INFO L85 PathProgramCache]: Analyzing trace with hash 792392724, now seen corresponding path program 4 times [2024-06-14 13:57:16,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:16,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785701336] [2024-06-14 13:57:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:16,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:16,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:16,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785701336] [2024-06-14 13:57:16,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785701336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:16,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:16,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:57:16,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932874960] [2024-06-14 13:57:16,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:16,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:57:16,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:57:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:57:16,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:16,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 524 transitions, 9374 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:16,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:16,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:16,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:19,470 INFO L124 PetriNetUnfolderBase]: 6777/11593 cut-off events. [2024-06-14 13:57:19,471 INFO L125 PetriNetUnfolderBase]: For 2047425/2047425 co-relation queries the response was YES. [2024-06-14 13:57:19,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97874 conditions, 11593 events. 6777/11593 cut-off events. For 2047425/2047425 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 91177 event pairs, 2517 based on Foata normal form. 2/11590 useless extension candidates. Maximal degree in co-relation 97690. Up to 10518 conditions per place. [2024-06-14 13:57:19,655 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 431 selfloop transitions, 110 changer transitions 0/547 dead transitions. [2024-06-14 13:57:19,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 547 transitions, 10558 flow [2024-06-14 13:57:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:57:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:57:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:57:19,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:57:19,658 INFO L175 Difference]: Start difference. First operand has 391 places, 524 transitions, 9374 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:57:19,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 547 transitions, 10558 flow [2024-06-14 13:57:26,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 547 transitions, 10267 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:57:26,667 INFO L231 Difference]: Finished difference. Result has 394 places, 526 transitions, 9362 flow [2024-06-14 13:57:26,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9103, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9362, PETRI_PLACES=394, PETRI_TRANSITIONS=526} [2024-06-14 13:57:26,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-14 13:57:26,668 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 526 transitions, 9362 flow [2024-06-14 13:57:26,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:26,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:26,669 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 13:57:26,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:57:26,670 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 13:57:26,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:26,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1985645588, now seen corresponding path program 5 times [2024-06-14 13:57:26,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:26,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909593294] [2024-06-14 13:57:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:26,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:26,872 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 13:57:26,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:26,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909593294] [2024-06-14 13:57:26,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909593294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:26,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:26,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:57:26,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041038926] [2024-06-14 13:57:26,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:26,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:57:26,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:26,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:57:26,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:57:26,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:26,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 526 transitions, 9362 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:26,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:26,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:26,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:29,628 INFO L124 PetriNetUnfolderBase]: 6818/11632 cut-off events. [2024-06-14 13:57:29,629 INFO L125 PetriNetUnfolderBase]: For 2116866/2116866 co-relation queries the response was YES. [2024-06-14 13:57:29,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99099 conditions, 11632 events. 6818/11632 cut-off events. For 2116866/2116866 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 91344 event pairs, 2502 based on Foata normal form. 2/11617 useless extension candidates. Maximal degree in co-relation 98914. Up to 10444 conditions per place. [2024-06-14 13:57:29,965 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 431 selfloop transitions, 113 changer transitions 1/551 dead transitions. [2024-06-14 13:57:29,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 551 transitions, 10786 flow [2024-06-14 13:57:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:57:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:57:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:57:29,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 13:57:29,966 INFO L175 Difference]: Start difference. First operand has 394 places, 526 transitions, 9362 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:57:29,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 551 transitions, 10786 flow [2024-06-14 13:57:36,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 551 transitions, 10555 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:57:36,565 INFO L231 Difference]: Finished difference. Result has 397 places, 527 transitions, 9399 flow [2024-06-14 13:57:36,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9131, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9399, PETRI_PLACES=397, PETRI_TRANSITIONS=527} [2024-06-14 13:57:36,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-14 13:57:36,571 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 527 transitions, 9399 flow [2024-06-14 13:57:36,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:36,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:36,572 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 13:57:36,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:57:36,572 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 13:57:36,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:36,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1988502548, now seen corresponding path program 6 times [2024-06-14 13:57:36,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:36,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876812062] [2024-06-14 13:57:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:36,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:36,785 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 13:57:36,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:36,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876812062] [2024-06-14 13:57:36,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876812062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:36,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:36,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:57:36,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662539442] [2024-06-14 13:57:36,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:36,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:57:36,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:36,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:57:36,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:57:36,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:36,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 527 transitions, 9399 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:36,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:36,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:36,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:39,635 INFO L124 PetriNetUnfolderBase]: 6813/11653 cut-off events. [2024-06-14 13:57:39,635 INFO L125 PetriNetUnfolderBase]: For 2145665/2145665 co-relation queries the response was YES. [2024-06-14 13:57:39,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99427 conditions, 11653 events. 6813/11653 cut-off events. For 2145665/2145665 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 91710 event pairs, 2531 based on Foata normal form. 2/11650 useless extension candidates. Maximal degree in co-relation 99240. Up to 10574 conditions per place. [2024-06-14 13:57:39,848 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 433 selfloop transitions, 106 changer transitions 0/545 dead transitions. [2024-06-14 13:57:39,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 545 transitions, 10521 flow [2024-06-14 13:57:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:57:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:57:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 13:57:39,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:57:39,850 INFO L175 Difference]: Start difference. First operand has 397 places, 527 transitions, 9399 flow. Second operand 7 states and 161 transitions. [2024-06-14 13:57:39,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 545 transitions, 10521 flow [2024-06-14 13:57:48,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 545 transitions, 10295 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:57:48,466 INFO L231 Difference]: Finished difference. Result has 400 places, 527 transitions, 9390 flow [2024-06-14 13:57:48,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9173, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9390, PETRI_PLACES=400, PETRI_TRANSITIONS=527} [2024-06-14 13:57:48,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-14 13:57:48,467 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 527 transitions, 9390 flow [2024-06-14 13:57:48,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:48,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:48,468 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 13:57:48,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:57:48,468 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 13:57:48,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1834532974, now seen corresponding path program 1 times [2024-06-14 13:57:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:48,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031424239] [2024-06-14 13:57:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:48,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:48,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:48,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031424239] [2024-06-14 13:57:48,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031424239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:48,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:48,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:48,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576534527] [2024-06-14 13:57:48,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:48,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:48,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:48,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:48,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:48,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 527 transitions, 9390 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:48,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:48,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:48,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:51,641 INFO L124 PetriNetUnfolderBase]: 6849/11710 cut-off events. [2024-06-14 13:57:51,641 INFO L125 PetriNetUnfolderBase]: For 2230095/2230095 co-relation queries the response was YES. [2024-06-14 13:57:51,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99950 conditions, 11710 events. 6849/11710 cut-off events. For 2230095/2230095 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 92244 event pairs, 2533 based on Foata normal form. 10/11715 useless extension candidates. Maximal degree in co-relation 99762. Up to 10598 conditions per place. [2024-06-14 13:57:51,823 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 437 selfloop transitions, 111 changer transitions 0/554 dead transitions. [2024-06-14 13:57:51,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 554 transitions, 10594 flow [2024-06-14 13:57:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:57:51,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:57:51,825 INFO L175 Difference]: Start difference. First operand has 400 places, 527 transitions, 9390 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:57:51,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 554 transitions, 10594 flow [2024-06-14 13:57:59,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 554 transitions, 10371 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:57:59,695 INFO L231 Difference]: Finished difference. Result has 403 places, 529 transitions, 9435 flow [2024-06-14 13:57:59,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9167, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9435, PETRI_PLACES=403, PETRI_TRANSITIONS=529} [2024-06-14 13:57:59,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-14 13:57:59,695 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 529 transitions, 9435 flow [2024-06-14 13:57:59,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:59,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:59,696 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 13:57:59,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:57:59,696 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 13:57:59,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1184534897, now seen corresponding path program 1 times [2024-06-14 13:57:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:59,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593698196] [2024-06-14 13:57:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:59,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:59,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:59,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593698196] [2024-06-14 13:57:59,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593698196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:59,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:59,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:57:59,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362196070] [2024-06-14 13:57:59,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:59,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:57:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:57:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:57:59,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:59,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 529 transitions, 9435 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:59,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:59,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:59,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:02,840 INFO L124 PetriNetUnfolderBase]: 6886/11809 cut-off events. [2024-06-14 13:58:02,841 INFO L125 PetriNetUnfolderBase]: For 2242355/2242365 co-relation queries the response was YES. [2024-06-14 13:58:02,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101336 conditions, 11809 events. 6886/11809 cut-off events. For 2242355/2242365 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 93342 event pairs, 2620 based on Foata normal form. 11/11818 useless extension candidates. Maximal degree in co-relation 101147. Up to 10300 conditions per place. [2024-06-14 13:58:03,016 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 304 selfloop transitions, 256 changer transitions 0/566 dead transitions. [2024-06-14 13:58:03,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 566 transitions, 11320 flow [2024-06-14 13:58:03,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:58:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:58:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:58:03,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 13:58:03,017 INFO L175 Difference]: Start difference. First operand has 403 places, 529 transitions, 9435 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:58:03,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 566 transitions, 11320 flow [2024-06-14 13:58:10,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 566 transitions, 11078 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:10,776 INFO L231 Difference]: Finished difference. Result has 404 places, 544 transitions, 9994 flow [2024-06-14 13:58:10,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9193, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9994, PETRI_PLACES=404, PETRI_TRANSITIONS=544} [2024-06-14 13:58:10,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-14 13:58:10,777 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 544 transitions, 9994 flow [2024-06-14 13:58:10,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:10,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:10,777 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 13:58:10,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:58:10,777 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 13:58:10,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:10,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1854871973, now seen corresponding path program 2 times [2024-06-14 13:58:10,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:10,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132442016] [2024-06-14 13:58:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:10,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:11,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:11,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132442016] [2024-06-14 13:58:11,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132442016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:11,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:11,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:11,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693739906] [2024-06-14 13:58:11,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:11,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:11,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:11,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:11,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:11,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:11,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 544 transitions, 9994 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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 13:58:11,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:11,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:11,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:13,977 INFO L124 PetriNetUnfolderBase]: 6891/11771 cut-off events. [2024-06-14 13:58:13,978 INFO L125 PetriNetUnfolderBase]: For 2284449/2284449 co-relation queries the response was YES. [2024-06-14 13:58:14,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102057 conditions, 11771 events. 6891/11771 cut-off events. For 2284449/2284449 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 92629 event pairs, 2581 based on Foata normal form. 1/11767 useless extension candidates. Maximal degree in co-relation 101867. Up to 10306 conditions per place. [2024-06-14 13:58:14,159 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 272 changer transitions 0/573 dead transitions. [2024-06-14 13:58:14,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 573 transitions, 11669 flow [2024-06-14 13:58:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 13:58:14,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-14 13:58:14,160 INFO L175 Difference]: Start difference. First operand has 404 places, 544 transitions, 9994 flow. Second operand 8 states and 190 transitions. [2024-06-14 13:58:14,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 573 transitions, 11669 flow [2024-06-14 13:58:21,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 573 transitions, 11133 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:58:21,921 INFO L231 Difference]: Finished difference. Result has 408 places, 547 transitions, 10053 flow [2024-06-14 13:58:21,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9464, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10053, PETRI_PLACES=408, PETRI_TRANSITIONS=547} [2024-06-14 13:58:21,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-14 13:58:21,922 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 547 transitions, 10053 flow [2024-06-14 13:58:21,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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 13:58:21,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:21,922 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 13:58:21,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:58:21,923 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 13:58:21,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:21,923 INFO L85 PathProgramCache]: Analyzing trace with hash -258623923, now seen corresponding path program 3 times [2024-06-14 13:58:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:21,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647350521] [2024-06-14 13:58:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:21,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:22,100 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 13:58:22,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:22,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647350521] [2024-06-14 13:58:22,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647350521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:22,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:22,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:22,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717273640] [2024-06-14 13:58:22,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:22,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:22,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:22,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:22,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:22,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:22,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 547 transitions, 10053 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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 13:58:22,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:22,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:22,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:24,970 INFO L124 PetriNetUnfolderBase]: 6896/11781 cut-off events. [2024-06-14 13:58:24,970 INFO L125 PetriNetUnfolderBase]: For 2325083/2325083 co-relation queries the response was YES. [2024-06-14 13:58:25,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102589 conditions, 11781 events. 6896/11781 cut-off events. For 2325083/2325083 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 92761 event pairs, 2580 based on Foata normal form. 1/11777 useless extension candidates. Maximal degree in co-relation 102399. Up to 10312 conditions per place. [2024-06-14 13:58:25,367 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 275 changer transitions 0/576 dead transitions. [2024-06-14 13:58:25,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 576 transitions, 11742 flow [2024-06-14 13:58:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:58:25,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 13:58:25,368 INFO L175 Difference]: Start difference. First operand has 408 places, 547 transitions, 10053 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:58:25,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 576 transitions, 11742 flow [2024-06-14 13:58:34,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 576 transitions, 11350 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:58:34,611 INFO L231 Difference]: Finished difference. Result has 411 places, 550 transitions, 10266 flow [2024-06-14 13:58:34,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9664, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10266, PETRI_PLACES=411, PETRI_TRANSITIONS=550} [2024-06-14 13:58:34,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-14 13:58:34,612 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 550 transitions, 10266 flow [2024-06-14 13:58:34,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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 13:58:34,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:34,612 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 13:58:34,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:58:34,613 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 13:58:34,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:34,613 INFO L85 PathProgramCache]: Analyzing trace with hash -720679859, now seen corresponding path program 4 times [2024-06-14 13:58:34,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:34,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605479072] [2024-06-14 13:58:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:34,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:34,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:34,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605479072] [2024-06-14 13:58:34,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605479072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:34,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:34,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:58:34,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814356016] [2024-06-14 13:58:34,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:34,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:58:34,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:34,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:58:34,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:58:34,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:34,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 550 transitions, 10266 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:34,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:34,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:34,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:37,931 INFO L124 PetriNetUnfolderBase]: 6901/11816 cut-off events. [2024-06-14 13:58:37,931 INFO L125 PetriNetUnfolderBase]: For 2370631/2370641 co-relation queries the response was YES. [2024-06-14 13:58:38,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103158 conditions, 11816 events. 6901/11816 cut-off events. For 2370631/2370641 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 93285 event pairs, 2609 based on Foata normal form. 6/11820 useless extension candidates. Maximal degree in co-relation 102966. Up to 10318 conditions per place. [2024-06-14 13:58:38,103 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 258 changer transitions 0/573 dead transitions. [2024-06-14 13:58:38,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 573 transitions, 12176 flow [2024-06-14 13:58:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:58:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:58:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:58:38,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:58:38,104 INFO L175 Difference]: Start difference. First operand has 411 places, 550 transitions, 10266 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:58:38,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 573 transitions, 12176 flow [2024-06-14 13:58:45,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 573 transitions, 11608 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:45,444 INFO L231 Difference]: Finished difference. Result has 412 places, 553 transitions, 10288 flow [2024-06-14 13:58:45,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9704, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10288, PETRI_PLACES=412, PETRI_TRANSITIONS=553} [2024-06-14 13:58:45,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-14 13:58:45,445 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 553 transitions, 10288 flow [2024-06-14 13:58:45,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:45,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:45,445 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 13:58:45,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:58:45,445 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 13:58:45,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:45,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1683097253, now seen corresponding path program 5 times [2024-06-14 13:58:45,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:45,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61553213] [2024-06-14 13:58:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:45,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:45,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:45,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61553213] [2024-06-14 13:58:45,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61553213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:45,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:45,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:45,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941611904] [2024-06-14 13:58:45,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:45,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:45,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:45,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:45,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:45,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:45,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 553 transitions, 10288 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:45,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:45,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:45,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:48,796 INFO L124 PetriNetUnfolderBase]: 6906/11823 cut-off events. [2024-06-14 13:58:48,796 INFO L125 PetriNetUnfolderBase]: For 2409349/2409351 co-relation queries the response was YES. [2024-06-14 13:58:48,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103521 conditions, 11823 events. 6906/11823 cut-off events. For 2409349/2409351 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 93289 event pairs, 2495 based on Foata normal form. 3/11825 useless extension candidates. Maximal degree in co-relation 103328. Up to 10324 conditions per place. [2024-06-14 13:58:48,966 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 253 changer transitions 0/580 dead transitions. [2024-06-14 13:58:48,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 580 transitions, 12228 flow [2024-06-14 13:58:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:58:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:58:48,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:58:48,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 13:58:48,967 INFO L175 Difference]: Start difference. First operand has 412 places, 553 transitions, 10288 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:58:48,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 580 transitions, 12228 flow [2024-06-14 13:58:59,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 580 transitions, 11442 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:59,578 INFO L231 Difference]: Finished difference. Result has 415 places, 556 transitions, 10082 flow [2024-06-14 13:58:59,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9511, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10082, PETRI_PLACES=415, PETRI_TRANSITIONS=556} [2024-06-14 13:58:59,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-14 13:58:59,578 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 556 transitions, 10082 flow [2024-06-14 13:58:59,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:59,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:59,579 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 13:58:59,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:58:59,579 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 13:58:59,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:59,579 INFO L85 PathProgramCache]: Analyzing trace with hash -712426815, now seen corresponding path program 6 times [2024-06-14 13:58:59,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:59,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858751132] [2024-06-14 13:58:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:59,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:59,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:59,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858751132] [2024-06-14 13:58:59,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858751132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:59,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:59,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:58:59,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783443675] [2024-06-14 13:58:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:59,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:58:59,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:58:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:58:59,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:59,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 556 transitions, 10082 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:59,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:59,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:59,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:02,780 INFO L124 PetriNetUnfolderBase]: 6903/11821 cut-off events. [2024-06-14 13:59:02,780 INFO L125 PetriNetUnfolderBase]: For 2442933/2442943 co-relation queries the response was YES. [2024-06-14 13:59:02,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103539 conditions, 11821 events. 6903/11821 cut-off events. For 2442933/2442943 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 93316 event pairs, 2609 based on Foata normal form. 6/11825 useless extension candidates. Maximal degree in co-relation 103345. Up to 10321 conditions per place. [2024-06-14 13:59:02,959 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 325 selfloop transitions, 241 changer transitions 0/572 dead transitions. [2024-06-14 13:59:02,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 572 transitions, 11700 flow [2024-06-14 13:59:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:59:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:59:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 13:59:02,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:59:02,961 INFO L175 Difference]: Start difference. First operand has 415 places, 556 transitions, 10082 flow. Second operand 7 states and 161 transitions. [2024-06-14 13:59:02,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 572 transitions, 11700 flow [2024-06-14 13:59:11,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 572 transitions, 10991 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 13:59:11,188 INFO L231 Difference]: Finished difference. Result has 415 places, 556 transitions, 9861 flow [2024-06-14 13:59:11,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9373, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9861, PETRI_PLACES=415, PETRI_TRANSITIONS=556} [2024-06-14 13:59:11,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-14 13:59:11,189 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 556 transitions, 9861 flow [2024-06-14 13:59:11,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:11,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:11,189 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 13:59:11,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:59:11,189 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 13:59:11,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1198774536, now seen corresponding path program 1 times [2024-06-14 13:59:11,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:11,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449336527] [2024-06-14 13:59:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:11,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:11,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:11,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449336527] [2024-06-14 13:59:11,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449336527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:11,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:11,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:59:11,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474762698] [2024-06-14 13:59:11,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:11,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:59:11,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:11,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:59:11,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:59:11,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:11,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 556 transitions, 9861 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:11,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:11,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:11,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:15,086 INFO L124 PetriNetUnfolderBase]: 6939/11843 cut-off events. [2024-06-14 13:59:15,086 INFO L125 PetriNetUnfolderBase]: For 2541021/2541021 co-relation queries the response was YES. [2024-06-14 13:59:15,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103939 conditions, 11843 events. 6939/11843 cut-off events. For 2541021/2541021 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 93145 event pairs, 2579 based on Foata normal form. 10/11848 useless extension candidates. Maximal degree in co-relation 103746. Up to 10339 conditions per place. [2024-06-14 13:59:15,289 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 311 selfloop transitions, 268 changer transitions 0/585 dead transitions. [2024-06-14 13:59:15,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 585 transitions, 11598 flow [2024-06-14 13:59:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 13:59:15,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 13:59:15,290 INFO L175 Difference]: Start difference. First operand has 415 places, 556 transitions, 9861 flow. Second operand 8 states and 189 transitions. [2024-06-14 13:59:15,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 585 transitions, 11598 flow