./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe021_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/safe021_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/safe021_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe021_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 14:04:54,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:04:54,148 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:04:54,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:04:54,153 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:04:54,183 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:04:54,184 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:04:54,184 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:04:54,185 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:04:54,201 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:04:54,202 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:04:54,202 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:04:54,203 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:04:54,205 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:04:54,205 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:04:54,205 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:04:54,205 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:04:54,206 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:04:54,206 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:04:54,206 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:04:54,207 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:04:54,207 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:04:54,207 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:04:54,207 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:04:54,208 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:04:54,208 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:04:54,208 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:04:54,209 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:04:54,209 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:04:54,209 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:04:54,210 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:04:54,211 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:04:54,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:04:54,211 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:04:54,211 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:04:54,211 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:04:54,212 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:04:54,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:04:54,212 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:04:54,212 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:04:54,213 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:04:54,213 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:04:54,213 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:04:54,213 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:04:54,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:04:54,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:04:54,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:04:54,495 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:04:54,496 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:04:54,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe021_tso.yml/witness.yml [2024-06-14 14:04:54,653 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:04:54,654 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:04:54,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.i [2024-06-14 14:04:55,769 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:04:56,056 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:04:56,058 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.i [2024-06-14 14:04:56,071 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bef8de8fc/ce44c467f4cb454dbdc9602ef39f80ce/FLAGafdec29df [2024-06-14 14:04:56,086 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bef8de8fc/ce44c467f4cb454dbdc9602ef39f80ce [2024-06-14 14:04:56,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:04:56,089 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:04:56,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:04:56,091 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:04:56,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:04:56,096 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:04:54" (1/2) ... [2024-06-14 14:04:56,096 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6797f02f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:04:56, skipping insertion in model container [2024-06-14 14:04:56,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:04:54" (1/2) ... [2024-06-14 14:04:56,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d565311 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:04:56, skipping insertion in model container [2024-06-14 14:04:56,098 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:04:56" (2/2) ... [2024-06-14 14:04:56,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6797f02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56, skipping insertion in model container [2024-06-14 14:04:56,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:04:56" (2/2) ... [2024-06-14 14:04:56,099 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:04:56,144 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:04:56,146 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 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) && 0 <= z) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && y <= 1) && z <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 14:04:56,146 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 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) && 0 <= z) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && y <= 1) && z <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 14:04:56,147 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 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) && 0 <= z) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && y <= 1) && z <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 14:04:56,147 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:04:56,147 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-14 14:04:56,207 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:04:56,554 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:04:56,564 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 14:04:56,699 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:04:56,738 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:04:56,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56 WrapperNode [2024-06-14 14:04:56,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:04:56,739 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:04:56,740 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:04:56,740 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:04:56,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,760 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,797 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-14 14:04:56,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:04:56,800 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:04:56,800 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:04:56,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:04:56,808 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,812 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,826 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 14:04:56,827 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,827 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,834 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,836 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,837 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,839 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,842 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:04:56,843 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:04:56,843 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:04:56,843 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:04:56,844 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (1/1) ... [2024-06-14 14:04:56,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:04:56,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:04:56,871 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 14:04:56,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 14:04:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:04:56,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:04:56,927 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:04:56,927 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:04:56,927 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:04:56,928 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:04:56,928 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:04:56,928 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:04:56,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:04:56,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:04:56,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:04:56,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:04:56,930 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 14:04:57,068 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:04:57,070 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:04:57,426 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:04:57,427 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:04:57,597 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:04:57,597 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:04:57,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:04:57 BoogieIcfgContainer [2024-06-14 14:04:57,599 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:04:57,602 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:04:57,602 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:04:57,605 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:04:57,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:04:54" (1/4) ... [2024-06-14 14:04:57,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6ba3dd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:04:57, skipping insertion in model container [2024-06-14 14:04:57,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:04:56" (2/4) ... [2024-06-14 14:04:57,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6ba3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:04:57, skipping insertion in model container [2024-06-14 14:04:57,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:04:56" (3/4) ... [2024-06-14 14:04:57,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6ba3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:04:57, skipping insertion in model container [2024-06-14 14:04:57,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:04:57" (4/4) ... [2024-06-14 14:04:57,609 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_tso.i [2024-06-14 14:04:57,625 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:04:57,626 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 14:04:57,626 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:04:57,688 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:04:57,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 14:04:57,745 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 14:04:57,746 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:04:57,747 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 62 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 14:04:57,748 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 14:04:57,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 14:04:57,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:04:57,769 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;@d21d651, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:04:57,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 14:04:57,776 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:04:57,776 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:04:57,777 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:04:57,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:57,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:04:57,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:57,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1782945868, now seen corresponding path program 1 times [2024-06-14 14:04:57,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:57,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030304481] [2024-06-14 14:04:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:57,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:58,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:58,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030304481] [2024-06-14 14:04:58,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030304481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:58,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:58,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:04:58,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443874706] [2024-06-14 14:04:58,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:58,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:04:58,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:58,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:04:58,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:04:58,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-14 14:04:58,687 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 14:04:58,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:58,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-14 14:04:58,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:58,959 INFO L124 PetriNetUnfolderBase]: 606/1002 cut-off events. [2024-06-14 14:04:58,960 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 14:04:58,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2020 conditions, 1002 events. 606/1002 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4975 event pairs, 384 based on Foata normal form. 1/958 useless extension candidates. Maximal degree in co-relation 2005. Up to 941 conditions per place. [2024-06-14 14:04:58,975 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 14:04:58,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-14 14:04:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:04:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:04:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-14 14:04:58,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-14 14:04:58,988 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 82 transitions. [2024-06-14 14:04:58,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-14 14:04:58,991 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 14:04:58,995 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 14:04:58,997 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 14:04:59,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 14:04:59,002 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 14:04:59,003 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 14:04:59,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:59,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:59,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:04:59,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:59,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash 280983315, now seen corresponding path program 1 times [2024-06-14 14:04:59,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:59,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811371835] [2024-06-14 14:04:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:59,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:59,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:59,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811371835] [2024-06-14 14:04:59,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811371835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:59,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:59,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:04:59,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358423049] [2024-06-14 14:04:59,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:59,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:04:59,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:59,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:04:59,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:04:59,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:04:59,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:59,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:59,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:04:59,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:59,663 INFO L124 PetriNetUnfolderBase]: 767/1269 cut-off events. [2024-06-14 14:04:59,663 INFO L125 PetriNetUnfolderBase]: For 259/307 co-relation queries the response was YES. [2024-06-14 14:04:59,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2890 conditions, 1269 events. 767/1269 cut-off events. For 259/307 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6207 event pairs, 422 based on Foata normal form. 3/1241 useless extension candidates. Maximal degree in co-relation 2875. Up to 1158 conditions per place. [2024-06-14 14:04:59,674 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 14:04:59,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 252 flow [2024-06-14 14:04:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:04:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:04:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-14 14:04:59,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 14:04:59,678 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 104 transitions. [2024-06-14 14:04:59,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 252 flow [2024-06-14 14:04:59,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:04:59,682 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-14 14:04:59,682 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 14:04:59,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 14:04:59,683 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-14 14:04:59,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:59,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:59,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:59,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:04:59,687 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 14:04:59,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash 120548589, now seen corresponding path program 1 times [2024-06-14 14:04:59,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:59,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074729189] [2024-06-14 14:04:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:59,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:00,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:00,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074729189] [2024-06-14 14:05:00,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074729189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:00,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:00,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:00,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346016759] [2024-06-14 14:05:00,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:00,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:00,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:00,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:00,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:00,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 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 14:05:00,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:00,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:00,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:00,367 INFO L124 PetriNetUnfolderBase]: 775/1315 cut-off events. [2024-06-14 14:05:00,367 INFO L125 PetriNetUnfolderBase]: For 717/720 co-relation queries the response was YES. [2024-06-14 14:05:00,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3318 conditions, 1315 events. 775/1315 cut-off events. For 717/720 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6511 event pairs, 287 based on Foata normal form. 7/1318 useless extension candidates. Maximal degree in co-relation 3300. Up to 1104 conditions per place. [2024-06-14 14:05:00,376 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-14 14:05:00,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 406 flow [2024-06-14 14:05:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-14 14:05:00,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634146341463415 [2024-06-14 14:05:00,379 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 136 transitions. [2024-06-14 14:05:00,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 406 flow [2024-06-14 14:05:00,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 404 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:00,382 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 257 flow [2024-06-14 14:05:00,382 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=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-14 14:05:00,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-14 14:05:00,383 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 257 flow [2024-06-14 14:05:00,383 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 14:05:00,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:00,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:00,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:05:00,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:00,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:00,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1838225564, now seen corresponding path program 1 times [2024-06-14 14:05:00,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:00,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821383156] [2024-06-14 14:05:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:00,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:00,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:00,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821383156] [2024-06-14 14:05:00,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821383156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:00,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:00,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:00,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782092224] [2024-06-14 14:05:00,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:00,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:00,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:00,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:00,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:00,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:00,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 257 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:00,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:00,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:00,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:01,039 INFO L124 PetriNetUnfolderBase]: 787/1333 cut-off events. [2024-06-14 14:05:01,040 INFO L125 PetriNetUnfolderBase]: For 1671/1684 co-relation queries the response was YES. [2024-06-14 14:05:01,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4045 conditions, 1333 events. 787/1333 cut-off events. For 1671/1684 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6637 event pairs, 187 based on Foata normal form. 14/1343 useless extension candidates. Maximal degree in co-relation 4022. Up to 1072 conditions per place. [2024-06-14 14:05:01,049 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-14 14:05:01,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 519 flow [2024-06-14 14:05:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:05:01,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-14 14:05:01,051 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 257 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:05:01,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 519 flow [2024-06-14 14:05:01,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 509 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:01,057 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 309 flow [2024-06-14 14:05:01,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-14 14:05:01,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 14:05:01,058 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 309 flow [2024-06-14 14:05:01,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:01,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:01,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:01,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:05:01,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:01,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash -214679612, now seen corresponding path program 1 times [2024-06-14 14:05:01,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:01,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151671222] [2024-06-14 14:05:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:01,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:01,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:01,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151671222] [2024-06-14 14:05:01,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151671222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:01,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:01,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:05:01,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709239488] [2024-06-14 14:05:01,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:01,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:05:01,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:01,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:05:01,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:05:01,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-14 14:05:01,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:01,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:01,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-14 14:05:01,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:01,667 INFO L124 PetriNetUnfolderBase]: 716/1209 cut-off events. [2024-06-14 14:05:01,667 INFO L125 PetriNetUnfolderBase]: For 2280/2291 co-relation queries the response was YES. [2024-06-14 14:05:01,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 1209 events. 716/1209 cut-off events. For 2280/2291 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6029 event pairs, 247 based on Foata normal form. 3/1176 useless extension candidates. Maximal degree in co-relation 3986. Up to 1055 conditions per place. [2024-06-14 14:05:01,680 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 43 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-14 14:05:01,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 461 flow [2024-06-14 14:05:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 14:05:01,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 14:05:01,682 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 309 flow. Second operand 4 states and 102 transitions. [2024-06-14 14:05:01,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 461 flow [2024-06-14 14:05:01,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 417 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:01,691 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 320 flow [2024-06-14 14:05:01,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-14 14:05:01,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 14:05:01,694 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 320 flow [2024-06-14 14:05:01,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:01,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:01,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:01,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:05:01,696 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:01,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:01,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1934089472, now seen corresponding path program 1 times [2024-06-14 14:05:01,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:01,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087798324] [2024-06-14 14:05:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:01,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:02,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087798324] [2024-06-14 14:05:02,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087798324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:02,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:02,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:02,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763306377] [2024-06-14 14:05:02,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:02,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:02,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:02,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:02,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:02,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:02,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:02,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:02,401 INFO L124 PetriNetUnfolderBase]: 875/1473 cut-off events. [2024-06-14 14:05:02,401 INFO L125 PetriNetUnfolderBase]: For 3500/3518 co-relation queries the response was YES. [2024-06-14 14:05:02,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5007 conditions, 1473 events. 875/1473 cut-off events. For 3500/3518 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7511 event pairs, 318 based on Foata normal form. 2/1449 useless extension candidates. Maximal degree in co-relation 4980. Up to 1281 conditions per place. [2024-06-14 14:05:02,413 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 58 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2024-06-14 14:05:02,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 553 flow [2024-06-14 14:05:02,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 14:05:02,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 14:05:02,415 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 320 flow. Second operand 5 states and 120 transitions. [2024-06-14 14:05:02,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 553 flow [2024-06-14 14:05:02,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 523 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:02,422 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 399 flow [2024-06-14 14:05:02,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2024-06-14 14:05:02,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-14 14:05:02,425 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 399 flow [2024-06-14 14:05:02,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:02,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:02,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:05:02,426 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:02,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash -898835455, now seen corresponding path program 1 times [2024-06-14 14:05:02,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:02,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572610829] [2024-06-14 14:05:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:02,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:02,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:02,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572610829] [2024-06-14 14:05:02,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572610829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:02,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:02,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084213966] [2024-06-14 14:05:02,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:02,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:02,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:02,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:02,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:02,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 399 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:02,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:02,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:03,122 INFO L124 PetriNetUnfolderBase]: 875/1447 cut-off events. [2024-06-14 14:05:03,123 INFO L125 PetriNetUnfolderBase]: For 3885/3906 co-relation queries the response was YES. [2024-06-14 14:05:03,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5329 conditions, 1447 events. 875/1447 cut-off events. For 3885/3906 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7200 event pairs, 295 based on Foata normal form. 10/1445 useless extension candidates. Maximal degree in co-relation 5299. Up to 1240 conditions per place. [2024-06-14 14:05:03,140 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 21 changer transitions 0/89 dead transitions. [2024-06-14 14:05:03,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 651 flow [2024-06-14 14:05:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-14 14:05:03,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-14 14:05:03,142 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 399 flow. Second operand 5 states and 129 transitions. [2024-06-14 14:05:03,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 651 flow [2024-06-14 14:05:03,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 645 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:03,149 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 467 flow [2024-06-14 14:05:03,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=467, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-14 14:05:03,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-14 14:05:03,150 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 467 flow [2024-06-14 14:05:03,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:03,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:03,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:03,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:05:03,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:03,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:03,151 INFO L85 PathProgramCache]: Analyzing trace with hash -148644445, now seen corresponding path program 2 times [2024-06-14 14:05:03,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:03,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095121183] [2024-06-14 14:05:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:03,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:03,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:03,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095121183] [2024-06-14 14:05:03,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095121183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:03,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:03,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:03,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368970572] [2024-06-14 14:05:03,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:03,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:03,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:03,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:03,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:03,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:03,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 467 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:03,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:03,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:03,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:03,782 INFO L124 PetriNetUnfolderBase]: 885/1459 cut-off events. [2024-06-14 14:05:03,782 INFO L125 PetriNetUnfolderBase]: For 4833/4864 co-relation queries the response was YES. [2024-06-14 14:05:03,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5633 conditions, 1459 events. 885/1459 cut-off events. For 4833/4864 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7241 event pairs, 304 based on Foata normal form. 22/1468 useless extension candidates. Maximal degree in co-relation 5600. Up to 1255 conditions per place. [2024-06-14 14:05:03,795 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 22 changer transitions 0/84 dead transitions. [2024-06-14 14:05:03,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 653 flow [2024-06-14 14:05:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 14:05:03,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 14:05:03,797 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 467 flow. Second operand 5 states and 125 transitions. [2024-06-14 14:05:03,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 653 flow [2024-06-14 14:05:03,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 84 transitions, 626 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:03,806 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 493 flow [2024-06-14 14:05:03,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=493, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-14 14:05:03,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-14 14:05:03,807 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 493 flow [2024-06-14 14:05:03,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:03,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:03,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:03,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:05:03,808 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:03,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2101371457, now seen corresponding path program 1 times [2024-06-14 14:05:03,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:03,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123033227] [2024-06-14 14:05:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:03,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:04,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:04,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123033227] [2024-06-14 14:05:04,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123033227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:04,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:04,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:04,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152480678] [2024-06-14 14:05:04,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:04,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:04,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:04,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:04,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:04,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:04,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 493 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:04,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:04,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:04,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:04,429 INFO L124 PetriNetUnfolderBase]: 955/1556 cut-off events. [2024-06-14 14:05:04,430 INFO L125 PetriNetUnfolderBase]: For 6049/6049 co-relation queries the response was YES. [2024-06-14 14:05:04,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6082 conditions, 1556 events. 955/1556 cut-off events. For 6049/6049 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7591 event pairs, 306 based on Foata normal form. 4/1556 useless extension candidates. Maximal degree in co-relation 6048. Up to 1302 conditions per place. [2024-06-14 14:05:04,445 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 84 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-14 14:05:04,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 936 flow [2024-06-14 14:05:04,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:05:04,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-14 14:05:04,447 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 493 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:05:04,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 936 flow [2024-06-14 14:05:04,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 838 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:04,458 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 593 flow [2024-06-14 14:05:04,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=593, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-14 14:05:04,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-14 14:05:04,459 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 593 flow [2024-06-14 14:05:04,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:04,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:04,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:04,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:05:04,460 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:04,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:04,461 INFO L85 PathProgramCache]: Analyzing trace with hash 422211897, now seen corresponding path program 2 times [2024-06-14 14:05:04,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:04,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769487081] [2024-06-14 14:05:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:04,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:04,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:04,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769487081] [2024-06-14 14:05:04,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769487081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:04,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:04,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:04,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121433115] [2024-06-14 14:05:04,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:04,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:04,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:04,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:04,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:04,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 593 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:04,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:04,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:04,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:05,135 INFO L124 PetriNetUnfolderBase]: 966/1573 cut-off events. [2024-06-14 14:05:05,135 INFO L125 PetriNetUnfolderBase]: For 7351/7351 co-relation queries the response was YES. [2024-06-14 14:05:05,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6618 conditions, 1573 events. 966/1573 cut-off events. For 7351/7351 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7662 event pairs, 320 based on Foata normal form. 2/1570 useless extension candidates. Maximal degree in co-relation 6582. Up to 1309 conditions per place. [2024-06-14 14:05:05,150 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 80 selfloop transitions, 31 changer transitions 0/117 dead transitions. [2024-06-14 14:05:05,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 1019 flow [2024-06-14 14:05:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:05:05,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-14 14:05:05,152 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 593 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:05:05,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 1019 flow [2024-06-14 14:05:05,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 981 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:05,166 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 707 flow [2024-06-14 14:05:05,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=707, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2024-06-14 14:05:05,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-14 14:05:05,167 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 707 flow [2024-06-14 14:05:05,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:05,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:05,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:05,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:05:05,168 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:05,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:05,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1061061247, now seen corresponding path program 3 times [2024-06-14 14:05:05,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:05,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278619429] [2024-06-14 14:05:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:05,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:05,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:05,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278619429] [2024-06-14 14:05:05,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278619429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:05,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:05,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:05,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564366149] [2024-06-14 14:05:05,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:05,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:05,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:05,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:05,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:05,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 707 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:05,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:05,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:05,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:05,789 INFO L124 PetriNetUnfolderBase]: 961/1563 cut-off events. [2024-06-14 14:05:05,789 INFO L125 PetriNetUnfolderBase]: For 8728/8728 co-relation queries the response was YES. [2024-06-14 14:05:05,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6846 conditions, 1563 events. 961/1563 cut-off events. For 8728/8728 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7619 event pairs, 320 based on Foata normal form. 2/1559 useless extension candidates. Maximal degree in co-relation 6808. Up to 1306 conditions per place. [2024-06-14 14:05:05,803 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 79 selfloop transitions, 30 changer transitions 0/115 dead transitions. [2024-06-14 14:05:05,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 115 transitions, 1029 flow [2024-06-14 14:05:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:05,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:05:05,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 14:05:05,805 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 707 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:05:05,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 115 transitions, 1029 flow [2024-06-14 14:05:05,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 115 transitions, 1017 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:05,831 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 763 flow [2024-06-14 14:05:05,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=763, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-06-14 14:05:05,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-14 14:05:05,832 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 763 flow [2024-06-14 14:05:05,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:05,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:05,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:05,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:05:05,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:05,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1916716469, now seen corresponding path program 1 times [2024-06-14 14:05:05,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:05,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733665227] [2024-06-14 14:05:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:05,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:06,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733665227] [2024-06-14 14:05:06,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733665227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:06,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:06,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:06,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817868012] [2024-06-14 14:05:06,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:06,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:06,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:06,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:06,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:06,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 763 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:06,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:06,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:06,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:06,503 INFO L124 PetriNetUnfolderBase]: 886/1489 cut-off events. [2024-06-14 14:05:06,503 INFO L125 PetriNetUnfolderBase]: For 10182/10182 co-relation queries the response was YES. [2024-06-14 14:05:06,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6739 conditions, 1489 events. 886/1489 cut-off events. For 10182/10182 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7467 event pairs, 262 based on Foata normal form. 4/1492 useless extension candidates. Maximal degree in co-relation 6698. Up to 1267 conditions per place. [2024-06-14 14:05:06,520 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 88 selfloop transitions, 12 changer transitions 0/114 dead transitions. [2024-06-14 14:05:06,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 114 transitions, 1027 flow [2024-06-14 14:05:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 14:05:06,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 14:05:06,523 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 763 flow. Second operand 6 states and 141 transitions. [2024-06-14 14:05:06,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 114 transitions, 1027 flow [2024-06-14 14:05:06,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 114 transitions, 962 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:06,540 INFO L231 Difference]: Finished difference. Result has 87 places, 94 transitions, 747 flow [2024-06-14 14:05:06,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=747, PETRI_PLACES=87, PETRI_TRANSITIONS=94} [2024-06-14 14:05:06,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-14 14:05:06,542 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 94 transitions, 747 flow [2024-06-14 14:05:06,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:06,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:06,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:06,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:05:06,542 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:06,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:06,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1267538997, now seen corresponding path program 1 times [2024-06-14 14:05:06,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:06,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119937826] [2024-06-14 14:05:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:06,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:06,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:06,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119937826] [2024-06-14 14:05:06,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119937826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:06,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:06,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:06,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899192369] [2024-06-14 14:05:06,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:06,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:06,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:06,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:06,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:06,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:06,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 94 transitions, 747 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 14:05:06,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:06,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:06,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:07,221 INFO L124 PetriNetUnfolderBase]: 980/1605 cut-off events. [2024-06-14 14:05:07,221 INFO L125 PetriNetUnfolderBase]: For 11455/11455 co-relation queries the response was YES. [2024-06-14 14:05:07,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7358 conditions, 1605 events. 980/1605 cut-off events. For 11455/11455 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7912 event pairs, 302 based on Foata normal form. 2/1603 useless extension candidates. Maximal degree in co-relation 7316. Up to 1323 conditions per place. [2024-06-14 14:05:07,236 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 89 selfloop transitions, 33 changer transitions 0/128 dead transitions. [2024-06-14 14:05:07,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 1213 flow [2024-06-14 14:05:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:05:07,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 14:05:07,239 INFO L175 Difference]: Start difference. First operand has 87 places, 94 transitions, 747 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:05:07,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 1213 flow [2024-06-14 14:05:07,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 128 transitions, 1182 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:07,262 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 863 flow [2024-06-14 14:05:07,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=863, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2024-06-14 14:05:07,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-14 14:05:07,264 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 863 flow [2024-06-14 14:05:07,264 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 14:05:07,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:07,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:07,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:05:07,265 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:07,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:07,265 INFO L85 PathProgramCache]: Analyzing trace with hash -492411141, now seen corresponding path program 2 times [2024-06-14 14:05:07,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:07,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676224036] [2024-06-14 14:05:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:07,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:07,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:07,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676224036] [2024-06-14 14:05:07,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676224036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:07,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:07,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:07,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263884606] [2024-06-14 14:05:07,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:07,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:07,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:07,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:07,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:07,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 863 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 14:05:07,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:07,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:07,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:07,952 INFO L124 PetriNetUnfolderBase]: 975/1598 cut-off events. [2024-06-14 14:05:07,952 INFO L125 PetriNetUnfolderBase]: For 12945/12945 co-relation queries the response was YES. [2024-06-14 14:05:07,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7578 conditions, 1598 events. 975/1598 cut-off events. For 12945/12945 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7907 event pairs, 302 based on Foata normal form. 2/1596 useless extension candidates. Maximal degree in co-relation 7534. Up to 1318 conditions per place. [2024-06-14 14:05:07,966 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 87 selfloop transitions, 37 changer transitions 0/130 dead transitions. [2024-06-14 14:05:07,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 130 transitions, 1248 flow [2024-06-14 14:05:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:07,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 14:05:07,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-14 14:05:07,968 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 863 flow. Second operand 6 states and 151 transitions. [2024-06-14 14:05:07,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 130 transitions, 1248 flow [2024-06-14 14:05:07,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 130 transitions, 1206 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:07,995 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 943 flow [2024-06-14 14:05:07,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=943, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-06-14 14:05:07,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 14:05:07,996 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 943 flow [2024-06-14 14:05:07,996 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 14:05:07,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:07,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:07,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:05:07,997 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:07,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1105999029, now seen corresponding path program 3 times [2024-06-14 14:05:07,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:07,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45964343] [2024-06-14 14:05:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:07,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:08,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:08,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45964343] [2024-06-14 14:05:08,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45964343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:08,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:08,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:08,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091670558] [2024-06-14 14:05:08,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:08,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:08,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:08,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:08,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:08,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 943 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 14:05:08,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:08,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:08,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:08,630 INFO L124 PetriNetUnfolderBase]: 970/1594 cut-off events. [2024-06-14 14:05:08,630 INFO L125 PetriNetUnfolderBase]: For 15340/15343 co-relation queries the response was YES. [2024-06-14 14:05:08,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7762 conditions, 1594 events. 970/1594 cut-off events. For 15340/15343 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7920 event pairs, 328 based on Foata normal form. 4/1590 useless extension candidates. Maximal degree in co-relation 7716. Up to 1313 conditions per place. [2024-06-14 14:05:08,644 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 84 selfloop transitions, 33 changer transitions 0/123 dead transitions. [2024-06-14 14:05:08,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 1236 flow [2024-06-14 14:05:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 14:05:08,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 14:05:08,646 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 943 flow. Second operand 6 states and 141 transitions. [2024-06-14 14:05:08,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 1236 flow [2024-06-14 14:05:08,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 123 transitions, 1186 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:08,669 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 978 flow [2024-06-14 14:05:08,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=978, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-06-14 14:05:08,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-14 14:05:08,671 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 978 flow [2024-06-14 14:05:08,671 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 14:05:08,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:08,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:08,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:05:08,672 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 14:05:08,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash -130792418, now seen corresponding path program 1 times [2024-06-14 14:05:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:08,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8039650] [2024-06-14 14:05:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:09,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:09,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8039650] [2024-06-14 14:05:09,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8039650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:09,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:09,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:09,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632338286] [2024-06-14 14:05:09,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:09,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:09,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:09,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:09,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:09,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:09,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 978 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:09,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:09,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:09,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:09,387 INFO L124 PetriNetUnfolderBase]: 942/1563 cut-off events. [2024-06-14 14:05:09,387 INFO L125 PetriNetUnfolderBase]: For 18113/18121 co-relation queries the response was YES. [2024-06-14 14:05:09,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7879 conditions, 1563 events. 942/1563 cut-off events. For 18113/18121 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7936 event pairs, 168 based on Foata normal form. 10/1525 useless extension candidates. Maximal degree in co-relation 7832. Up to 1184 conditions per place. [2024-06-14 14:05:09,401 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 83 selfloop transitions, 30 changer transitions 0/134 dead transitions. [2024-06-14 14:05:09,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 134 transitions, 1356 flow [2024-06-14 14:05:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 14:05:09,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 14:05:09,403 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 978 flow. Second operand 6 states and 150 transitions. [2024-06-14 14:05:09,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 134 transitions, 1356 flow [2024-06-14 14:05:09,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 134 transitions, 1305 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:09,428 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 1026 flow [2024-06-14 14:05:09,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1026, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-14 14:05:09,429 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 14:05:09,430 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 1026 flow [2024-06-14 14:05:09,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:09,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:09,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:09,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:05:09,430 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:09,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:09,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1799828976, now seen corresponding path program 2 times [2024-06-14 14:05:09,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:09,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231155198] [2024-06-14 14:05:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:09,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:09,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:09,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231155198] [2024-06-14 14:05:09,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231155198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:09,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:09,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:09,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711122465] [2024-06-14 14:05:09,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:09,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:09,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:09,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:09,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:09,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:09,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 1026 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:09,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:09,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:09,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:10,122 INFO L124 PetriNetUnfolderBase]: 930/1543 cut-off events. [2024-06-14 14:05:10,122 INFO L125 PetriNetUnfolderBase]: For 20066/20081 co-relation queries the response was YES. [2024-06-14 14:05:10,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7967 conditions, 1543 events. 930/1543 cut-off events. For 20066/20081 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7803 event pairs, 235 based on Foata normal form. 8/1502 useless extension candidates. Maximal degree in co-relation 7918. Up to 1252 conditions per place. [2024-06-14 14:05:10,136 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 79 selfloop transitions, 31 changer transitions 0/131 dead transitions. [2024-06-14 14:05:10,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 131 transitions, 1304 flow [2024-06-14 14:05:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:05:10,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-14 14:05:10,138 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 1026 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:05:10,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 131 transitions, 1304 flow [2024-06-14 14:05:10,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 131 transitions, 1261 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:10,168 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 1053 flow [2024-06-14 14:05:10,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1053, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-06-14 14:05:10,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-14 14:05:10,169 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 1053 flow [2024-06-14 14:05:10,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:10,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:10,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:10,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:05:10,170 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 14:05:10,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:10,170 INFO L85 PathProgramCache]: Analyzing trace with hash -631058998, now seen corresponding path program 1 times [2024-06-14 14:05:10,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:10,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146830712] [2024-06-14 14:05:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:10,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:10,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:10,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146830712] [2024-06-14 14:05:10,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146830712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:10,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:10,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:10,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998457928] [2024-06-14 14:05:10,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:10,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:10,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:10,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:10,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:10,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:10,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 1053 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:10,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:10,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:10,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:10,927 INFO L124 PetriNetUnfolderBase]: 1057/1736 cut-off events. [2024-06-14 14:05:10,928 INFO L125 PetriNetUnfolderBase]: For 22650/22650 co-relation queries the response was YES. [2024-06-14 14:05:10,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8666 conditions, 1736 events. 1057/1736 cut-off events. For 22650/22650 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8797 event pairs, 275 based on Foata normal form. 20/1752 useless extension candidates. Maximal degree in co-relation 8615. Up to 1348 conditions per place. [2024-06-14 14:05:10,944 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 37 changer transitions 0/140 dead transitions. [2024-06-14 14:05:10,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 140 transitions, 1419 flow [2024-06-14 14:05:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 14:05:10,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 14:05:10,946 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 1053 flow. Second operand 7 states and 169 transitions. [2024-06-14 14:05:10,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 140 transitions, 1419 flow [2024-06-14 14:05:10,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 140 transitions, 1348 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:10,980 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 1084 flow [2024-06-14 14:05:10,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1084, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2024-06-14 14:05:10,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-14 14:05:10,981 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 1084 flow [2024-06-14 14:05:10,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:10,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:10,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:10,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:05:10,982 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:10,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:10,982 INFO L85 PathProgramCache]: Analyzing trace with hash 73776520, now seen corresponding path program 2 times [2024-06-14 14:05:10,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:10,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668735608] [2024-06-14 14:05:10,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:10,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:11,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:11,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668735608] [2024-06-14 14:05:11,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668735608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:11,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:11,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:11,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265176518] [2024-06-14 14:05:11,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:11,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:11,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:11,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:11,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:11,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 1084 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:11,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:11,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:11,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:11,716 INFO L124 PetriNetUnfolderBase]: 1074/1753 cut-off events. [2024-06-14 14:05:11,716 INFO L125 PetriNetUnfolderBase]: For 22920/22920 co-relation queries the response was YES. [2024-06-14 14:05:11,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9051 conditions, 1753 events. 1074/1753 cut-off events. For 22920/22920 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8787 event pairs, 301 based on Foata normal form. 4/1750 useless extension candidates. Maximal degree in co-relation 8999. Up to 1467 conditions per place. [2024-06-14 14:05:11,732 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 89 selfloop transitions, 41 changer transitions 0/136 dead transitions. [2024-06-14 14:05:11,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 136 transitions, 1424 flow [2024-06-14 14:05:11,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 14:05:11,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:05:11,736 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 1084 flow. Second operand 7 states and 164 transitions. [2024-06-14 14:05:11,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 136 transitions, 1424 flow [2024-06-14 14:05:11,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 136 transitions, 1344 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:11,774 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 1117 flow [2024-06-14 14:05:11,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1117, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-06-14 14:05:11,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-14 14:05:11,774 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 1117 flow [2024-06-14 14:05:11,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:11,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:11,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:11,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:05:11,775 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:11,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash 340003724, now seen corresponding path program 3 times [2024-06-14 14:05:11,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:11,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685001044] [2024-06-14 14:05:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:11,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:12,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:12,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685001044] [2024-06-14 14:05:12,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685001044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:12,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:12,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:12,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695621789] [2024-06-14 14:05:12,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:12,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:12,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:12,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:12,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:12,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:12,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 1117 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:12,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:12,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:12,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:12,495 INFO L124 PetriNetUnfolderBase]: 1091/1780 cut-off events. [2024-06-14 14:05:12,495 INFO L125 PetriNetUnfolderBase]: For 25266/25266 co-relation queries the response was YES. [2024-06-14 14:05:12,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9378 conditions, 1780 events. 1091/1780 cut-off events. For 25266/25266 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8949 event pairs, 306 based on Foata normal form. 4/1777 useless extension candidates. Maximal degree in co-relation 9325. Up to 1494 conditions per place. [2024-06-14 14:05:12,514 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 40 changer transitions 0/138 dead transitions. [2024-06-14 14:05:12,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 138 transitions, 1465 flow [2024-06-14 14:05:12,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 14:05:12,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:05:12,516 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 1117 flow. Second operand 7 states and 164 transitions. [2024-06-14 14:05:12,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 138 transitions, 1465 flow [2024-06-14 14:05:12,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 138 transitions, 1370 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:12,556 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 1137 flow [2024-06-14 14:05:12,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1137, PETRI_PLACES=111, PETRI_TRANSITIONS=114} [2024-06-14 14:05:12,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-14 14:05:12,557 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 1137 flow [2024-06-14 14:05:12,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:12,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:12,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:12,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:05:12,558 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:12,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:12,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1536095778, now seen corresponding path program 4 times [2024-06-14 14:05:12,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:12,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537402954] [2024-06-14 14:05:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:12,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:12,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:12,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537402954] [2024-06-14 14:05:12,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537402954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:12,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:12,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:12,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671783758] [2024-06-14 14:05:12,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:12,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:12,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:12,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:12,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 114 transitions, 1137 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:12,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:12,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:12,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:13,297 INFO L124 PetriNetUnfolderBase]: 1083/1768 cut-off events. [2024-06-14 14:05:13,298 INFO L125 PetriNetUnfolderBase]: For 27028/27028 co-relation queries the response was YES. [2024-06-14 14:05:13,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9406 conditions, 1768 events. 1083/1768 cut-off events. For 27028/27028 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8866 event pairs, 263 based on Foata normal form. 4/1765 useless extension candidates. Maximal degree in co-relation 9352. Up to 1313 conditions per place. [2024-06-14 14:05:13,314 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 90 selfloop transitions, 48 changer transitions 0/144 dead transitions. [2024-06-14 14:05:13,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 144 transitions, 1517 flow [2024-06-14 14:05:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:13,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:05:13,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 14:05:13,316 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 1137 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:05:13,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 144 transitions, 1517 flow [2024-06-14 14:05:13,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 144 transitions, 1420 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:13,353 INFO L231 Difference]: Finished difference. Result has 113 places, 116 transitions, 1175 flow [2024-06-14 14:05:13,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1175, PETRI_PLACES=113, PETRI_TRANSITIONS=116} [2024-06-14 14:05:13,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-14 14:05:13,354 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 116 transitions, 1175 flow [2024-06-14 14:05:13,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:13,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:13,355 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 14:05:13,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:05:13,355 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:13,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:13,355 INFO L85 PathProgramCache]: Analyzing trace with hash 240403600, now seen corresponding path program 1 times [2024-06-14 14:05:13,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:13,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217544411] [2024-06-14 14:05:13,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:13,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:13,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:13,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217544411] [2024-06-14 14:05:13,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217544411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:13,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:13,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:13,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485313496] [2024-06-14 14:05:13,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:13,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:13,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:13,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:13,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:13,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:13,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 1175 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 14:05:13,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:13,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:13,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:14,191 INFO L124 PetriNetUnfolderBase]: 1185/1964 cut-off events. [2024-06-14 14:05:14,192 INFO L125 PetriNetUnfolderBase]: For 34080/34080 co-relation queries the response was YES. [2024-06-14 14:05:14,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10499 conditions, 1964 events. 1185/1964 cut-off events. For 34080/34080 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10346 event pairs, 218 based on Foata normal form. 12/1972 useless extension candidates. Maximal degree in co-relation 10444. Up to 1172 conditions per place. [2024-06-14 14:05:14,210 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 115 selfloop transitions, 38 changer transitions 0/159 dead transitions. [2024-06-14 14:05:14,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 159 transitions, 1726 flow [2024-06-14 14:05:14,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:05:14,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 14:05:14,212 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 1175 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:05:14,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 159 transitions, 1726 flow [2024-06-14 14:05:14,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 159 transitions, 1609 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:14,258 INFO L231 Difference]: Finished difference. Result has 117 places, 121 transitions, 1219 flow [2024-06-14 14:05:14,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1219, PETRI_PLACES=117, PETRI_TRANSITIONS=121} [2024-06-14 14:05:14,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-14 14:05:14,259 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 121 transitions, 1219 flow [2024-06-14 14:05:14,259 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 14:05:14,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:14,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:14,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:05:14,260 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:14,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:14,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1667743104, now seen corresponding path program 2 times [2024-06-14 14:05:14,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:14,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379329186] [2024-06-14 14:05:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:14,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:14,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:14,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379329186] [2024-06-14 14:05:14,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379329186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:14,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:14,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:14,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346865164] [2024-06-14 14:05:14,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:14,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:14,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:14,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:14,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:14,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:14,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 121 transitions, 1219 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 14:05:14,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:14,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:14,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:15,079 INFO L124 PetriNetUnfolderBase]: 1226/2053 cut-off events. [2024-06-14 14:05:15,079 INFO L125 PetriNetUnfolderBase]: For 37341/37341 co-relation queries the response was YES. [2024-06-14 14:05:15,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10924 conditions, 2053 events. 1226/2053 cut-off events. For 37341/37341 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11008 event pairs, 306 based on Foata normal form. 12/2061 useless extension candidates. Maximal degree in co-relation 10866. Up to 1548 conditions per place. [2024-06-14 14:05:15,101 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 112 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-14 14:05:15,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 157 transitions, 1652 flow [2024-06-14 14:05:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:05:15,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 14:05:15,103 INFO L175 Difference]: Start difference. First operand has 117 places, 121 transitions, 1219 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:05:15,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 157 transitions, 1652 flow [2024-06-14 14:05:15,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 157 transitions, 1597 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:15,174 INFO L231 Difference]: Finished difference. Result has 123 places, 124 transitions, 1298 flow [2024-06-14 14:05:15,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1298, PETRI_PLACES=123, PETRI_TRANSITIONS=124} [2024-06-14 14:05:15,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-14 14:05:15,175 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 124 transitions, 1298 flow [2024-06-14 14:05:15,175 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 14:05:15,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:15,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:15,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:05:15,176 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:15,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:15,177 INFO L85 PathProgramCache]: Analyzing trace with hash -760816356, now seen corresponding path program 3 times [2024-06-14 14:05:15,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:15,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972431917] [2024-06-14 14:05:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:15,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:15,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:15,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972431917] [2024-06-14 14:05:15,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972431917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:15,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:15,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:15,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563282493] [2024-06-14 14:05:15,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:15,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:15,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:15,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:15,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:15,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 124 transitions, 1298 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 14:05:15,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:15,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:15,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:15,946 INFO L124 PetriNetUnfolderBase]: 1328/2237 cut-off events. [2024-06-14 14:05:15,946 INFO L125 PetriNetUnfolderBase]: For 44822/44822 co-relation queries the response was YES. [2024-06-14 14:05:15,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12213 conditions, 2237 events. 1328/2237 cut-off events. For 44822/44822 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12341 event pairs, 271 based on Foata normal form. 12/2245 useless extension candidates. Maximal degree in co-relation 12152. Up to 1654 conditions per place. [2024-06-14 14:05:15,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 41 changer transitions 0/165 dead transitions. [2024-06-14 14:05:15,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 165 transitions, 1855 flow [2024-06-14 14:05:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:05:15,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 14:05:15,967 INFO L175 Difference]: Start difference. First operand has 123 places, 124 transitions, 1298 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:05:15,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 165 transitions, 1855 flow [2024-06-14 14:05:16,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 165 transitions, 1796 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:16,047 INFO L231 Difference]: Finished difference. Result has 128 places, 127 transitions, 1384 flow [2024-06-14 14:05:16,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1384, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2024-06-14 14:05:16,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-14 14:05:16,048 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 1384 flow [2024-06-14 14:05:16,048 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 14:05:16,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:16,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:16,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:05:16,049 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:16,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:16,049 INFO L85 PathProgramCache]: Analyzing trace with hash -760812636, now seen corresponding path program 4 times [2024-06-14 14:05:16,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:16,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514603036] [2024-06-14 14:05:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:16,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:16,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:16,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514603036] [2024-06-14 14:05:16,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514603036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:16,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:16,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:16,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569422844] [2024-06-14 14:05:16,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:16,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:16,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:16,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:16,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:16,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:16,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 1384 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 14:05:16,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:16,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:16,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:16,888 INFO L124 PetriNetUnfolderBase]: 1386/2335 cut-off events. [2024-06-14 14:05:16,888 INFO L125 PetriNetUnfolderBase]: For 50249/50249 co-relation queries the response was YES. [2024-06-14 14:05:16,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12974 conditions, 2335 events. 1386/2335 cut-off events. For 50249/50249 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13099 event pairs, 376 based on Foata normal form. 16/2347 useless extension candidates. Maximal degree in co-relation 12910. Up to 1925 conditions per place. [2024-06-14 14:05:16,912 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 116 selfloop transitions, 39 changer transitions 0/161 dead transitions. [2024-06-14 14:05:16,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 161 transitions, 1806 flow [2024-06-14 14:05:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:05:16,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 14:05:16,914 INFO L175 Difference]: Start difference. First operand has 128 places, 127 transitions, 1384 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:05:16,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 161 transitions, 1806 flow [2024-06-14 14:05:16,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 161 transitions, 1743 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:16,999 INFO L231 Difference]: Finished difference. Result has 132 places, 128 transitions, 1430 flow [2024-06-14 14:05:16,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1430, PETRI_PLACES=132, PETRI_TRANSITIONS=128} [2024-06-14 14:05:16,999 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-14 14:05:17,000 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 128 transitions, 1430 flow [2024-06-14 14:05:17,000 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 14:05:17,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:17,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:17,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:05:17,001 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:17,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -755306106, now seen corresponding path program 5 times [2024-06-14 14:05:17,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:17,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911140206] [2024-06-14 14:05:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:17,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:17,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911140206] [2024-06-14 14:05:17,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911140206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:17,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:17,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:17,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688365661] [2024-06-14 14:05:17,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:17,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:17,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:17,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:17,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:17,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:17,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 128 transitions, 1430 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 14:05:17,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:17,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:17,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:17,798 INFO L124 PetriNetUnfolderBase]: 1444/2433 cut-off events. [2024-06-14 14:05:17,799 INFO L125 PetriNetUnfolderBase]: For 54096/54096 co-relation queries the response was YES. [2024-06-14 14:05:17,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13591 conditions, 2433 events. 1444/2433 cut-off events. For 54096/54096 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13872 event pairs, 386 based on Foata normal form. 16/2445 useless extension candidates. Maximal degree in co-relation 13525. Up to 2023 conditions per place. [2024-06-14 14:05:17,823 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 117 selfloop transitions, 36 changer transitions 0/159 dead transitions. [2024-06-14 14:05:17,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 159 transitions, 1840 flow [2024-06-14 14:05:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:05:17,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 14:05:17,825 INFO L175 Difference]: Start difference. First operand has 132 places, 128 transitions, 1430 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:05:17,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 159 transitions, 1840 flow [2024-06-14 14:05:17,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 159 transitions, 1755 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:17,930 INFO L231 Difference]: Finished difference. Result has 134 places, 129 transitions, 1448 flow [2024-06-14 14:05:17,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1448, PETRI_PLACES=134, PETRI_TRANSITIONS=129} [2024-06-14 14:05:17,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-14 14:05:17,931 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 129 transitions, 1448 flow [2024-06-14 14:05:17,931 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 14:05:17,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:17,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:17,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:05:17,931 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:17,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:17,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1912008618, now seen corresponding path program 1 times [2024-06-14 14:05:17,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:17,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528733318] [2024-06-14 14:05:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:17,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:18,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528733318] [2024-06-14 14:05:18,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528733318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:18,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702746045] [2024-06-14 14:05:18,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:18,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:18,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:18,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:18,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:18,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 129 transitions, 1448 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 14:05:18,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:18,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:18,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:18,766 INFO L124 PetriNetUnfolderBase]: 1485/2514 cut-off events. [2024-06-14 14:05:18,767 INFO L125 PetriNetUnfolderBase]: For 56883/56883 co-relation queries the response was YES. [2024-06-14 14:05:18,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13989 conditions, 2514 events. 1485/2514 cut-off events. For 56883/56883 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14506 event pairs, 382 based on Foata normal form. 12/2522 useless extension candidates. Maximal degree in co-relation 13922. Up to 1795 conditions per place. [2024-06-14 14:05:18,793 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 117 selfloop transitions, 40 changer transitions 0/163 dead transitions. [2024-06-14 14:05:18,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 163 transitions, 1875 flow [2024-06-14 14:05:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 14:05:18,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 14:05:18,796 INFO L175 Difference]: Start difference. First operand has 134 places, 129 transitions, 1448 flow. Second operand 7 states and 169 transitions. [2024-06-14 14:05:18,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 163 transitions, 1875 flow [2024-06-14 14:05:18,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 1794 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:18,913 INFO L231 Difference]: Finished difference. Result has 136 places, 130 transitions, 1477 flow [2024-06-14 14:05:18,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1477, PETRI_PLACES=136, PETRI_TRANSITIONS=130} [2024-06-14 14:05:18,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-14 14:05:18,914 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 130 transitions, 1477 flow [2024-06-14 14:05:18,914 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 14:05:18,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:18,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:18,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:05:18,915 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:18,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -484604352, now seen corresponding path program 1 times [2024-06-14 14:05:18,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:18,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522721991] [2024-06-14 14:05:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:19,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:19,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522721991] [2024-06-14 14:05:19,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522721991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:19,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:19,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:19,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292097651] [2024-06-14 14:05:19,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:19,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:19,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:19,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:19,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 130 transitions, 1477 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:19,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:19,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:19,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:19,760 INFO L124 PetriNetUnfolderBase]: 1490/2521 cut-off events. [2024-06-14 14:05:19,760 INFO L125 PetriNetUnfolderBase]: For 56108/56108 co-relation queries the response was YES. [2024-06-14 14:05:19,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14166 conditions, 2521 events. 1490/2521 cut-off events. For 56108/56108 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14517 event pairs, 394 based on Foata normal form. 1/2521 useless extension candidates. Maximal degree in co-relation 14098. Up to 2317 conditions per place. [2024-06-14 14:05:19,781 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 127 selfloop transitions, 19 changer transitions 0/152 dead transitions. [2024-06-14 14:05:19,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 152 transitions, 1931 flow [2024-06-14 14:05:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 14:05:19,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 14:05:19,783 INFO L175 Difference]: Start difference. First operand has 136 places, 130 transitions, 1477 flow. Second operand 5 states and 120 transitions. [2024-06-14 14:05:19,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 152 transitions, 1931 flow [2024-06-14 14:05:19,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 152 transitions, 1840 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:19,878 INFO L231 Difference]: Finished difference. Result has 136 places, 136 transitions, 1504 flow [2024-06-14 14:05:19,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1504, PETRI_PLACES=136, PETRI_TRANSITIONS=136} [2024-06-14 14:05:19,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-14 14:05:19,879 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 136 transitions, 1504 flow [2024-06-14 14:05:19,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:19,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:19,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:19,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:05:19,880 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:19,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:19,880 INFO L85 PathProgramCache]: Analyzing trace with hash 424967784, now seen corresponding path program 6 times [2024-06-14 14:05:19,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:19,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221820528] [2024-06-14 14:05:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:19,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:20,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:20,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221820528] [2024-06-14 14:05:20,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221820528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:20,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:20,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:20,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700183565] [2024-06-14 14:05:20,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:20,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:20,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:20,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:20,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:20,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:20,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 136 transitions, 1504 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 14:05:20,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:20,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:20,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:20,723 INFO L124 PetriNetUnfolderBase]: 1462/2480 cut-off events. [2024-06-14 14:05:20,723 INFO L125 PetriNetUnfolderBase]: For 59065/59068 co-relation queries the response was YES. [2024-06-14 14:05:20,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13557 conditions, 2480 events. 1462/2480 cut-off events. For 59065/59068 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14304 event pairs, 410 based on Foata normal form. 18/2490 useless extension candidates. Maximal degree in co-relation 13488. Up to 2057 conditions per place. [2024-06-14 14:05:20,739 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 124 selfloop transitions, 34 changer transitions 0/164 dead transitions. [2024-06-14 14:05:20,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 164 transitions, 1918 flow [2024-06-14 14:05:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 14:05:20,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 14:05:20,741 INFO L175 Difference]: Start difference. First operand has 136 places, 136 transitions, 1504 flow. Second operand 7 states and 163 transitions. [2024-06-14 14:05:20,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 164 transitions, 1918 flow [2024-06-14 14:05:20,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 164 transitions, 1862 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-14 14:05:20,827 INFO L231 Difference]: Finished difference. Result has 142 places, 137 transitions, 1549 flow [2024-06-14 14:05:20,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1549, PETRI_PLACES=142, PETRI_TRANSITIONS=137} [2024-06-14 14:05:20,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-14 14:05:20,828 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 137 transitions, 1549 flow [2024-06-14 14:05:20,828 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 14:05:20,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:20,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:20,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:05:20,829 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:20,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:20,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1843301764, now seen corresponding path program 2 times [2024-06-14 14:05:20,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:20,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915972282] [2024-06-14 14:05:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:20,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:21,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:21,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915972282] [2024-06-14 14:05:21,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915972282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:21,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:21,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:21,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644111344] [2024-06-14 14:05:21,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:21,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:21,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:21,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:21,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:21,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 137 transitions, 1549 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 14:05:21,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:21,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:21,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:21,566 INFO L124 PetriNetUnfolderBase]: 1442/2448 cut-off events. [2024-06-14 14:05:21,566 INFO L125 PetriNetUnfolderBase]: For 55830/55833 co-relation queries the response was YES. [2024-06-14 14:05:21,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13228 conditions, 2448 events. 1442/2448 cut-off events. For 55830/55833 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14051 event pairs, 381 based on Foata normal form. 14/2454 useless extension candidates. Maximal degree in co-relation 13157. Up to 1938 conditions per place. [2024-06-14 14:05:21,580 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 125 selfloop transitions, 36 changer transitions 0/167 dead transitions. [2024-06-14 14:05:21,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 167 transitions, 1955 flow [2024-06-14 14:05:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 14:05:21,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 14:05:21,582 INFO L175 Difference]: Start difference. First operand has 142 places, 137 transitions, 1549 flow. Second operand 7 states and 166 transitions. [2024-06-14 14:05:21,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 167 transitions, 1955 flow [2024-06-14 14:05:21,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 167 transitions, 1882 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:21,681 INFO L231 Difference]: Finished difference. Result has 144 places, 137 transitions, 1554 flow [2024-06-14 14:05:21,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1554, PETRI_PLACES=144, PETRI_TRANSITIONS=137} [2024-06-14 14:05:21,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-14 14:05:21,696 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 137 transitions, 1554 flow [2024-06-14 14:05:21,696 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 14:05:21,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:21,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:21,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:05:21,697 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:21,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1742196820, now seen corresponding path program 3 times [2024-06-14 14:05:21,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:21,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667879585] [2024-06-14 14:05:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:21,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:22,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:22,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667879585] [2024-06-14 14:05:22,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667879585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:22,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:22,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:22,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638371661] [2024-06-14 14:05:22,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:22,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:22,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:22,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:22,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:22,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:22,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 137 transitions, 1554 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 14:05:22,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:22,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:22,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:22,489 INFO L124 PetriNetUnfolderBase]: 1422/2416 cut-off events. [2024-06-14 14:05:22,489 INFO L125 PetriNetUnfolderBase]: For 53621/53624 co-relation queries the response was YES. [2024-06-14 14:05:22,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12848 conditions, 2416 events. 1422/2416 cut-off events. For 53621/53624 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13834 event pairs, 326 based on Foata normal form. 14/2422 useless extension candidates. Maximal degree in co-relation 12776. Up to 1405 conditions per place. [2024-06-14 14:05:22,506 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 117 selfloop transitions, 44 changer transitions 0/167 dead transitions. [2024-06-14 14:05:22,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 167 transitions, 1902 flow [2024-06-14 14:05:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 14:05:22,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 14:05:22,507 INFO L175 Difference]: Start difference. First operand has 144 places, 137 transitions, 1554 flow. Second operand 7 states and 165 transitions. [2024-06-14 14:05:22,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 167 transitions, 1902 flow [2024-06-14 14:05:22,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 167 transitions, 1741 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:22,573 INFO L231 Difference]: Finished difference. Result has 142 places, 136 transitions, 1425 flow [2024-06-14 14:05:22,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1425, PETRI_PLACES=142, PETRI_TRANSITIONS=136} [2024-06-14 14:05:22,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-14 14:05:22,574 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 136 transitions, 1425 flow [2024-06-14 14:05:22,574 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 14:05:22,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:22,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:22,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:05:22,574 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:22,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:22,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1464429888, now seen corresponding path program 2 times [2024-06-14 14:05:22,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:22,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958382434] [2024-06-14 14:05:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:22,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:23,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:23,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958382434] [2024-06-14 14:05:23,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958382434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:23,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:23,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:23,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060184121] [2024-06-14 14:05:23,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:23,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:23,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:23,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:23,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:23,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 136 transitions, 1425 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:23,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:23,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:23,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:23,439 INFO L124 PetriNetUnfolderBase]: 1419/2409 cut-off events. [2024-06-14 14:05:23,439 INFO L125 PetriNetUnfolderBase]: For 49275/49275 co-relation queries the response was YES. [2024-06-14 14:05:23,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12565 conditions, 2409 events. 1419/2409 cut-off events. For 49275/49275 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13777 event pairs, 350 based on Foata normal form. 1/2409 useless extension candidates. Maximal degree in co-relation 12494. Up to 2209 conditions per place. [2024-06-14 14:05:23,455 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 128 selfloop transitions, 16 changer transitions 0/150 dead transitions. [2024-06-14 14:05:23,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 150 transitions, 1749 flow [2024-06-14 14:05:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 14:05:23,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-14 14:05:23,456 INFO L175 Difference]: Start difference. First operand has 142 places, 136 transitions, 1425 flow. Second operand 4 states and 101 transitions. [2024-06-14 14:05:23,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 150 transitions, 1749 flow [2024-06-14 14:05:23,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 150 transitions, 1602 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:23,525 INFO L231 Difference]: Finished difference. Result has 140 places, 136 transitions, 1323 flow [2024-06-14 14:05:23,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1323, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2024-06-14 14:05:23,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-14 14:05:23,526 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 1323 flow [2024-06-14 14:05:23,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:23,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:23,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:23,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:05:23,527 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:23,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:23,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2123651450, now seen corresponding path program 1 times [2024-06-14 14:05:23,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:23,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827322908] [2024-06-14 14:05:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:23,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:23,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:23,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827322908] [2024-06-14 14:05:23,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827322908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:23,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:23,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:23,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359842609] [2024-06-14 14:05:23,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:23,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:23,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:23,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:23,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:23,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:23,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 1323 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:23,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:23,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:23,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:24,238 INFO L124 PetriNetUnfolderBase]: 1362/2360 cut-off events. [2024-06-14 14:05:24,239 INFO L125 PetriNetUnfolderBase]: For 51980/51980 co-relation queries the response was YES. [2024-06-14 14:05:24,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11934 conditions, 2360 events. 1362/2360 cut-off events. For 51980/51980 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13771 event pairs, 322 based on Foata normal form. 2/2361 useless extension candidates. Maximal degree in co-relation 11863. Up to 2067 conditions per place. [2024-06-14 14:05:24,254 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 120 selfloop transitions, 26 changer transitions 0/162 dead transitions. [2024-06-14 14:05:24,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 162 transitions, 1779 flow [2024-06-14 14:05:24,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-14 14:05:24,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-14 14:05:24,255 INFO L175 Difference]: Start difference. First operand has 140 places, 136 transitions, 1323 flow. Second operand 9 states and 191 transitions. [2024-06-14 14:05:24,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 162 transitions, 1779 flow [2024-06-14 14:05:24,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 162 transitions, 1747 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:24,321 INFO L231 Difference]: Finished difference. Result has 146 places, 142 transitions, 1407 flow [2024-06-14 14:05:24,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1407, PETRI_PLACES=146, PETRI_TRANSITIONS=142} [2024-06-14 14:05:24,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-14 14:05:24,321 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 142 transitions, 1407 flow [2024-06-14 14:05:24,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:24,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:24,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:24,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:05:24,322 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:24,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:24,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1631556654, now seen corresponding path program 2 times [2024-06-14 14:05:24,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:24,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103662548] [2024-06-14 14:05:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:24,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:24,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:24,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103662548] [2024-06-14 14:05:24,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103662548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:24,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:24,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:24,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098482204] [2024-06-14 14:05:24,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:24,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:24,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:24,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:24,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:24,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:24,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 142 transitions, 1407 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:24,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:24,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:24,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:25,136 INFO L124 PetriNetUnfolderBase]: 1356/2350 cut-off events. [2024-06-14 14:05:25,136 INFO L125 PetriNetUnfolderBase]: For 54355/54355 co-relation queries the response was YES. [2024-06-14 14:05:25,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12165 conditions, 2350 events. 1356/2350 cut-off events. For 54355/54355 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13714 event pairs, 323 based on Foata normal form. 2/2348 useless extension candidates. Maximal degree in co-relation 12093. Up to 2065 conditions per place. [2024-06-14 14:05:25,154 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 120 selfloop transitions, 21 changer transitions 0/157 dead transitions. [2024-06-14 14:05:25,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 1727 flow [2024-06-14 14:05:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-14 14:05:25,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-14 14:05:25,156 INFO L175 Difference]: Start difference. First operand has 146 places, 142 transitions, 1407 flow. Second operand 5 states and 121 transitions. [2024-06-14 14:05:25,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 1727 flow [2024-06-14 14:05:25,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 157 transitions, 1639 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:25,227 INFO L231 Difference]: Finished difference. Result has 144 places, 142 transitions, 1372 flow [2024-06-14 14:05:25,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1372, PETRI_PLACES=144, PETRI_TRANSITIONS=142} [2024-06-14 14:05:25,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-14 14:05:25,228 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 142 transitions, 1372 flow [2024-06-14 14:05:25,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:25,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:25,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:25,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:05:25,228 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:25,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:25,229 INFO L85 PathProgramCache]: Analyzing trace with hash -133432892, now seen corresponding path program 1 times [2024-06-14 14:05:25,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:25,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997131303] [2024-06-14 14:05:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:25,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:25,620 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 14:05:25,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:25,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997131303] [2024-06-14 14:05:25,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997131303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:25,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:25,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:25,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461577182] [2024-06-14 14:05:25,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:25,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:25,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:25,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:25,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:25,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 142 transitions, 1372 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:25,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:25,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:25,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:26,037 INFO L124 PetriNetUnfolderBase]: 1418/2412 cut-off events. [2024-06-14 14:05:26,037 INFO L125 PetriNetUnfolderBase]: For 55717/55717 co-relation queries the response was YES. [2024-06-14 14:05:26,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12412 conditions, 2412 events. 1418/2412 cut-off events. For 55717/55717 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13820 event pairs, 347 based on Foata normal form. 2/2413 useless extension candidates. Maximal degree in co-relation 12341. Up to 2225 conditions per place. [2024-06-14 14:05:26,061 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 137 selfloop transitions, 10 changer transitions 0/153 dead transitions. [2024-06-14 14:05:26,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 153 transitions, 1712 flow [2024-06-14 14:05:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-14 14:05:26,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 14:05:26,062 INFO L175 Difference]: Start difference. First operand has 144 places, 142 transitions, 1372 flow. Second operand 4 states and 93 transitions. [2024-06-14 14:05:26,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 153 transitions, 1712 flow [2024-06-14 14:05:26,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 153 transitions, 1670 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:26,126 INFO L231 Difference]: Finished difference. Result has 144 places, 144 transitions, 1383 flow [2024-06-14 14:05:26,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1383, PETRI_PLACES=144, PETRI_TRANSITIONS=144} [2024-06-14 14:05:26,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-14 14:05:26,127 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 144 transitions, 1383 flow [2024-06-14 14:05:26,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:26,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:26,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:26,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:05:26,128 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:26,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:26,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2122527214, now seen corresponding path program 1 times [2024-06-14 14:05:26,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:26,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973625012] [2024-06-14 14:05:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:26,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:26,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:26,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973625012] [2024-06-14 14:05:26,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973625012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:26,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:26,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:26,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387852586] [2024-06-14 14:05:26,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:26,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:26,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:26,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:26,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:26,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:26,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 144 transitions, 1383 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:26,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:26,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:26,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:26,968 INFO L124 PetriNetUnfolderBase]: 1436/2444 cut-off events. [2024-06-14 14:05:26,968 INFO L125 PetriNetUnfolderBase]: For 59157/59160 co-relation queries the response was YES. [2024-06-14 14:05:27,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12705 conditions, 2444 events. 1436/2444 cut-off events. For 59157/59160 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14046 event pairs, 350 based on Foata normal form. 4/2446 useless extension candidates. Maximal degree in co-relation 12633. Up to 2090 conditions per place. [2024-06-14 14:05:27,030 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 47 changer transitions 0/180 dead transitions. [2024-06-14 14:05:27,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 180 transitions, 2057 flow [2024-06-14 14:05:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:27,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:27,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 14:05:27,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 14:05:27,031 INFO L175 Difference]: Start difference. First operand has 144 places, 144 transitions, 1383 flow. Second operand 6 states and 150 transitions. [2024-06-14 14:05:27,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 180 transitions, 2057 flow [2024-06-14 14:05:27,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 180 transitions, 2020 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:27,108 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1613 flow [2024-06-14 14:05:27,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1613, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2024-06-14 14:05:27,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-14 14:05:27,108 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1613 flow [2024-06-14 14:05:27,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:27,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:27,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:27,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:05:27,109 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:27,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:27,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2137832308, now seen corresponding path program 2 times [2024-06-14 14:05:27,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:27,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860990469] [2024-06-14 14:05:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:27,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:27,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:27,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860990469] [2024-06-14 14:05:27,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860990469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:27,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:27,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:27,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300936841] [2024-06-14 14:05:27,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:27,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:27,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:27,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:27,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:27,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:27,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1613 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:27,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:27,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:27,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:27,919 INFO L124 PetriNetUnfolderBase]: 1464/2488 cut-off events. [2024-06-14 14:05:27,920 INFO L125 PetriNetUnfolderBase]: For 64912/64915 co-relation queries the response was YES. [2024-06-14 14:05:27,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13616 conditions, 2488 events. 1464/2488 cut-off events. For 64912/64915 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14334 event pairs, 352 based on Foata normal form. 4/2490 useless extension candidates. Maximal degree in co-relation 13542. Up to 2118 conditions per place. [2024-06-14 14:05:27,937 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 130 selfloop transitions, 46 changer transitions 0/182 dead transitions. [2024-06-14 14:05:27,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 182 transitions, 2260 flow [2024-06-14 14:05:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 14:05:27,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 14:05:27,939 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1613 flow. Second operand 6 states and 143 transitions. [2024-06-14 14:05:27,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 182 transitions, 2260 flow [2024-06-14 14:05:28,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 182 transitions, 2198 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-14 14:05:28,017 INFO L231 Difference]: Finished difference. Result has 155 places, 164 transitions, 1776 flow [2024-06-14 14:05:28,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1776, PETRI_PLACES=155, PETRI_TRANSITIONS=164} [2024-06-14 14:05:28,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-14 14:05:28,017 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 164 transitions, 1776 flow [2024-06-14 14:05:28,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:28,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:28,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:28,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:05:28,018 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:28,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash 422631160, now seen corresponding path program 3 times [2024-06-14 14:05:28,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:28,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694573967] [2024-06-14 14:05:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:28,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:28,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:28,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694573967] [2024-06-14 14:05:28,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694573967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:28,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:28,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:28,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796818110] [2024-06-14 14:05:28,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:28,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:28,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:28,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:28,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:28,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:28,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 164 transitions, 1776 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:28,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:28,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:28,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:28,764 INFO L124 PetriNetUnfolderBase]: 1460/2484 cut-off events. [2024-06-14 14:05:28,764 INFO L125 PetriNetUnfolderBase]: For 66992/66995 co-relation queries the response was YES. [2024-06-14 14:05:28,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13706 conditions, 2484 events. 1460/2484 cut-off events. For 66992/66995 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14337 event pairs, 352 based on Foata normal form. 4/2486 useless extension candidates. Maximal degree in co-relation 13629. Up to 2148 conditions per place. [2024-06-14 14:05:28,783 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 136 selfloop transitions, 44 changer transitions 0/186 dead transitions. [2024-06-14 14:05:28,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 186 transitions, 2266 flow [2024-06-14 14:05:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 14:05:28,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-14 14:05:28,784 INFO L175 Difference]: Start difference. First operand has 155 places, 164 transitions, 1776 flow. Second operand 5 states and 131 transitions. [2024-06-14 14:05:28,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 186 transitions, 2266 flow [2024-06-14 14:05:28,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 186 transitions, 2167 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:28,901 INFO L231 Difference]: Finished difference. Result has 158 places, 164 transitions, 1786 flow [2024-06-14 14:05:28,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1786, PETRI_PLACES=158, PETRI_TRANSITIONS=164} [2024-06-14 14:05:28,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 14:05:28,902 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 164 transitions, 1786 flow [2024-06-14 14:05:28,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:28,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:28,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:28,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:05:28,902 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:28,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:28,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1483583373, now seen corresponding path program 1 times [2024-06-14 14:05:28,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:28,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138558077] [2024-06-14 14:05:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:28,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:29,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:29,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138558077] [2024-06-14 14:05:29,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138558077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:29,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:29,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:29,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674234296] [2024-06-14 14:05:29,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:29,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:29,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:29,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:29,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 164 transitions, 1786 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:29,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:29,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:29,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:29,684 INFO L124 PetriNetUnfolderBase]: 1486/2523 cut-off events. [2024-06-14 14:05:29,684 INFO L125 PetriNetUnfolderBase]: For 72394/72394 co-relation queries the response was YES. [2024-06-14 14:05:29,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14053 conditions, 2523 events. 1486/2523 cut-off events. For 72394/72394 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14566 event pairs, 350 based on Foata normal form. 2/2521 useless extension candidates. Maximal degree in co-relation 13975. Up to 2085 conditions per place. [2024-06-14 14:05:29,701 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 139 selfloop transitions, 65 changer transitions 0/210 dead transitions. [2024-06-14 14:05:29,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 210 transitions, 2576 flow [2024-06-14 14:05:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 14:05:29,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-14 14:05:29,702 INFO L175 Difference]: Start difference. First operand has 158 places, 164 transitions, 1786 flow. Second operand 11 states and 239 transitions. [2024-06-14 14:05:29,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 210 transitions, 2576 flow [2024-06-14 14:05:29,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 210 transitions, 2467 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:29,790 INFO L231 Difference]: Finished difference. Result has 166 places, 180 transitions, 1989 flow [2024-06-14 14:05:29,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1989, PETRI_PLACES=166, PETRI_TRANSITIONS=180} [2024-06-14 14:05:29,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-14 14:05:29,791 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 180 transitions, 1989 flow [2024-06-14 14:05:29,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:29,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:29,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:29,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:05:29,791 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:29,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2025656063, now seen corresponding path program 1 times [2024-06-14 14:05:29,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:29,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117105021] [2024-06-14 14:05:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:29,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:30,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:30,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117105021] [2024-06-14 14:05:30,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117105021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:30,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:30,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:30,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740182070] [2024-06-14 14:05:30,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:30,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:30,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:30,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:30,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:30,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 180 transitions, 1989 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:30,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:30,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:30,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:30,556 INFO L124 PetriNetUnfolderBase]: 1512/2562 cut-off events. [2024-06-14 14:05:30,556 INFO L125 PetriNetUnfolderBase]: For 78938/78941 co-relation queries the response was YES. [2024-06-14 14:05:30,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14947 conditions, 2562 events. 1512/2562 cut-off events. For 78938/78941 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14779 event pairs, 348 based on Foata normal form. 4/2564 useless extension candidates. Maximal degree in co-relation 14867. Up to 2174 conditions per place. [2024-06-14 14:05:30,577 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 144 selfloop transitions, 61 changer transitions 0/211 dead transitions. [2024-06-14 14:05:30,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 2750 flow [2024-06-14 14:05:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:30,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 14:05:30,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 14:05:30,578 INFO L175 Difference]: Start difference. First operand has 166 places, 180 transitions, 1989 flow. Second operand 6 states and 147 transitions. [2024-06-14 14:05:30,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 2750 flow [2024-06-14 14:05:30,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 211 transitions, 2590 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:30,705 INFO L231 Difference]: Finished difference. Result has 166 places, 190 transitions, 2129 flow [2024-06-14 14:05:30,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2129, PETRI_PLACES=166, PETRI_TRANSITIONS=190} [2024-06-14 14:05:30,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-14 14:05:30,706 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 190 transitions, 2129 flow [2024-06-14 14:05:30,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:30,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:30,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:30,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:05:30,706 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:30,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:30,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2025656249, now seen corresponding path program 2 times [2024-06-14 14:05:30,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:30,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448304767] [2024-06-14 14:05:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:30,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:31,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:31,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448304767] [2024-06-14 14:05:31,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448304767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:31,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:31,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:31,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471549980] [2024-06-14 14:05:31,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:31,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:31,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:31,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:31,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:31,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 190 transitions, 2129 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:31,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:31,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:31,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:31,500 INFO L124 PetriNetUnfolderBase]: 1506/2554 cut-off events. [2024-06-14 14:05:31,501 INFO L125 PetriNetUnfolderBase]: For 80597/80600 co-relation queries the response was YES. [2024-06-14 14:05:31,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14933 conditions, 2554 events. 1506/2554 cut-off events. For 80597/80600 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14728 event pairs, 346 based on Foata normal form. 4/2556 useless extension candidates. Maximal degree in co-relation 14852. Up to 2216 conditions per place. [2024-06-14 14:05:31,521 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-06-14 14:05:31,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 212 transitions, 2597 flow [2024-06-14 14:05:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:05:31,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 14:05:31,525 INFO L175 Difference]: Start difference. First operand has 166 places, 190 transitions, 2129 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:05:31,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 212 transitions, 2597 flow [2024-06-14 14:05:31,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 212 transitions, 2497 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:31,633 INFO L231 Difference]: Finished difference. Result has 170 places, 190 transitions, 2115 flow [2024-06-14 14:05:31,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2115, PETRI_PLACES=170, PETRI_TRANSITIONS=190} [2024-06-14 14:05:31,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-14 14:05:31,633 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 190 transitions, 2115 flow [2024-06-14 14:05:31,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:31,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:31,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:31,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:05:31,634 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:31,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:31,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1661072199, now seen corresponding path program 2 times [2024-06-14 14:05:31,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:31,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337106434] [2024-06-14 14:05:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:31,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:31,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:31,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337106434] [2024-06-14 14:05:31,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337106434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:31,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:31,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:31,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500275422] [2024-06-14 14:05:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:31,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:31,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:31,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:32,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:32,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 190 transitions, 2115 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:32,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:32,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:32,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:32,388 INFO L124 PetriNetUnfolderBase]: 1500/2546 cut-off events. [2024-06-14 14:05:32,388 INFO L125 PetriNetUnfolderBase]: For 82844/82847 co-relation queries the response was YES. [2024-06-14 14:05:32,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14845 conditions, 2546 events. 1500/2546 cut-off events. For 82844/82847 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14700 event pairs, 348 based on Foata normal form. 4/2548 useless extension candidates. Maximal degree in co-relation 14763. Up to 2161 conditions per place. [2024-06-14 14:05:32,406 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 148 selfloop transitions, 54 changer transitions 0/208 dead transitions. [2024-06-14 14:05:32,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 208 transitions, 2727 flow [2024-06-14 14:05:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 14:05:32,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 14:05:32,407 INFO L175 Difference]: Start difference. First operand has 170 places, 190 transitions, 2115 flow. Second operand 6 states and 143 transitions. [2024-06-14 14:05:32,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 208 transitions, 2727 flow [2024-06-14 14:05:32,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 208 transitions, 2653 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:32,543 INFO L231 Difference]: Finished difference. Result has 171 places, 190 transitions, 2158 flow [2024-06-14 14:05:32,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2158, PETRI_PLACES=171, PETRI_TRANSITIONS=190} [2024-06-14 14:05:32,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-14 14:05:32,543 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 190 transitions, 2158 flow [2024-06-14 14:05:32,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:32,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:32,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:32,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 14:05:32,544 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:32,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:32,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1848278465, now seen corresponding path program 1 times [2024-06-14 14:05:32,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:32,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343206422] [2024-06-14 14:05:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:32,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:32,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:32,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343206422] [2024-06-14 14:05:32,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343206422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:32,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:32,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404154669] [2024-06-14 14:05:32,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:32,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:32,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:32,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:33,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:33,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 190 transitions, 2158 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:33,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:33,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:33,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:33,465 INFO L124 PetriNetUnfolderBase]: 1508/2557 cut-off events. [2024-06-14 14:05:33,466 INFO L125 PetriNetUnfolderBase]: For 86723/86723 co-relation queries the response was YES. [2024-06-14 14:05:33,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15081 conditions, 2557 events. 1508/2557 cut-off events. For 86723/86723 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14729 event pairs, 342 based on Foata normal form. 2/2558 useless extension candidates. Maximal degree in co-relation 14998. Up to 2326 conditions per place. [2024-06-14 14:05:33,495 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 182 selfloop transitions, 21 changer transitions 0/209 dead transitions. [2024-06-14 14:05:33,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 209 transitions, 2646 flow [2024-06-14 14:05:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 14:05:33,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:05:33,502 INFO L175 Difference]: Start difference. First operand has 171 places, 190 transitions, 2158 flow. Second operand 6 states and 135 transitions. [2024-06-14 14:05:33,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 209 transitions, 2646 flow [2024-06-14 14:05:33,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 209 transitions, 2545 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:33,755 INFO L231 Difference]: Finished difference. Result has 174 places, 192 transitions, 2148 flow [2024-06-14 14:05:33,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2148, PETRI_PLACES=174, PETRI_TRANSITIONS=192} [2024-06-14 14:05:33,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-14 14:05:33,756 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 192 transitions, 2148 flow [2024-06-14 14:05:33,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:33,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:33,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:33,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 14:05:33,756 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:33,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash 708170969, now seen corresponding path program 3 times [2024-06-14 14:05:33,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:33,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396644472] [2024-06-14 14:05:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:33,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:34,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:34,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396644472] [2024-06-14 14:05:34,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396644472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:34,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:34,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:34,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787319199] [2024-06-14 14:05:34,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:34,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:34,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:34,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:34,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:34,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:34,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 192 transitions, 2148 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:34,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:34,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:34,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:34,494 INFO L124 PetriNetUnfolderBase]: 1521/2565 cut-off events. [2024-06-14 14:05:34,494 INFO L125 PetriNetUnfolderBase]: For 91579/91579 co-relation queries the response was YES. [2024-06-14 14:05:34,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15272 conditions, 2565 events. 1521/2565 cut-off events. For 91579/91579 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 14740 event pairs, 370 based on Foata normal form. 1/2559 useless extension candidates. Maximal degree in co-relation 15188. Up to 2130 conditions per place. [2024-06-14 14:05:34,517 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 80 changer transitions 0/228 dead transitions. [2024-06-14 14:05:34,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 228 transitions, 3040 flow [2024-06-14 14:05:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-14 14:05:34,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277161862527716 [2024-06-14 14:05:34,518 INFO L175 Difference]: Start difference. First operand has 174 places, 192 transitions, 2148 flow. Second operand 11 states and 238 transitions. [2024-06-14 14:05:34,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 228 transitions, 3040 flow [2024-06-14 14:05:34,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 228 transitions, 2965 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:34,683 INFO L231 Difference]: Finished difference. Result has 181 places, 201 transitions, 2367 flow [2024-06-14 14:05:34,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2367, PETRI_PLACES=181, PETRI_TRANSITIONS=201} [2024-06-14 14:05:34,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-14 14:05:34,684 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 201 transitions, 2367 flow [2024-06-14 14:05:34,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:34,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:34,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:34,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 14:05:34,684 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:34,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash 480269819, now seen corresponding path program 4 times [2024-06-14 14:05:34,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:34,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189062902] [2024-06-14 14:05:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:35,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:35,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189062902] [2024-06-14 14:05:35,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189062902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:35,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:35,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:35,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599727862] [2024-06-14 14:05:35,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:35,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:35,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:35,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:35,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:35,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:35,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 201 transitions, 2367 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:35,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:35,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:35,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:35,625 INFO L124 PetriNetUnfolderBase]: 1526/2574 cut-off events. [2024-06-14 14:05:35,625 INFO L125 PetriNetUnfolderBase]: For 95991/95991 co-relation queries the response was YES. [2024-06-14 14:05:35,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15619 conditions, 2574 events. 1526/2574 cut-off events. For 95991/95991 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 14786 event pairs, 370 based on Foata normal form. 1/2568 useless extension candidates. Maximal degree in co-relation 15534. Up to 2134 conditions per place. [2024-06-14 14:05:35,652 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 144 selfloop transitions, 81 changer transitions 0/231 dead transitions. [2024-06-14 14:05:35,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 231 transitions, 3193 flow [2024-06-14 14:05:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-14 14:05:35,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277161862527716 [2024-06-14 14:05:35,657 INFO L175 Difference]: Start difference. First operand has 181 places, 201 transitions, 2367 flow. Second operand 11 states and 238 transitions. [2024-06-14 14:05:35,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 231 transitions, 3193 flow [2024-06-14 14:05:35,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 231 transitions, 3056 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:35,842 INFO L231 Difference]: Finished difference. Result has 187 places, 204 transitions, 2446 flow [2024-06-14 14:05:35,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2446, PETRI_PLACES=187, PETRI_TRANSITIONS=204} [2024-06-14 14:05:35,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-14 14:05:35,843 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 204 transitions, 2446 flow [2024-06-14 14:05:35,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:35,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:35,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:35,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 14:05:35,844 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:35,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash 480389975, now seen corresponding path program 3 times [2024-06-14 14:05:35,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:35,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535845649] [2024-06-14 14:05:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:35,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:36,246 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 14:05:36,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:36,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535845649] [2024-06-14 14:05:36,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535845649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:36,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:36,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:36,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201018361] [2024-06-14 14:05:36,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:36,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:36,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:36,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:36,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:36,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:36,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 204 transitions, 2446 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:36,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:36,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:36,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:36,780 INFO L124 PetriNetUnfolderBase]: 1521/2570 cut-off events. [2024-06-14 14:05:36,780 INFO L125 PetriNetUnfolderBase]: For 97824/97824 co-relation queries the response was YES. [2024-06-14 14:05:36,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15666 conditions, 2570 events. 1521/2570 cut-off events. For 97824/97824 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 14776 event pairs, 371 based on Foata normal form. 1/2566 useless extension candidates. Maximal degree in co-relation 15580. Up to 2193 conditions per place. [2024-06-14 14:05:36,804 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 151 selfloop transitions, 65 changer transitions 0/222 dead transitions. [2024-06-14 14:05:36,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 222 transitions, 3102 flow [2024-06-14 14:05:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 14:05:36,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 14:05:36,806 INFO L175 Difference]: Start difference. First operand has 187 places, 204 transitions, 2446 flow. Second operand 6 states and 144 transitions. [2024-06-14 14:05:36,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 222 transitions, 3102 flow [2024-06-14 14:05:36,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 222 transitions, 2938 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:36,985 INFO L231 Difference]: Finished difference. Result has 186 places, 204 transitions, 2418 flow [2024-06-14 14:05:36,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2418, PETRI_PLACES=186, PETRI_TRANSITIONS=204} [2024-06-14 14:05:36,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-14 14:05:36,986 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 204 transitions, 2418 flow [2024-06-14 14:05:36,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:36,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:36,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:36,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 14:05:36,986 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:36,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:36,986 INFO L85 PathProgramCache]: Analyzing trace with hash 147611243, now seen corresponding path program 5 times [2024-06-14 14:05:36,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:36,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454000182] [2024-06-14 14:05:36,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:36,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:37,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:37,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454000182] [2024-06-14 14:05:37,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454000182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:37,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:37,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:37,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745876987] [2024-06-14 14:05:37,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:37,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:37,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:37,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:37,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:37,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:37,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 204 transitions, 2418 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:37,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:37,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:37,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:37,765 INFO L124 PetriNetUnfolderBase]: 1526/2573 cut-off events. [2024-06-14 14:05:37,765 INFO L125 PetriNetUnfolderBase]: For 101521/101521 co-relation queries the response was YES. [2024-06-14 14:05:37,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15712 conditions, 2573 events. 1526/2573 cut-off events. For 101521/101521 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14804 event pairs, 370 based on Foata normal form. 1/2567 useless extension candidates. Maximal degree in co-relation 15626. Up to 2131 conditions per place. [2024-06-14 14:05:37,788 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 139 selfloop transitions, 85 changer transitions 0/230 dead transitions. [2024-06-14 14:05:37,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 230 transitions, 3149 flow [2024-06-14 14:05:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 14:05:37,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 14:05:37,790 INFO L175 Difference]: Start difference. First operand has 186 places, 204 transitions, 2418 flow. Second operand 10 states and 219 transitions. [2024-06-14 14:05:37,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 230 transitions, 3149 flow [2024-06-14 14:05:38,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 230 transitions, 2871 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:38,014 INFO L231 Difference]: Finished difference. Result has 188 places, 208 transitions, 2363 flow [2024-06-14 14:05:38,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2140, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2363, PETRI_PLACES=188, PETRI_TRANSITIONS=208} [2024-06-14 14:05:38,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-14 14:05:38,014 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 208 transitions, 2363 flow [2024-06-14 14:05:38,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:38,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:38,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 14:05:38,015 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:38,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash 480389789, now seen corresponding path program 6 times [2024-06-14 14:05:38,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:38,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244576475] [2024-06-14 14:05:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:38,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:38,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:38,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244576475] [2024-06-14 14:05:38,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244576475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:38,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:38,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:38,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220355529] [2024-06-14 14:05:38,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:38,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:38,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:38,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:38,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:38,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 208 transitions, 2363 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:38,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:38,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:38,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:38,804 INFO L124 PetriNetUnfolderBase]: 1523/2575 cut-off events. [2024-06-14 14:05:38,804 INFO L125 PetriNetUnfolderBase]: For 103248/103248 co-relation queries the response was YES. [2024-06-14 14:05:38,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15644 conditions, 2575 events. 1523/2575 cut-off events. For 103248/103248 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14821 event pairs, 362 based on Foata normal form. 1/2571 useless extension candidates. Maximal degree in co-relation 15558. Up to 2253 conditions per place. [2024-06-14 14:05:38,822 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 184 selfloop transitions, 37 changer transitions 0/227 dead transitions. [2024-06-14 14:05:38,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 227 transitions, 2853 flow [2024-06-14 14:05:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:38,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 14:05:38,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 14:05:38,823 INFO L175 Difference]: Start difference. First operand has 188 places, 208 transitions, 2363 flow. Second operand 6 states and 143 transitions. [2024-06-14 14:05:38,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 227 transitions, 2853 flow [2024-06-14 14:05:39,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 227 transitions, 2679 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:39,019 INFO L231 Difference]: Finished difference. Result has 188 places, 208 transitions, 2273 flow [2024-06-14 14:05:39,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2273, PETRI_PLACES=188, PETRI_TRANSITIONS=208} [2024-06-14 14:05:39,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-14 14:05:39,019 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 208 transitions, 2273 flow [2024-06-14 14:05:39,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:39,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:39,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:39,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 14:05:39,020 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:39,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1102949489, now seen corresponding path program 4 times [2024-06-14 14:05:39,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:39,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391967238] [2024-06-14 14:05:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:39,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:39,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:39,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391967238] [2024-06-14 14:05:39,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391967238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:39,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:39,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:39,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788549614] [2024-06-14 14:05:39,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:39,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:39,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:39,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:39,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:39,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:39,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 208 transitions, 2273 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:39,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:39,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:39,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:39,960 INFO L124 PetriNetUnfolderBase]: 1533/2593 cut-off events. [2024-06-14 14:05:39,961 INFO L125 PetriNetUnfolderBase]: For 106319/106319 co-relation queries the response was YES. [2024-06-14 14:05:39,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15671 conditions, 2593 events. 1533/2593 cut-off events. For 106319/106319 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14990 event pairs, 342 based on Foata normal form. 1/2593 useless extension candidates. Maximal degree in co-relation 15584. Up to 2370 conditions per place. [2024-06-14 14:05:39,985 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 199 selfloop transitions, 22 changer transitions 0/227 dead transitions. [2024-06-14 14:05:39,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 227 transitions, 2819 flow [2024-06-14 14:05:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 14:05:39,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 14:05:39,986 INFO L175 Difference]: Start difference. First operand has 188 places, 208 transitions, 2273 flow. Second operand 6 states and 132 transitions. [2024-06-14 14:05:39,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 227 transitions, 2819 flow [2024-06-14 14:05:40,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 227 transitions, 2739 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:40,240 INFO L231 Difference]: Finished difference. Result has 188 places, 214 transitions, 2321 flow [2024-06-14 14:05:40,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2321, PETRI_PLACES=188, PETRI_TRANSITIONS=214} [2024-06-14 14:05:40,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-14 14:05:40,241 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 214 transitions, 2321 flow [2024-06-14 14:05:40,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:40,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:40,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:40,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 14:05:40,241 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:40,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:40,242 INFO L85 PathProgramCache]: Analyzing trace with hash 834889979, now seen corresponding path program 7 times [2024-06-14 14:05:40,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:40,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487500997] [2024-06-14 14:05:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:40,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:40,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:40,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487500997] [2024-06-14 14:05:40,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487500997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:40,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:40,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:40,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109510472] [2024-06-14 14:05:40,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:40,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:40,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:40,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:40,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:40,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 214 transitions, 2321 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:40,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:40,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:40,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:41,028 INFO L124 PetriNetUnfolderBase]: 1530/2585 cut-off events. [2024-06-14 14:05:41,028 INFO L125 PetriNetUnfolderBase]: For 105527/105527 co-relation queries the response was YES. [2024-06-14 14:05:41,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15521 conditions, 2585 events. 1530/2585 cut-off events. For 105527/105527 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14903 event pairs, 362 based on Foata normal form. 1/2581 useless extension candidates. Maximal degree in co-relation 15434. Up to 2215 conditions per place. [2024-06-14 14:05:41,052 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 172 selfloop transitions, 55 changer transitions 0/233 dead transitions. [2024-06-14 14:05:41,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 233 transitions, 2823 flow [2024-06-14 14:05:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:41,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 14:05:41,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-14 14:05:41,054 INFO L175 Difference]: Start difference. First operand has 188 places, 214 transitions, 2321 flow. Second operand 6 states and 145 transitions. [2024-06-14 14:05:41,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 233 transitions, 2823 flow [2024-06-14 14:05:41,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 233 transitions, 2746 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:41,297 INFO L231 Difference]: Finished difference. Result has 192 places, 214 transitions, 2364 flow [2024-06-14 14:05:41,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2244, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2364, PETRI_PLACES=192, PETRI_TRANSITIONS=214} [2024-06-14 14:05:41,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-14 14:05:41,298 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 214 transitions, 2364 flow [2024-06-14 14:05:41,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:41,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:41,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:41,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 14:05:41,298 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:41,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:41,298 INFO L85 PathProgramCache]: Analyzing trace with hash 377086169, now seen corresponding path program 5 times [2024-06-14 14:05:41,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:41,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412620548] [2024-06-14 14:05:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:41,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:41,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:41,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412620548] [2024-06-14 14:05:41,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412620548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:41,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:41,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:41,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648515078] [2024-06-14 14:05:41,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:41,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:41,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:41,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:41,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:41,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:41,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 214 transitions, 2364 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:41,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:41,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:41,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:42,034 INFO L124 PetriNetUnfolderBase]: 1524/2582 cut-off events. [2024-06-14 14:05:42,035 INFO L125 PetriNetUnfolderBase]: For 108301/108304 co-relation queries the response was YES. [2024-06-14 14:05:42,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15583 conditions, 2582 events. 1524/2582 cut-off events. For 108301/108304 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14936 event pairs, 349 based on Foata normal form. 4/2584 useless extension candidates. Maximal degree in co-relation 15495. Up to 2231 conditions per place. [2024-06-14 14:05:42,056 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-06-14 14:05:42,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 233 transitions, 2964 flow [2024-06-14 14:05:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 14:05:42,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-14 14:05:42,058 INFO L175 Difference]: Start difference. First operand has 192 places, 214 transitions, 2364 flow. Second operand 5 states and 128 transitions. [2024-06-14 14:05:42,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 233 transitions, 2964 flow [2024-06-14 14:05:42,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 233 transitions, 2860 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:42,285 INFO L231 Difference]: Finished difference. Result has 193 places, 214 transitions, 2379 flow [2024-06-14 14:05:42,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2379, PETRI_PLACES=193, PETRI_TRANSITIONS=214} [2024-06-14 14:05:42,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-14 14:05:42,285 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 214 transitions, 2379 flow [2024-06-14 14:05:42,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:42,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:42,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:42,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 14:05:42,286 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:42,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:42,286 INFO L85 PathProgramCache]: Analyzing trace with hash 389805779, now seen corresponding path program 6 times [2024-06-14 14:05:42,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:42,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146592166] [2024-06-14 14:05:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:42,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:42,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:42,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146592166] [2024-06-14 14:05:42,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146592166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:42,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:42,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:42,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132329140] [2024-06-14 14:05:42,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:42,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:42,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:42,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:42,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:42,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:42,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 214 transitions, 2379 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:42,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:42,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:42,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:43,060 INFO L124 PetriNetUnfolderBase]: 1519/2573 cut-off events. [2024-06-14 14:05:43,060 INFO L125 PetriNetUnfolderBase]: For 105758/105758 co-relation queries the response was YES. [2024-06-14 14:05:43,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15485 conditions, 2573 events. 1519/2573 cut-off events. For 105758/105758 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14839 event pairs, 342 based on Foata normal form. 1/2573 useless extension candidates. Maximal degree in co-relation 15397. Up to 2226 conditions per place. [2024-06-14 14:05:43,083 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 56 changer transitions 0/240 dead transitions. [2024-06-14 14:05:43,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 240 transitions, 2913 flow [2024-06-14 14:05:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:05:43,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 14:05:43,084 INFO L175 Difference]: Start difference. First operand has 193 places, 214 transitions, 2379 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:05:43,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 240 transitions, 2913 flow [2024-06-14 14:05:43,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 240 transitions, 2738 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:43,287 INFO L231 Difference]: Finished difference. Result has 194 places, 214 transitions, 2333 flow [2024-06-14 14:05:43,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2333, PETRI_PLACES=194, PETRI_TRANSITIONS=214} [2024-06-14 14:05:43,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-14 14:05:43,288 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 214 transitions, 2333 flow [2024-06-14 14:05:43,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:43,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:43,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:43,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 14:05:43,289 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:43,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:43,289 INFO L85 PathProgramCache]: Analyzing trace with hash 216677715, now seen corresponding path program 2 times [2024-06-14 14:05:43,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:43,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090333754] [2024-06-14 14:05:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:43,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:43,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:43,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090333754] [2024-06-14 14:05:43,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090333754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:43,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:43,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:43,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534850661] [2024-06-14 14:05:43,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:43,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:43,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:43,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:43,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:43,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:43,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 214 transitions, 2333 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:43,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:43,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:43,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:44,054 INFO L124 PetriNetUnfolderBase]: 1527/2585 cut-off events. [2024-06-14 14:05:44,054 INFO L125 PetriNetUnfolderBase]: For 107039/107039 co-relation queries the response was YES. [2024-06-14 14:05:44,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15547 conditions, 2585 events. 1527/2585 cut-off events. For 107039/107039 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14933 event pairs, 344 based on Foata normal form. 2/2586 useless extension candidates. Maximal degree in co-relation 15459. Up to 2357 conditions per place. [2024-06-14 14:05:44,077 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 208 selfloop transitions, 18 changer transitions 0/232 dead transitions. [2024-06-14 14:05:44,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 232 transitions, 2869 flow [2024-06-14 14:05:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 14:05:44,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-14 14:05:44,078 INFO L175 Difference]: Start difference. First operand has 194 places, 214 transitions, 2333 flow. Second operand 5 states and 118 transitions. [2024-06-14 14:05:44,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 232 transitions, 2869 flow [2024-06-14 14:05:44,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 232 transitions, 2746 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:44,382 INFO L231 Difference]: Finished difference. Result has 192 places, 216 transitions, 2299 flow [2024-06-14 14:05:44,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2299, PETRI_PLACES=192, PETRI_TRANSITIONS=216} [2024-06-14 14:05:44,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-14 14:05:44,383 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 216 transitions, 2299 flow [2024-06-14 14:05:44,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:44,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:44,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:44,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 14:05:44,383 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:44,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash 620030627, now seen corresponding path program 3 times [2024-06-14 14:05:44,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:44,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829651283] [2024-06-14 14:05:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:44,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:44,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:44,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829651283] [2024-06-14 14:05:44,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829651283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:44,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:44,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:44,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74761642] [2024-06-14 14:05:44,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:44,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:44,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:44,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:44,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:44,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 216 transitions, 2299 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:44,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:44,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:44,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:45,197 INFO L124 PetriNetUnfolderBase]: 1522/2578 cut-off events. [2024-06-14 14:05:45,198 INFO L125 PetriNetUnfolderBase]: For 100999/100999 co-relation queries the response was YES. [2024-06-14 14:05:45,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15256 conditions, 2578 events. 1522/2578 cut-off events. For 100999/100999 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14912 event pairs, 341 based on Foata normal form. 2/2579 useless extension candidates. Maximal degree in co-relation 15168. Up to 2336 conditions per place. [2024-06-14 14:05:45,219 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 208 selfloop transitions, 22 changer transitions 0/236 dead transitions. [2024-06-14 14:05:45,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 236 transitions, 2851 flow [2024-06-14 14:05:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 14:05:45,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 14:05:45,220 INFO L175 Difference]: Start difference. First operand has 192 places, 216 transitions, 2299 flow. Second operand 6 states and 136 transitions. [2024-06-14 14:05:45,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 236 transitions, 2851 flow [2024-06-14 14:05:45,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 236 transitions, 2778 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:45,405 INFO L231 Difference]: Finished difference. Result has 195 places, 218 transitions, 2327 flow [2024-06-14 14:05:45,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2327, PETRI_PLACES=195, PETRI_TRANSITIONS=218} [2024-06-14 14:05:45,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-14 14:05:45,406 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 218 transitions, 2327 flow [2024-06-14 14:05:45,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:45,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:45,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:45,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 14:05:45,407 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:45,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:45,407 INFO L85 PathProgramCache]: Analyzing trace with hash 716750777, now seen corresponding path program 1 times [2024-06-14 14:05:45,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:45,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616586997] [2024-06-14 14:05:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:45,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:45,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:45,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616586997] [2024-06-14 14:05:45,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616586997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:45,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:45,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:45,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686039333] [2024-06-14 14:05:45,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:45,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:45,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:45,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:45,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:45,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:45,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 218 transitions, 2327 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:45,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:45,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:45,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:46,248 INFO L124 PetriNetUnfolderBase]: 1519/2609 cut-off events. [2024-06-14 14:05:46,248 INFO L125 PetriNetUnfolderBase]: For 120510/120510 co-relation queries the response was YES. [2024-06-14 14:05:46,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15748 conditions, 2609 events. 1519/2609 cut-off events. For 120510/120510 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15403 event pairs, 314 based on Foata normal form. 8/2613 useless extension candidates. Maximal degree in co-relation 15659. Up to 2176 conditions per place. [2024-06-14 14:05:46,269 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 188 selfloop transitions, 37 changer transitions 0/251 dead transitions. [2024-06-14 14:05:46,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 251 transitions, 3003 flow [2024-06-14 14:05:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-14 14:05:46,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-14 14:05:46,270 INFO L175 Difference]: Start difference. First operand has 195 places, 218 transitions, 2327 flow. Second operand 10 states and 216 transitions. [2024-06-14 14:05:46,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 251 transitions, 3003 flow [2024-06-14 14:05:46,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 251 transitions, 2918 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:46,440 INFO L231 Difference]: Finished difference. Result has 201 places, 220 transitions, 2350 flow [2024-06-14 14:05:46,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2350, PETRI_PLACES=201, PETRI_TRANSITIONS=220} [2024-06-14 14:05:46,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-14 14:05:46,440 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 220 transitions, 2350 flow [2024-06-14 14:05:46,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:46,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:46,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 14:05:46,441 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:46,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:46,441 INFO L85 PathProgramCache]: Analyzing trace with hash 147620171, now seen corresponding path program 2 times [2024-06-14 14:05:46,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:46,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641646000] [2024-06-14 14:05:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:46,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:46,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:46,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641646000] [2024-06-14 14:05:46,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641646000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:46,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:46,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:46,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658904881] [2024-06-14 14:05:46,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:46,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:46,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:46,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:46,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:46,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:46,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 220 transitions, 2350 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:46,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:46,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:47,247 INFO L124 PetriNetUnfolderBase]: 1560/2674 cut-off events. [2024-06-14 14:05:47,247 INFO L125 PetriNetUnfolderBase]: For 127771/127771 co-relation queries the response was YES. [2024-06-14 14:05:47,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16193 conditions, 2674 events. 1560/2674 cut-off events. For 127771/127771 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15844 event pairs, 342 based on Foata normal form. 10/2683 useless extension candidates. Maximal degree in co-relation 16103. Up to 2302 conditions per place. [2024-06-14 14:05:47,273 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 185 selfloop transitions, 34 changer transitions 0/245 dead transitions. [2024-06-14 14:05:47,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 245 transitions, 2878 flow [2024-06-14 14:05:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 14:05:47,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 14:05:47,275 INFO L175 Difference]: Start difference. First operand has 201 places, 220 transitions, 2350 flow. Second operand 10 states and 210 transitions. [2024-06-14 14:05:47,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 245 transitions, 2878 flow [2024-06-14 14:05:47,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 245 transitions, 2829 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:47,468 INFO L231 Difference]: Finished difference. Result has 205 places, 221 transitions, 2393 flow [2024-06-14 14:05:47,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2393, PETRI_PLACES=205, PETRI_TRANSITIONS=221} [2024-06-14 14:05:47,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-14 14:05:47,468 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 221 transitions, 2393 flow [2024-06-14 14:05:47,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:47,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:47,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:47,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 14:05:47,469 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:47,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash 834898907, now seen corresponding path program 3 times [2024-06-14 14:05:47,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:47,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744357283] [2024-06-14 14:05:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:47,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:47,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:47,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744357283] [2024-06-14 14:05:47,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744357283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:47,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:47,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:47,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276047292] [2024-06-14 14:05:47,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:47,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:47,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:47,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:47,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:47,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 14:05:47,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 221 transitions, 2393 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:47,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:47,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 14:05:47,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:48,249 INFO L124 PetriNetUnfolderBase]: 1537/2634 cut-off events. [2024-06-14 14:05:48,249 INFO L125 PetriNetUnfolderBase]: For 119594/119594 co-relation queries the response was YES. [2024-06-14 14:05:48,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15677 conditions, 2634 events. 1537/2634 cut-off events. For 119594/119594 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15556 event pairs, 308 based on Foata normal form. 10/2640 useless extension candidates. Maximal degree in co-relation 15585. Up to 2256 conditions per place. [2024-06-14 14:05:48,272 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 189 selfloop transitions, 29 changer transitions 0/244 dead transitions. [2024-06-14 14:05:48,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 244 transitions, 2903 flow [2024-06-14 14:05:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 14:05:48,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-14 14:05:48,273 INFO L175 Difference]: Start difference. First operand has 205 places, 221 transitions, 2393 flow. Second operand 6 states and 145 transitions. [2024-06-14 14:05:48,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 244 transitions, 2903 flow [2024-06-14 14:05:48,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 244 transitions, 2833 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:48,512 INFO L231 Difference]: Finished difference. Result has 203 places, 221 transitions, 2390 flow [2024-06-14 14:05:48,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2323, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2390, PETRI_PLACES=203, PETRI_TRANSITIONS=221} [2024-06-14 14:05:48,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-14 14:05:48,513 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 221 transitions, 2390 flow [2024-06-14 14:05:48,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:48,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:48,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:48,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 14:05:48,514 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:48,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:48,514 INFO L85 PathProgramCache]: Analyzing trace with hash 263096039, now seen corresponding path program 1 times [2024-06-14 14:05:48,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:48,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423241350] [2024-06-14 14:05:48,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:48,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:48,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:48,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423241350] [2024-06-14 14:05:48,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423241350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:48,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:48,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:48,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330112772] [2024-06-14 14:05:48,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:48,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:48,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:48,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:48,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:48,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:48,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 221 transitions, 2390 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:48,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:48,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:48,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:49,379 INFO L124 PetriNetUnfolderBase]: 1604/2710 cut-off events. [2024-06-14 14:05:49,379 INFO L125 PetriNetUnfolderBase]: For 112618/112618 co-relation queries the response was YES. [2024-06-14 14:05:49,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16120 conditions, 2710 events. 1604/2710 cut-off events. For 112618/112618 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 15764 event pairs, 351 based on Foata normal form. 2/2711 useless extension candidates. Maximal degree in co-relation 16027. Up to 2483 conditions per place. [2024-06-14 14:05:49,403 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 210 selfloop transitions, 21 changer transitions 0/237 dead transitions. [2024-06-14 14:05:49,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 237 transitions, 2914 flow [2024-06-14 14:05:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 14:05:49,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 14:05:49,404 INFO L175 Difference]: Start difference. First operand has 203 places, 221 transitions, 2390 flow. Second operand 6 states and 132 transitions. [2024-06-14 14:05:49,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 237 transitions, 2914 flow [2024-06-14 14:05:49,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 237 transitions, 2850 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:49,671 INFO L231 Difference]: Finished difference. Result has 204 places, 223 transitions, 2405 flow [2024-06-14 14:05:49,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2405, PETRI_PLACES=204, PETRI_TRANSITIONS=223} [2024-06-14 14:05:49,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-14 14:05:49,671 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 223 transitions, 2405 flow [2024-06-14 14:05:49,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:49,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:49,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:49,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 14:05:49,672 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:49,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:49,673 INFO L85 PathProgramCache]: Analyzing trace with hash 611465699, now seen corresponding path program 2 times [2024-06-14 14:05:49,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:49,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501894025] [2024-06-14 14:05:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:49,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:49,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:49,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501894025] [2024-06-14 14:05:49,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501894025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:49,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:49,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:49,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34671665] [2024-06-14 14:05:49,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:49,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:49,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:49,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:49,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:50,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:50,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 223 transitions, 2405 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:50,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:50,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:50,366 INFO L124 PetriNetUnfolderBase]: 1612/2722 cut-off events. [2024-06-14 14:05:50,367 INFO L125 PetriNetUnfolderBase]: For 116536/116536 co-relation queries the response was YES. [2024-06-14 14:05:50,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16270 conditions, 2722 events. 1612/2722 cut-off events. For 116536/116536 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15823 event pairs, 353 based on Foata normal form. 2/2723 useless extension candidates. Maximal degree in co-relation 16176. Up to 2489 conditions per place. [2024-06-14 14:05:50,390 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 210 selfloop transitions, 22 changer transitions 0/238 dead transitions. [2024-06-14 14:05:50,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 238 transitions, 2933 flow [2024-06-14 14:05:50,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-14 14:05:50,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 14:05:50,392 INFO L175 Difference]: Start difference. First operand has 204 places, 223 transitions, 2405 flow. Second operand 5 states and 115 transitions. [2024-06-14 14:05:50,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 238 transitions, 2933 flow [2024-06-14 14:05:50,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 238 transitions, 2870 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:50,601 INFO L231 Difference]: Finished difference. Result has 205 places, 225 transitions, 2430 flow [2024-06-14 14:05:50,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2430, PETRI_PLACES=205, PETRI_TRANSITIONS=225} [2024-06-14 14:05:50,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-14 14:05:50,602 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 225 transitions, 2430 flow [2024-06-14 14:05:50,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:50,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:50,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 14:05:50,603 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:50,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:50,603 INFO L85 PathProgramCache]: Analyzing trace with hash 620036579, now seen corresponding path program 3 times [2024-06-14 14:05:50,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:50,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737585612] [2024-06-14 14:05:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:50,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:50,908 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 14:05:50,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737585612] [2024-06-14 14:05:50,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737585612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:50,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:50,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:50,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731140956] [2024-06-14 14:05:50,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:50,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:50,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:50,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:50,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:50,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:50,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 225 transitions, 2430 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:50,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:50,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:51,349 INFO L124 PetriNetUnfolderBase]: 1607/2718 cut-off events. [2024-06-14 14:05:51,349 INFO L125 PetriNetUnfolderBase]: For 117898/117901 co-relation queries the response was YES. [2024-06-14 14:05:51,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16229 conditions, 2718 events. 1607/2718 cut-off events. For 117898/117901 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15860 event pairs, 348 based on Foata normal form. 4/2720 useless extension candidates. Maximal degree in co-relation 16134. Up to 2468 conditions per place. [2024-06-14 14:05:51,376 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 209 selfloop transitions, 23 changer transitions 0/238 dead transitions. [2024-06-14 14:05:51,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 238 transitions, 2956 flow [2024-06-14 14:05:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-14 14:05:51,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-14 14:05:51,378 INFO L175 Difference]: Start difference. First operand has 205 places, 225 transitions, 2430 flow. Second operand 5 states and 112 transitions. [2024-06-14 14:05:51,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 238 transitions, 2956 flow [2024-06-14 14:05:51,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 238 transitions, 2884 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:51,648 INFO L231 Difference]: Finished difference. Result has 207 places, 227 transitions, 2449 flow [2024-06-14 14:05:51,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2362, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2449, PETRI_PLACES=207, PETRI_TRANSITIONS=227} [2024-06-14 14:05:51,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-14 14:05:51,649 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 227 transitions, 2449 flow [2024-06-14 14:05:51,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:51,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:51,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 14:05:51,650 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:51,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:51,650 INFO L85 PathProgramCache]: Analyzing trace with hash -626812721, now seen corresponding path program 1 times [2024-06-14 14:05:51,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:51,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46678092] [2024-06-14 14:05:51,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:51,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:51,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:51,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46678092] [2024-06-14 14:05:51,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46678092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:51,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:51,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:51,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578296842] [2024-06-14 14:05:51,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:51,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:51,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:51,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:51,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:52,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:52,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 227 transitions, 2449 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:52,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:52,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:52,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:52,559 INFO L124 PetriNetUnfolderBase]: 1726/2911 cut-off events. [2024-06-14 14:05:52,559 INFO L125 PetriNetUnfolderBase]: For 154624/154627 co-relation queries the response was YES. [2024-06-14 14:05:52,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17997 conditions, 2911 events. 1726/2911 cut-off events. For 154624/154627 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 17069 event pairs, 302 based on Foata normal form. 14/2923 useless extension candidates. Maximal degree in co-relation 17901. Up to 2283 conditions per place. [2024-06-14 14:05:52,586 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 79 changer transitions 0/265 dead transitions. [2024-06-14 14:05:52,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 265 transitions, 3261 flow [2024-06-14 14:05:52,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:05:52,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 14:05:52,588 INFO L175 Difference]: Start difference. First operand has 207 places, 227 transitions, 2449 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:05:52,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 265 transitions, 3261 flow [2024-06-14 14:05:52,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 265 transitions, 3190 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:52,844 INFO L231 Difference]: Finished difference. Result has 211 places, 231 transitions, 2621 flow [2024-06-14 14:05:52,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=211, PETRI_TRANSITIONS=231} [2024-06-14 14:05:52,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-14 14:05:52,845 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 231 transitions, 2621 flow [2024-06-14 14:05:52,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:52,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:52,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:52,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 14:05:52,846 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:52,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:52,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1776753963, now seen corresponding path program 2 times [2024-06-14 14:05:52,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:52,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810963431] [2024-06-14 14:05:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:52,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:53,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:53,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810963431] [2024-06-14 14:05:53,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810963431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:53,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:53,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:53,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757548760] [2024-06-14 14:05:53,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:53,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:53,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:53,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:53,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:53,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:53,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 231 transitions, 2621 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:53,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:53,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:53,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:53,718 INFO L124 PetriNetUnfolderBase]: 1782/2999 cut-off events. [2024-06-14 14:05:53,718 INFO L125 PetriNetUnfolderBase]: For 169026/169029 co-relation queries the response was YES. [2024-06-14 14:05:53,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18912 conditions, 2999 events. 1782/2999 cut-off events. For 169026/169029 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17697 event pairs, 404 based on Foata normal form. 18/3015 useless extension candidates. Maximal degree in co-relation 18815. Up to 2539 conditions per place. [2024-06-14 14:05:53,749 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 181 selfloop transitions, 73 changer transitions 0/260 dead transitions. [2024-06-14 14:05:53,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 260 transitions, 3255 flow [2024-06-14 14:05:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:05:53,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 14:05:53,750 INFO L175 Difference]: Start difference. First operand has 211 places, 231 transitions, 2621 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:05:53,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 260 transitions, 3255 flow [2024-06-14 14:05:54,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 260 transitions, 3135 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:54,025 INFO L231 Difference]: Finished difference. Result has 215 places, 233 transitions, 2699 flow [2024-06-14 14:05:54,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2699, PETRI_PLACES=215, PETRI_TRANSITIONS=233} [2024-06-14 14:05:54,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-14 14:05:54,026 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 233 transitions, 2699 flow [2024-06-14 14:05:54,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:54,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:54,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 14:05:54,026 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:54,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:54,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1462456565, now seen corresponding path program 3 times [2024-06-14 14:05:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:54,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060414915] [2024-06-14 14:05:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:54,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:54,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:54,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060414915] [2024-06-14 14:05:54,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060414915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:54,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:54,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:54,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134694352] [2024-06-14 14:05:54,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:54,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:54,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:54,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:54,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:54,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:54,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 233 transitions, 2699 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:54,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:54,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:54,918 INFO L124 PetriNetUnfolderBase]: 1838/3087 cut-off events. [2024-06-14 14:05:54,919 INFO L125 PetriNetUnfolderBase]: For 176827/176830 co-relation queries the response was YES. [2024-06-14 14:05:54,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19700 conditions, 3087 events. 1838/3087 cut-off events. For 176827/176830 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18326 event pairs, 412 based on Foata normal form. 18/3103 useless extension candidates. Maximal degree in co-relation 19601. Up to 2627 conditions per place. [2024-06-14 14:05:54,948 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 188 selfloop transitions, 62 changer transitions 0/256 dead transitions. [2024-06-14 14:05:54,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 256 transitions, 3313 flow [2024-06-14 14:05:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 14:05:54,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 14:05:54,949 INFO L175 Difference]: Start difference. First operand has 215 places, 233 transitions, 2699 flow. Second operand 7 states and 161 transitions. [2024-06-14 14:05:54,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 256 transitions, 3313 flow [2024-06-14 14:05:55,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 256 transitions, 3149 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:55,329 INFO L231 Difference]: Finished difference. Result has 217 places, 235 transitions, 2715 flow [2024-06-14 14:05:55,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2535, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2715, PETRI_PLACES=217, PETRI_TRANSITIONS=235} [2024-06-14 14:05:55,329 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-14 14:05:55,329 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 235 transitions, 2715 flow [2024-06-14 14:05:55,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:55,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:55,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 14:05:55,330 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:55,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:55,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1619786457, now seen corresponding path program 1 times [2024-06-14 14:05:55,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:55,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416229506] [2024-06-14 14:05:55,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:55,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:55,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:55,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416229506] [2024-06-14 14:05:55,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416229506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:55,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:55,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:55,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048478019] [2024-06-14 14:05:55,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:55,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:55,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:55,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:55,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:55,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:55,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 235 transitions, 2715 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:55,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:55,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:56,169 INFO L124 PetriNetUnfolderBase]: 1851/3106 cut-off events. [2024-06-14 14:05:56,169 INFO L125 PetriNetUnfolderBase]: For 158822/158822 co-relation queries the response was YES. [2024-06-14 14:05:56,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19817 conditions, 3106 events. 1851/3106 cut-off events. For 158822/158822 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 18469 event pairs, 411 based on Foata normal form. 1/3103 useless extension candidates. Maximal degree in co-relation 19717. Up to 2642 conditions per place. [2024-06-14 14:05:56,201 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 91 changer transitions 0/273 dead transitions. [2024-06-14 14:05:56,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 273 transitions, 3615 flow [2024-06-14 14:05:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 14:05:56,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-14 14:05:56,203 INFO L175 Difference]: Start difference. First operand has 217 places, 235 transitions, 2715 flow. Second operand 11 states and 241 transitions. [2024-06-14 14:05:56,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 273 transitions, 3615 flow [2024-06-14 14:05:56,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 273 transitions, 3469 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:56,528 INFO L231 Difference]: Finished difference. Result has 223 places, 241 transitions, 2817 flow [2024-06-14 14:05:56,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2817, PETRI_PLACES=223, PETRI_TRANSITIONS=241} [2024-06-14 14:05:56,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 14:05:56,529 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 241 transitions, 2817 flow [2024-06-14 14:05:56,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:56,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:56,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:56,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 14:05:56,530 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:56,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:56,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1619906427, now seen corresponding path program 2 times [2024-06-14 14:05:56,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:56,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688314439] [2024-06-14 14:05:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:56,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:56,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:56,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688314439] [2024-06-14 14:05:56,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688314439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:56,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:56,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:56,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073989933] [2024-06-14 14:05:56,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:56,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:56,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:56,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:56,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:56,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 241 transitions, 2817 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:56,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:56,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:56,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:57,490 INFO L124 PetriNetUnfolderBase]: 1848/3107 cut-off events. [2024-06-14 14:05:57,490 INFO L125 PetriNetUnfolderBase]: For 160686/160689 co-relation queries the response was YES. [2024-06-14 14:05:57,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19709 conditions, 3107 events. 1848/3107 cut-off events. For 160686/160689 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 18502 event pairs, 411 based on Foata normal form. 3/3108 useless extension candidates. Maximal degree in co-relation 19608. Up to 2763 conditions per place. [2024-06-14 14:05:57,520 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 223 selfloop transitions, 37 changer transitions 0/266 dead transitions. [2024-06-14 14:05:57,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 266 transitions, 3401 flow [2024-06-14 14:05:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:05:57,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-14 14:05:57,522 INFO L175 Difference]: Start difference. First operand has 223 places, 241 transitions, 2817 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:05:57,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 266 transitions, 3401 flow [2024-06-14 14:05:57,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 266 transitions, 3222 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:57,925 INFO L231 Difference]: Finished difference. Result has 221 places, 241 transitions, 2722 flow [2024-06-14 14:05:57,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2638, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2722, PETRI_PLACES=221, PETRI_TRANSITIONS=241} [2024-06-14 14:05:57,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-14 14:05:57,926 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 241 transitions, 2722 flow [2024-06-14 14:05:57,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:57,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:57,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:57,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 14:05:57,927 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:57,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1625148837, now seen corresponding path program 3 times [2024-06-14 14:05:57,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:57,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118360667] [2024-06-14 14:05:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:57,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:58,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:58,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118360667] [2024-06-14 14:05:58,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118360667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:58,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:58,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:58,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956272125] [2024-06-14 14:05:58,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:58,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:58,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:58,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:58,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:58,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:58,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 241 transitions, 2722 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:58,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:58,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:58,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:58,772 INFO L124 PetriNetUnfolderBase]: 1861/3126 cut-off events. [2024-06-14 14:05:58,773 INFO L125 PetriNetUnfolderBase]: For 167062/167062 co-relation queries the response was YES. [2024-06-14 14:05:58,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19696 conditions, 3126 events. 1861/3126 cut-off events. For 167062/167062 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18621 event pairs, 413 based on Foata normal form. 1/3123 useless extension candidates. Maximal degree in co-relation 19596. Up to 2654 conditions per place. [2024-06-14 14:05:58,804 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 181 selfloop transitions, 89 changer transitions 0/276 dead transitions. [2024-06-14 14:05:58,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 276 transitions, 3634 flow [2024-06-14 14:05:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:05:58,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 14:05:58,806 INFO L175 Difference]: Start difference. First operand has 221 places, 241 transitions, 2722 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:05:58,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 276 transitions, 3634 flow [2024-06-14 14:05:59,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 276 transitions, 3550 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:59,153 INFO L231 Difference]: Finished difference. Result has 226 places, 247 transitions, 2892 flow [2024-06-14 14:05:59,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2892, PETRI_PLACES=226, PETRI_TRANSITIONS=247} [2024-06-14 14:05:59,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 14:05:59,154 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 247 transitions, 2892 flow [2024-06-14 14:05:59,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:59,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:59,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:59,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 14:05:59,154 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:59,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1253554605, now seen corresponding path program 1 times [2024-06-14 14:05:59,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:59,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144747997] [2024-06-14 14:05:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:59,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:59,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:59,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144747997] [2024-06-14 14:05:59,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144747997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:59,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:59,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:59,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740624782] [2024-06-14 14:05:59,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:59,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:59,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:59,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:59,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 247 transitions, 2892 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:59,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:59,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:59,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:00,008 INFO L124 PetriNetUnfolderBase]: 1887/3170 cut-off events. [2024-06-14 14:06:00,008 INFO L125 PetriNetUnfolderBase]: For 173048/173048 co-relation queries the response was YES. [2024-06-14 14:06:00,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20215 conditions, 3170 events. 1887/3170 cut-off events. For 173048/173048 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18957 event pairs, 411 based on Foata normal form. 2/3168 useless extension candidates. Maximal degree in co-relation 20115. Up to 2534 conditions per place. [2024-06-14 14:06:00,040 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 120 changer transitions 0/289 dead transitions. [2024-06-14 14:06:00,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 289 transitions, 3952 flow [2024-06-14 14:06:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:06:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:06:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-14 14:06:00,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 14:06:00,042 INFO L175 Difference]: Start difference. First operand has 226 places, 247 transitions, 2892 flow. Second operand 12 states and 261 transitions. [2024-06-14 14:06:00,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 289 transitions, 3952 flow [2024-06-14 14:06:00,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 289 transitions, 3793 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:00,466 INFO L231 Difference]: Finished difference. Result has 232 places, 258 transitions, 3157 flow [2024-06-14 14:06:00,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2733, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3157, PETRI_PLACES=232, PETRI_TRANSITIONS=258} [2024-06-14 14:06:00,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-14 14:06:00,467 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 258 transitions, 3157 flow [2024-06-14 14:06:00,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:00,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:00,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 14:06:00,467 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:00,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1625447367, now seen corresponding path program 4 times [2024-06-14 14:06:00,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:00,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654993365] [2024-06-14 14:06:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:00,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:00,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:00,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654993365] [2024-06-14 14:06:00,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654993365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:00,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:00,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:00,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811206049] [2024-06-14 14:06:00,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:00,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:00,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:00,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:00,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 258 transitions, 3157 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:00,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:00,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:01,338 INFO L124 PetriNetUnfolderBase]: 1892/3179 cut-off events. [2024-06-14 14:06:01,338 INFO L125 PetriNetUnfolderBase]: For 178960/178960 co-relation queries the response was YES. [2024-06-14 14:06:01,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20912 conditions, 3179 events. 1892/3179 cut-off events. For 178960/178960 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19011 event pairs, 411 based on Foata normal form. 1/3176 useless extension candidates. Maximal degree in co-relation 20810. Up to 2696 conditions per place. [2024-06-14 14:06:01,367 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 88 changer transitions 0/286 dead transitions. [2024-06-14 14:06:01,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 286 transitions, 4049 flow [2024-06-14 14:06:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-14 14:06:01,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-14 14:06:01,368 INFO L175 Difference]: Start difference. First operand has 232 places, 258 transitions, 3157 flow. Second operand 10 states and 217 transitions. [2024-06-14 14:06:01,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 286 transitions, 4049 flow [2024-06-14 14:06:01,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 286 transitions, 3890 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:01,699 INFO L231 Difference]: Finished difference. Result has 236 places, 261 transitions, 3213 flow [2024-06-14 14:06:01,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3213, PETRI_PLACES=236, PETRI_TRANSITIONS=261} [2024-06-14 14:06:01,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-14 14:06:01,700 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 261 transitions, 3213 flow [2024-06-14 14:06:01,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:01,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:01,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:01,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 14:06:01,701 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:01,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:01,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1249835907, now seen corresponding path program 5 times [2024-06-14 14:06:01,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:01,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57025993] [2024-06-14 14:06:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:02,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:02,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57025993] [2024-06-14 14:06:02,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57025993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:02,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:02,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:02,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863444249] [2024-06-14 14:06:02,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:02,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:02,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:02,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:02,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 261 transitions, 3213 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:02,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:02,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:02,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:02,672 INFO L124 PetriNetUnfolderBase]: 1889/3172 cut-off events. [2024-06-14 14:06:02,672 INFO L125 PetriNetUnfolderBase]: For 182286/182289 co-relation queries the response was YES. [2024-06-14 14:06:02,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20996 conditions, 3172 events. 1889/3172 cut-off events. For 182286/182289 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18945 event pairs, 407 based on Foata normal form. 3/3173 useless extension candidates. Maximal degree in co-relation 20892. Up to 2765 conditions per place. [2024-06-14 14:06:02,705 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 228 selfloop transitions, 49 changer transitions 0/283 dead transitions. [2024-06-14 14:06:02,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 283 transitions, 3823 flow [2024-06-14 14:06:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:02,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 14:06:02,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-14 14:06:02,706 INFO L175 Difference]: Start difference. First operand has 236 places, 261 transitions, 3213 flow. Second operand 6 states and 145 transitions. [2024-06-14 14:06:02,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 283 transitions, 3823 flow [2024-06-14 14:06:03,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 283 transitions, 3658 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:03,066 INFO L231 Difference]: Finished difference. Result has 235 places, 261 transitions, 3158 flow [2024-06-14 14:06:03,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3158, PETRI_PLACES=235, PETRI_TRANSITIONS=261} [2024-06-14 14:06:03,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 14:06:03,067 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 261 transitions, 3158 flow [2024-06-14 14:06:03,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:03,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:03,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:03,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 14:06:03,067 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:03,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:03,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1249835535, now seen corresponding path program 2 times [2024-06-14 14:06:03,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:03,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997664320] [2024-06-14 14:06:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:03,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:03,371 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 14:06:03,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:03,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997664320] [2024-06-14 14:06:03,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997664320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:03,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:03,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:03,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289762982] [2024-06-14 14:06:03,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:03,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:03,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:03,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:03,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:03,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:03,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 261 transitions, 3158 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:03,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:03,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:03,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:03,982 INFO L124 PetriNetUnfolderBase]: 1899/3190 cut-off events. [2024-06-14 14:06:03,982 INFO L125 PetriNetUnfolderBase]: For 189759/189762 co-relation queries the response was YES. [2024-06-14 14:06:04,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21107 conditions, 3190 events. 1899/3190 cut-off events. For 189759/189762 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 19086 event pairs, 410 based on Foata normal form. 4/3192 useless extension candidates. Maximal degree in co-relation 21002. Up to 2730 conditions per place. [2024-06-14 14:06:04,013 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 202 selfloop transitions, 81 changer transitions 0/289 dead transitions. [2024-06-14 14:06:04,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 289 transitions, 3960 flow [2024-06-14 14:06:04,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 14:06:04,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 14:06:04,015 INFO L175 Difference]: Start difference. First operand has 235 places, 261 transitions, 3158 flow. Second operand 7 states and 169 transitions. [2024-06-14 14:06:04,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 289 transitions, 3960 flow [2024-06-14 14:06:04,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 289 transitions, 3863 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:04,398 INFO L231 Difference]: Finished difference. Result has 237 places, 265 transitions, 3284 flow [2024-06-14 14:06:04,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3063, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3284, PETRI_PLACES=237, PETRI_TRANSITIONS=265} [2024-06-14 14:06:04,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-14 14:06:04,399 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 265 transitions, 3284 flow [2024-06-14 14:06:04,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:04,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:04,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:04,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 14:06:04,399 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:04,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:04,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1249829955, now seen corresponding path program 3 times [2024-06-14 14:06:04,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:04,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346111371] [2024-06-14 14:06:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:04,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:04,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:04,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346111371] [2024-06-14 14:06:04,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346111371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:04,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:04,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:04,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701074420] [2024-06-14 14:06:04,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:04,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:04,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:04,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:04,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:04,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 265 transitions, 3284 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:04,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:04,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:04,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:05,297 INFO L124 PetriNetUnfolderBase]: 1909/3208 cut-off events. [2024-06-14 14:06:05,297 INFO L125 PetriNetUnfolderBase]: For 189996/189999 co-relation queries the response was YES. [2024-06-14 14:06:05,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21318 conditions, 3208 events. 1909/3208 cut-off events. For 189996/189999 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19278 event pairs, 410 based on Foata normal form. 4/3210 useless extension candidates. Maximal degree in co-relation 21213. Up to 2742 conditions per place. [2024-06-14 14:06:05,332 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 203 selfloop transitions, 86 changer transitions 0/295 dead transitions. [2024-06-14 14:06:05,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 295 transitions, 4110 flow [2024-06-14 14:06:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:05,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-14 14:06:05,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 14:06:05,334 INFO L175 Difference]: Start difference. First operand has 237 places, 265 transitions, 3284 flow. Second operand 9 states and 205 transitions. [2024-06-14 14:06:05,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 295 transitions, 4110 flow [2024-06-14 14:06:05,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 295 transitions, 3934 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:05,740 INFO L231 Difference]: Finished difference. Result has 242 places, 269 transitions, 3347 flow [2024-06-14 14:06:05,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3347, PETRI_PLACES=242, PETRI_TRANSITIONS=269} [2024-06-14 14:06:05,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 14:06:05,741 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 269 transitions, 3347 flow [2024-06-14 14:06:05,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:05,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:05,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:05,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 14:06:05,742 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:05,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash -399178587, now seen corresponding path program 4 times [2024-06-14 14:06:05,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:05,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138238224] [2024-06-14 14:06:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:05,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:06,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:06,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138238224] [2024-06-14 14:06:06,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138238224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:06,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:06,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:06,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588524230] [2024-06-14 14:06:06,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:06,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:06,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:06,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:06,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:06,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:06,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 269 transitions, 3347 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:06,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:06,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:06,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:06,584 INFO L124 PetriNetUnfolderBase]: 1951/3278 cut-off events. [2024-06-14 14:06:06,585 INFO L125 PetriNetUnfolderBase]: For 204298/204301 co-relation queries the response was YES. [2024-06-14 14:06:06,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22084 conditions, 3278 events. 1951/3278 cut-off events. For 204298/204301 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19762 event pairs, 410 based on Foata normal form. 4/3280 useless extension candidates. Maximal degree in co-relation 21978. Up to 2714 conditions per place. [2024-06-14 14:06:06,621 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 199 selfloop transitions, 100 changer transitions 0/305 dead transitions. [2024-06-14 14:06:06,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 305 transitions, 4447 flow [2024-06-14 14:06:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 14:06:06,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-14 14:06:06,622 INFO L175 Difference]: Start difference. First operand has 242 places, 269 transitions, 3347 flow. Second operand 9 states and 202 transitions. [2024-06-14 14:06:06,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 305 transitions, 4447 flow [2024-06-14 14:06:07,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 305 transitions, 4235 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:07,074 INFO L231 Difference]: Finished difference. Result has 244 places, 279 transitions, 3474 flow [2024-06-14 14:06:07,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3143, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3474, PETRI_PLACES=244, PETRI_TRANSITIONS=279} [2024-06-14 14:06:07,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-14 14:06:07,075 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 279 transitions, 3474 flow [2024-06-14 14:06:07,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:07,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:07,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:07,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 14:06:07,075 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:07,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:07,076 INFO L85 PathProgramCache]: Analyzing trace with hash -46091899, now seen corresponding path program 1 times [2024-06-14 14:06:07,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:07,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410532105] [2024-06-14 14:06:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:07,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:07,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:07,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410532105] [2024-06-14 14:06:07,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410532105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:07,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:07,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:07,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135425692] [2024-06-14 14:06:07,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:07,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:07,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:07,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:07,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:07,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 279 transitions, 3474 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:07,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:07,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:07,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:08,063 INFO L124 PetriNetUnfolderBase]: 2057/3458 cut-off events. [2024-06-14 14:06:08,063 INFO L125 PetriNetUnfolderBase]: For 251212/251215 co-relation queries the response was YES. [2024-06-14 14:06:08,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23922 conditions, 3458 events. 2057/3458 cut-off events. For 251212/251215 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 21008 event pairs, 428 based on Foata normal form. 14/3470 useless extension candidates. Maximal degree in co-relation 23815. Up to 2708 conditions per place. [2024-06-14 14:06:08,098 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 240 selfloop transitions, 62 changer transitions 0/308 dead transitions. [2024-06-14 14:06:08,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 308 transitions, 4390 flow [2024-06-14 14:06:08,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 14:06:08,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:06:08,100 INFO L175 Difference]: Start difference. First operand has 244 places, 279 transitions, 3474 flow. Second operand 7 states and 164 transitions. [2024-06-14 14:06:08,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 308 transitions, 4390 flow [2024-06-14 14:06:08,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 308 transitions, 4268 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:08,670 INFO L231 Difference]: Finished difference. Result has 248 places, 283 transitions, 3598 flow [2024-06-14 14:06:08,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3598, PETRI_PLACES=248, PETRI_TRANSITIONS=283} [2024-06-14 14:06:08,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-14 14:06:08,670 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 283 transitions, 3598 flow [2024-06-14 14:06:08,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:08,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:08,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:08,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 14:06:08,671 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:08,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:08,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1597852455, now seen corresponding path program 4 times [2024-06-14 14:06:08,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:08,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194876777] [2024-06-14 14:06:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:08,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:09,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194876777] [2024-06-14 14:06:09,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194876777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:09,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:09,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:09,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507708767] [2024-06-14 14:06:09,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:09,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:09,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:09,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:09,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:09,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 283 transitions, 3598 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:09,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:09,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:09,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:09,632 INFO L124 PetriNetUnfolderBase]: 2021/3406 cut-off events. [2024-06-14 14:06:09,633 INFO L125 PetriNetUnfolderBase]: For 236352/236355 co-relation queries the response was YES. [2024-06-14 14:06:09,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23015 conditions, 3406 events. 2021/3406 cut-off events. For 236352/236355 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20686 event pairs, 332 based on Foata normal form. 18/3422 useless extension candidates. Maximal degree in co-relation 22905. Up to 2866 conditions per place. [2024-06-14 14:06:09,672 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 246 selfloop transitions, 60 changer transitions 0/312 dead transitions. [2024-06-14 14:06:09,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 312 transitions, 4304 flow [2024-06-14 14:06:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 14:06:09,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-14 14:06:09,673 INFO L175 Difference]: Start difference. First operand has 248 places, 283 transitions, 3598 flow. Second operand 6 states and 155 transitions. [2024-06-14 14:06:09,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 312 transitions, 4304 flow [2024-06-14 14:06:10,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 312 transitions, 4180 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:10,237 INFO L231 Difference]: Finished difference. Result has 251 places, 283 transitions, 3607 flow [2024-06-14 14:06:10,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3607, PETRI_PLACES=251, PETRI_TRANSITIONS=283} [2024-06-14 14:06:10,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-14 14:06:10,238 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 283 transitions, 3607 flow [2024-06-14 14:06:10,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:10,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:10,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:10,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 14:06:10,239 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:10,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:10,239 INFO L85 PathProgramCache]: Analyzing trace with hash 961723539, now seen corresponding path program 5 times [2024-06-14 14:06:10,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:10,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656642394] [2024-06-14 14:06:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:10,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:10,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:10,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656642394] [2024-06-14 14:06:10,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656642394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:10,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:10,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:10,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619907690] [2024-06-14 14:06:10,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:10,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:10,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:10,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:10,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:10,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 283 transitions, 3607 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:10,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:10,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:10,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:11,214 INFO L124 PetriNetUnfolderBase]: 2145/3600 cut-off events. [2024-06-14 14:06:11,214 INFO L125 PetriNetUnfolderBase]: For 216283/216283 co-relation queries the response was YES. [2024-06-14 14:06:11,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24585 conditions, 3600 events. 2145/3600 cut-off events. For 216283/216283 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22109 event pairs, 447 based on Foata normal form. 1/3594 useless extension candidates. Maximal degree in co-relation 24473. Up to 3055 conditions per place. [2024-06-14 14:06:11,254 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 257 selfloop transitions, 104 changer transitions 0/367 dead transitions. [2024-06-14 14:06:11,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 367 transitions, 5521 flow [2024-06-14 14:06:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:06:11,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 14:06:11,255 INFO L175 Difference]: Start difference. First operand has 251 places, 283 transitions, 3607 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:06:11,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 367 transitions, 5521 flow [2024-06-14 14:06:11,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 367 transitions, 5355 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:11,768 INFO L231 Difference]: Finished difference. Result has 260 places, 330 transitions, 4509 flow [2024-06-14 14:06:11,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4509, PETRI_PLACES=260, PETRI_TRANSITIONS=330} [2024-06-14 14:06:11,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-14 14:06:11,769 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 330 transitions, 4509 flow [2024-06-14 14:06:11,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:11,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:11,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:11,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 14:06:11,769 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:11,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash -818202721, now seen corresponding path program 6 times [2024-06-14 14:06:11,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:11,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360541967] [2024-06-14 14:06:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:11,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:12,073 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 14:06:12,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:12,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360541967] [2024-06-14 14:06:12,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360541967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:12,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:12,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:12,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261805358] [2024-06-14 14:06:12,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:12,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:12,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:12,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:12,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:12,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 330 transitions, 4509 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:12,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:12,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:12,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:12,783 INFO L124 PetriNetUnfolderBase]: 2155/3622 cut-off events. [2024-06-14 14:06:12,783 INFO L125 PetriNetUnfolderBase]: For 224931/224931 co-relation queries the response was YES. [2024-06-14 14:06:12,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25120 conditions, 3622 events. 2155/3622 cut-off events. For 224931/224931 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22328 event pairs, 448 based on Foata normal form. 2/3619 useless extension candidates. Maximal degree in co-relation 25004. Up to 3079 conditions per place. [2024-06-14 14:06:12,825 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 248 selfloop transitions, 113 changer transitions 0/367 dead transitions. [2024-06-14 14:06:12,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 367 transitions, 5849 flow [2024-06-14 14:06:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 14:06:12,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 14:06:12,826 INFO L175 Difference]: Start difference. First operand has 260 places, 330 transitions, 4509 flow. Second operand 9 states and 200 transitions. [2024-06-14 14:06:12,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 367 transitions, 5849 flow [2024-06-14 14:06:13,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 367 transitions, 5700 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:13,433 INFO L231 Difference]: Finished difference. Result has 265 places, 343 transitions, 4918 flow [2024-06-14 14:06:13,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4918, PETRI_PLACES=265, PETRI_TRANSITIONS=343} [2024-06-14 14:06:13,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-14 14:06:13,434 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 343 transitions, 4918 flow [2024-06-14 14:06:13,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:13,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:13,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:13,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 14:06:13,434 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:13,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:13,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1455437297, now seen corresponding path program 7 times [2024-06-14 14:06:13,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:13,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596656525] [2024-06-14 14:06:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:13,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:13,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:13,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596656525] [2024-06-14 14:06:13,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596656525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:13,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:13,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:13,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270902733] [2024-06-14 14:06:13,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:13,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:13,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:13,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:13,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:13,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:13,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 343 transitions, 4918 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:13,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:13,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:13,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:14,445 INFO L124 PetriNetUnfolderBase]: 2149/3614 cut-off events. [2024-06-14 14:06:14,445 INFO L125 PetriNetUnfolderBase]: For 226953/226953 co-relation queries the response was YES. [2024-06-14 14:06:14,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25272 conditions, 3614 events. 2149/3614 cut-off events. For 226953/226953 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22303 event pairs, 448 based on Foata normal form. 2/3611 useless extension candidates. Maximal degree in co-relation 25153. Up to 3073 conditions per place. [2024-06-14 14:06:14,487 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 112 changer transitions 0/364 dead transitions. [2024-06-14 14:06:14,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 364 transitions, 5822 flow [2024-06-14 14:06:14,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 14:06:14,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 14:06:14,488 INFO L175 Difference]: Start difference. First operand has 265 places, 343 transitions, 4918 flow. Second operand 7 states and 165 transitions. [2024-06-14 14:06:14,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 364 transitions, 5822 flow [2024-06-14 14:06:15,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 364 transitions, 5547 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:15,290 INFO L231 Difference]: Finished difference. Result has 268 places, 343 transitions, 4876 flow [2024-06-14 14:06:15,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4876, PETRI_PLACES=268, PETRI_TRANSITIONS=343} [2024-06-14 14:06:15,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-14 14:06:15,290 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 343 transitions, 4876 flow [2024-06-14 14:06:15,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:15,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:15,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:15,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 14:06:15,291 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:15,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:15,291 INFO L85 PathProgramCache]: Analyzing trace with hash -73579617, now seen corresponding path program 6 times [2024-06-14 14:06:15,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:15,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185061356] [2024-06-14 14:06:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:15,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:15,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:15,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185061356] [2024-06-14 14:06:15,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185061356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:15,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:15,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:15,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646265908] [2024-06-14 14:06:15,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:15,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:15,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:15,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:15,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:15,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:15,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 343 transitions, 4876 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:15,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:15,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:15,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:16,350 INFO L124 PetriNetUnfolderBase]: 2154/3632 cut-off events. [2024-06-14 14:06:16,351 INFO L125 PetriNetUnfolderBase]: For 230500/230503 co-relation queries the response was YES. [2024-06-14 14:06:16,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25505 conditions, 3632 events. 2154/3632 cut-off events. For 230500/230503 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22486 event pairs, 451 based on Foata normal form. 3/3627 useless extension candidates. Maximal degree in co-relation 25384. Up to 3047 conditions per place. [2024-06-14 14:06:16,391 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 265 selfloop transitions, 100 changer transitions 0/371 dead transitions. [2024-06-14 14:06:16,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 371 transitions, 5844 flow [2024-06-14 14:06:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-14 14:06:16,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-14 14:06:16,393 INFO L175 Difference]: Start difference. First operand has 268 places, 343 transitions, 4876 flow. Second operand 11 states and 230 transitions. [2024-06-14 14:06:16,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 371 transitions, 5844 flow [2024-06-14 14:06:17,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 371 transitions, 5616 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:17,008 INFO L231 Difference]: Finished difference. Result has 273 places, 346 transitions, 4894 flow [2024-06-14 14:06:17,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4648, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4894, PETRI_PLACES=273, PETRI_TRANSITIONS=346} [2024-06-14 14:06:17,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-14 14:06:17,008 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 346 transitions, 4894 flow [2024-06-14 14:06:17,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:17,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:17,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 14:06:17,009 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:17,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:17,009 INFO L85 PathProgramCache]: Analyzing trace with hash -563275775, now seen corresponding path program 7 times [2024-06-14 14:06:17,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:17,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034747529] [2024-06-14 14:06:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:17,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:17,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:17,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034747529] [2024-06-14 14:06:17,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034747529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:17,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:17,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:17,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274117309] [2024-06-14 14:06:17,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:17,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:17,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:17,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:17,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:17,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 346 transitions, 4894 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:17,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:17,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:17,911 INFO L124 PetriNetUnfolderBase]: 2159/3641 cut-off events. [2024-06-14 14:06:17,911 INFO L125 PetriNetUnfolderBase]: For 235872/235875 co-relation queries the response was YES. [2024-06-14 14:06:17,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25639 conditions, 3641 events. 2159/3641 cut-off events. For 235872/235875 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22557 event pairs, 452 based on Foata normal form. 3/3636 useless extension candidates. Maximal degree in co-relation 25517. Up to 3053 conditions per place. [2024-06-14 14:06:17,953 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 265 selfloop transitions, 99 changer transitions 0/370 dead transitions. [2024-06-14 14:06:17,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 370 transitions, 5858 flow [2024-06-14 14:06:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:17,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 14:06:17,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-14 14:06:17,954 INFO L175 Difference]: Start difference. First operand has 273 places, 346 transitions, 4894 flow. Second operand 10 states and 213 transitions. [2024-06-14 14:06:17,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 370 transitions, 5858 flow [2024-06-14 14:06:18,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 370 transitions, 5671 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:18,611 INFO L231 Difference]: Finished difference. Result has 277 places, 349 transitions, 4957 flow [2024-06-14 14:06:18,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4718, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4957, PETRI_PLACES=277, PETRI_TRANSITIONS=349} [2024-06-14 14:06:18,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-14 14:06:18,611 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 349 transitions, 4957 flow [2024-06-14 14:06:18,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:18,612 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] [2024-06-14 14:06:18,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 14:06:18,612 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:18,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash -563275403, now seen corresponding path program 8 times [2024-06-14 14:06:18,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:18,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186885708] [2024-06-14 14:06:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:18,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:18,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:18,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186885708] [2024-06-14 14:06:18,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186885708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:18,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:18,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:18,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118472437] [2024-06-14 14:06:18,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:18,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:18,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:18,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:18,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:18,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:18,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 349 transitions, 4957 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:18,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:18,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:19,597 INFO L124 PetriNetUnfolderBase]: 2164/3637 cut-off events. [2024-06-14 14:06:19,597 INFO L125 PetriNetUnfolderBase]: For 242103/242103 co-relation queries the response was YES. [2024-06-14 14:06:19,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25775 conditions, 3637 events. 2164/3637 cut-off events. For 242103/242103 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22457 event pairs, 447 based on Foata normal form. 1/3631 useless extension candidates. Maximal degree in co-relation 25651. Up to 3081 conditions per place. [2024-06-14 14:06:19,640 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 269 selfloop transitions, 114 changer transitions 0/389 dead transitions. [2024-06-14 14:06:19,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 389 transitions, 6332 flow [2024-06-14 14:06:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:06:19,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 14:06:19,641 INFO L175 Difference]: Start difference. First operand has 277 places, 349 transitions, 4957 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:06:19,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 389 transitions, 6332 flow [2024-06-14 14:06:20,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 389 transitions, 6128 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:20,502 INFO L231 Difference]: Finished difference. Result has 282 places, 356 transitions, 5169 flow [2024-06-14 14:06:20,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5169, PETRI_PLACES=282, PETRI_TRANSITIONS=356} [2024-06-14 14:06:20,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-14 14:06:20,503 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 356 transitions, 5169 flow [2024-06-14 14:06:20,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:20,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:20,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 14:06:20,503 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:20,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:20,503 INFO L85 PathProgramCache]: Analyzing trace with hash 832727315, now seen corresponding path program 8 times [2024-06-14 14:06:20,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:20,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807878482] [2024-06-14 14:06:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:20,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:20,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:20,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807878482] [2024-06-14 14:06:20,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807878482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:20,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:20,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:20,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622160360] [2024-06-14 14:06:20,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:20,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:20,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:20,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:20,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:20,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:20,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 356 transitions, 5169 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:20,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:20,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:21,562 INFO L124 PetriNetUnfolderBase]: 2169/3661 cut-off events. [2024-06-14 14:06:21,562 INFO L125 PetriNetUnfolderBase]: For 249297/249300 co-relation queries the response was YES. [2024-06-14 14:06:21,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26012 conditions, 3661 events. 2169/3661 cut-off events. For 249297/249300 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22772 event pairs, 454 based on Foata normal form. 3/3656 useless extension candidates. Maximal degree in co-relation 25886. Up to 3066 conditions per place. [2024-06-14 14:06:21,601 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 269 selfloop transitions, 101 changer transitions 0/376 dead transitions. [2024-06-14 14:06:21,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 376 transitions, 6131 flow [2024-06-14 14:06:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 14:06:21,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 14:06:21,602 INFO L175 Difference]: Start difference. First operand has 282 places, 356 transitions, 5169 flow. Second operand 9 states and 192 transitions. [2024-06-14 14:06:21,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 376 transitions, 6131 flow [2024-06-14 14:06:22,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 376 transitions, 5945 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:22,312 INFO L231 Difference]: Finished difference. Result has 285 places, 359 transitions, 5229 flow [2024-06-14 14:06:22,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4983, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5229, PETRI_PLACES=285, PETRI_TRANSITIONS=359} [2024-06-14 14:06:22,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-14 14:06:22,313 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 359 transitions, 5229 flow [2024-06-14 14:06:22,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:22,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:22,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 14:06:22,313 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:22,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:22,313 INFO L85 PathProgramCache]: Analyzing trace with hash -208596653, now seen corresponding path program 9 times [2024-06-14 14:06:22,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:22,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096019806] [2024-06-14 14:06:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:22,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:22,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:22,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096019806] [2024-06-14 14:06:22,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096019806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:22,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:22,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:22,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476447488] [2024-06-14 14:06:22,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:22,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:22,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:22,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:22,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 359 transitions, 5229 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:22,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:22,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:23,341 INFO L124 PetriNetUnfolderBase]: 2174/3667 cut-off events. [2024-06-14 14:06:23,341 INFO L125 PetriNetUnfolderBase]: For 254371/254371 co-relation queries the response was YES. [2024-06-14 14:06:23,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26121 conditions, 3667 events. 2174/3667 cut-off events. For 254371/254371 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22700 event pairs, 420 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 25994. Up to 3325 conditions per place. [2024-06-14 14:06:23,384 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 349 selfloop transitions, 29 changer transitions 0/384 dead transitions. [2024-06-14 14:06:23,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 384 transitions, 6117 flow [2024-06-14 14:06:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:23,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-14 14:06:23,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902439024390244 [2024-06-14 14:06:23,385 INFO L175 Difference]: Start difference. First operand has 285 places, 359 transitions, 5229 flow. Second operand 10 states and 201 transitions. [2024-06-14 14:06:23,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 384 transitions, 6117 flow [2024-06-14 14:06:24,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 384 transitions, 5874 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:24,271 INFO L231 Difference]: Finished difference. Result has 288 places, 362 transitions, 5113 flow [2024-06-14 14:06:24,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4989, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5113, PETRI_PLACES=288, PETRI_TRANSITIONS=362} [2024-06-14 14:06:24,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-14 14:06:24,272 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 362 transitions, 5113 flow [2024-06-14 14:06:24,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:24,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:24,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 14:06:24,272 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:24,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash 280982325, now seen corresponding path program 10 times [2024-06-14 14:06:24,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:24,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781262659] [2024-06-14 14:06:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:24,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:24,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:24,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781262659] [2024-06-14 14:06:24,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781262659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:24,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:24,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:24,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980582586] [2024-06-14 14:06:24,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:24,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:24,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:24,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:24,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:24,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:24,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 362 transitions, 5113 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:24,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:24,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:25,215 INFO L124 PetriNetUnfolderBase]: 2179/3665 cut-off events. [2024-06-14 14:06:25,215 INFO L125 PetriNetUnfolderBase]: For 260186/260186 co-relation queries the response was YES. [2024-06-14 14:06:25,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25869 conditions, 3665 events. 2179/3665 cut-off events. For 260186/260186 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22636 event pairs, 449 based on Foata normal form. 1/3659 useless extension candidates. Maximal degree in co-relation 25742. Up to 2810 conditions per place. [2024-06-14 14:06:25,260 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 153 selfloop transitions, 232 changer transitions 0/391 dead transitions. [2024-06-14 14:06:25,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 391 transitions, 6359 flow [2024-06-14 14:06:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 14:06:25,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-14 14:06:25,262 INFO L175 Difference]: Start difference. First operand has 288 places, 362 transitions, 5113 flow. Second operand 11 states and 241 transitions. [2024-06-14 14:06:25,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 391 transitions, 6359 flow [2024-06-14 14:06:26,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 391 transitions, 6267 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:26,018 INFO L231 Difference]: Finished difference. Result has 294 places, 368 transitions, 5705 flow [2024-06-14 14:06:26,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5021, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5705, PETRI_PLACES=294, PETRI_TRANSITIONS=368} [2024-06-14 14:06:26,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-14 14:06:26,019 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 368 transitions, 5705 flow [2024-06-14 14:06:26,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:26,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:26,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:26,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 14:06:26,019 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:26,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:26,020 INFO L85 PathProgramCache]: Analyzing trace with hash -434417761, now seen corresponding path program 11 times [2024-06-14 14:06:26,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:26,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727692178] [2024-06-14 14:06:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:26,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:26,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:26,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727692178] [2024-06-14 14:06:26,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727692178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:26,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:26,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:26,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053843963] [2024-06-14 14:06:26,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:26,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:26,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:26,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:26,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:26,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:26,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 368 transitions, 5705 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:26,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:26,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:26,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:27,151 INFO L124 PetriNetUnfolderBase]: 2202/3714 cut-off events. [2024-06-14 14:06:27,151 INFO L125 PetriNetUnfolderBase]: For 275320/275320 co-relation queries the response was YES. [2024-06-14 14:06:27,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27162 conditions, 3714 events. 2202/3714 cut-off events. For 275320/275320 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 23105 event pairs, 421 based on Foata normal form. 2/3715 useless extension candidates. Maximal degree in co-relation 27033. Up to 3327 conditions per place. [2024-06-14 14:06:27,196 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 335 selfloop transitions, 59 changer transitions 0/400 dead transitions. [2024-06-14 14:06:27,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 400 transitions, 6946 flow [2024-06-14 14:06:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 14:06:27,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-14 14:06:27,198 INFO L175 Difference]: Start difference. First operand has 294 places, 368 transitions, 5705 flow. Second operand 9 states and 190 transitions. [2024-06-14 14:06:27,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 400 transitions, 6946 flow [2024-06-14 14:06:28,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 400 transitions, 6586 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:28,185 INFO L231 Difference]: Finished difference. Result has 297 places, 380 transitions, 5762 flow [2024-06-14 14:06:28,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5762, PETRI_PLACES=297, PETRI_TRANSITIONS=380} [2024-06-14 14:06:28,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-14 14:06:28,186 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 380 transitions, 5762 flow [2024-06-14 14:06:28,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:28,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:28,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:28,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 14:06:28,187 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:28,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:28,187 INFO L85 PathProgramCache]: Analyzing trace with hash 117564751, now seen corresponding path program 12 times [2024-06-14 14:06:28,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:28,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925742063] [2024-06-14 14:06:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:28,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:28,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:28,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925742063] [2024-06-14 14:06:28,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925742063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:28,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:28,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:28,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749056100] [2024-06-14 14:06:28,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:28,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:28,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:28,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:28,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:28,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 380 transitions, 5762 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:28,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:28,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:28,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:29,300 INFO L124 PetriNetUnfolderBase]: 2222/3740 cut-off events. [2024-06-14 14:06:29,300 INFO L125 PetriNetUnfolderBase]: For 281671/281671 co-relation queries the response was YES. [2024-06-14 14:06:29,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27058 conditions, 3740 events. 2222/3740 cut-off events. For 281671/281671 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 23247 event pairs, 419 based on Foata normal form. 2/3741 useless extension candidates. Maximal degree in co-relation 26928. Up to 3347 conditions per place. [2024-06-14 14:06:29,346 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 71 changer transitions 0/414 dead transitions. [2024-06-14 14:06:29,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 414 transitions, 7029 flow [2024-06-14 14:06:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-14 14:06:29,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49667405764966743 [2024-06-14 14:06:29,347 INFO L175 Difference]: Start difference. First operand has 297 places, 380 transitions, 5762 flow. Second operand 11 states and 224 transitions. [2024-06-14 14:06:29,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 414 transitions, 7029 flow [2024-06-14 14:06:30,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 414 transitions, 6877 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:30,211 INFO L231 Difference]: Finished difference. Result has 304 places, 392 transitions, 6009 flow [2024-06-14 14:06:30,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6009, PETRI_PLACES=304, PETRI_TRANSITIONS=392} [2024-06-14 14:06:30,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 14:06:30,212 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 392 transitions, 6009 flow [2024-06-14 14:06:30,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:30,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:30,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:30,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 14:06:30,213 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:30,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:30,213 INFO L85 PathProgramCache]: Analyzing trace with hash -938278935, now seen corresponding path program 9 times [2024-06-14 14:06:30,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:30,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999670159] [2024-06-14 14:06:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:30,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:30,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999670159] [2024-06-14 14:06:30,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999670159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:30,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:30,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:30,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812069602] [2024-06-14 14:06:30,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:30,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:30,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:30,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:30,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 392 transitions, 6009 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:30,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:30,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:30,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:31,199 INFO L124 PetriNetUnfolderBase]: 2219/3739 cut-off events. [2024-06-14 14:06:31,200 INFO L125 PetriNetUnfolderBase]: For 284415/284418 co-relation queries the response was YES. [2024-06-14 14:06:31,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27024 conditions, 3739 events. 2219/3739 cut-off events. For 284415/284418 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 23316 event pairs, 463 based on Foata normal form. 3/3734 useless extension candidates. Maximal degree in co-relation 26893. Up to 3175 conditions per place. [2024-06-14 14:06:31,250 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 335 selfloop transitions, 70 changer transitions 0/411 dead transitions. [2024-06-14 14:06:31,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 411 transitions, 6867 flow [2024-06-14 14:06:31,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:31,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 14:06:31,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 14:06:31,251 INFO L175 Difference]: Start difference. First operand has 304 places, 392 transitions, 6009 flow. Second operand 6 states and 143 transitions. [2024-06-14 14:06:31,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 411 transitions, 6867 flow [2024-06-14 14:06:32,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 411 transitions, 6653 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:32,092 INFO L231 Difference]: Finished difference. Result has 302 places, 392 transitions, 5946 flow [2024-06-14 14:06:32,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5795, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5946, PETRI_PLACES=302, PETRI_TRANSITIONS=392} [2024-06-14 14:06:32,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-14 14:06:32,093 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 392 transitions, 5946 flow [2024-06-14 14:06:32,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:32,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:32,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:32,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 14:06:32,094 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:32,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:32,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1013798475, now seen corresponding path program 13 times [2024-06-14 14:06:32,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:32,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031960706] [2024-06-14 14:06:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:32,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:32,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:32,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031960706] [2024-06-14 14:06:32,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031960706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:32,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:32,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:32,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947242743] [2024-06-14 14:06:32,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:32,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:32,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:32,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:32,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:32,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:32,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 392 transitions, 5946 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:32,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:32,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:32,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:33,149 INFO L124 PetriNetUnfolderBase]: 2221/3735 cut-off events. [2024-06-14 14:06:33,149 INFO L125 PetriNetUnfolderBase]: For 290330/290330 co-relation queries the response was YES. [2024-06-14 14:06:33,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27086 conditions, 3735 events. 2221/3735 cut-off events. For 290330/290330 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 23184 event pairs, 448 based on Foata normal form. 2/3732 useless extension candidates. Maximal degree in co-relation 26954. Up to 3037 conditions per place. [2024-06-14 14:06:33,190 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 197 changer transitions 0/417 dead transitions. [2024-06-14 14:06:33,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 417 transitions, 7203 flow [2024-06-14 14:06:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:06:33,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 14:06:33,191 INFO L175 Difference]: Start difference. First operand has 302 places, 392 transitions, 5946 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:06:33,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 417 transitions, 7203 flow [2024-06-14 14:06:33,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 417 transitions, 7062 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:33,984 INFO L231 Difference]: Finished difference. Result has 304 places, 395 transitions, 6281 flow [2024-06-14 14:06:33,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6281, PETRI_PLACES=304, PETRI_TRANSITIONS=395} [2024-06-14 14:06:33,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 14:06:33,985 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 395 transitions, 6281 flow [2024-06-14 14:06:33,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:33,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:33,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 14:06:33,986 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:33,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash 112202371, now seen corresponding path program 14 times [2024-06-14 14:06:33,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:33,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134662440] [2024-06-14 14:06:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:33,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:34,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:34,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134662440] [2024-06-14 14:06:34,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134662440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:34,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:34,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:34,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657584050] [2024-06-14 14:06:34,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:34,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:34,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:34,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:34,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:34,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 395 transitions, 6281 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:34,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:34,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:34,988 INFO L124 PetriNetUnfolderBase]: 2215/3733 cut-off events. [2024-06-14 14:06:34,988 INFO L125 PetriNetUnfolderBase]: For 284288/284288 co-relation queries the response was YES. [2024-06-14 14:06:35,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27167 conditions, 3733 events. 2215/3733 cut-off events. For 284288/284288 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 23257 event pairs, 419 based on Foata normal form. 2/3734 useless extension candidates. Maximal degree in co-relation 27035. Up to 3358 conditions per place. [2024-06-14 14:06:35,032 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 52 changer transitions 0/412 dead transitions. [2024-06-14 14:06:35,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 412 transitions, 7135 flow [2024-06-14 14:06:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:35,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 14:06:35,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 14:06:35,033 INFO L175 Difference]: Start difference. First operand has 304 places, 395 transitions, 6281 flow. Second operand 7 states and 154 transitions. [2024-06-14 14:06:35,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 412 transitions, 7135 flow [2024-06-14 14:06:36,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 412 transitions, 6577 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:36,144 INFO L231 Difference]: Finished difference. Result has 306 places, 395 transitions, 5837 flow [2024-06-14 14:06:36,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5723, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5837, PETRI_PLACES=306, PETRI_TRANSITIONS=395} [2024-06-14 14:06:36,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-14 14:06:36,145 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 395 transitions, 5837 flow [2024-06-14 14:06:36,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:36,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:36,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 14:06:36,145 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:36,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash -807350927, now seen corresponding path program 15 times [2024-06-14 14:06:36,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:36,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238468121] [2024-06-14 14:06:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:36,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:36,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:36,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238468121] [2024-06-14 14:06:36,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238468121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:36,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:36,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:36,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867098409] [2024-06-14 14:06:36,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:36,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:36,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:36,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:36,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 395 transitions, 5837 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:36,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:36,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:37,234 INFO L124 PetriNetUnfolderBase]: 2272/3830 cut-off events. [2024-06-14 14:06:37,234 INFO L125 PetriNetUnfolderBase]: For 287054/287057 co-relation queries the response was YES. [2024-06-14 14:06:37,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27282 conditions, 3830 events. 2272/3830 cut-off events. For 287054/287057 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23995 event pairs, 428 based on Foata normal form. 4/3832 useless extension candidates. Maximal degree in co-relation 27150. Up to 3159 conditions per place. [2024-06-14 14:06:37,281 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 136 changer transitions 0/452 dead transitions. [2024-06-14 14:06:37,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 452 transitions, 7542 flow [2024-06-14 14:06:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:06:37,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-14 14:06:37,282 INFO L175 Difference]: Start difference. First operand has 306 places, 395 transitions, 5837 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:06:37,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 452 transitions, 7542 flow [2024-06-14 14:06:38,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 452 transitions, 7404 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:38,253 INFO L231 Difference]: Finished difference. Result has 309 places, 420 transitions, 6624 flow [2024-06-14 14:06:38,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5699, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6624, PETRI_PLACES=309, PETRI_TRANSITIONS=420} [2024-06-14 14:06:38,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-14 14:06:38,253 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 420 transitions, 6624 flow [2024-06-14 14:06:38,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:38,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:38,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 14:06:38,254 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:38,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:38,254 INFO L85 PathProgramCache]: Analyzing trace with hash -800684687, now seen corresponding path program 16 times [2024-06-14 14:06:38,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:38,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708614211] [2024-06-14 14:06:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:38,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:38,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:38,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708614211] [2024-06-14 14:06:38,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708614211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:38,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:38,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:38,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189282767] [2024-06-14 14:06:38,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:38,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:38,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:38,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:38,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:38,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:38,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 420 transitions, 6624 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:38,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:38,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:39,345 INFO L124 PetriNetUnfolderBase]: 2269/3825 cut-off events. [2024-06-14 14:06:39,346 INFO L125 PetriNetUnfolderBase]: For 288715/288715 co-relation queries the response was YES. [2024-06-14 14:06:39,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27864 conditions, 3825 events. 2269/3825 cut-off events. For 288715/288715 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23936 event pairs, 419 based on Foata normal form. 1/3825 useless extension candidates. Maximal degree in co-relation 27729. Up to 3157 conditions per place. [2024-06-14 14:06:39,392 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 165 changer transitions 0/461 dead transitions. [2024-06-14 14:06:39,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 461 transitions, 8056 flow [2024-06-14 14:06:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-14 14:06:39,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-14 14:06:39,394 INFO L175 Difference]: Start difference. First operand has 309 places, 420 transitions, 6624 flow. Second operand 9 states and 218 transitions. [2024-06-14 14:06:39,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 461 transitions, 8056 flow [2024-06-14 14:06:40,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 461 transitions, 7813 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:40,539 INFO L231 Difference]: Finished difference. Result has 315 places, 423 transitions, 6907 flow [2024-06-14 14:06:40,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6381, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6907, PETRI_PLACES=315, PETRI_TRANSITIONS=423} [2024-06-14 14:06:40,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-14 14:06:40,540 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 423 transitions, 6907 flow [2024-06-14 14:06:40,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:40,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:40,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 14:06:40,541 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:40,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1448084797, now seen corresponding path program 17 times [2024-06-14 14:06:40,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:40,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849424498] [2024-06-14 14:06:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:40,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:40,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:40,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849424498] [2024-06-14 14:06:40,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849424498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:40,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:40,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:40,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144196448] [2024-06-14 14:06:40,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:40,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:40,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:40,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:40,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:40,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:40,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 423 transitions, 6907 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:40,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:40,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:41,660 INFO L124 PetriNetUnfolderBase]: 2266/3821 cut-off events. [2024-06-14 14:06:41,660 INFO L125 PetriNetUnfolderBase]: For 292722/292722 co-relation queries the response was YES. [2024-06-14 14:06:41,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28137 conditions, 3821 events. 2266/3821 cut-off events. For 292722/292722 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23952 event pairs, 419 based on Foata normal form. 1/3821 useless extension candidates. Maximal degree in co-relation 27999. Up to 3155 conditions per place. [2024-06-14 14:06:41,707 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 162 changer transitions 0/460 dead transitions. [2024-06-14 14:06:41,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 460 transitions, 8099 flow [2024-06-14 14:06:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-14 14:06:41,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-14 14:06:41,708 INFO L175 Difference]: Start difference. First operand has 315 places, 423 transitions, 6907 flow. Second operand 9 states and 218 transitions. [2024-06-14 14:06:41,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 460 transitions, 8099 flow [2024-06-14 14:06:42,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 460 transitions, 7849 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:42,823 INFO L231 Difference]: Finished difference. Result has 316 places, 423 transitions, 7012 flow [2024-06-14 14:06:42,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6663, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7012, PETRI_PLACES=316, PETRI_TRANSITIONS=423} [2024-06-14 14:06:42,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-14 14:06:42,823 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 423 transitions, 7012 flow [2024-06-14 14:06:42,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:42,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:42,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:42,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 14:06:42,824 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:42,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:42,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1166082957, now seen corresponding path program 2 times [2024-06-14 14:06:42,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:42,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346203236] [2024-06-14 14:06:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:42,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:43,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:43,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346203236] [2024-06-14 14:06:43,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346203236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:43,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:43,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:43,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640792704] [2024-06-14 14:06:43,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:43,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:43,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:43,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:43,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:43,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:43,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 423 transitions, 7012 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:43,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:43,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:43,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:43,934 INFO L124 PetriNetUnfolderBase]: 2372/3998 cut-off events. [2024-06-14 14:06:43,934 INFO L125 PetriNetUnfolderBase]: For 349044/349047 co-relation queries the response was YES. [2024-06-14 14:06:43,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30001 conditions, 3998 events. 2372/3998 cut-off events. For 349044/349047 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25084 event pairs, 341 based on Foata normal form. 14/4010 useless extension candidates. Maximal degree in co-relation 29865. Up to 3111 conditions per place. [2024-06-14 14:06:43,983 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 375 selfloop transitions, 73 changer transitions 0/454 dead transitions. [2024-06-14 14:06:43,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 454 transitions, 8266 flow [2024-06-14 14:06:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:43,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 14:06:43,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 14:06:43,984 INFO L175 Difference]: Start difference. First operand has 316 places, 423 transitions, 7012 flow. Second operand 6 states and 150 transitions. [2024-06-14 14:06:43,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 454 transitions, 8266 flow [2024-06-14 14:06:44,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 454 transitions, 7857 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:44,996 INFO L231 Difference]: Finished difference. Result has 314 places, 427 transitions, 6896 flow [2024-06-14 14:06:44,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6605, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6896, PETRI_PLACES=314, PETRI_TRANSITIONS=427} [2024-06-14 14:06:44,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-14 14:06:44,997 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 427 transitions, 6896 flow [2024-06-14 14:06:44,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:44,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:44,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:44,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 14:06:44,998 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:44,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:44,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2041080969, now seen corresponding path program 3 times [2024-06-14 14:06:44,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:44,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483488984] [2024-06-14 14:06:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:44,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:45,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:45,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483488984] [2024-06-14 14:06:45,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483488984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:45,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:45,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:45,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210325151] [2024-06-14 14:06:45,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:45,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:45,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:45,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:45,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:45,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:45,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 427 transitions, 6896 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:45,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:45,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:45,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:46,096 INFO L124 PetriNetUnfolderBase]: 2406/4056 cut-off events. [2024-06-14 14:06:46,096 INFO L125 PetriNetUnfolderBase]: For 341111/341114 co-relation queries the response was YES. [2024-06-14 14:06:46,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30244 conditions, 4056 events. 2406/4056 cut-off events. For 341111/341114 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25453 event pairs, 324 based on Foata normal form. 14/4068 useless extension candidates. Maximal degree in co-relation 30106. Up to 3008 conditions per place. [2024-06-14 14:06:46,146 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 374 selfloop transitions, 82 changer transitions 0/462 dead transitions. [2024-06-14 14:06:46,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 462 transitions, 8324 flow [2024-06-14 14:06:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:06:46,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 14:06:46,147 INFO L175 Difference]: Start difference. First operand has 314 places, 427 transitions, 6896 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:06:46,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 462 transitions, 8324 flow [2024-06-14 14:06:47,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 462 transitions, 8207 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:47,223 INFO L231 Difference]: Finished difference. Result has 320 places, 430 transitions, 7045 flow [2024-06-14 14:06:47,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6779, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7045, PETRI_PLACES=320, PETRI_TRANSITIONS=430} [2024-06-14 14:06:47,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 14:06:47,223 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 430 transitions, 7045 flow [2024-06-14 14:06:47,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:47,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:47,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:47,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 14:06:47,224 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:47,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:47,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1007796255, now seen corresponding path program 1 times [2024-06-14 14:06:47,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:47,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399262549] [2024-06-14 14:06:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:47,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:47,627 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 14:06:47,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:47,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399262549] [2024-06-14 14:06:47,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399262549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:47,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:47,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:47,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666715811] [2024-06-14 14:06:47,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:47,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:47,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:47,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:47,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:47,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 430 transitions, 7045 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:47,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:47,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:47,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:48,454 INFO L124 PetriNetUnfolderBase]: 2454/4141 cut-off events. [2024-06-14 14:06:48,454 INFO L125 PetriNetUnfolderBase]: For 330585/330585 co-relation queries the response was YES. [2024-06-14 14:06:48,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30943 conditions, 4141 events. 2454/4141 cut-off events. For 330585/330585 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 26241 event pairs, 471 based on Foata normal form. 6/4146 useless extension candidates. Maximal degree in co-relation 30802. Up to 3660 conditions per place. [2024-06-14 14:06:48,510 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 401 selfloop transitions, 51 changer transitions 0/458 dead transitions. [2024-06-14 14:06:48,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 458 transitions, 8076 flow [2024-06-14 14:06:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 14:06:48,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 14:06:48,511 INFO L175 Difference]: Start difference. First operand has 320 places, 430 transitions, 7045 flow. Second operand 9 states and 192 transitions. [2024-06-14 14:06:48,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 458 transitions, 8076 flow [2024-06-14 14:06:49,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 458 transitions, 7859 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:49,807 INFO L231 Difference]: Finished difference. Result has 326 places, 432 transitions, 6986 flow [2024-06-14 14:06:49,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6986, PETRI_PLACES=326, PETRI_TRANSITIONS=432} [2024-06-14 14:06:49,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-14 14:06:49,807 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 432 transitions, 6986 flow [2024-06-14 14:06:49,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:49,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:49,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:49,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 14:06:49,808 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:49,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:49,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2032068897, now seen corresponding path program 2 times [2024-06-14 14:06:49,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:49,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416178183] [2024-06-14 14:06:49,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:49,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:50,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:50,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416178183] [2024-06-14 14:06:50,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416178183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:50,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:50,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:50,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079050178] [2024-06-14 14:06:50,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:50,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:50,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:50,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:50,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:50,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:50,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 432 transitions, 6986 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:50,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:50,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:50,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:51,073 INFO L124 PetriNetUnfolderBase]: 2474/4172 cut-off events. [2024-06-14 14:06:51,073 INFO L125 PetriNetUnfolderBase]: For 339214/339214 co-relation queries the response was YES. [2024-06-14 14:06:51,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30695 conditions, 4172 events. 2474/4172 cut-off events. For 339214/339214 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26475 event pairs, 443 based on Foata normal form. 6/4177 useless extension candidates. Maximal degree in co-relation 30552. Up to 3600 conditions per place. [2024-06-14 14:06:51,129 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 400 selfloop transitions, 55 changer transitions 0/461 dead transitions. [2024-06-14 14:06:51,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 461 transitions, 8024 flow [2024-06-14 14:06:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 14:06:51,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 14:06:51,130 INFO L175 Difference]: Start difference. First operand has 326 places, 432 transitions, 6986 flow. Second operand 7 states and 163 transitions. [2024-06-14 14:06:51,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 461 transitions, 8024 flow [2024-06-14 14:06:52,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 461 transitions, 7919 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:52,376 INFO L231 Difference]: Finished difference. Result has 327 places, 433 transitions, 7021 flow [2024-06-14 14:06:52,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6881, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7021, PETRI_PLACES=327, PETRI_TRANSITIONS=433} [2024-06-14 14:06:52,377 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-14 14:06:52,377 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 433 transitions, 7021 flow [2024-06-14 14:06:52,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:52,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:52,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:52,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 14:06:52,378 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:52,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:52,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2041265667, now seen corresponding path program 3 times [2024-06-14 14:06:52,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:52,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672239001] [2024-06-14 14:06:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:52,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:52,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:52,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672239001] [2024-06-14 14:06:52,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672239001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:52,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:52,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:52,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603057827] [2024-06-14 14:06:52,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:52,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:52,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:52,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:52,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:52,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:52,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 433 transitions, 7021 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:52,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:52,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:52,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:53,635 INFO L124 PetriNetUnfolderBase]: 2461/4152 cut-off events. [2024-06-14 14:06:53,635 INFO L125 PetriNetUnfolderBase]: For 319963/319966 co-relation queries the response was YES. [2024-06-14 14:06:53,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30107 conditions, 4152 events. 2461/4152 cut-off events. For 319963/319966 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26369 event pairs, 422 based on Foata normal form. 8/4158 useless extension candidates. Maximal degree in co-relation 29963. Up to 3543 conditions per place. [2024-06-14 14:06:53,677 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 398 selfloop transitions, 55 changer transitions 0/459 dead transitions. [2024-06-14 14:06:53,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 459 transitions, 8027 flow [2024-06-14 14:06:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 14:06:53,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 14:06:53,678 INFO L175 Difference]: Start difference. First operand has 327 places, 433 transitions, 7021 flow. Second operand 7 states and 160 transitions. [2024-06-14 14:06:53,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 459 transitions, 8027 flow [2024-06-14 14:06:54,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 459 transitions, 7903 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:54,790 INFO L231 Difference]: Finished difference. Result has 329 places, 433 transitions, 7011 flow [2024-06-14 14:06:54,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6897, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7011, PETRI_PLACES=329, PETRI_TRANSITIONS=433} [2024-06-14 14:06:54,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-14 14:06:54,791 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 433 transitions, 7011 flow [2024-06-14 14:06:54,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:54,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:54,791 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, 1] [2024-06-14 14:06:54,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 14:06:54,791 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:54,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1153588444, now seen corresponding path program 1 times [2024-06-14 14:06:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:54,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219551113] [2024-06-14 14:06:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:54,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:55,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:55,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219551113] [2024-06-14 14:06:55,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219551113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:55,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:55,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:55,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924859219] [2024-06-14 14:06:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:55,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:55,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:55,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:55,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:55,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:55,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 433 transitions, 7011 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:55,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:55,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:55,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:56,010 INFO L124 PetriNetUnfolderBase]: 2556/4294 cut-off events. [2024-06-14 14:06:56,010 INFO L125 PetriNetUnfolderBase]: For 367783/367783 co-relation queries the response was YES. [2024-06-14 14:06:56,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31640 conditions, 4294 events. 2556/4294 cut-off events. For 367783/367783 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 27417 event pairs, 484 based on Foata normal form. 10/4296 useless extension candidates. Maximal degree in co-relation 31495. Up to 3390 conditions per place. [2024-06-14 14:06:56,066 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 332 selfloop transitions, 139 changer transitions 0/477 dead transitions. [2024-06-14 14:06:56,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 477 transitions, 8353 flow [2024-06-14 14:06:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:06:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:06:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-14 14:06:56,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 14:06:56,068 INFO L175 Difference]: Start difference. First operand has 329 places, 433 transitions, 7011 flow. Second operand 12 states and 264 transitions. [2024-06-14 14:06:56,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 477 transitions, 8353 flow [2024-06-14 14:06:57,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 477 transitions, 8200 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:57,347 INFO L231 Difference]: Finished difference. Result has 335 places, 437 transitions, 7249 flow [2024-06-14 14:06:57,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7249, PETRI_PLACES=335, PETRI_TRANSITIONS=437} [2024-06-14 14:06:57,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-14 14:06:57,348 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 437 transitions, 7249 flow [2024-06-14 14:06:57,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:57,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:57,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:57,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 14:06:57,349 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:57,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:57,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1150731484, now seen corresponding path program 2 times [2024-06-14 14:06:57,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:57,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105161745] [2024-06-14 14:06:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:57,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:57,709 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 14:06:57,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:57,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105161745] [2024-06-14 14:06:57,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105161745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:57,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:57,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:57,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636327784] [2024-06-14 14:06:57,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:57,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:57,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:57,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:57,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:57,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 437 transitions, 7249 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:57,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:57,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:57,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:58,626 INFO L124 PetriNetUnfolderBase]: 2592/4363 cut-off events. [2024-06-14 14:06:58,627 INFO L125 PetriNetUnfolderBase]: For 377700/377700 co-relation queries the response was YES. [2024-06-14 14:06:58,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32229 conditions, 4363 events. 2592/4363 cut-off events. For 377700/377700 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27941 event pairs, 517 based on Foata normal form. 10/4369 useless extension candidates. Maximal degree in co-relation 32084. Up to 3647 conditions per place. [2024-06-14 14:06:58,678 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 330 selfloop transitions, 135 changer transitions 0/471 dead transitions. [2024-06-14 14:06:58,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 471 transitions, 8331 flow [2024-06-14 14:06:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:06:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:06:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-14 14:06:58,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223577235772358 [2024-06-14 14:06:58,680 INFO L175 Difference]: Start difference. First operand has 335 places, 437 transitions, 7249 flow. Second operand 12 states and 257 transitions. [2024-06-14 14:06:58,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 471 transitions, 8331 flow [2024-06-14 14:07:00,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 471 transitions, 8087 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:00,048 INFO L231 Difference]: Finished difference. Result has 340 places, 439 transitions, 7341 flow [2024-06-14 14:07:00,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7025, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7341, PETRI_PLACES=340, PETRI_TRANSITIONS=439} [2024-06-14 14:07:00,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-14 14:07:00,048 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 439 transitions, 7341 flow [2024-06-14 14:07:00,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:00,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:00,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:00,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 14:07:00,049 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:00,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1035440314, now seen corresponding path program 3 times [2024-06-14 14:07:00,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:00,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288152729] [2024-06-14 14:07:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:00,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:00,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:00,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288152729] [2024-06-14 14:07:00,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288152729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:00,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:00,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:00,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227713455] [2024-06-14 14:07:00,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:00,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:00,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:00,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:00,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:00,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 439 transitions, 7341 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:00,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:00,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:00,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:01,329 INFO L124 PetriNetUnfolderBase]: 2569/4322 cut-off events. [2024-06-14 14:07:01,329 INFO L125 PetriNetUnfolderBase]: For 342702/342705 co-relation queries the response was YES. [2024-06-14 14:07:01,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31349 conditions, 4322 events. 2569/4322 cut-off events. For 342702/342705 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 27688 event pairs, 484 based on Foata normal form. 12/4332 useless extension candidates. Maximal degree in co-relation 31202. Up to 3635 conditions per place. [2024-06-14 14:07:01,385 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 65 changer transitions 0/469 dead transitions. [2024-06-14 14:07:01,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 469 transitions, 8361 flow [2024-06-14 14:07:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:07:01,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 14:07:01,386 INFO L175 Difference]: Start difference. First operand has 340 places, 439 transitions, 7341 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:07:01,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 469 transitions, 8361 flow [2024-06-14 14:07:02,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 469 transitions, 8049 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:02,947 INFO L231 Difference]: Finished difference. Result has 337 places, 439 transitions, 7173 flow [2024-06-14 14:07:02,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7029, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7173, PETRI_PLACES=337, PETRI_TRANSITIONS=439} [2024-06-14 14:07:02,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-14 14:07:02,947 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 439 transitions, 7173 flow [2024-06-14 14:07:02,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:02,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:02,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:02,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 14:07:02,948 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:02,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1326226297, now seen corresponding path program 1 times [2024-06-14 14:07:02,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:02,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377031603] [2024-06-14 14:07:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:02,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:03,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377031603] [2024-06-14 14:07:03,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377031603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:03,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:03,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:03,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901254997] [2024-06-14 14:07:03,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:03,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:03,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:03,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:03,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:03,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:03,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 439 transitions, 7173 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:03,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:03,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:03,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:04,085 INFO L124 PetriNetUnfolderBase]: 2590/4365 cut-off events. [2024-06-14 14:07:04,085 INFO L125 PetriNetUnfolderBase]: For 325130/325130 co-relation queries the response was YES. [2024-06-14 14:07:04,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31570 conditions, 4365 events. 2590/4365 cut-off events. For 325130/325130 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 27998 event pairs, 508 based on Foata normal form. 1/4362 useless extension candidates. Maximal degree in co-relation 31422. Up to 3367 conditions per place. [2024-06-14 14:07:04,142 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 280 changer transitions 0/481 dead transitions. [2024-06-14 14:07:04,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 481 transitions, 8648 flow [2024-06-14 14:07:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-14 14:07:04,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-14 14:07:04,143 INFO L175 Difference]: Start difference. First operand has 337 places, 439 transitions, 7173 flow. Second operand 12 states and 262 transitions. [2024-06-14 14:07:04,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 481 transitions, 8648 flow [2024-06-14 14:07:05,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 481 transitions, 8510 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:05,669 INFO L231 Difference]: Finished difference. Result has 343 places, 448 transitions, 7714 flow [2024-06-14 14:07:05,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7035, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7714, PETRI_PLACES=343, PETRI_TRANSITIONS=448} [2024-06-14 14:07:05,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-14 14:07:05,670 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 448 transitions, 7714 flow [2024-06-14 14:07:05,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:05,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:05,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:05,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 14:07:05,670 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:05,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:05,670 INFO L85 PathProgramCache]: Analyzing trace with hash -377261095, now seen corresponding path program 2 times [2024-06-14 14:07:05,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:05,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362487526] [2024-06-14 14:07:05,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:05,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:05,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362487526] [2024-06-14 14:07:05,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362487526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:05,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:05,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:05,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500830] [2024-06-14 14:07:05,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:05,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:05,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:06,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:06,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 448 transitions, 7714 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:06,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:06,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:06,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:06,900 INFO L124 PetriNetUnfolderBase]: 2603/4384 cut-off events. [2024-06-14 14:07:06,900 INFO L125 PetriNetUnfolderBase]: For 337088/337091 co-relation queries the response was YES. [2024-06-14 14:07:06,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32278 conditions, 4384 events. 2603/4384 cut-off events. For 337088/337091 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28134 event pairs, 519 based on Foata normal form. 3/4385 useless extension candidates. Maximal degree in co-relation 32129. Up to 3743 conditions per place. [2024-06-14 14:07:06,958 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 358 selfloop transitions, 120 changer transitions 0/484 dead transitions. [2024-06-14 14:07:06,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 484 transitions, 9154 flow [2024-06-14 14:07:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 14:07:06,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-14 14:07:06,961 INFO L175 Difference]: Start difference. First operand has 343 places, 448 transitions, 7714 flow. Second operand 9 states and 206 transitions. [2024-06-14 14:07:06,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 484 transitions, 9154 flow [2024-06-14 14:07:08,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 484 transitions, 8850 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:08,346 INFO L231 Difference]: Finished difference. Result has 346 places, 454 transitions, 7730 flow [2024-06-14 14:07:08,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7424, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7730, PETRI_PLACES=346, PETRI_TRANSITIONS=454} [2024-06-14 14:07:08,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 14:07:08,347 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 454 transitions, 7730 flow [2024-06-14 14:07:08,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:08,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:08,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:08,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 14:07:08,348 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:08,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:08,348 INFO L85 PathProgramCache]: Analyzing trace with hash -377266675, now seen corresponding path program 3 times [2024-06-14 14:07:08,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:08,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496858934] [2024-06-14 14:07:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:08,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:08,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:08,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496858934] [2024-06-14 14:07:08,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496858934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:08,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:08,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:08,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193270783] [2024-06-14 14:07:08,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:08,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:08,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:08,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:08,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 454 transitions, 7730 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:08,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:08,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:08,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:09,576 INFO L124 PetriNetUnfolderBase]: 2600/4384 cut-off events. [2024-06-14 14:07:09,576 INFO L125 PetriNetUnfolderBase]: For 339866/339869 co-relation queries the response was YES. [2024-06-14 14:07:09,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32040 conditions, 4384 events. 2600/4384 cut-off events. For 339866/339869 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28138 event pairs, 521 based on Foata normal form. 3/4385 useless extension candidates. Maximal degree in co-relation 31890. Up to 3740 conditions per place. [2024-06-14 14:07:09,639 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 357 selfloop transitions, 118 changer transitions 0/481 dead transitions. [2024-06-14 14:07:09,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 481 transitions, 8918 flow [2024-06-14 14:07:09,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:07:09,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 14:07:09,640 INFO L175 Difference]: Start difference. First operand has 346 places, 454 transitions, 7730 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:07:09,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 481 transitions, 8918 flow [2024-06-14 14:07:11,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 481 transitions, 8665 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:11,255 INFO L231 Difference]: Finished difference. Result has 347 places, 454 transitions, 7720 flow [2024-06-14 14:07:11,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7477, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7720, PETRI_PLACES=347, PETRI_TRANSITIONS=454} [2024-06-14 14:07:11,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 14:07:11,256 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 454 transitions, 7720 flow [2024-06-14 14:07:11,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:11,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:11,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:11,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 14:07:11,257 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:11,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:11,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1159992517, now seen corresponding path program 4 times [2024-06-14 14:07:11,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:11,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81935497] [2024-06-14 14:07:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:11,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:11,547 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 14:07:11,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:11,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81935497] [2024-06-14 14:07:11,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81935497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:11,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:11,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:11,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190123837] [2024-06-14 14:07:11,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:11,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:11,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:11,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:11,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 454 transitions, 7720 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:11,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:11,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:11,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:12,375 INFO L124 PetriNetUnfolderBase]: 2613/4405 cut-off events. [2024-06-14 14:07:12,375 INFO L125 PetriNetUnfolderBase]: For 351737/351737 co-relation queries the response was YES. [2024-06-14 14:07:12,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32199 conditions, 4405 events. 2613/4405 cut-off events. For 351737/351737 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28326 event pairs, 518 based on Foata normal form. 1/4402 useless extension candidates. Maximal degree in co-relation 32049. Up to 3394 conditions per place. [2024-06-14 14:07:12,435 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 218 selfloop transitions, 267 changer transitions 0/491 dead transitions. [2024-06-14 14:07:12,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 491 transitions, 9372 flow [2024-06-14 14:07:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:12,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-14 14:07:12,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 14:07:12,437 INFO L175 Difference]: Start difference. First operand has 347 places, 454 transitions, 7720 flow. Second operand 12 states and 258 transitions. [2024-06-14 14:07:12,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 491 transitions, 9372 flow [2024-06-14 14:07:14,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 491 transitions, 9136 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:14,056 INFO L231 Difference]: Finished difference. Result has 353 places, 460 transitions, 8116 flow [2024-06-14 14:07:14,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7484, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8116, PETRI_PLACES=353, PETRI_TRANSITIONS=460} [2024-06-14 14:07:14,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-14 14:07:14,056 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 460 transitions, 8116 flow [2024-06-14 14:07:14,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:14,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:14,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:14,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 14:07:14,057 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:14,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:14,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1150726927, now seen corresponding path program 5 times [2024-06-14 14:07:14,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:14,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631136076] [2024-06-14 14:07:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:14,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:14,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:14,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631136076] [2024-06-14 14:07:14,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631136076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:14,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:14,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:14,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154825426] [2024-06-14 14:07:14,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:14,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:14,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:14,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:14,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:14,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:14,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 460 transitions, 8116 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:14,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:14,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:14,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:15,324 INFO L124 PetriNetUnfolderBase]: 2618/4410 cut-off events. [2024-06-14 14:07:15,324 INFO L125 PetriNetUnfolderBase]: For 361281/361281 co-relation queries the response was YES. [2024-06-14 14:07:15,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32719 conditions, 4410 events. 2618/4410 cut-off events. For 361281/361281 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28358 event pairs, 516 based on Foata normal form. 1/4407 useless extension candidates. Maximal degree in co-relation 32568. Up to 3400 conditions per place. [2024-06-14 14:07:15,372 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 251 changer transitions 0/490 dead transitions. [2024-06-14 14:07:15,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 490 transitions, 9722 flow [2024-06-14 14:07:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 14:07:15,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-14 14:07:15,373 INFO L175 Difference]: Start difference. First operand has 353 places, 460 transitions, 8116 flow. Second operand 11 states and 239 transitions. [2024-06-14 14:07:15,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 490 transitions, 9722 flow [2024-06-14 14:07:17,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 490 transitions, 9403 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:17,099 INFO L231 Difference]: Finished difference. Result has 357 places, 463 transitions, 8358 flow [2024-06-14 14:07:17,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8358, PETRI_PLACES=357, PETRI_TRANSITIONS=463} [2024-06-14 14:07:17,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-14 14:07:17,099 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 463 transitions, 8358 flow [2024-06-14 14:07:17,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:17,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:17,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:17,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 14:07:17,100 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:17,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:17,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1150738087, now seen corresponding path program 6 times [2024-06-14 14:07:17,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:17,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809646464] [2024-06-14 14:07:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:17,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:17,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:17,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809646464] [2024-06-14 14:07:17,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809646464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:17,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:17,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:17,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577304036] [2024-06-14 14:07:17,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:17,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:17,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:17,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:17,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:17,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:17,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 463 transitions, 8358 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:17,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:17,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:17,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:18,295 INFO L124 PetriNetUnfolderBase]: 2615/4406 cut-off events. [2024-06-14 14:07:18,295 INFO L125 PetriNetUnfolderBase]: For 366790/366790 co-relation queries the response was YES. [2024-06-14 14:07:18,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32765 conditions, 4406 events. 2615/4406 cut-off events. For 366790/366790 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28326 event pairs, 516 based on Foata normal form. 1/4403 useless extension candidates. Maximal degree in co-relation 32613. Up to 3397 conditions per place. [2024-06-14 14:07:18,351 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 234 selfloop transitions, 249 changer transitions 0/489 dead transitions. [2024-06-14 14:07:18,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 489 transitions, 9738 flow [2024-06-14 14:07:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 14:07:18,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-14 14:07:18,352 INFO L175 Difference]: Start difference. First operand has 357 places, 463 transitions, 8358 flow. Second operand 11 states and 239 transitions. [2024-06-14 14:07:18,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 489 transitions, 9738 flow [2024-06-14 14:07:20,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 489 transitions, 9426 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:20,272 INFO L231 Difference]: Finished difference. Result has 363 places, 463 transitions, 8550 flow [2024-06-14 14:07:20,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8046, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8550, PETRI_PLACES=363, PETRI_TRANSITIONS=463} [2024-06-14 14:07:20,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-14 14:07:20,273 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 463 transitions, 8550 flow [2024-06-14 14:07:20,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:20,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:20,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:20,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 14:07:20,274 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:20,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:20,274 INFO L85 PathProgramCache]: Analyzing trace with hash 395849542, now seen corresponding path program 1 times [2024-06-14 14:07:20,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:20,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251207188] [2024-06-14 14:07:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:20,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:20,660 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 14:07:20,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:20,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251207188] [2024-06-14 14:07:20,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251207188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:20,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:20,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:20,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082376461] [2024-06-14 14:07:20,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:20,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:20,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:20,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:20,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:20,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:20,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 463 transitions, 8550 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:20,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:20,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:20,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:21,493 INFO L124 PetriNetUnfolderBase]: 2651/4465 cut-off events. [2024-06-14 14:07:21,493 INFO L125 PetriNetUnfolderBase]: For 413707/413710 co-relation queries the response was YES. [2024-06-14 14:07:21,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33337 conditions, 4465 events. 2651/4465 cut-off events. For 413707/413710 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28766 event pairs, 525 based on Foata normal form. 12/4475 useless extension candidates. Maximal degree in co-relation 33184. Up to 3804 conditions per place. [2024-06-14 14:07:21,551 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 390 selfloop transitions, 93 changer transitions 0/489 dead transitions. [2024-06-14 14:07:21,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 489 transitions, 9645 flow [2024-06-14 14:07:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 14:07:21,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 14:07:21,552 INFO L175 Difference]: Start difference. First operand has 363 places, 463 transitions, 8550 flow. Second operand 7 states and 165 transitions. [2024-06-14 14:07:21,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 489 transitions, 9645 flow [2024-06-14 14:07:23,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 489 transitions, 9130 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:23,223 INFO L231 Difference]: Finished difference. Result has 360 places, 465 transitions, 8282 flow [2024-06-14 14:07:23,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8035, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8282, PETRI_PLACES=360, PETRI_TRANSITIONS=465} [2024-06-14 14:07:23,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-14 14:07:23,224 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 465 transitions, 8282 flow [2024-06-14 14:07:23,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:23,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:23,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:23,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 14:07:23,224 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:23,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:23,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1035446917, now seen corresponding path program 7 times [2024-06-14 14:07:23,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:23,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889549169] [2024-06-14 14:07:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:23,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:23,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:23,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889549169] [2024-06-14 14:07:23,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889549169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:23,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:23,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109891432] [2024-06-14 14:07:23,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:23,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:23,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:23,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:23,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:23,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 465 transitions, 8282 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:23,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:23,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:23,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:24,415 INFO L124 PetriNetUnfolderBase]: 2656/4476 cut-off events. [2024-06-14 14:07:24,415 INFO L125 PetriNetUnfolderBase]: For 383460/383463 co-relation queries the response was YES. [2024-06-14 14:07:24,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33135 conditions, 4476 events. 2656/4476 cut-off events. For 383460/383463 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 28824 event pairs, 527 based on Foata normal form. 3/4477 useless extension candidates. Maximal degree in co-relation 32981. Up to 3644 conditions per place. [2024-06-14 14:07:24,482 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 313 selfloop transitions, 174 changer transitions 0/493 dead transitions. [2024-06-14 14:07:24,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 493 transitions, 9714 flow [2024-06-14 14:07:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:07:24,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 14:07:24,483 INFO L175 Difference]: Start difference. First operand has 360 places, 465 transitions, 8282 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:07:24,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 493 transitions, 9714 flow [2024-06-14 14:07:26,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 493 transitions, 9504 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:26,695 INFO L231 Difference]: Finished difference. Result has 362 places, 468 transitions, 8463 flow [2024-06-14 14:07:26,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8072, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8463, PETRI_PLACES=362, PETRI_TRANSITIONS=468} [2024-06-14 14:07:26,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-14 14:07:26,695 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 468 transitions, 8463 flow [2024-06-14 14:07:26,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:26,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:26,696 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 14:07:26,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 14:07:26,696 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:26,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:26,697 INFO L85 PathProgramCache]: Analyzing trace with hash -90195205, now seen corresponding path program 8 times [2024-06-14 14:07:26,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:26,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143291522] [2024-06-14 14:07:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:26,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:27,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:27,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143291522] [2024-06-14 14:07:27,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143291522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:27,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:27,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:27,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628091163] [2024-06-14 14:07:27,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:27,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:27,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:27,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:27,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:27,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:27,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 468 transitions, 8463 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:27,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:27,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:27,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:27,924 INFO L124 PetriNetUnfolderBase]: 2661/4485 cut-off events. [2024-06-14 14:07:27,924 INFO L125 PetriNetUnfolderBase]: For 392151/392154 co-relation queries the response was YES. [2024-06-14 14:07:27,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33355 conditions, 4485 events. 2661/4485 cut-off events. For 392151/392154 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28924 event pairs, 527 based on Foata normal form. 3/4486 useless extension candidates. Maximal degree in co-relation 33200. Up to 3650 conditions per place. [2024-06-14 14:07:27,984 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 320 selfloop transitions, 166 changer transitions 0/492 dead transitions. [2024-06-14 14:07:27,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 492 transitions, 9711 flow [2024-06-14 14:07:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 14:07:27,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 14:07:27,986 INFO L175 Difference]: Start difference. First operand has 362 places, 468 transitions, 8463 flow. Second operand 7 states and 163 transitions. [2024-06-14 14:07:27,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 492 transitions, 9711 flow [2024-06-14 14:07:29,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 492 transitions, 9395 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:29,833 INFO L231 Difference]: Finished difference. Result has 365 places, 471 transitions, 8530 flow [2024-06-14 14:07:29,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8150, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8530, PETRI_PLACES=365, PETRI_TRANSITIONS=471} [2024-06-14 14:07:29,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-14 14:07:29,834 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 471 transitions, 8530 flow [2024-06-14 14:07:29,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:29,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:29,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:29,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 14:07:29,834 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:29,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:29,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1035268357, now seen corresponding path program 9 times [2024-06-14 14:07:29,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:29,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549699304] [2024-06-14 14:07:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:29,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:30,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:30,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549699304] [2024-06-14 14:07:30,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549699304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:30,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:30,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:30,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078003383] [2024-06-14 14:07:30,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:30,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:30,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:30,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:30,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:30,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 471 transitions, 8530 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:30,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:30,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:30,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:31,068 INFO L124 PetriNetUnfolderBase]: 2658/4481 cut-off events. [2024-06-14 14:07:31,068 INFO L125 PetriNetUnfolderBase]: For 395783/395786 co-relation queries the response was YES. [2024-06-14 14:07:31,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33362 conditions, 4481 events. 2658/4481 cut-off events. For 395783/395786 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28952 event pairs, 527 based on Foata normal form. 3/4482 useless extension candidates. Maximal degree in co-relation 33206. Up to 3647 conditions per place. [2024-06-14 14:07:31,125 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 304 selfloop transitions, 186 changer transitions 0/496 dead transitions. [2024-06-14 14:07:31,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 496 transitions, 9938 flow [2024-06-14 14:07:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 14:07:31,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-14 14:07:31,126 INFO L175 Difference]: Start difference. First operand has 365 places, 471 transitions, 8530 flow. Second operand 10 states and 218 transitions. [2024-06-14 14:07:31,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 496 transitions, 9938 flow [2024-06-14 14:07:33,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 496 transitions, 9702 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:33,314 INFO L231 Difference]: Finished difference. Result has 371 places, 471 transitions, 8672 flow [2024-06-14 14:07:33,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8294, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8672, PETRI_PLACES=371, PETRI_TRANSITIONS=471} [2024-06-14 14:07:33,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 14:07:33,315 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 471 transitions, 8672 flow [2024-06-14 14:07:33,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:33,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:33,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:33,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 14:07:33,315 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:33,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:33,316 INFO L85 PathProgramCache]: Analyzing trace with hash -90022225, now seen corresponding path program 10 times [2024-06-14 14:07:33,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:33,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862648856] [2024-06-14 14:07:33,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:33,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:33,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862648856] [2024-06-14 14:07:33,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862648856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:33,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:33,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:33,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219904137] [2024-06-14 14:07:33,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:33,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:33,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:33,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:33,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:33,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 471 transitions, 8672 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:33,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:33,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:33,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:34,521 INFO L124 PetriNetUnfolderBase]: 2655/4477 cut-off events. [2024-06-14 14:07:34,521 INFO L125 PetriNetUnfolderBase]: For 400340/400343 co-relation queries the response was YES. [2024-06-14 14:07:34,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33469 conditions, 4477 events. 2655/4477 cut-off events. For 400340/400343 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28873 event pairs, 527 based on Foata normal form. 3/4478 useless extension candidates. Maximal degree in co-relation 33312. Up to 3644 conditions per place. [2024-06-14 14:07:34,584 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 313 selfloop transitions, 175 changer transitions 0/494 dead transitions. [2024-06-14 14:07:34,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 494 transitions, 9890 flow [2024-06-14 14:07:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 14:07:34,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 14:07:34,585 INFO L175 Difference]: Start difference. First operand has 371 places, 471 transitions, 8672 flow. Second operand 9 states and 200 transitions. [2024-06-14 14:07:34,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 494 transitions, 9890 flow [2024-06-14 14:07:36,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 494 transitions, 9472 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:36,906 INFO L231 Difference]: Finished difference. Result has 372 places, 471 transitions, 8614 flow [2024-06-14 14:07:36,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8254, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8614, PETRI_PLACES=372, PETRI_TRANSITIONS=471} [2024-06-14 14:07:36,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-14 14:07:36,906 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 471 transitions, 8614 flow [2024-06-14 14:07:36,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:36,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:36,906 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, 1] [2024-06-14 14:07:36,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 14:07:36,907 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:36,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:36,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1429140824, now seen corresponding path program 2 times [2024-06-14 14:07:36,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:36,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655078721] [2024-06-14 14:07:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:37,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:37,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655078721] [2024-06-14 14:07:37,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655078721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:37,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:37,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:37,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391243876] [2024-06-14 14:07:37,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:37,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:37,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:37,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:37,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:37,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:37,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 471 transitions, 8614 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:37,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:37,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:37,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:38,097 INFO L124 PetriNetUnfolderBase]: 2691/4533 cut-off events. [2024-06-14 14:07:38,097 INFO L125 PetriNetUnfolderBase]: For 447648/447651 co-relation queries the response was YES. [2024-06-14 14:07:38,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33916 conditions, 4533 events. 2691/4533 cut-off events. For 447648/447651 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 29265 event pairs, 543 based on Foata normal form. 12/4543 useless extension candidates. Maximal degree in co-relation 33758. Up to 3872 conditions per place. [2024-06-14 14:07:38,159 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 404 selfloop transitions, 84 changer transitions 0/494 dead transitions. [2024-06-14 14:07:38,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 494 transitions, 9715 flow [2024-06-14 14:07:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 14:07:38,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 14:07:38,160 INFO L175 Difference]: Start difference. First operand has 372 places, 471 transitions, 8614 flow. Second operand 7 states and 161 transitions. [2024-06-14 14:07:38,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 494 transitions, 9715 flow [2024-06-14 14:07:40,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 494 transitions, 9263 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:40,446 INFO L231 Difference]: Finished difference. Result has 370 places, 473 transitions, 8393 flow [2024-06-14 14:07:40,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8162, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8393, PETRI_PLACES=370, PETRI_TRANSITIONS=473} [2024-06-14 14:07:40,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-14 14:07:40,447 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 473 transitions, 8393 flow [2024-06-14 14:07:40,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:40,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:40,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:40,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 14:07:40,447 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:40,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:40,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1428844154, now seen corresponding path program 3 times [2024-06-14 14:07:40,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:40,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406054623] [2024-06-14 14:07:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:40,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:40,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:40,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406054623] [2024-06-14 14:07:40,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406054623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:40,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:40,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:40,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782360403] [2024-06-14 14:07:40,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:40,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:40,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:40,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:40,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:40,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:40,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 473 transitions, 8393 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:40,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:40,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:40,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:41,769 INFO L124 PetriNetUnfolderBase]: 2681/4517 cut-off events. [2024-06-14 14:07:41,770 INFO L125 PetriNetUnfolderBase]: For 417003/417006 co-relation queries the response was YES. [2024-06-14 14:07:41,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32949 conditions, 4517 events. 2681/4517 cut-off events. For 417003/417006 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 29101 event pairs, 517 based on Foata normal form. 12/4527 useless extension candidates. Maximal degree in co-relation 32790. Up to 3520 conditions per place. [2024-06-14 14:07:41,837 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 405 selfloop transitions, 90 changer transitions 0/501 dead transitions. [2024-06-14 14:07:41,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 501 transitions, 9734 flow [2024-06-14 14:07:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:41,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 14:07:41,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 14:07:41,838 INFO L175 Difference]: Start difference. First operand has 370 places, 473 transitions, 8393 flow. Second operand 7 states and 165 transitions. [2024-06-14 14:07:41,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 501 transitions, 9734 flow [2024-06-14 14:07:44,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 501 transitions, 9536 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:44,140 INFO L231 Difference]: Finished difference. Result has 372 places, 475 transitions, 8442 flow [2024-06-14 14:07:44,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8195, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8442, PETRI_PLACES=372, PETRI_TRANSITIONS=475} [2024-06-14 14:07:44,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-14 14:07:44,141 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 475 transitions, 8442 flow [2024-06-14 14:07:44,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:44,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:44,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:44,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 14:07:44,141 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:44,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:44,142 INFO L85 PathProgramCache]: Analyzing trace with hash -284529110, now seen corresponding path program 4 times [2024-06-14 14:07:44,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:44,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662291447] [2024-06-14 14:07:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:44,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:44,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662291447] [2024-06-14 14:07:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662291447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:44,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:44,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:44,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203748525] [2024-06-14 14:07:44,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:44,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:44,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:44,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:44,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 475 transitions, 8442 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:44,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:44,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:44,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:45,455 INFO L124 PetriNetUnfolderBase]: 2702/4534 cut-off events. [2024-06-14 14:07:45,455 INFO L125 PetriNetUnfolderBase]: For 402154/402154 co-relation queries the response was YES. [2024-06-14 14:07:45,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33538 conditions, 4534 events. 2702/4534 cut-off events. For 402154/402154 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29156 event pairs, 550 based on Foata normal form. 2/4529 useless extension candidates. Maximal degree in co-relation 33378. Up to 3929 conditions per place. [2024-06-14 14:07:45,514 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 421 selfloop transitions, 89 changer transitions 0/516 dead transitions. [2024-06-14 14:07:45,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 516 transitions, 9976 flow [2024-06-14 14:07:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:07:45,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 14:07:45,516 INFO L175 Difference]: Start difference. First operand has 372 places, 475 transitions, 8442 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:07:45,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 516 transitions, 9976 flow [2024-06-14 14:07:47,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 516 transitions, 9784 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:47,531 INFO L231 Difference]: Finished difference. Result has 382 places, 486 transitions, 8758 flow [2024-06-14 14:07:47,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8254, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8758, PETRI_PLACES=382, PETRI_TRANSITIONS=486} [2024-06-14 14:07:47,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-14 14:07:47,531 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 486 transitions, 8758 flow [2024-06-14 14:07:47,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:47,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:47,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:47,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 14:07:47,532 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:47,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:47,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1947498328, now seen corresponding path program 5 times [2024-06-14 14:07:47,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:47,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505032174] [2024-06-14 14:07:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:47,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:47,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:47,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505032174] [2024-06-14 14:07:47,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505032174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:47,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:47,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:47,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744870270] [2024-06-14 14:07:47,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:47,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:47,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:47,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:47,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 486 transitions, 8758 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:47,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:47,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:47,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:48,782 INFO L124 PetriNetUnfolderBase]: 2710/4551 cut-off events. [2024-06-14 14:07:48,782 INFO L125 PetriNetUnfolderBase]: For 410374/410374 co-relation queries the response was YES. [2024-06-14 14:07:48,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33766 conditions, 4551 events. 2710/4551 cut-off events. For 410374/410374 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29363 event pairs, 557 based on Foata normal form. 2/4546 useless extension candidates. Maximal degree in co-relation 33602. Up to 3857 conditions per place. [2024-06-14 14:07:48,875 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 348 selfloop transitions, 160 changer transitions 0/514 dead transitions. [2024-06-14 14:07:48,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 514 transitions, 9894 flow [2024-06-14 14:07:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-14 14:07:48,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 14:07:48,877 INFO L175 Difference]: Start difference. First operand has 382 places, 486 transitions, 8758 flow. Second operand 12 states and 252 transitions. [2024-06-14 14:07:48,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 514 transitions, 9894 flow [2024-06-14 14:07:50,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 514 transitions, 9737 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:50,938 INFO L231 Difference]: Finished difference. Result has 390 places, 488 transitions, 8988 flow [2024-06-14 14:07:50,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8627, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8988, PETRI_PLACES=390, PETRI_TRANSITIONS=488} [2024-06-14 14:07:50,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 14:07:50,939 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 488 transitions, 8988 flow [2024-06-14 14:07:50,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:50,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:50,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:50,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 14:07:50,940 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:50,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:50,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1125451329, now seen corresponding path program 11 times [2024-06-14 14:07:50,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:50,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053536177] [2024-06-14 14:07:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:50,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:51,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:51,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053536177] [2024-06-14 14:07:51,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053536177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:51,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:51,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:51,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872094935] [2024-06-14 14:07:51,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:51,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:51,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:51,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:51,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:51,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:51,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 488 transitions, 8988 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:51,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:51,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:52,222 INFO L124 PetriNetUnfolderBase]: 2715/4569 cut-off events. [2024-06-14 14:07:52,222 INFO L125 PetriNetUnfolderBase]: For 413312/413315 co-relation queries the response was YES. [2024-06-14 14:07:52,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34077 conditions, 4569 events. 2715/4569 cut-off events. For 413312/413315 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29558 event pairs, 559 based on Foata normal form. 3/4564 useless extension candidates. Maximal degree in co-relation 33911. Up to 4032 conditions per place. [2024-06-14 14:07:52,289 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 467 selfloop transitions, 39 changer transitions 0/512 dead transitions. [2024-06-14 14:07:52,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 512 transitions, 10104 flow [2024-06-14 14:07:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 14:07:52,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-14 14:07:52,290 INFO L175 Difference]: Start difference. First operand has 390 places, 488 transitions, 8988 flow. Second operand 8 states and 173 transitions. [2024-06-14 14:07:52,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 512 transitions, 10104 flow [2024-06-14 14:07:54,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 512 transitions, 9767 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:54,501 INFO L231 Difference]: Finished difference. Result has 389 places, 491 transitions, 8793 flow [2024-06-14 14:07:54,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8651, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8793, PETRI_PLACES=389, PETRI_TRANSITIONS=491} [2024-06-14 14:07:54,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 14:07:54,502 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 491 transitions, 8793 flow [2024-06-14 14:07:54,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:54,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:54,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:54,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 14:07:54,503 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:54,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash -281667593, now seen corresponding path program 12 times [2024-06-14 14:07:54,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:54,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445439304] [2024-06-14 14:07:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:54,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:54,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:54,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445439304] [2024-06-14 14:07:54,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445439304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:54,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:54,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127351376] [2024-06-14 14:07:54,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:54,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:54,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:54,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 491 transitions, 8793 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:54,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:54,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:54,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:55,656 INFO L124 PetriNetUnfolderBase]: 2728/4591 cut-off events. [2024-06-14 14:07:55,656 INFO L125 PetriNetUnfolderBase]: For 425235/425238 co-relation queries the response was YES. [2024-06-14 14:07:55,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34067 conditions, 4591 events. 2728/4591 cut-off events. For 425235/425238 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29705 event pairs, 559 based on Foata normal form. 3/4586 useless extension candidates. Maximal degree in co-relation 33900. Up to 3565 conditions per place. [2024-06-14 14:07:55,722 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 260 changer transitions 0/521 dead transitions. [2024-06-14 14:07:55,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 521 transitions, 10589 flow [2024-06-14 14:07:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:55,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:07:55,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 14:07:55,724 INFO L175 Difference]: Start difference. First operand has 389 places, 491 transitions, 8793 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:07:55,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 521 transitions, 10589 flow [2024-06-14 14:07:57,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 521 transitions, 10487 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:57,851 INFO L231 Difference]: Finished difference. Result has 394 places, 497 transitions, 9333 flow [2024-06-14 14:07:57,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8691, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9333, PETRI_PLACES=394, PETRI_TRANSITIONS=497} [2024-06-14 14:07:57,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-14 14:07:57,851 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 497 transitions, 9333 flow [2024-06-14 14:07:57,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:57,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:57,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:57,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 14:07:57,852 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:57,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:57,852 INFO L85 PathProgramCache]: Analyzing trace with hash -281678753, now seen corresponding path program 13 times [2024-06-14 14:07:57,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:57,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857404397] [2024-06-14 14:07:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:57,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:58,146 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 14:07:58,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:58,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857404397] [2024-06-14 14:07:58,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857404397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:58,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:58,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:58,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189333186] [2024-06-14 14:07:58,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:58,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:58,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:58,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:58,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:07:58,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 497 transitions, 9333 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:58,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:58,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:07:58,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:59,089 INFO L124 PetriNetUnfolderBase]: 2725/4587 cut-off events. [2024-06-14 14:07:59,089 INFO L125 PetriNetUnfolderBase]: For 430829/430832 co-relation queries the response was YES. [2024-06-14 14:07:59,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34524 conditions, 4587 events. 2725/4587 cut-off events. For 430829/430832 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29669 event pairs, 559 based on Foata normal form. 3/4582 useless extension candidates. Maximal degree in co-relation 34356. Up to 3562 conditions per place. [2024-06-14 14:07:59,157 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 259 changer transitions 0/520 dead transitions. [2024-06-14 14:07:59,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 520 transitions, 10815 flow [2024-06-14 14:07:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:59,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:07:59,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 14:07:59,158 INFO L175 Difference]: Start difference. First operand has 394 places, 497 transitions, 9333 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:07:59,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 520 transitions, 10815 flow [2024-06-14 14:08:01,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 520 transitions, 10202 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:01,513 INFO L231 Difference]: Finished difference. Result has 398 places, 497 transitions, 9244 flow [2024-06-14 14:08:01,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8720, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9244, PETRI_PLACES=398, PETRI_TRANSITIONS=497} [2024-06-14 14:08:01,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-14 14:08:01,514 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 497 transitions, 9244 flow [2024-06-14 14:08:01,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:01,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:01,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:01,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 14:08:01,514 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:01,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:01,516 INFO L85 PathProgramCache]: Analyzing trace with hash -637848022, now seen corresponding path program 6 times [2024-06-14 14:08:01,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:01,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514687278] [2024-06-14 14:08:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:01,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:01,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:01,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514687278] [2024-06-14 14:08:01,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514687278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:01,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:01,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:01,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687660753] [2024-06-14 14:08:01,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:01,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:01,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:01,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:01,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:02,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:02,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 497 transitions, 9244 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:02,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:02,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:02,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:02,925 INFO L124 PetriNetUnfolderBase]: 2803/4694 cut-off events. [2024-06-14 14:08:02,925 INFO L125 PetriNetUnfolderBase]: For 466504/466504 co-relation queries the response was YES. [2024-06-14 14:08:02,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35444 conditions, 4694 events. 2803/4694 cut-off events. For 466504/466504 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 30360 event pairs, 478 based on Foata normal form. 2/4689 useless extension candidates. Maximal degree in co-relation 35276. Up to 3715 conditions per place. [2024-06-14 14:08:02,991 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 429 selfloop transitions, 107 changer transitions 0/542 dead transitions. [2024-06-14 14:08:02,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 542 transitions, 11048 flow [2024-06-14 14:08:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:08:02,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:08:02,992 INFO L175 Difference]: Start difference. First operand has 398 places, 497 transitions, 9244 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:08:02,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 542 transitions, 11048 flow [2024-06-14 14:08:05,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 542 transitions, 10556 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:05,187 INFO L231 Difference]: Finished difference. Result has 400 places, 508 transitions, 9251 flow [2024-06-14 14:08:05,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8752, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9251, PETRI_PLACES=400, PETRI_TRANSITIONS=508} [2024-06-14 14:08:05,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-14 14:08:05,187 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 508 transitions, 9251 flow [2024-06-14 14:08:05,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:05,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:05,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:05,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 14:08:05,188 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:05,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:05,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1678513258, now seen corresponding path program 7 times [2024-06-14 14:08:05,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:05,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105816274] [2024-06-14 14:08:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:05,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:05,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:05,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105816274] [2024-06-14 14:08:05,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105816274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:05,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:05,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906450600] [2024-06-14 14:08:05,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:05,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:05,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 508 transitions, 9251 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:05,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:05,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:05,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:06,619 INFO L124 PetriNetUnfolderBase]: 2824/4727 cut-off events. [2024-06-14 14:08:06,619 INFO L125 PetriNetUnfolderBase]: For 484605/484605 co-relation queries the response was YES. [2024-06-14 14:08:06,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36218 conditions, 4727 events. 2824/4727 cut-off events. For 484605/484605 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 30593 event pairs, 462 based on Foata normal form. 2/4722 useless extension candidates. Maximal degree in co-relation 36048. Up to 3553 conditions per place. [2024-06-14 14:08:06,686 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 190 changer transitions 0/550 dead transitions. [2024-06-14 14:08:06,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 550 transitions, 11073 flow [2024-06-14 14:08:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-14 14:08:06,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:08:06,687 INFO L175 Difference]: Start difference. First operand has 400 places, 508 transitions, 9251 flow. Second operand 11 states and 246 transitions. [2024-06-14 14:08:06,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 550 transitions, 11073 flow [2024-06-14 14:08:09,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 550 transitions, 10807 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:09,082 INFO L231 Difference]: Finished difference. Result has 407 places, 514 transitions, 9613 flow [2024-06-14 14:08:09,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9039, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9613, PETRI_PLACES=407, PETRI_TRANSITIONS=514} [2024-06-14 14:08:09,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-14 14:08:09,083 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 514 transitions, 9613 flow [2024-06-14 14:08:09,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:09,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:09,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:09,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 14:08:09,083 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:09,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:09,083 INFO L85 PathProgramCache]: Analyzing trace with hash 53321560, now seen corresponding path program 8 times [2024-06-14 14:08:09,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:09,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16937487] [2024-06-14 14:08:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:09,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:09,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:09,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16937487] [2024-06-14 14:08:09,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16937487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:09,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:09,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:09,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022213467] [2024-06-14 14:08:09,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:09,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:09,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:09,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:09,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:09,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:09,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 514 transitions, 9613 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:09,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:09,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:09,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:10,452 INFO L124 PetriNetUnfolderBase]: 2858/4775 cut-off events. [2024-06-14 14:08:10,452 INFO L125 PetriNetUnfolderBase]: For 513424/513424 co-relation queries the response was YES. [2024-06-14 14:08:10,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37625 conditions, 4775 events. 2858/4775 cut-off events. For 513424/513424 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 30903 event pairs, 570 based on Foata normal form. 2/4768 useless extension candidates. Maximal degree in co-relation 37452. Up to 4007 conditions per place. [2024-06-14 14:08:10,528 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 165 changer transitions 0/547 dead transitions. [2024-06-14 14:08:10,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 547 transitions, 11121 flow [2024-06-14 14:08:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 14:08:10,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-14 14:08:10,529 INFO L175 Difference]: Start difference. First operand has 407 places, 514 transitions, 9613 flow. Second operand 11 states and 239 transitions. [2024-06-14 14:08:10,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 547 transitions, 11121 flow [2024-06-14 14:08:12,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 547 transitions, 10759 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:12,675 INFO L231 Difference]: Finished difference. Result has 412 places, 520 transitions, 9751 flow [2024-06-14 14:08:12,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9257, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9751, PETRI_PLACES=412, PETRI_TRANSITIONS=520} [2024-06-14 14:08:12,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-14 14:08:12,676 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 520 transitions, 9751 flow [2024-06-14 14:08:12,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:12,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:12,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:12,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 14:08:12,676 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:12,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:12,677 INFO L85 PathProgramCache]: Analyzing trace with hash 44750680, now seen corresponding path program 9 times [2024-06-14 14:08:12,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:12,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766783543] [2024-06-14 14:08:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:12,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:12,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:12,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766783543] [2024-06-14 14:08:12,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766783543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:12,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:12,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:12,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110167009] [2024-06-14 14:08:12,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:12,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:12,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:12,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:13,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:13,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 520 transitions, 9751 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:13,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:13,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:13,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:14,005 INFO L124 PetriNetUnfolderBase]: 2853/4770 cut-off events. [2024-06-14 14:08:14,006 INFO L125 PetriNetUnfolderBase]: For 512157/512157 co-relation queries the response was YES. [2024-06-14 14:08:14,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37319 conditions, 4770 events. 2853/4770 cut-off events. For 512157/512157 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 30889 event pairs, 573 based on Foata normal form. 2/4765 useless extension candidates. Maximal degree in co-relation 37144. Up to 4070 conditions per place. [2024-06-14 14:08:14,078 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 379 selfloop transitions, 157 changer transitions 0/542 dead transitions. [2024-06-14 14:08:14,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 542 transitions, 10875 flow [2024-06-14 14:08:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-14 14:08:14,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-06-14 14:08:14,079 INFO L175 Difference]: Start difference. First operand has 412 places, 520 transitions, 9751 flow. Second operand 11 states and 234 transitions. [2024-06-14 14:08:14,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 542 transitions, 10875 flow [2024-06-14 14:08:16,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 542 transitions, 10539 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:16,697 INFO L231 Difference]: Finished difference. Result has 415 places, 520 transitions, 9734 flow [2024-06-14 14:08:16,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9415, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9734, PETRI_PLACES=415, PETRI_TRANSITIONS=520} [2024-06-14 14:08:16,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-14 14:08:16,698 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 520 transitions, 9734 flow [2024-06-14 14:08:16,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:16,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:16,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:16,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 14:08:16,698 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:16,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:16,699 INFO L85 PathProgramCache]: Analyzing trace with hash 120507039, now seen corresponding path program 14 times [2024-06-14 14:08:16,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:16,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437087250] [2024-06-14 14:08:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:17,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:17,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437087250] [2024-06-14 14:08:17,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437087250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:17,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:17,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:17,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384157826] [2024-06-14 14:08:17,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:17,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:17,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:17,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:17,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:17,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:17,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 520 transitions, 9734 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:17,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:17,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:17,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:17,984 INFO L124 PetriNetUnfolderBase]: 2866/4801 cut-off events. [2024-06-14 14:08:17,984 INFO L125 PetriNetUnfolderBase]: For 522523/522526 co-relation queries the response was YES. [2024-06-14 14:08:18,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37548 conditions, 4801 events. 2866/4801 cut-off events. For 522523/522526 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31194 event pairs, 575 based on Foata normal form. 3/4796 useless extension candidates. Maximal degree in co-relation 37372. Up to 3769 conditions per place. [2024-06-14 14:08:18,054 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 258 changer transitions 0/545 dead transitions. [2024-06-14 14:08:18,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 545 transitions, 11380 flow [2024-06-14 14:08:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 14:08:18,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 14:08:18,056 INFO L175 Difference]: Start difference. First operand has 415 places, 520 transitions, 9734 flow. Second operand 10 states and 215 transitions. [2024-06-14 14:08:18,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 545 transitions, 11380 flow [2024-06-14 14:08:20,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 545 transitions, 11041 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:20,887 INFO L231 Difference]: Finished difference. Result has 416 places, 526 transitions, 10021 flow [2024-06-14 14:08:20,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9395, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10021, PETRI_PLACES=416, PETRI_TRANSITIONS=526} [2024-06-14 14:08:20,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-14 14:08:20,888 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 526 transitions, 10021 flow [2024-06-14 14:08:20,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:20,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:20,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:20,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 14:08:20,888 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:20,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:20,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2110926845, now seen corresponding path program 15 times [2024-06-14 14:08:20,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:20,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626921956] [2024-06-14 14:08:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:20,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:21,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:21,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626921956] [2024-06-14 14:08:21,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626921956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:21,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:21,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:21,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226380585] [2024-06-14 14:08:21,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:21,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:21,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:21,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:21,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:21,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:21,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 526 transitions, 10021 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:21,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:21,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:21,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:22,249 INFO L124 PetriNetUnfolderBase]: 2871/4808 cut-off events. [2024-06-14 14:08:22,249 INFO L125 PetriNetUnfolderBase]: For 532958/532961 co-relation queries the response was YES. [2024-06-14 14:08:22,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37866 conditions, 4808 events. 2871/4808 cut-off events. For 532958/532961 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31185 event pairs, 545 based on Foata normal form. 3/4809 useless extension candidates. Maximal degree in co-relation 37689. Up to 4354 conditions per place. [2024-06-14 14:08:22,321 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 484 selfloop transitions, 56 changer transitions 0/546 dead transitions. [2024-06-14 14:08:22,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 546 transitions, 11199 flow [2024-06-14 14:08:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-14 14:08:22,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-14 14:08:22,322 INFO L175 Difference]: Start difference. First operand has 416 places, 526 transitions, 10021 flow. Second operand 10 states and 200 transitions. [2024-06-14 14:08:22,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 546 transitions, 11199 flow [2024-06-14 14:08:25,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 546 transitions, 10792 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:25,339 INFO L231 Difference]: Finished difference. Result has 420 places, 529 transitions, 9796 flow [2024-06-14 14:08:25,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9623, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9796, PETRI_PLACES=420, PETRI_TRANSITIONS=529} [2024-06-14 14:08:25,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-14 14:08:25,339 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 529 transitions, 9796 flow [2024-06-14 14:08:25,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:25,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:25,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:25,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 14:08:25,340 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:25,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2110552055, now seen corresponding path program 16 times [2024-06-14 14:08:25,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:25,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772515987] [2024-06-14 14:08:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:25,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:25,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:25,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772515987] [2024-06-14 14:08:25,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772515987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:25,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:25,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:25,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900120270] [2024-06-14 14:08:25,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:25,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:25,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:25,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:25,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 529 transitions, 9796 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:25,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:25,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:25,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:26,758 INFO L124 PetriNetUnfolderBase]: 2868/4806 cut-off events. [2024-06-14 14:08:26,758 INFO L125 PetriNetUnfolderBase]: For 534832/534835 co-relation queries the response was YES. [2024-06-14 14:08:26,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37317 conditions, 4806 events. 2868/4806 cut-off events. For 534832/534835 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31223 event pairs, 575 based on Foata normal form. 3/4801 useless extension candidates. Maximal degree in co-relation 37139. Up to 3772 conditions per place. [2024-06-14 14:08:26,827 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 260 changer transitions 0/547 dead transitions. [2024-06-14 14:08:26,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 547 transitions, 11134 flow [2024-06-14 14:08:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 14:08:26,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 14:08:26,828 INFO L175 Difference]: Start difference. First operand has 420 places, 529 transitions, 9796 flow. Second operand 10 states and 215 transitions. [2024-06-14 14:08:26,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 547 transitions, 11134 flow [2024-06-14 14:08:30,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 547 transitions, 11002 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:30,432 INFO L231 Difference]: Finished difference. Result has 423 places, 529 transitions, 10190 flow [2024-06-14 14:08:30,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9664, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10190, PETRI_PLACES=423, PETRI_TRANSITIONS=529} [2024-06-14 14:08:30,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 14:08:30,432 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 529 transitions, 10190 flow [2024-06-14 14:08:30,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:30,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:30,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:30,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 14:08:30,433 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:30,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:30,433 INFO L85 PathProgramCache]: Analyzing trace with hash 236687520, now seen corresponding path program 10 times [2024-06-14 14:08:30,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:30,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834879378] [2024-06-14 14:08:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:30,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:30,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:30,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834879378] [2024-06-14 14:08:30,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834879378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:30,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:30,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:30,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9281441] [2024-06-14 14:08:30,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:30,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:30,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:30,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:30,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:30,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 529 transitions, 10190 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:30,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:30,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:30,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:31,837 INFO L124 PetriNetUnfolderBase]: 2863/4786 cut-off events. [2024-06-14 14:08:31,837 INFO L125 PetriNetUnfolderBase]: For 541080/541080 co-relation queries the response was YES. [2024-06-14 14:08:31,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37650 conditions, 4786 events. 2863/4786 cut-off events. For 541080/541080 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31033 event pairs, 568 based on Foata normal form. 2/4781 useless extension candidates. Maximal degree in co-relation 37471. Up to 4161 conditions per place. [2024-06-14 14:08:31,912 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 467 selfloop transitions, 89 changer transitions 0/562 dead transitions. [2024-06-14 14:08:31,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 562 transitions, 11644 flow [2024-06-14 14:08:31,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:08:31,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 14:08:31,913 INFO L175 Difference]: Start difference. First operand has 423 places, 529 transitions, 10190 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:08:31,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 562 transitions, 11644 flow [2024-06-14 14:08:34,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 562 transitions, 11076 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:34,943 INFO L231 Difference]: Finished difference. Result has 426 places, 532 transitions, 9875 flow [2024-06-14 14:08:34,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9624, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9875, PETRI_PLACES=426, PETRI_TRANSITIONS=532} [2024-06-14 14:08:34,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-14 14:08:34,944 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 532 transitions, 9875 flow [2024-06-14 14:08:34,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:34,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:34,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:34,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 14:08:34,944 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:34,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:34,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2053588236, now seen corresponding path program 11 times [2024-06-14 14:08:34,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:34,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630929051] [2024-06-14 14:08:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:34,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:35,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:35,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630929051] [2024-06-14 14:08:35,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630929051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:35,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:35,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:35,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025620423] [2024-06-14 14:08:35,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:35,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:35,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:35,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:35,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 532 transitions, 9875 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:35,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:35,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:35,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:36,295 INFO L124 PetriNetUnfolderBase]: 2858/4779 cut-off events. [2024-06-14 14:08:36,295 INFO L125 PetriNetUnfolderBase]: For 534707/534707 co-relation queries the response was YES. [2024-06-14 14:08:36,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37052 conditions, 4779 events. 2858/4779 cut-off events. For 534707/534707 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 30994 event pairs, 569 based on Foata normal form. 2/4774 useless extension candidates. Maximal degree in co-relation 36871. Up to 4077 conditions per place. [2024-06-14 14:08:36,372 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 396 selfloop transitions, 156 changer transitions 0/558 dead transitions. [2024-06-14 14:08:36,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 558 transitions, 11041 flow [2024-06-14 14:08:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:08:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:08:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-14 14:08:36,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 14:08:36,373 INFO L175 Difference]: Start difference. First operand has 426 places, 532 transitions, 9875 flow. Second operand 12 states and 252 transitions. [2024-06-14 14:08:36,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 558 transitions, 11041 flow [2024-06-14 14:08:39,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 558 transitions, 10865 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:39,451 INFO L231 Difference]: Finished difference. Result has 433 places, 532 transitions, 10016 flow [2024-06-14 14:08:39,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9699, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10016, PETRI_PLACES=433, PETRI_TRANSITIONS=532} [2024-06-14 14:08:39,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-14 14:08:39,452 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 532 transitions, 10016 flow [2024-06-14 14:08:39,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:39,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:39,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:39,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 14:08:39,452 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:39,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:39,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2093116444, now seen corresponding path program 12 times [2024-06-14 14:08:39,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:39,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681103299] [2024-06-14 14:08:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:39,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:39,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:39,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681103299] [2024-06-14 14:08:39,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681103299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:39,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:39,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509481687] [2024-06-14 14:08:39,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:39,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:39,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:39,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:39,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:39,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:39,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 532 transitions, 10016 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:39,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:39,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:39,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:40,909 INFO L124 PetriNetUnfolderBase]: 2861/4793 cut-off events. [2024-06-14 14:08:40,909 INFO L125 PetriNetUnfolderBase]: For 544254/544254 co-relation queries the response was YES. [2024-06-14 14:08:40,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37007 conditions, 4793 events. 2861/4793 cut-off events. For 544254/544254 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31147 event pairs, 563 based on Foata normal form. 4/4792 useless extension candidates. Maximal degree in co-relation 36825. Up to 4217 conditions per place. [2024-06-14 14:08:40,986 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 481 selfloop transitions, 71 changer transitions 0/558 dead transitions. [2024-06-14 14:08:40,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 558 transitions, 11224 flow [2024-06-14 14:08:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 14:08:40,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:08:40,987 INFO L175 Difference]: Start difference. First operand has 433 places, 532 transitions, 10016 flow. Second operand 7 states and 164 transitions. [2024-06-14 14:08:40,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 558 transitions, 11224 flow [2024-06-14 14:08:43,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 558 transitions, 10901 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:43,985 INFO L231 Difference]: Finished difference. Result has 431 places, 534 transitions, 9895 flow [2024-06-14 14:08:43,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9693, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9895, PETRI_PLACES=431, PETRI_TRANSITIONS=534} [2024-06-14 14:08:43,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-14 14:08:43,986 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 534 transitions, 9895 flow [2024-06-14 14:08:43,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:43,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:43,986 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, 1] [2024-06-14 14:08:43,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 14:08:43,986 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:43,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:43,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2093301142, now seen corresponding path program 4 times [2024-06-14 14:08:43,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:43,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085670335] [2024-06-14 14:08:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:43,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:44,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085670335] [2024-06-14 14:08:44,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085670335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:44,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:44,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:44,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604106206] [2024-06-14 14:08:44,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:44,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:44,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:44,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:44,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:44,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 534 transitions, 9895 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:44,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:44,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:44,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:45,305 INFO L124 PetriNetUnfolderBase]: 2849/4769 cut-off events. [2024-06-14 14:08:45,305 INFO L125 PetriNetUnfolderBase]: For 527588/527588 co-relation queries the response was YES. [2024-06-14 14:08:45,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36544 conditions, 4769 events. 2849/4769 cut-off events. For 527588/527588 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 30929 event pairs, 570 based on Foata normal form. 2/4766 useless extension candidates. Maximal degree in co-relation 36361. Up to 4136 conditions per place. [2024-06-14 14:08:45,371 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 443 selfloop transitions, 103 changer transitions 0/552 dead transitions. [2024-06-14 14:08:45,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 552 transitions, 11031 flow [2024-06-14 14:08:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 14:08:45,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 14:08:45,373 INFO L175 Difference]: Start difference. First operand has 431 places, 534 transitions, 9895 flow. Second operand 7 states and 159 transitions. [2024-06-14 14:08:45,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 552 transitions, 11031 flow [2024-06-14 14:08:48,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 552 transitions, 10870 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:48,749 INFO L231 Difference]: Finished difference. Result has 434 places, 534 transitions, 9946 flow [2024-06-14 14:08:48,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9734, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9946, PETRI_PLACES=434, PETRI_TRANSITIONS=534} [2024-06-14 14:08:48,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-14 14:08:48,750 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 534 transitions, 9946 flow [2024-06-14 14:08:48,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:48,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:48,750 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, 1] [2024-06-14 14:08:48,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 14:08:48,751 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:48,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:48,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1099459754, now seen corresponding path program 13 times [2024-06-14 14:08:48,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:48,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132262267] [2024-06-14 14:08:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:48,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:49,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:49,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132262267] [2024-06-14 14:08:49,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132262267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:49,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:49,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:49,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3712234] [2024-06-14 14:08:49,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:49,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:49,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:49,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:49,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:49,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 534 transitions, 9946 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:49,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:49,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:49,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:50,104 INFO L124 PetriNetUnfolderBase]: 2852/4771 cut-off events. [2024-06-14 14:08:50,104 INFO L125 PetriNetUnfolderBase]: For 536834/536834 co-relation queries the response was YES. [2024-06-14 14:08:50,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36430 conditions, 4771 events. 2852/4771 cut-off events. For 536834/536834 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 30918 event pairs, 555 based on Foata normal form. 4/4770 useless extension candidates. Maximal degree in co-relation 36246. Up to 4138 conditions per place. [2024-06-14 14:08:50,176 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 102 changer transitions 0/560 dead transitions. [2024-06-14 14:08:50,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 560 transitions, 11162 flow [2024-06-14 14:08:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 14:08:50,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 14:08:50,177 INFO L175 Difference]: Start difference. First operand has 434 places, 534 transitions, 9946 flow. Second operand 7 states and 166 transitions. [2024-06-14 14:08:50,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 560 transitions, 11162 flow [2024-06-14 14:08:53,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 560 transitions, 10861 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:53,714 INFO L231 Difference]: Finished difference. Result has 434 places, 536 transitions, 9912 flow [2024-06-14 14:08:53,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9645, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9912, PETRI_PLACES=434, PETRI_TRANSITIONS=536} [2024-06-14 14:08:53,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-14 14:08:53,714 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 536 transitions, 9912 flow [2024-06-14 14:08:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:53,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:53,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:53,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 14:08:53,715 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:53,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:53,715 INFO L85 PathProgramCache]: Analyzing trace with hash -821013766, now seen corresponding path program 14 times [2024-06-14 14:08:53,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:53,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666691499] [2024-06-14 14:08:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:54,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:54,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666691499] [2024-06-14 14:08:54,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666691499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:54,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:54,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:54,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237153583] [2024-06-14 14:08:54,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:54,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:54,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:54,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:54,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 536 transitions, 9912 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:54,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:54,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:54,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:55,209 INFO L124 PetriNetUnfolderBase]: 2842/4762 cut-off events. [2024-06-14 14:08:55,209 INFO L125 PetriNetUnfolderBase]: For 518040/518040 co-relation queries the response was YES. [2024-06-14 14:08:55,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35837 conditions, 4762 events. 2842/4762 cut-off events. For 518040/518040 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 30944 event pairs, 448 based on Foata normal form. 4/4761 useless extension candidates. Maximal degree in co-relation 35652. Up to 3831 conditions per place. [2024-06-14 14:08:55,274 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 437 selfloop transitions, 123 changer transitions 0/566 dead transitions. [2024-06-14 14:08:55,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 566 transitions, 11154 flow [2024-06-14 14:08:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:08:55,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 14:08:55,275 INFO L175 Difference]: Start difference. First operand has 434 places, 536 transitions, 9912 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:08:55,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 566 transitions, 11154 flow [2024-06-14 14:08:58,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 566 transitions, 10925 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:58,697 INFO L231 Difference]: Finished difference. Result has 438 places, 538 transitions, 10018 flow [2024-06-14 14:08:58,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9685, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10018, PETRI_PLACES=438, PETRI_TRANSITIONS=538} [2024-06-14 14:08:58,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-14 14:08:58,697 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 538 transitions, 10018 flow [2024-06-14 14:08:58,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:58,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:58,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:58,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 14:08:58,698 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:58,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash -657803788, now seen corresponding path program 5 times [2024-06-14 14:08:58,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:58,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664470880] [2024-06-14 14:08:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:58,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:59,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:59,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664470880] [2024-06-14 14:08:59,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664470880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:59,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:59,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:08:59,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342014556] [2024-06-14 14:08:59,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:59,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:08:59,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:59,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:08:59,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:08:59,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:08:59,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 538 transitions, 10018 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:59,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:59,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:08:59,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:59,987 INFO L124 PetriNetUnfolderBase]: 2850/4777 cut-off events. [2024-06-14 14:08:59,987 INFO L125 PetriNetUnfolderBase]: For 514636/514636 co-relation queries the response was YES. [2024-06-14 14:09:00,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36292 conditions, 4777 events. 2850/4777 cut-off events. For 514636/514636 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 31039 event pairs, 535 based on Foata normal form. 2/4778 useless extension candidates. Maximal degree in co-relation 36105. Up to 4352 conditions per place. [2024-06-14 14:09:00,061 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 516 selfloop transitions, 33 changer transitions 0/555 dead transitions. [2024-06-14 14:09:00,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 555 transitions, 11203 flow [2024-06-14 14:09:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 14:09:00,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-14 14:09:00,062 INFO L175 Difference]: Start difference. First operand has 438 places, 538 transitions, 10018 flow. Second operand 7 states and 149 transitions. [2024-06-14 14:09:00,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 555 transitions, 11203 flow [2024-06-14 14:09:03,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 555 transitions, 10896 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:03,630 INFO L231 Difference]: Finished difference. Result has 439 places, 540 transitions, 9838 flow [2024-06-14 14:09:03,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9711, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9838, PETRI_PLACES=439, PETRI_TRANSITIONS=540} [2024-06-14 14:09:03,630 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-14 14:09:03,630 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 540 transitions, 9838 flow [2024-06-14 14:09:03,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:03,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:03,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:03,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 14:09:03,631 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:03,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:03,631 INFO L85 PathProgramCache]: Analyzing trace with hash -567756026, now seen corresponding path program 6 times [2024-06-14 14:09:03,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:03,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670445556] [2024-06-14 14:09:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:03,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:03,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:03,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670445556] [2024-06-14 14:09:03,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670445556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:03,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:03,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:03,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149498311] [2024-06-14 14:09:03,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:03,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:03,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:04,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:04,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 540 transitions, 9838 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:04,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:04,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:04,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:04,991 INFO L124 PetriNetUnfolderBase]: 2858/4785 cut-off events. [2024-06-14 14:09:04,991 INFO L125 PetriNetUnfolderBase]: For 520795/520795 co-relation queries the response was YES. [2024-06-14 14:09:05,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35980 conditions, 4785 events. 2858/4785 cut-off events. For 520795/520795 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31105 event pairs, 531 based on Foata normal form. 2/4786 useless extension candidates. Maximal degree in co-relation 35793. Up to 4348 conditions per place. [2024-06-14 14:09:05,063 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 516 selfloop transitions, 37 changer transitions 0/559 dead transitions. [2024-06-14 14:09:05,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 559 transitions, 11029 flow [2024-06-14 14:09:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 14:09:05,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-14 14:09:05,064 INFO L175 Difference]: Start difference. First operand has 439 places, 540 transitions, 9838 flow. Second operand 8 states and 167 transitions. [2024-06-14 14:09:05,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 559 transitions, 11029 flow [2024-06-14 14:09:08,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 559 transitions, 10927 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:08,311 INFO L231 Difference]: Finished difference. Result has 442 places, 542 transitions, 9864 flow [2024-06-14 14:09:08,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9736, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9864, PETRI_PLACES=442, PETRI_TRANSITIONS=542} [2024-06-14 14:09:08,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-14 14:09:08,312 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 542 transitions, 9864 flow [2024-06-14 14:09:08,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:08,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:08,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:08,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 14:09:08,312 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:08,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:08,313 INFO L85 PathProgramCache]: Analyzing trace with hash -753828287, now seen corresponding path program 17 times [2024-06-14 14:09:08,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:08,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574240030] [2024-06-14 14:09:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:08,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:08,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:08,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574240030] [2024-06-14 14:09:08,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574240030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:08,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:08,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:08,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743447525] [2024-06-14 14:09:08,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:08,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:08,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:08,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:08,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:08,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:08,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 542 transitions, 9864 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:08,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:08,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:08,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:09,637 INFO L124 PetriNetUnfolderBase]: 2863/4803 cut-off events. [2024-06-14 14:09:09,638 INFO L125 PetriNetUnfolderBase]: For 526680/526683 co-relation queries the response was YES. [2024-06-14 14:09:09,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36082 conditions, 4803 events. 2863/4803 cut-off events. For 526680/526683 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31356 event pairs, 614 based on Foata normal form. 3/4798 useless extension candidates. Maximal degree in co-relation 35894. Up to 3855 conditions per place. [2024-06-14 14:09:09,711 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 351 selfloop transitions, 210 changer transitions 0/567 dead transitions. [2024-06-14 14:09:09,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 567 transitions, 11559 flow [2024-06-14 14:09:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 14:09:09,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 14:09:09,712 INFO L175 Difference]: Start difference. First operand has 442 places, 542 transitions, 9864 flow. Second operand 7 states and 166 transitions. [2024-06-14 14:09:09,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 567 transitions, 11559 flow [2024-06-14 14:09:12,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 567 transitions, 11454 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:12,816 INFO L231 Difference]: Finished difference. Result has 443 places, 545 transitions, 10240 flow [2024-06-14 14:09:12,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9759, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10240, PETRI_PLACES=443, PETRI_TRANSITIONS=545} [2024-06-14 14:09:12,816 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-14 14:09:12,816 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 545 transitions, 10240 flow [2024-06-14 14:09:12,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:12,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:12,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:12,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 14:09:12,817 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:12,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1183860147, now seen corresponding path program 18 times [2024-06-14 14:09:12,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:12,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362893748] [2024-06-14 14:09:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:12,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:13,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:13,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362893748] [2024-06-14 14:09:13,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362893748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:13,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:13,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:13,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132582742] [2024-06-14 14:09:13,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:13,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:13,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:13,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 545 transitions, 10240 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:13,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:13,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:13,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:14,156 INFO L124 PetriNetUnfolderBase]: 2860/4797 cut-off events. [2024-06-14 14:09:14,156 INFO L125 PetriNetUnfolderBase]: For 529161/529164 co-relation queries the response was YES. [2024-06-14 14:09:14,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36432 conditions, 4797 events. 2860/4797 cut-off events. For 529161/529164 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31310 event pairs, 548 based on Foata normal form. 3/4798 useless extension candidates. Maximal degree in co-relation 36243. Up to 4069 conditions per place. [2024-06-14 14:09:14,228 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 425 selfloop transitions, 147 changer transitions 0/578 dead transitions. [2024-06-14 14:09:14,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 578 transitions, 11744 flow [2024-06-14 14:09:14,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 14:09:14,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-14 14:09:14,229 INFO L175 Difference]: Start difference. First operand has 443 places, 545 transitions, 10240 flow. Second operand 8 states and 194 transitions. [2024-06-14 14:09:14,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 578 transitions, 11744 flow [2024-06-14 14:09:17,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 578 transitions, 11326 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:17,489 INFO L231 Difference]: Finished difference. Result has 448 places, 546 transitions, 10211 flow [2024-06-14 14:09:17,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9824, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10211, PETRI_PLACES=448, PETRI_TRANSITIONS=546} [2024-06-14 14:09:17,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-14 14:09:17,490 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 546 transitions, 10211 flow [2024-06-14 14:09:17,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:17,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:17,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:17,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 14:09:17,490 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:17,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:17,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1191217377, now seen corresponding path program 19 times [2024-06-14 14:09:17,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:17,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277380152] [2024-06-14 14:09:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:17,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:17,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:17,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277380152] [2024-06-14 14:09:17,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277380152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:17,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:17,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238764986] [2024-06-14 14:09:17,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:17,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:17,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:17,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:17,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 546 transitions, 10211 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:17,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:17,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:17,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:18,834 INFO L124 PetriNetUnfolderBase]: 2857/4793 cut-off events. [2024-06-14 14:09:18,835 INFO L125 PetriNetUnfolderBase]: For 529032/529035 co-relation queries the response was YES. [2024-06-14 14:09:18,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36344 conditions, 4793 events. 2857/4793 cut-off events. For 529032/529035 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31275 event pairs, 548 based on Foata normal form. 3/4794 useless extension candidates. Maximal degree in co-relation 36153. Up to 4066 conditions per place. [2024-06-14 14:09:18,907 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 409 selfloop transitions, 162 changer transitions 0/577 dead transitions. [2024-06-14 14:09:18,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 577 transitions, 11681 flow [2024-06-14 14:09:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:09:18,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-14 14:09:18,909 INFO L175 Difference]: Start difference. First operand has 448 places, 546 transitions, 10211 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:09:18,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 577 transitions, 11681 flow [2024-06-14 14:09:22,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 577 transitions, 11351 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:22,517 INFO L231 Difference]: Finished difference. Result has 449 places, 547 transitions, 10340 flow [2024-06-14 14:09:22,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9883, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10340, PETRI_PLACES=449, PETRI_TRANSITIONS=547} [2024-06-14 14:09:22,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-14 14:09:22,518 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 547 transitions, 10340 flow [2024-06-14 14:09:22,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:22,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:22,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:22,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 14:09:22,518 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:22,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:22,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1191211797, now seen corresponding path program 20 times [2024-06-14 14:09:22,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:22,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837388468] [2024-06-14 14:09:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:22,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:22,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:22,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837388468] [2024-06-14 14:09:22,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837388468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:22,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:22,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:22,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539513841] [2024-06-14 14:09:22,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:22,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:22,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:22,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:22,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:22,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:22,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 547 transitions, 10340 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:22,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:22,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:22,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:23,865 INFO L124 PetriNetUnfolderBase]: 2854/4789 cut-off events. [2024-06-14 14:09:23,865 INFO L125 PetriNetUnfolderBase]: For 523027/523030 co-relation queries the response was YES. [2024-06-14 14:09:23,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36472 conditions, 4789 events. 2854/4789 cut-off events. For 523027/523030 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31241 event pairs, 538 based on Foata normal form. 3/4790 useless extension candidates. Maximal degree in co-relation 36280. Up to 4063 conditions per place. [2024-06-14 14:09:23,940 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 419 selfloop transitions, 148 changer transitions 0/573 dead transitions. [2024-06-14 14:09:23,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 573 transitions, 11540 flow [2024-06-14 14:09:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:09:23,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 14:09:23,941 INFO L175 Difference]: Start difference. First operand has 449 places, 547 transitions, 10340 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:09:23,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 573 transitions, 11540 flow [2024-06-14 14:09:27,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 573 transitions, 11362 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:27,528 INFO L231 Difference]: Finished difference. Result has 452 places, 547 transitions, 10478 flow [2024-06-14 14:09:27,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10162, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10478, PETRI_PLACES=452, PETRI_TRANSITIONS=547} [2024-06-14 14:09:27,528 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-14 14:09:27,528 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 547 transitions, 10478 flow [2024-06-14 14:09:27,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:27,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:27,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:27,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 14:09:27,529 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:27,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:27,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1584625977, now seen corresponding path program 21 times [2024-06-14 14:09:27,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:27,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456102706] [2024-06-14 14:09:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:27,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:27,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:27,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456102706] [2024-06-14 14:09:27,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456102706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:27,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:27,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:09:27,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451242584] [2024-06-14 14:09:27,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:27,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:09:27,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:27,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:09:27,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:09:27,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:27,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 547 transitions, 10478 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:27,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:27,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:27,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:28,837 INFO L124 PetriNetUnfolderBase]: 2851/4787 cut-off events. [2024-06-14 14:09:28,837 INFO L125 PetriNetUnfolderBase]: For 527855/527858 co-relation queries the response was YES. [2024-06-14 14:09:28,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36518 conditions, 4787 events. 2851/4787 cut-off events. For 527855/527858 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31279 event pairs, 614 based on Foata normal form. 3/4782 useless extension candidates. Maximal degree in co-relation 36325. Up to 3843 conditions per place. [2024-06-14 14:09:28,909 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 353 selfloop transitions, 205 changer transitions 0/564 dead transitions. [2024-06-14 14:09:28,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 564 transitions, 11636 flow [2024-06-14 14:09:28,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 14:09:28,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 14:09:28,910 INFO L175 Difference]: Start difference. First operand has 452 places, 547 transitions, 10478 flow. Second operand 7 states and 161 transitions. [2024-06-14 14:09:28,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 564 transitions, 11636 flow [2024-06-14 14:09:32,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 564 transitions, 11105 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 14:09:32,474 INFO L231 Difference]: Finished difference. Result has 449 places, 547 transitions, 10364 flow [2024-06-14 14:09:32,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9947, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10364, PETRI_PLACES=449, PETRI_TRANSITIONS=547} [2024-06-14 14:09:32,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-14 14:09:32,475 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 547 transitions, 10364 flow [2024-06-14 14:09:32,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:32,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:32,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:32,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 14:09:32,476 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:32,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1994082268, now seen corresponding path program 7 times [2024-06-14 14:09:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:32,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688891360] [2024-06-14 14:09:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:32,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:32,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688891360] [2024-06-14 14:09:32,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688891360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:32,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:32,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:32,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295855275] [2024-06-14 14:09:32,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:32,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:32,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:32,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:32,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:32,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 547 transitions, 10364 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:32,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:32,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:32,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:33,863 INFO L124 PetriNetUnfolderBase]: 2887/4836 cut-off events. [2024-06-14 14:09:33,863 INFO L125 PetriNetUnfolderBase]: For 595604/595607 co-relation queries the response was YES. [2024-06-14 14:09:33,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36990 conditions, 4836 events. 2887/4836 cut-off events. For 595604/595607 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 31539 event pairs, 551 based on Foata normal form. 12/4841 useless extension candidates. Maximal degree in co-relation 36796. Up to 4197 conditions per place. [2024-06-14 14:09:33,938 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 490 selfloop transitions, 79 changer transitions 0/575 dead transitions. [2024-06-14 14:09:33,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 575 transitions, 11643 flow [2024-06-14 14:09:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 14:09:33,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-14 14:09:33,939 INFO L175 Difference]: Start difference. First operand has 449 places, 547 transitions, 10364 flow. Second operand 6 states and 152 transitions. [2024-06-14 14:09:33,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 575 transitions, 11643 flow [2024-06-14 14:09:37,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 575 transitions, 11206 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:37,268 INFO L231 Difference]: Finished difference. Result has 449 places, 549 transitions, 10157 flow [2024-06-14 14:09:37,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9927, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10157, PETRI_PLACES=449, PETRI_TRANSITIONS=549} [2024-06-14 14:09:37,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-14 14:09:37,269 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 549 transitions, 10157 flow [2024-06-14 14:09:37,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:37,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:37,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:37,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 14:09:37,270 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:37,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1083176866, now seen corresponding path program 8 times [2024-06-14 14:09:37,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:37,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133133762] [2024-06-14 14:09:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:37,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:37,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:37,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133133762] [2024-06-14 14:09:37,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133133762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:37,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:37,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:37,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475388664] [2024-06-14 14:09:37,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:37,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:37,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:37,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:37,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:37,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:37,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 549 transitions, 10157 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:37,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:37,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:37,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:38,625 INFO L124 PetriNetUnfolderBase]: 2877/4825 cut-off events. [2024-06-14 14:09:38,625 INFO L125 PetriNetUnfolderBase]: For 544001/544004 co-relation queries the response was YES. [2024-06-14 14:09:38,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35822 conditions, 4825 events. 2877/4825 cut-off events. For 544001/544004 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 31395 event pairs, 421 based on Foata normal form. 12/4835 useless extension candidates. Maximal degree in co-relation 35627. Up to 3856 conditions per place. [2024-06-14 14:09:38,697 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 494 selfloop transitions, 82 changer transitions 0/582 dead transitions. [2024-06-14 14:09:38,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 582 transitions, 11728 flow [2024-06-14 14:09:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 14:09:38,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 14:09:38,698 INFO L175 Difference]: Start difference. First operand has 449 places, 549 transitions, 10157 flow. Second operand 6 states and 156 transitions. [2024-06-14 14:09:38,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 582 transitions, 11728 flow [2024-06-14 14:09:42,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 582 transitions, 11538 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:42,186 INFO L231 Difference]: Finished difference. Result has 450 places, 551 transitions, 10206 flow [2024-06-14 14:09:42,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9969, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10206, PETRI_PLACES=450, PETRI_TRANSITIONS=551} [2024-06-14 14:09:42,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-14 14:09:42,187 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 551 transitions, 10206 flow [2024-06-14 14:09:42,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:42,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:42,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:42,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 14:09:42,187 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:42,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash -806246654, now seen corresponding path program 9 times [2024-06-14 14:09:42,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:42,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145939141] [2024-06-14 14:09:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:42,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:42,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:42,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145939141] [2024-06-14 14:09:42,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145939141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:42,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:42,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:42,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770224717] [2024-06-14 14:09:42,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:42,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:42,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:42,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:42,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:42,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:42,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 551 transitions, 10206 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:42,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:42,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:42,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:43,553 INFO L124 PetriNetUnfolderBase]: 2865/4802 cut-off events. [2024-06-14 14:09:43,553 INFO L125 PetriNetUnfolderBase]: For 472360/472360 co-relation queries the response was YES. [2024-06-14 14:09:43,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35455 conditions, 4802 events. 2865/4802 cut-off events. For 472360/472360 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 31317 event pairs, 533 based on Foata normal form. 2/4803 useless extension candidates. Maximal degree in co-relation 35260. Up to 4219 conditions per place. [2024-06-14 14:09:43,625 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 485 selfloop transitions, 88 changer transitions 0/579 dead transitions. [2024-06-14 14:09:43,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 579 transitions, 11422 flow [2024-06-14 14:09:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 14:09:43,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 14:09:43,626 INFO L175 Difference]: Start difference. First operand has 450 places, 551 transitions, 10206 flow. Second operand 8 states and 187 transitions. [2024-06-14 14:09:43,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 579 transitions, 11422 flow [2024-06-14 14:09:46,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 579 transitions, 11233 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:46,323 INFO L231 Difference]: Finished difference. Result has 454 places, 551 transitions, 10202 flow [2024-06-14 14:09:46,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10017, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10202, PETRI_PLACES=454, PETRI_TRANSITIONS=551} [2024-06-14 14:09:46,324 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-14 14:09:46,324 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 551 transitions, 10202 flow [2024-06-14 14:09:46,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:46,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:46,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:46,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 14:09:46,325 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:46,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:46,325 INFO L85 PathProgramCache]: Analyzing trace with hash -805829084, now seen corresponding path program 10 times [2024-06-14 14:09:46,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:46,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316817962] [2024-06-14 14:09:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:46,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:46,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:46,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316817962] [2024-06-14 14:09:46,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316817962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:46,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:46,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:46,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174899210] [2024-06-14 14:09:46,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:46,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:46,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:46,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:46,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:46,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:46,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 551 transitions, 10202 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:46,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:46,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:46,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:47,875 INFO L124 PetriNetUnfolderBase]: 2873/4803 cut-off events. [2024-06-14 14:09:47,876 INFO L125 PetriNetUnfolderBase]: For 470973/470973 co-relation queries the response was YES. [2024-06-14 14:09:47,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35339 conditions, 4803 events. 2873/4803 cut-off events. For 470973/470973 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 31231 event pairs, 520 based on Foata normal form. 2/4799 useless extension candidates. Maximal degree in co-relation 35144. Up to 4131 conditions per place. [2024-06-14 14:09:47,951 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 478 selfloop transitions, 101 changer transitions 0/585 dead transitions. [2024-06-14 14:09:47,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 585 transitions, 11509 flow [2024-06-14 14:09:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:47,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:09:47,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 14:09:47,952 INFO L175 Difference]: Start difference. First operand has 454 places, 551 transitions, 10202 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:09:47,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 585 transitions, 11509 flow [2024-06-14 14:09:51,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 585 transitions, 11247 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 14:09:51,046 INFO L231 Difference]: Finished difference. Result has 454 places, 553 transitions, 10203 flow [2024-06-14 14:09:51,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9940, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10203, PETRI_PLACES=454, PETRI_TRANSITIONS=553} [2024-06-14 14:09:51,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-14 14:09:51,047 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 553 transitions, 10203 flow [2024-06-14 14:09:51,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:51,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:51,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:51,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 14:09:51,047 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:51,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:51,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1150994686, now seen corresponding path program 11 times [2024-06-14 14:09:51,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:51,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636100725] [2024-06-14 14:09:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:51,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:51,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:51,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636100725] [2024-06-14 14:09:51,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636100725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:51,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:51,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:51,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105236245] [2024-06-14 14:09:51,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:51,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:51,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:51,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:51,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 553 transitions, 10203 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:51,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:51,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:51,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:52,438 INFO L124 PetriNetUnfolderBase]: 2868/4810 cut-off events. [2024-06-14 14:09:52,438 INFO L125 PetriNetUnfolderBase]: For 471230/471233 co-relation queries the response was YES. [2024-06-14 14:09:52,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34598 conditions, 4810 events. 2868/4810 cut-off events. For 471230/471233 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 31298 event pairs, 381 based on Foata normal form. 10/4818 useless extension candidates. Maximal degree in co-relation 34402. Up to 3681 conditions per place. [2024-06-14 14:09:52,514 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 489 selfloop transitions, 91 changer transitions 0/586 dead transitions. [2024-06-14 14:09:52,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 586 transitions, 11772 flow [2024-06-14 14:09:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:09:52,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 14:09:52,515 INFO L175 Difference]: Start difference. First operand has 454 places, 553 transitions, 10203 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:09:52,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 586 transitions, 11772 flow [2024-06-14 14:09:55,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 586 transitions, 11530 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:55,097 INFO L231 Difference]: Finished difference. Result has 455 places, 555 transitions, 10206 flow [2024-06-14 14:09:55,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9967, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10206, PETRI_PLACES=455, PETRI_TRANSITIONS=555} [2024-06-14 14:09:55,098 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-14 14:09:55,098 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 555 transitions, 10206 flow [2024-06-14 14:09:55,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:55,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:55,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:55,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 14:09:55,098 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:55,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:55,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1145280766, now seen corresponding path program 12 times [2024-06-14 14:09:55,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:55,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224697909] [2024-06-14 14:09:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:55,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:55,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:55,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224697909] [2024-06-14 14:09:55,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224697909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:55,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:55,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:55,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647392474] [2024-06-14 14:09:55,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:55,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:55,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:55,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:09:55,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 555 transitions, 10206 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:55,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:55,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:09:55,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:56,508 INFO L124 PetriNetUnfolderBase]: 2856/4788 cut-off events. [2024-06-14 14:09:56,508 INFO L125 PetriNetUnfolderBase]: For 413235/413238 co-relation queries the response was YES. [2024-06-14 14:09:56,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34238 conditions, 4788 events. 2856/4788 cut-off events. For 413235/413238 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 31180 event pairs, 372 based on Foata normal form. 4/4790 useless extension candidates. Maximal degree in co-relation 34041. Up to 3673 conditions per place. [2024-06-14 14:09:56,586 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 485 selfloop transitions, 96 changer transitions 0/587 dead transitions. [2024-06-14 14:09:56,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 587 transitions, 11488 flow [2024-06-14 14:09:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:09:56,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-14 14:09:56,587 INFO L175 Difference]: Start difference. First operand has 455 places, 555 transitions, 10206 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:09:56,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 587 transitions, 11488 flow [2024-06-14 14:09:59,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 587 transitions, 11259 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:59,947 INFO L231 Difference]: Finished difference. Result has 458 places, 555 transitions, 10174 flow [2024-06-14 14:09:59,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9977, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10174, PETRI_PLACES=458, PETRI_TRANSITIONS=555} [2024-06-14 14:09:59,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 14:09:59,948 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 555 transitions, 10174 flow [2024-06-14 14:09:59,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:59,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:59,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:59,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 14:09:59,948 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:59,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:59,948 INFO L85 PathProgramCache]: Analyzing trace with hash -486751396, now seen corresponding path program 1 times [2024-06-14 14:09:59,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:59,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559475536] [2024-06-14 14:09:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:59,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:00,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:00,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559475536] [2024-06-14 14:10:00,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559475536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:00,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:00,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623661398] [2024-06-14 14:10:00,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:00,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:00,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:00,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:00,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:00,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:10:00,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 555 transitions, 10174 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:00,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:00,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:10:00,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:01,451 INFO L124 PetriNetUnfolderBase]: 2942/4917 cut-off events. [2024-06-14 14:10:01,451 INFO L125 PetriNetUnfolderBase]: For 539204/539204 co-relation queries the response was YES. [2024-06-14 14:10:01,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36336 conditions, 4917 events. 2942/4917 cut-off events. For 539204/539204 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 32025 event pairs, 457 based on Foata normal form. 6/4911 useless extension candidates. Maximal degree in co-relation 36138. Up to 2752 conditions per place. [2024-06-14 14:10:01,532 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 449 selfloop transitions, 145 changer transitions 0/600 dead transitions. [2024-06-14 14:10:01,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 600 transitions, 12036 flow [2024-06-14 14:10:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-14 14:10:01,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 14:10:01,533 INFO L175 Difference]: Start difference. First operand has 458 places, 555 transitions, 10174 flow. Second operand 10 states and 230 transitions. [2024-06-14 14:10:01,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 600 transitions, 12036 flow [2024-06-14 14:10:04,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 600 transitions, 11810 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:04,809 INFO L231 Difference]: Finished difference. Result has 461 places, 558 transitions, 10292 flow [2024-06-14 14:10:04,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9948, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10292, PETRI_PLACES=461, PETRI_TRANSITIONS=558} [2024-06-14 14:10:04,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-14 14:10:04,810 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 558 transitions, 10292 flow [2024-06-14 14:10:04,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:04,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:04,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:04,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 14:10:04,811 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:04,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:04,811 INFO L85 PathProgramCache]: Analyzing trace with hash -486631426, now seen corresponding path program 2 times [2024-06-14 14:10:04,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:04,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764596742] [2024-06-14 14:10:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:04,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:05,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:05,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764596742] [2024-06-14 14:10:05,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764596742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:05,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:05,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:05,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149243052] [2024-06-14 14:10:05,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:05,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:05,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:05,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:05,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:10:05,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 558 transitions, 10292 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:05,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:05,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:10:05,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:06,302 INFO L124 PetriNetUnfolderBase]: 2970/4974 cut-off events. [2024-06-14 14:10:06,302 INFO L125 PetriNetUnfolderBase]: For 547266/547269 co-relation queries the response was YES. [2024-06-14 14:10:06,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36730 conditions, 4974 events. 2970/4974 cut-off events. For 547266/547269 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 32566 event pairs, 451 based on Foata normal form. 8/4980 useless extension candidates. Maximal degree in co-relation 36531. Up to 4271 conditions per place. [2024-06-14 14:10:06,385 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 530 selfloop transitions, 55 changer transitions 0/591 dead transitions. [2024-06-14 14:10:06,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 591 transitions, 11584 flow [2024-06-14 14:10:06,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 14:10:06,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:10:06,386 INFO L175 Difference]: Start difference. First operand has 461 places, 558 transitions, 10292 flow. Second operand 8 states and 180 transitions. [2024-06-14 14:10:06,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 591 transitions, 11584 flow [2024-06-14 14:10:10,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 591 transitions, 11402 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:10,259 INFO L231 Difference]: Finished difference. Result has 464 places, 561 transitions, 10266 flow [2024-06-14 14:10:10,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10122, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10266, PETRI_PLACES=464, PETRI_TRANSITIONS=561} [2024-06-14 14:10:10,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-14 14:10:10,260 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 561 transitions, 10266 flow [2024-06-14 14:10:10,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:10,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:10,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:10,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 14:10:10,261 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:10,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:10,261 INFO L85 PathProgramCache]: Analyzing trace with hash -486631240, now seen corresponding path program 1 times [2024-06-14 14:10:10,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:10,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704875856] [2024-06-14 14:10:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:10,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:10,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:10,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704875856] [2024-06-14 14:10:10,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704875856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:10,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:10,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:10,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873600132] [2024-06-14 14:10:10,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:10,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:10,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:10,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:10,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:10:10,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 561 transitions, 10266 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:10,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:10,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:10:10,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:11,814 INFO L124 PetriNetUnfolderBase]: 3023/5065 cut-off events. [2024-06-14 14:10:11,815 INFO L125 PetriNetUnfolderBase]: For 600633/600636 co-relation queries the response was YES. [2024-06-14 14:10:11,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38036 conditions, 5065 events. 3023/5065 cut-off events. For 600633/600636 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 33245 event pairs, 444 based on Foata normal form. 8/5071 useless extension candidates. Maximal degree in co-relation 37835. Up to 3507 conditions per place. [2024-06-14 14:10:11,901 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 486 selfloop transitions, 109 changer transitions 0/601 dead transitions. [2024-06-14 14:10:11,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 601 transitions, 12140 flow [2024-06-14 14:10:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:11,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 14:10:11,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 14:10:11,902 INFO L175 Difference]: Start difference. First operand has 464 places, 561 transitions, 10266 flow. Second operand 8 states and 192 transitions. [2024-06-14 14:10:11,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 601 transitions, 12140 flow [2024-06-14 14:10:16,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 601 transitions, 12030 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:16,324 INFO L231 Difference]: Finished difference. Result has 467 places, 563 transitions, 10422 flow [2024-06-14 14:10:16,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10156, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10422, PETRI_PLACES=467, PETRI_TRANSITIONS=563} [2024-06-14 14:10:16,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-14 14:10:16,325 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 563 transitions, 10422 flow [2024-06-14 14:10:16,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:16,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:16,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:16,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 14:10:16,326 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:16,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:16,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1702271288, now seen corresponding path program 2 times [2024-06-14 14:10:16,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:16,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250169546] [2024-06-14 14:10:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:16,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:16,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:16,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250169546] [2024-06-14 14:10:16,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250169546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:16,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:16,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:16,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466174701] [2024-06-14 14:10:16,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:16,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:16,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:16,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:16,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:16,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:10:16,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 563 transitions, 10422 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:16,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:16,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:10:16,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:17,806 INFO L124 PetriNetUnfolderBase]: 3043/5097 cut-off events. [2024-06-14 14:10:17,806 INFO L125 PetriNetUnfolderBase]: For 611004/611007 co-relation queries the response was YES. [2024-06-14 14:10:17,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38723 conditions, 5097 events. 3043/5097 cut-off events. For 611004/611007 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 33460 event pairs, 440 based on Foata normal form. 8/5103 useless extension candidates. Maximal degree in co-relation 38521. Up to 3519 conditions per place. [2024-06-14 14:10:17,889 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 484 selfloop transitions, 110 changer transitions 0/600 dead transitions. [2024-06-14 14:10:17,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 600 transitions, 12274 flow [2024-06-14 14:10:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:10:17,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 14:10:17,890 INFO L175 Difference]: Start difference. First operand has 467 places, 563 transitions, 10422 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:10:17,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 600 transitions, 12274 flow [2024-06-14 14:10:21,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 600 transitions, 12112 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 14:10:21,982 INFO L231 Difference]: Finished difference. Result has 470 places, 564 transitions, 10510 flow [2024-06-14 14:10:21,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10263, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10510, PETRI_PLACES=470, PETRI_TRANSITIONS=564} [2024-06-14 14:10:21,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-14 14:10:21,983 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 564 transitions, 10510 flow [2024-06-14 14:10:21,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:21,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:21,983 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, 1, 1] [2024-06-14 14:10:21,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 14:10:21,983 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:21,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:21,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1071813866, now seen corresponding path program 3 times [2024-06-14 14:10:21,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:21,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230188305] [2024-06-14 14:10:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:21,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:22,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:22,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230188305] [2024-06-14 14:10:22,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230188305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:22,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:22,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:22,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256421711] [2024-06-14 14:10:22,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:22,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:22,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:22,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:22,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:10:22,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 564 transitions, 10510 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:22,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:22,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:10:22,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:23,788 INFO L124 PetriNetUnfolderBase]: 3063/5133 cut-off events. [2024-06-14 14:10:23,788 INFO L125 PetriNetUnfolderBase]: For 622284/622287 co-relation queries the response was YES. [2024-06-14 14:10:23,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39108 conditions, 5133 events. 3063/5133 cut-off events. For 622284/622287 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33822 event pairs, 447 based on Foata normal form. 8/5139 useless extension candidates. Maximal degree in co-relation 38905. Up to 4146 conditions per place. [2024-06-14 14:10:23,860 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 539 selfloop transitions, 59 changer transitions 0/604 dead transitions. [2024-06-14 14:10:23,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 604 transitions, 12090 flow [2024-06-14 14:10:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 14:10:23,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-14 14:10:23,862 INFO L175 Difference]: Start difference. First operand has 470 places, 564 transitions, 10510 flow. Second operand 8 states and 190 transitions. [2024-06-14 14:10:23,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 604 transitions, 12090 flow [2024-06-14 14:10:28,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 604 transitions, 11872 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:28,846 INFO L231 Difference]: Finished difference. Result has 474 places, 565 transitions, 10447 flow [2024-06-14 14:10:28,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10294, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10447, PETRI_PLACES=474, PETRI_TRANSITIONS=565} [2024-06-14 14:10:28,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-14 14:10:28,847 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 565 transitions, 10447 flow [2024-06-14 14:10:28,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:28,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:28,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:28,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 14:10:28,847 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:28,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:28,847 INFO L85 PathProgramCache]: Analyzing trace with hash -309262570, now seen corresponding path program 3 times [2024-06-14 14:10:28,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:28,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696742229] [2024-06-14 14:10:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:28,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:29,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:29,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696742229] [2024-06-14 14:10:29,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696742229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:29,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:29,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:29,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175483472] [2024-06-14 14:10:29,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:29,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:29,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:29,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:10:29,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 565 transitions, 10447 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:29,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:29,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:10:29,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:30,320 INFO L124 PetriNetUnfolderBase]: 3050/5114 cut-off events. [2024-06-14 14:10:30,320 INFO L125 PetriNetUnfolderBase]: For 572131/572134 co-relation queries the response was YES. [2024-06-14 14:10:30,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38011 conditions, 5114 events. 3050/5114 cut-off events. For 572131/572134 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33642 event pairs, 464 based on Foata normal form. 8/5120 useless extension candidates. Maximal degree in co-relation 37807. Up to 3545 conditions per place. [2024-06-14 14:10:30,403 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 489 selfloop transitions, 101 changer transitions 0/596 dead transitions. [2024-06-14 14:10:30,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 596 transitions, 11997 flow [2024-06-14 14:10:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:10:30,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 14:10:30,404 INFO L175 Difference]: Start difference. First operand has 474 places, 565 transitions, 10447 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:10:30,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 596 transitions, 11997 flow [2024-06-14 14:10:35,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 596 transitions, 11860 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:35,541 INFO L231 Difference]: Finished difference. Result has 474 places, 565 transitions, 10520 flow [2024-06-14 14:10:35,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10314, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10520, PETRI_PLACES=474, PETRI_TRANSITIONS=565} [2024-06-14 14:10:35,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-14 14:10:35,541 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 565 transitions, 10520 flow [2024-06-14 14:10:35,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:35,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:35,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:35,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 14:10:35,542 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:35,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:35,542 INFO L85 PathProgramCache]: Analyzing trace with hash 551800594, now seen corresponding path program 4 times [2024-06-14 14:10:35,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:35,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968029465] [2024-06-14 14:10:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:35,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:35,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:35,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968029465] [2024-06-14 14:10:35,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968029465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:35,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:35,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:35,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694303039] [2024-06-14 14:10:35,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:35,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:35,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:35,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:35,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:10:35,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 565 transitions, 10520 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:35,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:35,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:10:35,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:37,110 INFO L124 PetriNetUnfolderBase]: 3103/5189 cut-off events. [2024-06-14 14:10:37,111 INFO L125 PetriNetUnfolderBase]: For 613845/613845 co-relation queries the response was YES. [2024-06-14 14:10:37,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39241 conditions, 5189 events. 3103/5189 cut-off events. For 613845/613845 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 34211 event pairs, 594 based on Foata normal form. 6/5185 useless extension candidates. Maximal degree in co-relation 39037. Up to 4018 conditions per place. [2024-06-14 14:10:37,201 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 451 selfloop transitions, 151 changer transitions 0/608 dead transitions. [2024-06-14 14:10:37,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 608 transitions, 12140 flow [2024-06-14 14:10:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:10:37,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:10:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-14 14:10:37,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549889135254989 [2024-06-14 14:10:37,202 INFO L175 Difference]: Start difference. First operand has 474 places, 565 transitions, 10520 flow. Second operand 11 states and 248 transitions. [2024-06-14 14:10:37,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 608 transitions, 12140 flow [2024-06-14 14:10:42,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 608 transitions, 11799 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:42,169 INFO L231 Difference]: Finished difference. Result has 479 places, 567 transitions, 10523 flow [2024-06-14 14:10:42,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10179, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10523, PETRI_PLACES=479, PETRI_TRANSITIONS=567} [2024-06-14 14:10:42,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-14 14:10:42,170 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 567 transitions, 10523 flow [2024-06-14 14:10:42,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:42,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:42,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:42,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 14:10:42,170 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:42,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:42,170 INFO L85 PathProgramCache]: Analyzing trace with hash 551920564, now seen corresponding path program 5 times [2024-06-14 14:10:42,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:42,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777658546] [2024-06-14 14:10:42,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:42,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:42,498 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 14:10:42,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:42,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777658546] [2024-06-14 14:10:42,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777658546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:42,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:42,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:42,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049331247] [2024-06-14 14:10:42,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:42,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:42,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:42,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:42,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:42,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:10:42,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 567 transitions, 10523 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:42,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:42,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:10:42,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:43,724 INFO L124 PetriNetUnfolderBase]: 3090/5180 cut-off events. [2024-06-14 14:10:43,724 INFO L125 PetriNetUnfolderBase]: For 575018/575021 co-relation queries the response was YES. [2024-06-14 14:10:43,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37817 conditions, 5180 events. 3090/5180 cut-off events. For 575018/575021 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 34254 event pairs, 602 based on Foata normal form. 8/5184 useless extension candidates. Maximal degree in co-relation 37613. Up to 4505 conditions per place. [2024-06-14 14:10:43,810 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 536 selfloop transitions, 55 changer transitions 0/597 dead transitions. [2024-06-14 14:10:43,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 597 transitions, 11789 flow [2024-06-14 14:10:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:10:43,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 14:10:43,811 INFO L175 Difference]: Start difference. First operand has 479 places, 567 transitions, 10523 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:10:43,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 597 transitions, 11789 flow [2024-06-14 14:10:48,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 597 transitions, 11477 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:48,226 INFO L231 Difference]: Finished difference. Result has 478 places, 567 transitions, 10327 flow [2024-06-14 14:10:48,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10211, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10327, PETRI_PLACES=478, PETRI_TRANSITIONS=567} [2024-06-14 14:10:48,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-14 14:10:48,227 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 567 transitions, 10327 flow [2024-06-14 14:10:48,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:48,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:48,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:48,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 14:10:48,227 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:48,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash 551920750, now seen corresponding path program 4 times [2024-06-14 14:10:48,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:48,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038728448] [2024-06-14 14:10:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:48,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:48,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:48,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038728448] [2024-06-14 14:10:48,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038728448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:48,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:48,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:48,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355646183] [2024-06-14 14:10:48,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:48,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:48,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:48,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:48,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:10:48,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 567 transitions, 10327 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:48,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:48,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:10:48,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:49,943 INFO L124 PetriNetUnfolderBase]: 3077/5154 cut-off events. [2024-06-14 14:10:49,943 INFO L125 PetriNetUnfolderBase]: For 532187/532190 co-relation queries the response was YES. [2024-06-14 14:10:50,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36644 conditions, 5154 events. 3077/5154 cut-off events. For 532187/532190 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 33982 event pairs, 617 based on Foata normal form. 8/5153 useless extension candidates. Maximal degree in co-relation 36439. Up to 4332 conditions per place. [2024-06-14 14:10:50,016 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 491 selfloop transitions, 100 changer transitions 0/597 dead transitions. [2024-06-14 14:10:50,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 597 transitions, 11615 flow [2024-06-14 14:10:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:10:50,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 14:10:50,017 INFO L175 Difference]: Start difference. First operand has 478 places, 567 transitions, 10327 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:10:50,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 597 transitions, 11615 flow [2024-06-14 14:10:54,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 597 transitions, 11495 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:54,074 INFO L231 Difference]: Finished difference. Result has 478 places, 567 transitions, 10411 flow [2024-06-14 14:10:54,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10207, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10411, PETRI_PLACES=478, PETRI_TRANSITIONS=567} [2024-06-14 14:10:54,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-14 14:10:54,075 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 567 transitions, 10411 flow [2024-06-14 14:10:54,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:54,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:54,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:54,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 14:10:54,076 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:54,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:54,076 INFO L85 PathProgramCache]: Analyzing trace with hash 923660050, now seen corresponding path program 6 times [2024-06-14 14:10:54,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:54,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394522957] [2024-06-14 14:10:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:54,386 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 14:10:54,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:54,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394522957] [2024-06-14 14:10:54,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394522957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:54,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:54,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:54,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527115415] [2024-06-14 14:10:54,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:54,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:54,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:54,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:54,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:54,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:10:54,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 567 transitions, 10411 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:54,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:54,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:10:54,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:55,595 INFO L124 PetriNetUnfolderBase]: 3130/5245 cut-off events. [2024-06-14 14:10:55,596 INFO L125 PetriNetUnfolderBase]: For 581906/581906 co-relation queries the response was YES. [2024-06-14 14:10:55,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38052 conditions, 5245 events. 3130/5245 cut-off events. For 581906/581906 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 34669 event pairs, 527 based on Foata normal form. 6/5247 useless extension candidates. Maximal degree in co-relation 37847. Up to 3891 conditions per place. [2024-06-14 14:10:55,678 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 449 selfloop transitions, 159 changer transitions 0/614 dead transitions. [2024-06-14 14:10:55,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 614 transitions, 12325 flow [2024-06-14 14:10:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:10:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:10:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-14 14:10:55,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587583148558758 [2024-06-14 14:10:55,679 INFO L175 Difference]: Start difference. First operand has 478 places, 567 transitions, 10411 flow. Second operand 11 states and 252 transitions. [2024-06-14 14:10:55,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 614 transitions, 12325 flow [2024-06-14 14:11:00,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 614 transitions, 11994 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:00,222 INFO L231 Difference]: Finished difference. Result has 481 places, 569 transitions, 10448 flow [2024-06-14 14:11:00,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10080, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10448, PETRI_PLACES=481, PETRI_TRANSITIONS=569} [2024-06-14 14:11:00,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-14 14:11:00,222 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 569 transitions, 10448 flow [2024-06-14 14:11:00,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:00,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:00,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:00,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 14:11:00,223 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:00,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:00,223 INFO L85 PathProgramCache]: Analyzing trace with hash 447568594, now seen corresponding path program 7 times [2024-06-14 14:11:00,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:00,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450048523] [2024-06-14 14:11:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:00,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:00,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:00,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450048523] [2024-06-14 14:11:00,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450048523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:00,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:00,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:00,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730798176] [2024-06-14 14:11:00,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:00,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:00,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:00,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:11:00,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 569 transitions, 10448 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:00,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:00,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:11:00,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:01,778 INFO L124 PetriNetUnfolderBase]: 3117/5223 cut-off events. [2024-06-14 14:11:01,778 INFO L125 PetriNetUnfolderBase]: For 541675/541678 co-relation queries the response was YES. [2024-06-14 14:11:01,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37020 conditions, 5223 events. 3117/5223 cut-off events. For 541675/541678 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 34527 event pairs, 520 based on Foata normal form. 8/5229 useless extension candidates. Maximal degree in co-relation 36815. Up to 4510 conditions per place. [2024-06-14 14:11:01,862 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 535 selfloop transitions, 61 changer transitions 0/602 dead transitions. [2024-06-14 14:11:01,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 602 transitions, 11732 flow [2024-06-14 14:11:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:01,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:01,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:11:01,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 14:11:01,863 INFO L175 Difference]: Start difference. First operand has 481 places, 569 transitions, 10448 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:11:01,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 602 transitions, 11732 flow [2024-06-14 14:11:05,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 602 transitions, 11564 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 14:11:05,222 INFO L231 Difference]: Finished difference. Result has 481 places, 569 transitions, 10408 flow [2024-06-14 14:11:05,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10280, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10408, PETRI_PLACES=481, PETRI_TRANSITIONS=569} [2024-06-14 14:11:05,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-14 14:11:05,222 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 569 transitions, 10408 flow [2024-06-14 14:11:05,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:05,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:05,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:05,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 14:11:05,223 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:05,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:05,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2085593782, now seen corresponding path program 8 times [2024-06-14 14:11:05,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:05,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323726433] [2024-06-14 14:11:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:05,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:05,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:05,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323726433] [2024-06-14 14:11:05,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323726433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:05,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:05,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:05,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213524711] [2024-06-14 14:11:05,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:05,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:05,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:05,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:05,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:05,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:11:05,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 569 transitions, 10408 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:05,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:05,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:11:05,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:06,771 INFO L124 PetriNetUnfolderBase]: 3191/5340 cut-off events. [2024-06-14 14:11:06,772 INFO L125 PetriNetUnfolderBase]: For 631250/631250 co-relation queries the response was YES. [2024-06-14 14:11:06,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38603 conditions, 5340 events. 3191/5340 cut-off events. For 631250/631250 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 35424 event pairs, 669 based on Foata normal form. 8/5344 useless extension candidates. Maximal degree in co-relation 38397. Up to 4412 conditions per place. [2024-06-14 14:11:06,857 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 460 selfloop transitions, 145 changer transitions 0/611 dead transitions. [2024-06-14 14:11:06,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 611 transitions, 12042 flow [2024-06-14 14:11:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-14 14:11:06,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 14:11:06,858 INFO L175 Difference]: Start difference. First operand has 481 places, 569 transitions, 10408 flow. Second operand 12 states and 260 transitions. [2024-06-14 14:11:06,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 611 transitions, 12042 flow [2024-06-14 14:11:11,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 611 transitions, 11926 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:11:11,403 INFO L231 Difference]: Finished difference. Result has 487 places, 571 transitions, 10622 flow [2024-06-14 14:11:11,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10294, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10622, PETRI_PLACES=487, PETRI_TRANSITIONS=571} [2024-06-14 14:11:11,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-14 14:11:11,404 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 571 transitions, 10622 flow [2024-06-14 14:11:11,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:11,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:11,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:11,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 14:11:11,404 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:11,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:11,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1065763120, now seen corresponding path program 9 times [2024-06-14 14:11:11,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:11,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945442899] [2024-06-14 14:11:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:11,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:11,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:11,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945442899] [2024-06-14 14:11:11,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945442899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:11,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:11,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:11,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73803238] [2024-06-14 14:11:11,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:11,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:11,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:11,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:11,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:11:11,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 571 transitions, 10622 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:11,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:11,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:11:11,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:13,107 INFO L124 PetriNetUnfolderBase]: 3265/5450 cut-off events. [2024-06-14 14:11:13,107 INFO L125 PetriNetUnfolderBase]: For 700926/700926 co-relation queries the response was YES. [2024-06-14 14:11:13,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40531 conditions, 5450 events. 3265/5450 cut-off events. For 700926/700926 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36203 event pairs, 695 based on Foata normal form. 8/5454 useless extension candidates. Maximal degree in co-relation 40324. Up to 4530 conditions per place. [2024-06-14 14:11:13,196 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 454 selfloop transitions, 156 changer transitions 0/616 dead transitions. [2024-06-14 14:11:13,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 616 transitions, 12278 flow [2024-06-14 14:11:13,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 265 transitions. [2024-06-14 14:11:13,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386178861788617 [2024-06-14 14:11:13,197 INFO L175 Difference]: Start difference. First operand has 487 places, 571 transitions, 10622 flow. Second operand 12 states and 265 transitions. [2024-06-14 14:11:13,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 616 transitions, 12278 flow [2024-06-14 14:11:18,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 616 transitions, 12042 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:18,663 INFO L231 Difference]: Finished difference. Result has 489 places, 573 transitions, 10740 flow [2024-06-14 14:11:18,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10386, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10740, PETRI_PLACES=489, PETRI_TRANSITIONS=573} [2024-06-14 14:11:18,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-14 14:11:18,664 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 573 transitions, 10740 flow [2024-06-14 14:11:18,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:18,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:18,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:18,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 14:11:18,664 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:18,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1836647960, now seen corresponding path program 10 times [2024-06-14 14:11:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:18,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525421250] [2024-06-14 14:11:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:18,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:19,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:19,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525421250] [2024-06-14 14:11:19,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525421250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:19,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:19,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:19,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373779476] [2024-06-14 14:11:19,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:19,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:19,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:19,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:19,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:19,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:11:19,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 573 transitions, 10740 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:19,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:19,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:11:19,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:20,563 INFO L124 PetriNetUnfolderBase]: 3293/5498 cut-off events. [2024-06-14 14:11:20,563 INFO L125 PetriNetUnfolderBase]: For 711672/711672 co-relation queries the response was YES. [2024-06-14 14:11:20,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41178 conditions, 5498 events. 3293/5498 cut-off events. For 711672/711672 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 36610 event pairs, 717 based on Foata normal form. 8/5502 useless extension candidates. Maximal degree in co-relation 40970. Up to 4736 conditions per place. [2024-06-14 14:11:20,642 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 449 selfloop transitions, 154 changer transitions 0/609 dead transitions. [2024-06-14 14:11:20,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 609 transitions, 12070 flow [2024-06-14 14:11:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-14 14:11:20,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 14:11:20,643 INFO L175 Difference]: Start difference. First operand has 489 places, 573 transitions, 10740 flow. Second operand 12 states and 258 transitions. [2024-06-14 14:11:20,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 609 transitions, 12070 flow [2024-06-14 14:11:25,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 609 transitions, 11884 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:25,247 INFO L231 Difference]: Finished difference. Result has 493 places, 574 transitions, 10889 flow [2024-06-14 14:11:25,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10558, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10889, PETRI_PLACES=493, PETRI_TRANSITIONS=574} [2024-06-14 14:11:25,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-14 14:11:25,247 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 574 transitions, 10889 flow [2024-06-14 14:11:25,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:25,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:25,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:25,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 14:11:25,248 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:25,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1951939130, now seen corresponding path program 11 times [2024-06-14 14:11:25,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:25,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675777631] [2024-06-14 14:11:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:25,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:25,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:25,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675777631] [2024-06-14 14:11:25,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675777631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:25,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:25,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:25,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171114380] [2024-06-14 14:11:25,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:25,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:25,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:25,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:25,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:11:25,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 574 transitions, 10889 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:25,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:25,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:11:25,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:26,891 INFO L124 PetriNetUnfolderBase]: 3275/5473 cut-off events. [2024-06-14 14:11:26,891 INFO L125 PetriNetUnfolderBase]: For 652757/652760 co-relation queries the response was YES. [2024-06-14 14:11:26,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40299 conditions, 5473 events. 3275/5473 cut-off events. For 652757/652760 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 36498 event pairs, 696 based on Foata normal form. 10/5481 useless extension candidates. Maximal degree in co-relation 40089. Up to 4778 conditions per place. [2024-06-14 14:11:26,976 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 536 selfloop transitions, 65 changer transitions 0/607 dead transitions. [2024-06-14 14:11:26,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 607 transitions, 12193 flow [2024-06-14 14:11:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:11:26,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 14:11:26,977 INFO L175 Difference]: Start difference. First operand has 493 places, 574 transitions, 10889 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:11:26,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 607 transitions, 12193 flow [2024-06-14 14:11:31,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 607 transitions, 11880 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:31,809 INFO L231 Difference]: Finished difference. Result has 490 places, 574 transitions, 10716 flow [2024-06-14 14:11:31,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10576, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10716, PETRI_PLACES=490, PETRI_TRANSITIONS=574} [2024-06-14 14:11:31,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-14 14:11:31,810 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 574 transitions, 10716 flow [2024-06-14 14:11:31,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:31,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:31,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:31,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 14:11:31,810 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:31,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1932613884, now seen corresponding path program 12 times [2024-06-14 14:11:31,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:31,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202180717] [2024-06-14 14:11:31,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:31,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:32,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202180717] [2024-06-14 14:11:32,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202180717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:32,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:32,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:32,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164827641] [2024-06-14 14:11:32,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:32,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:32,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:32,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:32,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:32,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:11:32,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 574 transitions, 10716 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:32,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:32,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:11:32,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:33,469 INFO L124 PetriNetUnfolderBase]: 3303/5516 cut-off events. [2024-06-14 14:11:33,470 INFO L125 PetriNetUnfolderBase]: For 660651/660651 co-relation queries the response was YES. [2024-06-14 14:11:33,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40363 conditions, 5516 events. 3303/5516 cut-off events. For 660651/660651 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 36778 event pairs, 713 based on Foata normal form. 8/5520 useless extension candidates. Maximal degree in co-relation 40152. Up to 4754 conditions per place. [2024-06-14 14:11:33,555 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 458 selfloop transitions, 143 changer transitions 0/607 dead transitions. [2024-06-14 14:11:33,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 607 transitions, 12030 flow [2024-06-14 14:11:33,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-14 14:11:33,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142276422764228 [2024-06-14 14:11:33,556 INFO L175 Difference]: Start difference. First operand has 490 places, 574 transitions, 10716 flow. Second operand 12 states and 253 transitions. [2024-06-14 14:11:33,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 607 transitions, 12030 flow [2024-06-14 14:11:39,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 607 transitions, 11907 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 14:11:39,228 INFO L231 Difference]: Finished difference. Result has 497 places, 575 transitions, 10902 flow [2024-06-14 14:11:39,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10593, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10902, PETRI_PLACES=497, PETRI_TRANSITIONS=575} [2024-06-14 14:11:39,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-14 14:11:39,228 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 575 transitions, 10902 flow [2024-06-14 14:11:39,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:39,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:39,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:39,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 14:11:39,229 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:39,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:39,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2075466082, now seen corresponding path program 13 times [2024-06-14 14:11:39,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:39,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918749937] [2024-06-14 14:11:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:39,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:39,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:39,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918749937] [2024-06-14 14:11:39,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918749937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:39,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:39,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:39,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345408178] [2024-06-14 14:11:39,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:39,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:39,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:39,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:39,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:39,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:11:39,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 575 transitions, 10902 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:39,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:39,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:11:39,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:41,064 INFO L124 PetriNetUnfolderBase]: 3331/5556 cut-off events. [2024-06-14 14:11:41,064 INFO L125 PetriNetUnfolderBase]: For 672082/672082 co-relation queries the response was YES. [2024-06-14 14:11:41,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40886 conditions, 5556 events. 3331/5556 cut-off events. For 672082/672082 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 37031 event pairs, 715 based on Foata normal form. 8/5560 useless extension candidates. Maximal degree in co-relation 40673. Up to 4798 conditions per place. [2024-06-14 14:11:41,144 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 135 changer transitions 0/604 dead transitions. [2024-06-14 14:11:41,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 604 transitions, 12202 flow [2024-06-14 14:11:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-14 14:11:41,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-06-14 14:11:41,145 INFO L175 Difference]: Start difference. First operand has 497 places, 575 transitions, 10902 flow. Second operand 11 states and 234 transitions. [2024-06-14 14:11:41,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 604 transitions, 12202 flow [2024-06-14 14:11:46,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 604 transitions, 11932 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:46,294 INFO L231 Difference]: Finished difference. Result has 499 places, 576 transitions, 10927 flow [2024-06-14 14:11:46,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10632, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10927, PETRI_PLACES=499, PETRI_TRANSITIONS=576} [2024-06-14 14:11:46,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-14 14:11:46,294 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 576 transitions, 10927 flow [2024-06-14 14:11:46,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:46,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:46,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:46,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 14:11:46,295 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:46,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:46,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1498560188, now seen corresponding path program 14 times [2024-06-14 14:11:46,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:46,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439739584] [2024-06-14 14:11:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:46,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:46,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:46,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439739584] [2024-06-14 14:11:46,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439739584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:46,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:46,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:46,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302066928] [2024-06-14 14:11:46,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:46,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:46,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:46,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:46,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:11:46,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 576 transitions, 10927 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:46,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:46,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:11:46,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:47,968 INFO L124 PetriNetUnfolderBase]: 3313/5535 cut-off events. [2024-06-14 14:11:47,968 INFO L125 PetriNetUnfolderBase]: For 609889/609892 co-relation queries the response was YES. [2024-06-14 14:11:48,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39744 conditions, 5535 events. 3313/5535 cut-off events. For 609889/609892 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 37020 event pairs, 696 based on Foata normal form. 10/5543 useless extension candidates. Maximal degree in co-relation 39530. Up to 4758 conditions per place. [2024-06-14 14:11:48,068 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 512 selfloop transitions, 88 changer transitions 0/606 dead transitions. [2024-06-14 14:11:48,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 606 transitions, 12221 flow [2024-06-14 14:11:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:11:48,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 14:11:48,069 INFO L175 Difference]: Start difference. First operand has 499 places, 576 transitions, 10927 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:11:48,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 606 transitions, 12221 flow [2024-06-14 14:11:52,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 606 transitions, 11927 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:52,631 INFO L231 Difference]: Finished difference. Result has 496 places, 576 transitions, 10819 flow [2024-06-14 14:11:52,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10633, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10819, PETRI_PLACES=496, PETRI_TRANSITIONS=576} [2024-06-14 14:11:52,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-14 14:11:52,631 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 576 transitions, 10819 flow [2024-06-14 14:11:52,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:52,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:52,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:52,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 14:11:52,632 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:52,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:52,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2130852126, now seen corresponding path program 1 times [2024-06-14 14:11:52,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:52,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392265440] [2024-06-14 14:11:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:52,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:52,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:52,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392265440] [2024-06-14 14:11:52,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392265440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:52,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:52,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:52,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127876473] [2024-06-14 14:11:52,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:52,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:52,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:52,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:52,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:53,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:11:53,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 576 transitions, 10819 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:53,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:53,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:11:53,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:54,440 INFO L124 PetriNetUnfolderBase]: 3366/5617 cut-off events. [2024-06-14 14:11:54,441 INFO L125 PetriNetUnfolderBase]: For 655914/655914 co-relation queries the response was YES. [2024-06-14 14:11:54,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41000 conditions, 5617 events. 3366/5617 cut-off events. For 655914/655914 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 37531 event pairs, 694 based on Foata normal form. 6/5615 useless extension candidates. Maximal degree in co-relation 40785. Up to 3943 conditions per place. [2024-06-14 14:11:54,529 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 453 selfloop transitions, 160 changer transitions 0/619 dead transitions. [2024-06-14 14:11:54,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 619 transitions, 12499 flow [2024-06-14 14:11:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-14 14:11:54,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432372505543237 [2024-06-14 14:11:54,530 INFO L175 Difference]: Start difference. First operand has 496 places, 576 transitions, 10819 flow. Second operand 11 states and 245 transitions. [2024-06-14 14:11:54,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 619 transitions, 12499 flow [2024-06-14 14:11:59,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 619 transitions, 12330 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:11:59,846 INFO L231 Difference]: Finished difference. Result has 502 places, 578 transitions, 11024 flow [2024-06-14 14:11:59,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10650, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11024, PETRI_PLACES=502, PETRI_TRANSITIONS=578} [2024-06-14 14:11:59,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-14 14:11:59,847 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 578 transitions, 11024 flow [2024-06-14 14:11:59,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:59,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:59,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:59,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 14:11:59,848 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:59,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:59,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2131150656, now seen corresponding path program 2 times [2024-06-14 14:11:59,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:59,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350014710] [2024-06-14 14:11:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:59,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:00,163 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 14:12:00,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:00,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350014710] [2024-06-14 14:12:00,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350014710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:00,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:00,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:00,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284615152] [2024-06-14 14:12:00,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:00,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:00,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:00,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:00,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:00,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:12:00,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 578 transitions, 11024 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:00,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:00,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:12:00,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:01,796 INFO L124 PetriNetUnfolderBase]: 3386/5648 cut-off events. [2024-06-14 14:12:01,796 INFO L125 PetriNetUnfolderBase]: For 667704/667704 co-relation queries the response was YES. [2024-06-14 14:12:01,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41676 conditions, 5648 events. 3386/5648 cut-off events. For 667704/667704 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 37830 event pairs, 666 based on Foata normal form. 6/5646 useless extension candidates. Maximal degree in co-relation 41460. Up to 3955 conditions per place. [2024-06-14 14:12:01,884 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 455 selfloop transitions, 157 changer transitions 0/618 dead transitions. [2024-06-14 14:12:01,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 618 transitions, 12686 flow [2024-06-14 14:12:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:12:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:12:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-14 14:12:01,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388026607538803 [2024-06-14 14:12:01,885 INFO L175 Difference]: Start difference. First operand has 502 places, 578 transitions, 11024 flow. Second operand 11 states and 243 transitions. [2024-06-14 14:12:01,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 618 transitions, 12686 flow [2024-06-14 14:12:06,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 618 transitions, 12406 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 14:12:07,006 INFO L231 Difference]: Finished difference. Result has 505 places, 579 transitions, 11089 flow [2024-06-14 14:12:07,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10756, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11089, PETRI_PLACES=505, PETRI_TRANSITIONS=579} [2024-06-14 14:12:07,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-14 14:12:07,007 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 579 transitions, 11089 flow [2024-06-14 14:12:07,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:07,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:07,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:07,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 14:12:07,007 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:07,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:07,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2131151028, now seen corresponding path program 1 times [2024-06-14 14:12:07,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:07,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019223280] [2024-06-14 14:12:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:07,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:07,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:07,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019223280] [2024-06-14 14:12:07,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019223280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:07,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:07,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:12:07,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979443110] [2024-06-14 14:12:07,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:07,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:12:07,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:07,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:12:07,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:12:07,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:12:07,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 579 transitions, 11089 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:07,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:07,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:12:07,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:08,928 INFO L124 PetriNetUnfolderBase]: 3647/6103 cut-off events. [2024-06-14 14:12:08,928 INFO L125 PetriNetUnfolderBase]: For 1225635/1225635 co-relation queries the response was YES. [2024-06-14 14:12:09,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48974 conditions, 6103 events. 3647/6103 cut-off events. For 1225635/1225635 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41431 event pairs, 810 based on Foata normal form. 30/6129 useless extension candidates. Maximal degree in co-relation 48756. Up to 4201 conditions per place. [2024-06-14 14:12:09,032 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 296 changer transitions 7/630 dead transitions. [2024-06-14 14:12:09,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 630 transitions, 12899 flow [2024-06-14 14:12:09,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:12:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:12:09,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 291 transitions. [2024-06-14 14:12:09,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459662288930581 [2024-06-14 14:12:09,033 INFO L175 Difference]: Start difference. First operand has 505 places, 579 transitions, 11089 flow. Second operand 13 states and 291 transitions. [2024-06-14 14:12:09,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 630 transitions, 12899 flow [2024-06-14 14:12:16,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 630 transitions, 12634 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:12:16,702 INFO L231 Difference]: Finished difference. Result has 510 places, 580 transitions, 11478 flow [2024-06-14 14:12:16,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11478, PETRI_PLACES=510, PETRI_TRANSITIONS=580} [2024-06-14 14:12:16,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-14 14:12:16,703 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 580 transitions, 11478 flow [2024-06-14 14:12:16,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:16,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:16,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:16,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 14:12:16,704 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:16,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash 101650018, now seen corresponding path program 3 times [2024-06-14 14:12:16,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:16,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688440734] [2024-06-14 14:12:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:16,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:17,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:17,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688440734] [2024-06-14 14:12:17,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688440734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:17,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:17,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:17,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970384042] [2024-06-14 14:12:17,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:17,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:17,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:17,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:17,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:17,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:12:17,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 580 transitions, 11478 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:17,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:17,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:12:17,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:18,553 INFO L124 PetriNetUnfolderBase]: 3617/6068 cut-off events. [2024-06-14 14:12:18,553 INFO L125 PetriNetUnfolderBase]: For 1018606/1018606 co-relation queries the response was YES. [2024-06-14 14:12:18,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48990 conditions, 6068 events. 3617/6068 cut-off events. For 1018606/1018606 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 41246 event pairs, 881 based on Foata normal form. 6/6066 useless extension candidates. Maximal degree in co-relation 48771. Up to 5130 conditions per place. [2024-06-14 14:12:18,657 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 467 selfloop transitions, 139 changer transitions 0/612 dead transitions. [2024-06-14 14:12:18,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 612 transitions, 12807 flow [2024-06-14 14:12:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:12:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:12:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:12:18,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 14:12:18,658 INFO L175 Difference]: Start difference. First operand has 510 places, 580 transitions, 11478 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:12:18,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 612 transitions, 12807 flow [2024-06-14 14:12:26,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 612 transitions, 12180 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-06-14 14:12:26,567 INFO L231 Difference]: Finished difference. Result has 510 places, 581 transitions, 11151 flow [2024-06-14 14:12:26,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10851, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11151, PETRI_PLACES=510, PETRI_TRANSITIONS=581} [2024-06-14 14:12:26,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-14 14:12:26,568 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 581 transitions, 11151 flow [2024-06-14 14:12:26,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:26,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:26,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:26,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 14:12:26,568 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:26,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:26,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2075250508, now seen corresponding path program 2 times [2024-06-14 14:12:26,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:26,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156032314] [2024-06-14 14:12:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:26,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:26,872 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 14:12:26,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:26,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156032314] [2024-06-14 14:12:26,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156032314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:26,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:26,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:12:26,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259898429] [2024-06-14 14:12:26,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:26,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:12:26,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:26,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:12:26,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:12:26,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:12:26,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 581 transitions, 11151 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:26,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:26,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:12:26,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:28,500 INFO L124 PetriNetUnfolderBase]: 3878/6505 cut-off events. [2024-06-14 14:12:28,500 INFO L125 PetriNetUnfolderBase]: For 1585746/1585746 co-relation queries the response was YES. [2024-06-14 14:12:28,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55245 conditions, 6505 events. 3878/6505 cut-off events. For 1585746/1585746 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 44678 event pairs, 974 based on Foata normal form. 30/6531 useless extension candidates. Maximal degree in co-relation 55026. Up to 4944 conditions per place. [2024-06-14 14:12:28,612 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 325 selfloop transitions, 290 changer transitions 4/625 dead transitions. [2024-06-14 14:12:28,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 625 transitions, 12895 flow [2024-06-14 14:12:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:12:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:12:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-06-14 14:12:28,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347091932457786 [2024-06-14 14:12:28,613 INFO L175 Difference]: Start difference. First operand has 510 places, 581 transitions, 11151 flow. Second operand 13 states and 285 transitions. [2024-06-14 14:12:28,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 625 transitions, 12895 flow [2024-06-14 14:12:39,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 625 transitions, 12599 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:12:39,319 INFO L231 Difference]: Finished difference. Result has 513 places, 582 transitions, 11476 flow [2024-06-14 14:12:39,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10855, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11476, PETRI_PLACES=513, PETRI_TRANSITIONS=582} [2024-06-14 14:12:39,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-14 14:12:39,319 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 582 transitions, 11476 flow [2024-06-14 14:12:39,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:39,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:39,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:39,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 14:12:39,320 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:39,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:39,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2075102638, now seen corresponding path program 3 times [2024-06-14 14:12:39,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:39,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749857506] [2024-06-14 14:12:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:39,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:39,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:39,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749857506] [2024-06-14 14:12:39,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749857506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:39,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:39,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:12:39,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647643073] [2024-06-14 14:12:39,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:39,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:12:39,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:39,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:12:39,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:12:39,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:12:39,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 582 transitions, 11476 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:39,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:39,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:12:39,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:41,297 INFO L124 PetriNetUnfolderBase]: 3779/6354 cut-off events. [2024-06-14 14:12:41,297 INFO L125 PetriNetUnfolderBase]: For 1318656/1318656 co-relation queries the response was YES. [2024-06-14 14:12:41,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50174 conditions, 6354 events. 3779/6354 cut-off events. For 1318656/1318656 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 43673 event pairs, 975 based on Foata normal form. 34/6384 useless extension candidates. Maximal degree in co-relation 49954. Up to 5084 conditions per place. [2024-06-14 14:12:41,411 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 287 changer transitions 3/617 dead transitions. [2024-06-14 14:12:41,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 617 transitions, 12812 flow [2024-06-14 14:12:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:12:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:12:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 278 transitions. [2024-06-14 14:12:41,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215759849906192 [2024-06-14 14:12:41,412 INFO L175 Difference]: Start difference. First operand has 513 places, 582 transitions, 11476 flow. Second operand 13 states and 278 transitions. [2024-06-14 14:12:41,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 617 transitions, 12812 flow [2024-06-14 14:12:49,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 617 transitions, 12596 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 14:12:49,732 INFO L231 Difference]: Finished difference. Result has 518 places, 581 transitions, 11826 flow [2024-06-14 14:12:49,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11260, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11826, PETRI_PLACES=518, PETRI_TRANSITIONS=581} [2024-06-14 14:12:49,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-14 14:12:49,732 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 581 transitions, 11826 flow [2024-06-14 14:12:49,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:49,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:49,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:49,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 14:12:49,733 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:49,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:49,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1504286012, now seen corresponding path program 4 times [2024-06-14 14:12:49,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:49,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491768633] [2024-06-14 14:12:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:49,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:50,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:50,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491768633] [2024-06-14 14:12:50,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491768633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:50,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:50,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:12:50,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197476987] [2024-06-14 14:12:50,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:50,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:12:50,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:12:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:12:50,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:12:50,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 581 transitions, 11826 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:50,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:50,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:12:50,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:51,739 INFO L124 PetriNetUnfolderBase]: 3873/6509 cut-off events. [2024-06-14 14:12:51,739 INFO L125 PetriNetUnfolderBase]: For 1339005/1339008 co-relation queries the response was YES. [2024-06-14 14:12:51,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51404 conditions, 6509 events. 3873/6509 cut-off events. For 1339005/1339008 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 44979 event pairs, 1016 based on Foata normal form. 36/6543 useless extension candidates. Maximal degree in co-relation 51182. Up to 5554 conditions per place. [2024-06-14 14:12:51,857 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 473 selfloop transitions, 131 changer transitions 4/614 dead transitions. [2024-06-14 14:12:51,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 614 transitions, 13186 flow [2024-06-14 14:12:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:12:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:12:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:12:51,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:12:51,858 INFO L175 Difference]: Start difference. First operand has 518 places, 581 transitions, 11826 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:12:51,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 614 transitions, 13186 flow [2024-06-14 14:13:00,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 614 transitions, 12603 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-14 14:13:00,915 INFO L231 Difference]: Finished difference. Result has 516 places, 580 transitions, 11518 flow [2024-06-14 14:13:00,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11243, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11518, PETRI_PLACES=516, PETRI_TRANSITIONS=580} [2024-06-14 14:13:00,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-14 14:13:00,915 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 580 transitions, 11518 flow [2024-06-14 14:13:00,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:00,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:00,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:00,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 14:13:00,916 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:00,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1653737298, now seen corresponding path program 5 times [2024-06-14 14:13:00,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:00,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12063321] [2024-06-14 14:13:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:00,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:01,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:01,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12063321] [2024-06-14 14:13:01,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12063321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:01,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:01,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:13:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890698672] [2024-06-14 14:13:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:01,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:13:01,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:13:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:13:01,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:13:01,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 580 transitions, 11518 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:01,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:01,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:13:01,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:02,991 INFO L124 PetriNetUnfolderBase]: 3965/6685 cut-off events. [2024-06-14 14:13:02,991 INFO L125 PetriNetUnfolderBase]: For 1354136/1354139 co-relation queries the response was YES. [2024-06-14 14:13:03,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52008 conditions, 6685 events. 3965/6685 cut-off events. For 1354136/1354139 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 46517 event pairs, 1070 based on Foata normal form. 36/6719 useless extension candidates. Maximal degree in co-relation 51785. Up to 5710 conditions per place. [2024-06-14 14:13:03,103 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 126 changer transitions 4/611 dead transitions. [2024-06-14 14:13:03,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 611 transitions, 12870 flow [2024-06-14 14:13:03,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:13:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:13:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:13:03,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 14:13:03,104 INFO L175 Difference]: Start difference. First operand has 516 places, 580 transitions, 11518 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:13:03,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 611 transitions, 12870 flow [2024-06-14 14:13:12,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 611 transitions, 12583 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 14:13:12,012 INFO L231 Difference]: Finished difference. Result has 516 places, 579 transitions, 11498 flow [2024-06-14 14:13:12,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11231, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11498, PETRI_PLACES=516, PETRI_TRANSITIONS=579} [2024-06-14 14:13:12,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-14 14:13:12,013 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 579 transitions, 11498 flow [2024-06-14 14:13:12,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:12,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:12,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:12,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 14:13:12,013 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:12,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1498775762, now seen corresponding path program 6 times [2024-06-14 14:13:12,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:12,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255950090] [2024-06-14 14:13:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:12,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:12,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:12,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255950090] [2024-06-14 14:13:12,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255950090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:12,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:12,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:13:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096327879] [2024-06-14 14:13:12,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:12,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:13:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:13:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:13:12,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:13:12,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 579 transitions, 11498 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:12,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:12,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:13:12,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:14,069 INFO L124 PetriNetUnfolderBase]: 4041/6810 cut-off events. [2024-06-14 14:13:14,069 INFO L125 PetriNetUnfolderBase]: For 1333231/1333234 co-relation queries the response was YES. [2024-06-14 14:13:14,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52562 conditions, 6810 events. 4041/6810 cut-off events. For 1333231/1333234 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 47389 event pairs, 1023 based on Foata normal form. 32/6840 useless extension candidates. Maximal degree in co-relation 52338. Up to 5087 conditions per place. [2024-06-14 14:13:14,192 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 479 selfloop transitions, 129 changer transitions 6/620 dead transitions. [2024-06-14 14:13:14,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 620 transitions, 13210 flow [2024-06-14 14:13:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:13:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:13:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:13:14,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-14 14:13:14,193 INFO L175 Difference]: Start difference. First operand has 516 places, 579 transitions, 11498 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:13:14,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 620 transitions, 13210 flow [2024-06-14 14:13:22,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 620 transitions, 12931 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 14:13:22,390 INFO L231 Difference]: Finished difference. Result has 518 places, 577 transitions, 11401 flow [2024-06-14 14:13:22,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11219, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11401, PETRI_PLACES=518, PETRI_TRANSITIONS=577} [2024-06-14 14:13:22,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-14 14:13:22,390 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 577 transitions, 11401 flow [2024-06-14 14:13:22,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:22,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:22,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:22,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 14:13:22,391 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:22,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:22,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1879064280, now seen corresponding path program 4 times [2024-06-14 14:13:22,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:22,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394789903] [2024-06-14 14:13:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:22,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:22,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:22,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394789903] [2024-06-14 14:13:22,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394789903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:22,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:22,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:13:22,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370394459] [2024-06-14 14:13:22,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:22,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:13:22,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:22,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:13:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:13:22,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:13:22,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 577 transitions, 11401 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:22,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:22,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:13:22,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:24,351 INFO L124 PetriNetUnfolderBase]: 3986/6722 cut-off events. [2024-06-14 14:13:24,351 INFO L125 PetriNetUnfolderBase]: For 1039995/1039998 co-relation queries the response was YES. [2024-06-14 14:13:24,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51146 conditions, 6722 events. 3986/6722 cut-off events. For 1039995/1039998 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 46855 event pairs, 984 based on Foata normal form. 8/6720 useless extension candidates. Maximal degree in co-relation 50921. Up to 5474 conditions per place. [2024-06-14 14:13:24,466 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 512 selfloop transitions, 92 changer transitions 0/610 dead transitions. [2024-06-14 14:13:24,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 610 transitions, 12719 flow [2024-06-14 14:13:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:13:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:13:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:13:24,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 14:13:24,467 INFO L175 Difference]: Start difference. First operand has 518 places, 577 transitions, 11401 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:13:24,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 610 transitions, 12719 flow [2024-06-14 14:13:32,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 610 transitions, 12204 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 14:13:32,388 INFO L231 Difference]: Finished difference. Result has 518 places, 577 transitions, 11080 flow [2024-06-14 14:13:32,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10886, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11080, PETRI_PLACES=518, PETRI_TRANSITIONS=577} [2024-06-14 14:13:32,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-14 14:13:32,389 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 577 transitions, 11080 flow [2024-06-14 14:13:32,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:32,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:32,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:32,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:13:32,389 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:32,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:32,389 INFO L85 PathProgramCache]: Analyzing trace with hash -402512074, now seen corresponding path program 1 times [2024-06-14 14:13:32,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:32,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628427202] [2024-06-14 14:13:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:32,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:32,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:32,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628427202] [2024-06-14 14:13:32,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628427202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:32,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:32,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:13:32,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326210181] [2024-06-14 14:13:32,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:32,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:13:32,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:13:32,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:13:32,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:13:32,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 577 transitions, 11080 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:32,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:32,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:13:32,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:34,563 INFO L124 PetriNetUnfolderBase]: 4074/6898 cut-off events. [2024-06-14 14:13:34,563 INFO L125 PetriNetUnfolderBase]: For 1303387/1303390 co-relation queries the response was YES. [2024-06-14 14:13:34,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51180 conditions, 6898 events. 4074/6898 cut-off events. For 1303387/1303390 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 48345 event pairs, 1095 based on Foata normal form. 32/6928 useless extension candidates. Maximal degree in co-relation 50955. Up to 5565 conditions per place. [2024-06-14 14:13:34,688 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 128 changer transitions 7/616 dead transitions. [2024-06-14 14:13:34,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 616 transitions, 12492 flow [2024-06-14 14:13:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-14 14:13:34,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-14 14:13:34,689 INFO L175 Difference]: Start difference. First operand has 518 places, 577 transitions, 11080 flow. Second operand 10 states and 228 transitions. [2024-06-14 14:13:34,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 616 transitions, 12492 flow [2024-06-14 14:13:42,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 616 transitions, 12249 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:13:42,306 INFO L231 Difference]: Finished difference. Result has 520 places, 576 transitions, 11102 flow [2024-06-14 14:13:42,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10837, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11102, PETRI_PLACES=520, PETRI_TRANSITIONS=576} [2024-06-14 14:13:42,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 478 predicate places. [2024-06-14 14:13:42,307 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 576 transitions, 11102 flow [2024-06-14 14:13:42,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:42,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:42,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:42,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:13:42,308 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:42,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:42,308 INFO L85 PathProgramCache]: Analyzing trace with hash 420004882, now seen corresponding path program 7 times [2024-06-14 14:13:42,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:42,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755669426] [2024-06-14 14:13:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:42,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:42,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:42,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755669426] [2024-06-14 14:13:42,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755669426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:42,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:42,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:13:42,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742365583] [2024-06-14 14:13:42,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:42,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:13:42,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:42,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:13:42,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:13:42,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:13:42,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 576 transitions, 11102 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:42,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:42,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:13:42,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:44,728 INFO L124 PetriNetUnfolderBase]: 4146/7020 cut-off events. [2024-06-14 14:13:44,729 INFO L125 PetriNetUnfolderBase]: For 1350422/1350425 co-relation queries the response was YES. [2024-06-14 14:13:44,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51782 conditions, 7020 events. 4146/7020 cut-off events. For 1350422/1350425 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 49473 event pairs, 1185 based on Foata normal form. 36/7054 useless extension candidates. Maximal degree in co-relation 51557. Up to 5911 conditions per place. [2024-06-14 14:13:44,842 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 427 selfloop transitions, 170 changer transitions 3/606 dead transitions. [2024-06-14 14:13:44,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 606 transitions, 12440 flow [2024-06-14 14:13:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-14 14:13:44,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-14 14:13:44,844 INFO L175 Difference]: Start difference. First operand has 520 places, 576 transitions, 11102 flow. Second operand 10 states and 221 transitions. [2024-06-14 14:13:44,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 606 transitions, 12440 flow [2024-06-14 14:13:52,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 606 transitions, 12144 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 14:13:52,561 INFO L231 Difference]: Finished difference. Result has 522 places, 576 transitions, 11179 flow [2024-06-14 14:13:52,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10806, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11179, PETRI_PLACES=522, PETRI_TRANSITIONS=576} [2024-06-14 14:13:52,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-14 14:13:52,561 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 576 transitions, 11179 flow [2024-06-14 14:13:52,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:52,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:52,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:52,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:13:52,562 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:52,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:52,562 INFO L85 PathProgramCache]: Analyzing trace with hash 871060120, now seen corresponding path program 2 times [2024-06-14 14:13:52,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:52,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537752799] [2024-06-14 14:13:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:52,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:53,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:53,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537752799] [2024-06-14 14:13:53,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537752799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:53,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:53,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:13:53,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279005234] [2024-06-14 14:13:53,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:53,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:13:53,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:53,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:13:53,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:13:53,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:13:53,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 576 transitions, 11179 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:53,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:53,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:13:53,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:54,873 INFO L124 PetriNetUnfolderBase]: 4224/7174 cut-off events. [2024-06-14 14:13:54,873 INFO L125 PetriNetUnfolderBase]: For 1324025/1324028 co-relation queries the response was YES. [2024-06-14 14:13:54,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52440 conditions, 7174 events. 4224/7174 cut-off events. For 1324025/1324028 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 50842 event pairs, 1185 based on Foata normal form. 32/7204 useless extension candidates. Maximal degree in co-relation 52214. Up to 5865 conditions per place. [2024-06-14 14:13:54,996 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 170 changer transitions 8/613 dead transitions. [2024-06-14 14:13:54,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 613 transitions, 12581 flow [2024-06-14 14:13:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:13:54,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:13:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-14 14:13:54,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 14:13:54,997 INFO L175 Difference]: Start difference. First operand has 522 places, 576 transitions, 11179 flow. Second operand 11 states and 242 transitions. [2024-06-14 14:13:54,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 613 transitions, 12581 flow [2024-06-14 14:14:03,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 613 transitions, 12212 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 14:14:03,495 INFO L231 Difference]: Finished difference. Result has 525 places, 574 transitions, 11157 flow [2024-06-14 14:14:03,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10810, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11157, PETRI_PLACES=525, PETRI_TRANSITIONS=574} [2024-06-14 14:14:03,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-14 14:14:03,496 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 574 transitions, 11157 flow [2024-06-14 14:14:03,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:03,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:03,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:03,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:14:03,496 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:03,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:03,496 INFO L85 PathProgramCache]: Analyzing trace with hash -582180952, now seen corresponding path program 3 times [2024-06-14 14:14:03,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:03,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867855759] [2024-06-14 14:14:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:03,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:03,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:03,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867855759] [2024-06-14 14:14:03,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867855759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:03,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:03,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:14:03,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696337157] [2024-06-14 14:14:03,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:03,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:14:03,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:03,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:14:03,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:14:04,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:14:04,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 574 transitions, 11157 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:04,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:04,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:14:04,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:06,451 INFO L124 PetriNetUnfolderBase]: 4309/7315 cut-off events. [2024-06-14 14:14:06,451 INFO L125 PetriNetUnfolderBase]: For 1711556/1711559 co-relation queries the response was YES. [2024-06-14 14:14:06,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58411 conditions, 7315 events. 4309/7315 cut-off events. For 1711556/1711559 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 51800 event pairs, 1230 based on Foata normal form. 32/7345 useless extension candidates. Maximal degree in co-relation 58184. Up to 4919 conditions per place. [2024-06-14 14:14:06,575 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 167 changer transitions 11/616 dead transitions. [2024-06-14 14:14:06,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 616 transitions, 12935 flow [2024-06-14 14:14:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:14:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:14:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-14 14:14:06,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-14 14:14:06,577 INFO L175 Difference]: Start difference. First operand has 525 places, 574 transitions, 11157 flow. Second operand 10 states and 229 transitions. [2024-06-14 14:14:06,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 616 transitions, 12935 flow [2024-06-14 14:14:17,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 616 transitions, 12549 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-14 14:14:17,431 INFO L231 Difference]: Finished difference. Result has 526 places, 570 transitions, 11103 flow [2024-06-14 14:14:17,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10771, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11103, PETRI_PLACES=526, PETRI_TRANSITIONS=570} [2024-06-14 14:14:17,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-14 14:14:17,432 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 570 transitions, 11103 flow [2024-06-14 14:14:17,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:17,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:17,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:17,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:14:17,433 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:17,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:17,433 INFO L85 PathProgramCache]: Analyzing trace with hash -437574754, now seen corresponding path program 15 times [2024-06-14 14:14:17,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:17,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563583554] [2024-06-14 14:14:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:17,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:17,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:17,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563583554] [2024-06-14 14:14:17,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563583554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:17,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:17,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:17,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839871932] [2024-06-14 14:14:17,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:17,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:17,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:17,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:17,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:14:17,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 570 transitions, 11103 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:17,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:17,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:14:17,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:20,180 INFO L124 PetriNetUnfolderBase]: 4168/7076 cut-off events. [2024-06-14 14:14:20,181 INFO L125 PetriNetUnfolderBase]: For 1495505/1495508 co-relation queries the response was YES. [2024-06-14 14:14:20,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57366 conditions, 7076 events. 4168/7076 cut-off events. For 1495505/1495508 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 50112 event pairs, 1239 based on Foata normal form. 10/7078 useless extension candidates. Maximal degree in co-relation 57138. Up to 6057 conditions per place. [2024-06-14 14:14:20,295 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 469 selfloop transitions, 133 changer transitions 0/608 dead transitions. [2024-06-14 14:14:20,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 608 transitions, 12749 flow [2024-06-14 14:14:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:14:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:14:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-14 14:14:20,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 14:14:20,296 INFO L175 Difference]: Start difference. First operand has 526 places, 570 transitions, 11103 flow. Second operand 12 states and 255 transitions. [2024-06-14 14:14:20,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 608 transitions, 12749 flow [2024-06-14 14:14:28,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 608 transitions, 12367 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 14:14:28,196 INFO L231 Difference]: Finished difference. Result has 530 places, 571 transitions, 11011 flow [2024-06-14 14:14:28,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10721, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11011, PETRI_PLACES=530, PETRI_TRANSITIONS=571} [2024-06-14 14:14:28,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-14 14:14:28,196 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 571 transitions, 11011 flow [2024-06-14 14:14:28,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:28,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:28,197 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, 1, 1] [2024-06-14 14:14:28,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:14:28,197 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:28,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:28,197 INFO L85 PathProgramCache]: Analyzing trace with hash -429003874, now seen corresponding path program 16 times [2024-06-14 14:14:28,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:28,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148219601] [2024-06-14 14:14:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:28,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:28,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:28,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148219601] [2024-06-14 14:14:28,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148219601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:28,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:28,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:28,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708654601] [2024-06-14 14:14:28,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:28,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:28,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:28,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:28,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:28,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:14:28,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 571 transitions, 11011 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:28,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:28,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:14:28,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:30,724 INFO L124 PetriNetUnfolderBase]: 4023/6829 cut-off events. [2024-06-14 14:14:30,724 INFO L125 PetriNetUnfolderBase]: For 1131483/1131486 co-relation queries the response was YES. [2024-06-14 14:14:30,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50862 conditions, 6829 events. 4023/6829 cut-off events. For 1131483/1131486 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 47970 event pairs, 1158 based on Foata normal form. 10/6831 useless extension candidates. Maximal degree in co-relation 50633. Up to 5992 conditions per place. [2024-06-14 14:14:30,828 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 464 selfloop transitions, 131 changer transitions 0/601 dead transitions. [2024-06-14 14:14:30,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 601 transitions, 12311 flow [2024-06-14 14:14:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:14:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:14:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-14 14:14:30,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-14 14:14:30,830 INFO L175 Difference]: Start difference. First operand has 530 places, 571 transitions, 11011 flow. Second operand 12 states and 248 transitions. [2024-06-14 14:14:30,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 601 transitions, 12311 flow [2024-06-14 14:14:37,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 601 transitions, 11847 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-14 14:14:37,355 INFO L231 Difference]: Finished difference. Result has 531 places, 572 transitions, 10838 flow [2024-06-14 14:14:37,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10555, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10838, PETRI_PLACES=531, PETRI_TRANSITIONS=572} [2024-06-14 14:14:37,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-14 14:14:37,356 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 572 transitions, 10838 flow [2024-06-14 14:14:37,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:37,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:37,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:37,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:14:37,356 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:37,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:37,356 INFO L85 PathProgramCache]: Analyzing trace with hash -142116544, now seen corresponding path program 17 times [2024-06-14 14:14:37,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:37,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297680912] [2024-06-14 14:14:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:37,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:37,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:37,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297680912] [2024-06-14 14:14:37,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297680912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:37,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:37,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421017431] [2024-06-14 14:14:37,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:37,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:37,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:37,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:37,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:37,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:14:37,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 572 transitions, 10838 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:37,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:37,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:14:37,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:39,751 INFO L124 PetriNetUnfolderBase]: 4051/6877 cut-off events. [2024-06-14 14:14:39,752 INFO L125 PetriNetUnfolderBase]: For 1144946/1144949 co-relation queries the response was YES. [2024-06-14 14:14:39,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50346 conditions, 6877 events. 4051/6877 cut-off events. For 1144946/1144949 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 48338 event pairs, 1164 based on Foata normal form. 10/6879 useless extension candidates. Maximal degree in co-relation 50118. Up to 6036 conditions per place. [2024-06-14 14:14:39,876 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 465 selfloop transitions, 127 changer transitions 0/598 dead transitions. [2024-06-14 14:14:39,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 598 transitions, 12116 flow [2024-06-14 14:14:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:14:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:14:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-14 14:14:39,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 14:14:39,877 INFO L175 Difference]: Start difference. First operand has 531 places, 572 transitions, 10838 flow. Second operand 11 states and 231 transitions. [2024-06-14 14:14:39,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 598 transitions, 12116 flow [2024-06-14 14:14:47,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 598 transitions, 11802 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:14:48,006 INFO L231 Difference]: Finished difference. Result has 532 places, 573 transitions, 10801 flow [2024-06-14 14:14:48,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10524, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10801, PETRI_PLACES=532, PETRI_TRANSITIONS=573} [2024-06-14 14:14:48,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-14 14:14:48,007 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 573 transitions, 10801 flow [2024-06-14 14:14:48,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:48,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:48,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:48,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:14:48,007 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:48,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:48,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1002248512, now seen corresponding path program 18 times [2024-06-14 14:14:48,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:48,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235783076] [2024-06-14 14:14:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:48,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:48,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:48,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235783076] [2024-06-14 14:14:48,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235783076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:48,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:48,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:48,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402202798] [2024-06-14 14:14:48,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:48,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:48,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:48,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:48,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:14:48,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 573 transitions, 10801 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:48,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:48,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:14:48,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:50,307 INFO L124 PetriNetUnfolderBase]: 4079/6917 cut-off events. [2024-06-14 14:14:50,307 INFO L125 PetriNetUnfolderBase]: For 1159769/1159772 co-relation queries the response was YES. [2024-06-14 14:14:50,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50642 conditions, 6917 events. 4079/6917 cut-off events. For 1159769/1159772 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 48655 event pairs, 1166 based on Foata normal form. 10/6919 useless extension candidates. Maximal degree in co-relation 50413. Up to 6080 conditions per place. [2024-06-14 14:14:50,610 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 465 selfloop transitions, 124 changer transitions 0/595 dead transitions. [2024-06-14 14:14:50,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 595 transitions, 12065 flow [2024-06-14 14:14:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:14:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:14:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 14:14:50,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 14:14:50,612 INFO L175 Difference]: Start difference. First operand has 532 places, 573 transitions, 10801 flow. Second operand 10 states and 210 transitions. [2024-06-14 14:14:50,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 595 transitions, 12065 flow [2024-06-14 14:14:58,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 595 transitions, 11808 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:14:58,495 INFO L231 Difference]: Finished difference. Result has 533 places, 574 transitions, 10817 flow [2024-06-14 14:14:58,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10544, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10817, PETRI_PLACES=533, PETRI_TRANSITIONS=574} [2024-06-14 14:14:58,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-14 14:14:58,495 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 574 transitions, 10817 flow [2024-06-14 14:14:58,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:58,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:58,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:58,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 14:14:58,496 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:58,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash -332342818, now seen corresponding path program 19 times [2024-06-14 14:14:58,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:58,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445795522] [2024-06-14 14:14:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:58,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:58,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:58,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445795522] [2024-06-14 14:14:58,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445795522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:58,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:58,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:58,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584601931] [2024-06-14 14:14:58,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:58,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:58,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:58,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:14:58,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 574 transitions, 10817 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:58,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:58,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:14:58,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:00,740 INFO L124 PetriNetUnfolderBase]: 4061/6891 cut-off events. [2024-06-14 14:15:00,740 INFO L125 PetriNetUnfolderBase]: For 1083442/1083445 co-relation queries the response was YES. [2024-06-14 14:15:00,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49358 conditions, 6891 events. 4061/6891 cut-off events. For 1083442/1083445 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 48498 event pairs, 1164 based on Foata normal form. 10/6893 useless extension candidates. Maximal degree in co-relation 49128. Up to 6000 conditions per place. [2024-06-14 14:15:00,852 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 500 selfloop transitions, 95 changer transitions 0/601 dead transitions. [2024-06-14 14:15:00,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 601 transitions, 12093 flow [2024-06-14 14:15:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:15:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:15:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 14:15:00,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 14:15:00,853 INFO L175 Difference]: Start difference. First operand has 533 places, 574 transitions, 10817 flow. Second operand 7 states and 166 transitions. [2024-06-14 14:15:00,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 601 transitions, 12093 flow [2024-06-14 14:15:08,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 601 transitions, 11840 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:15:08,244 INFO L231 Difference]: Finished difference. Result has 533 places, 574 transitions, 10762 flow [2024-06-14 14:15:08,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10564, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10762, PETRI_PLACES=533, PETRI_TRANSITIONS=574} [2024-06-14 14:15:08,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-14 14:15:08,245 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 574 transitions, 10762 flow [2024-06-14 14:15:08,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:08,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:08,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:08,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 14:15:08,245 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:08,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1252620384, now seen corresponding path program 8 times [2024-06-14 14:15:08,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:08,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983460831] [2024-06-14 14:15:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:08,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:08,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:08,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983460831] [2024-06-14 14:15:08,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983460831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:08,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:08,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:15:08,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865768309] [2024-06-14 14:15:08,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:08,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:15:08,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:08,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:15:08,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:15:08,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:15:08,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 574 transitions, 10762 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:08,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:08,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:15:08,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:10,857 INFO L124 PetriNetUnfolderBase]: 4127/6992 cut-off events. [2024-06-14 14:15:10,857 INFO L125 PetriNetUnfolderBase]: For 1169690/1169690 co-relation queries the response was YES. [2024-06-14 14:15:10,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51644 conditions, 6992 events. 4127/6992 cut-off events. For 1169690/1169690 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 49322 event pairs, 1168 based on Foata normal form. 6/6991 useless extension candidates. Maximal degree in co-relation 51413. Up to 6095 conditions per place. [2024-06-14 14:15:10,978 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 477 selfloop transitions, 130 changer transitions 0/613 dead transitions. [2024-06-14 14:15:10,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 613 transitions, 12494 flow [2024-06-14 14:15:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:15:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:15:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-14 14:15:10,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 14:15:10,979 INFO L175 Difference]: Start difference. First operand has 533 places, 574 transitions, 10762 flow. Second operand 12 states and 260 transitions. [2024-06-14 14:15:10,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 613 transitions, 12494 flow [2024-06-14 14:15:18,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 613 transitions, 12289 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:15:18,933 INFO L231 Difference]: Finished difference. Result has 539 places, 576 transitions, 10915 flow [2024-06-14 14:15:18,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10557, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10915, PETRI_PLACES=539, PETRI_TRANSITIONS=576} [2024-06-14 14:15:18,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 497 predicate places. [2024-06-14 14:15:18,934 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 576 transitions, 10915 flow [2024-06-14 14:15:18,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:18,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:18,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:18,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 14:15:18,934 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:18,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:18,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1750681620, now seen corresponding path program 9 times [2024-06-14 14:15:18,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:18,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663413324] [2024-06-14 14:15:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:18,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:19,238 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 14:15:19,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:19,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663413324] [2024-06-14 14:15:19,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663413324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:19,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:19,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:15:19,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270902593] [2024-06-14 14:15:19,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:19,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:15:19,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:15:19,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:15:19,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:15:19,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 576 transitions, 10915 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:19,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:19,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:15:19,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:21,460 INFO L124 PetriNetUnfolderBase]: 4193/7094 cut-off events. [2024-06-14 14:15:21,460 INFO L125 PetriNetUnfolderBase]: For 1287667/1287667 co-relation queries the response was YES. [2024-06-14 14:15:21,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54155 conditions, 7094 events. 4193/7094 cut-off events. For 1287667/1287667 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 50070 event pairs, 1186 based on Foata normal form. 6/7093 useless extension candidates. Maximal degree in co-relation 53923. Up to 5899 conditions per place. [2024-06-14 14:15:21,581 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 314 changer transitions 0/612 dead transitions. [2024-06-14 14:15:21,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 612 transitions, 12643 flow [2024-06-14 14:15:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:15:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:15:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-14 14:15:21,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234521575984991 [2024-06-14 14:15:21,582 INFO L175 Difference]: Start difference. First operand has 539 places, 576 transitions, 10915 flow. Second operand 13 states and 279 transitions. [2024-06-14 14:15:21,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 612 transitions, 12643 flow [2024-06-14 14:15:31,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 612 transitions, 12460 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 14:15:31,230 INFO L231 Difference]: Finished difference. Result has 545 places, 578 transitions, 11462 flow [2024-06-14 14:15:31,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10752, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11462, PETRI_PLACES=545, PETRI_TRANSITIONS=578} [2024-06-14 14:15:31,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 503 predicate places. [2024-06-14 14:15:31,230 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 578 transitions, 11462 flow [2024-06-14 14:15:31,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:31,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:31,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:31,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 14:15:31,231 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:31,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1096354348, now seen corresponding path program 10 times [2024-06-14 14:15:31,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:31,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417106987] [2024-06-14 14:15:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:31,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:31,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:31,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417106987] [2024-06-14 14:15:31,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417106987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:31,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:31,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:15:31,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065079553] [2024-06-14 14:15:31,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:31,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:15:31,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:31,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:15:31,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:15:31,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:15:31,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 578 transitions, 11462 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:31,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:31,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:15:31,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:33,806 INFO L124 PetriNetUnfolderBase]: 4175/7068 cut-off events. [2024-06-14 14:15:33,807 INFO L125 PetriNetUnfolderBase]: For 1227297/1227297 co-relation queries the response was YES. [2024-06-14 14:15:33,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52990 conditions, 7068 events. 4175/7068 cut-off events. For 1227297/1227297 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 49849 event pairs, 1184 based on Foata normal form. 8/7069 useless extension candidates. Maximal degree in co-relation 52756. Up to 5921 conditions per place. [2024-06-14 14:15:33,919 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 312 changer transitions 0/608 dead transitions. [2024-06-14 14:15:33,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 608 transitions, 12758 flow [2024-06-14 14:15:33,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:15:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:15:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-06-14 14:15:33,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159474671669794 [2024-06-14 14:15:33,920 INFO L175 Difference]: Start difference. First operand has 545 places, 578 transitions, 11462 flow. Second operand 13 states and 275 transitions. [2024-06-14 14:15:33,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 608 transitions, 12758 flow [2024-06-14 14:15:42,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 608 transitions, 12285 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 14:15:42,191 INFO L231 Difference]: Finished difference. Result has 550 places, 578 transitions, 11618 flow [2024-06-14 14:15:42,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10989, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11618, PETRI_PLACES=550, PETRI_TRANSITIONS=578} [2024-06-14 14:15:42,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-14 14:15:42,191 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 578 transitions, 11618 flow [2024-06-14 14:15:42,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:42,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:42,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:42,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 14:15:42,192 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:42,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1484066192, now seen corresponding path program 11 times [2024-06-14 14:15:42,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:42,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229379318] [2024-06-14 14:15:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:42,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:42,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:42,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229379318] [2024-06-14 14:15:42,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229379318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:42,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:42,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:15:42,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346606139] [2024-06-14 14:15:42,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:42,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:15:42,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:42,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:15:42,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:15:42,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:15:42,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 578 transitions, 11618 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:42,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:42,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:15:42,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:44,833 INFO L124 PetriNetUnfolderBase]: 4231/7155 cut-off events. [2024-06-14 14:15:44,833 INFO L125 PetriNetUnfolderBase]: For 1341757/1341757 co-relation queries the response was YES. [2024-06-14 14:15:44,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54124 conditions, 7155 events. 4231/7155 cut-off events. For 1341757/1341757 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 50497 event pairs, 1193 based on Foata normal form. 16/7166 useless extension candidates. Maximal degree in co-relation 53888. Up to 6331 conditions per place. [2024-06-14 14:15:44,949 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 470 selfloop transitions, 129 changer transitions 0/605 dead transitions. [2024-06-14 14:15:44,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 605 transitions, 12986 flow [2024-06-14 14:15:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:15:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:15:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 14:15:44,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 14:15:44,950 INFO L175 Difference]: Start difference. First operand has 550 places, 578 transitions, 11618 flow. Second operand 8 states and 183 transitions. [2024-06-14 14:15:44,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 605 transitions, 12986 flow [2024-06-14 14:15:53,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 605 transitions, 12553 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:15:53,696 INFO L231 Difference]: Finished difference. Result has 548 places, 580 transitions, 11543 flow [2024-06-14 14:15:53,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11185, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11543, PETRI_PLACES=548, PETRI_TRANSITIONS=580} [2024-06-14 14:15:53,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 506 predicate places. [2024-06-14 14:15:53,697 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 580 transitions, 11543 flow [2024-06-14 14:15:53,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:53,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:53,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:53,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 14:15:53,697 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:53,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1791984724, now seen corresponding path program 5 times [2024-06-14 14:15:53,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:53,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139324079] [2024-06-14 14:15:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:53,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:54,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139324079] [2024-06-14 14:15:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139324079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:54,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:54,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:54,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739186578] [2024-06-14 14:15:54,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:54,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:54,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:54,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:15:54,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 580 transitions, 11543 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:54,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:54,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:15:54,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:56,064 INFO L124 PetriNetUnfolderBase]: 4251/7207 cut-off events. [2024-06-14 14:15:56,064 INFO L125 PetriNetUnfolderBase]: For 1237431/1237434 co-relation queries the response was YES. [2024-06-14 14:15:56,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54236 conditions, 7207 events. 4251/7207 cut-off events. For 1237431/1237434 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 51069 event pairs, 1164 based on Foata normal form. 8/7205 useless extension candidates. Maximal degree in co-relation 53999. Up to 5916 conditions per place. [2024-06-14 14:15:56,188 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 469 selfloop transitions, 144 changer transitions 0/619 dead transitions. [2024-06-14 14:15:56,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 619 transitions, 13237 flow [2024-06-14 14:15:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:15:56,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:15:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-14 14:15:56,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 14:15:56,189 INFO L175 Difference]: Start difference. First operand has 548 places, 580 transitions, 11543 flow. Second operand 11 states and 242 transitions. [2024-06-14 14:15:56,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 619 transitions, 13237 flow [2024-06-14 14:16:03,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 619 transitions, 12918 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 14:16:04,003 INFO L231 Difference]: Finished difference. Result has 554 places, 581 transitions, 11542 flow [2024-06-14 14:16:04,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11224, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11542, PETRI_PLACES=554, PETRI_TRANSITIONS=581} [2024-06-14 14:16:04,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 512 predicate places. [2024-06-14 14:16:04,004 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 581 transitions, 11542 flow [2024-06-14 14:16:04,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:04,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:04,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:04,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 14:16:04,005 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:04,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash -22003822, now seen corresponding path program 12 times [2024-06-14 14:16:04,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:04,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557349499] [2024-06-14 14:16:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:04,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:04,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:04,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557349499] [2024-06-14 14:16:04,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557349499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:04,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:04,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:16:04,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789467738] [2024-06-14 14:16:04,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:04,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:16:04,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:04,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:16:04,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:16:04,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:16:04,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 581 transitions, 11542 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:04,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:04,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:16:04,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:06,850 INFO L124 PetriNetUnfolderBase]: 4337/7337 cut-off events. [2024-06-14 14:16:06,850 INFO L125 PetriNetUnfolderBase]: For 1430413/1430413 co-relation queries the response was YES. [2024-06-14 14:16:06,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56651 conditions, 7337 events. 4337/7337 cut-off events. For 1430413/1430413 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 52024 event pairs, 1211 based on Foata normal form. 12/7344 useless extension candidates. Maximal degree in co-relation 56413. Up to 6305 conditions per place. [2024-06-14 14:16:06,973 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 474 selfloop transitions, 136 changer transitions 0/616 dead transitions. [2024-06-14 14:16:06,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 616 transitions, 13330 flow [2024-06-14 14:16:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:16:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:16:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 14:16:06,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-14 14:16:06,973 INFO L175 Difference]: Start difference. First operand has 554 places, 581 transitions, 11542 flow. Second operand 8 states and 190 transitions. [2024-06-14 14:16:06,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 616 transitions, 13330 flow [2024-06-14 14:16:15,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 616 transitions, 12758 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-14 14:16:15,137 INFO L231 Difference]: Finished difference. Result has 550 places, 584 transitions, 11392 flow [2024-06-14 14:16:15,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10970, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11392, PETRI_PLACES=550, PETRI_TRANSITIONS=584} [2024-06-14 14:16:15,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-14 14:16:15,138 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 584 transitions, 11392 flow [2024-06-14 14:16:15,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:15,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:15,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:15,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 14:16:15,138 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:15,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1478703812, now seen corresponding path program 13 times [2024-06-14 14:16:15,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:15,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612903621] [2024-06-14 14:16:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:15,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:15,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:15,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612903621] [2024-06-14 14:16:15,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612903621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:15,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:15,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:16:15,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669706370] [2024-06-14 14:16:15,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:15,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:16:15,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:15,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:16:15,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:16:15,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:16:15,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 584 transitions, 11392 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:15,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:15,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:16:15,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:17,738 INFO L124 PetriNetUnfolderBase]: 4393/7421 cut-off events. [2024-06-14 14:16:17,739 INFO L125 PetriNetUnfolderBase]: For 1505376/1505376 co-relation queries the response was YES. [2024-06-14 14:16:17,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56499 conditions, 7421 events. 4393/7421 cut-off events. For 1505376/1505376 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 52626 event pairs, 1231 based on Foata normal form. 16/7432 useless extension candidates. Maximal degree in co-relation 56263. Up to 6585 conditions per place. [2024-06-14 14:16:17,862 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 132 changer transitions 0/613 dead transitions. [2024-06-14 14:16:17,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 613 transitions, 12788 flow [2024-06-14 14:16:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:16:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:16:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-14 14:16:17,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-14 14:16:17,863 INFO L175 Difference]: Start difference. First operand has 550 places, 584 transitions, 11392 flow. Second operand 10 states and 217 transitions. [2024-06-14 14:16:17,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 613 transitions, 12788 flow [2024-06-14 14:16:28,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 613 transitions, 12313 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 14:16:28,178 INFO L231 Difference]: Finished difference. Result has 555 places, 586 transitions, 11289 flow [2024-06-14 14:16:28,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10929, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11289, PETRI_PLACES=555, PETRI_TRANSITIONS=586} [2024-06-14 14:16:28,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 513 predicate places. [2024-06-14 14:16:28,179 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 586 transitions, 11289 flow [2024-06-14 14:16:28,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:28,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:28,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:28,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 14:16:28,179 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:28,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash 154340980, now seen corresponding path program 6 times [2024-06-14 14:16:28,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:28,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378156686] [2024-06-14 14:16:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:28,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:28,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:28,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378156686] [2024-06-14 14:16:28,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378156686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:28,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:28,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:28,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22610618] [2024-06-14 14:16:28,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:28,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:28,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:28,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:16:28,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 586 transitions, 11289 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:28,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:28,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:16:28,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:30,765 INFO L124 PetriNetUnfolderBase]: 4413/7465 cut-off events. [2024-06-14 14:16:30,765 INFO L125 PetriNetUnfolderBase]: For 1387747/1387750 co-relation queries the response was YES. [2024-06-14 14:16:30,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55849 conditions, 7465 events. 4413/7465 cut-off events. For 1387747/1387750 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 53073 event pairs, 1198 based on Foata normal form. 8/7463 useless extension candidates. Maximal degree in co-relation 55612. Up to 6150 conditions per place. [2024-06-14 14:16:30,884 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 475 selfloop transitions, 142 changer transitions 0/623 dead transitions. [2024-06-14 14:16:30,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 623 transitions, 12987 flow [2024-06-14 14:16:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:16:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:16:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-14 14:16:30,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532150776053215 [2024-06-14 14:16:30,885 INFO L175 Difference]: Start difference. First operand has 555 places, 586 transitions, 11289 flow. Second operand 11 states and 240 transitions. [2024-06-14 14:16:30,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 623 transitions, 12987 flow [2024-06-14 14:16:42,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 623 transitions, 12669 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 14:16:42,454 INFO L231 Difference]: Finished difference. Result has 559 places, 587 transitions, 11271 flow [2024-06-14 14:16:42,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10971, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11271, PETRI_PLACES=559, PETRI_TRANSITIONS=587} [2024-06-14 14:16:42,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 517 predicate places. [2024-06-14 14:16:42,455 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 587 transitions, 11271 flow [2024-06-14 14:16:42,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:42,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:42,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:42,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 14:16:42,455 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:42,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash -230466730, now seen corresponding path program 14 times [2024-06-14 14:16:42,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:42,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081280369] [2024-06-14 14:16:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:42,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:42,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:42,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081280369] [2024-06-14 14:16:42,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081280369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:42,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:42,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:16:42,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823488273] [2024-06-14 14:16:42,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:42,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:16:42,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:16:42,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:16:42,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:16:42,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 587 transitions, 11271 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:42,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:42,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:16:42,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:45,202 INFO L124 PetriNetUnfolderBase]: 4479/7559 cut-off events. [2024-06-14 14:16:45,202 INFO L125 PetriNetUnfolderBase]: For 1507609/1507609 co-relation queries the response was YES. [2024-06-14 14:16:45,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58062 conditions, 7559 events. 4479/7559 cut-off events. For 1507609/1507609 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 53733 event pairs, 1241 based on Foata normal form. 6/7558 useless extension candidates. Maximal degree in co-relation 57824. Up to 6631 conditions per place. [2024-06-14 14:16:45,327 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 486 selfloop transitions, 134 changer transitions 0/626 dead transitions. [2024-06-14 14:16:45,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 626 transitions, 13057 flow [2024-06-14 14:16:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:16:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:16:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-14 14:16:45,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 14:16:45,329 INFO L175 Difference]: Start difference. First operand has 559 places, 587 transitions, 11271 flow. Second operand 12 states and 258 transitions. [2024-06-14 14:16:45,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 626 transitions, 13057 flow [2024-06-14 14:16:56,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 626 transitions, 12798 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:16:56,752 INFO L231 Difference]: Finished difference. Result has 563 places, 589 transitions, 11390 flow [2024-06-14 14:16:56,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11012, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11390, PETRI_PLACES=563, PETRI_TRANSITIONS=589} [2024-06-14 14:16:56,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 521 predicate places. [2024-06-14 14:16:56,753 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 589 transitions, 11390 flow [2024-06-14 14:16:56,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:56,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:56,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:56,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 14:16:56,754 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:56,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:56,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1703408362, now seen corresponding path program 15 times [2024-06-14 14:16:56,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:56,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574743477] [2024-06-14 14:16:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:56,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:57,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:57,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574743477] [2024-06-14 14:16:57,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574743477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:57,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:57,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:16:57,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97977632] [2024-06-14 14:16:57,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:57,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:16:57,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:57,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:16:57,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:16:57,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:16:57,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 589 transitions, 11390 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:57,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:57,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:16:57,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:59,590 INFO L124 PetriNetUnfolderBase]: 4545/7676 cut-off events. [2024-06-14 14:16:59,590 INFO L125 PetriNetUnfolderBase]: For 1642690/1642690 co-relation queries the response was YES. [2024-06-14 14:16:59,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60662 conditions, 7676 events. 4545/7676 cut-off events. For 1642690/1642690 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 54756 event pairs, 1268 based on Foata normal form. 6/7675 useless extension candidates. Maximal degree in co-relation 60423. Up to 6451 conditions per place. [2024-06-14 14:16:59,721 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 297 selfloop transitions, 322 changer transitions 0/625 dead transitions. [2024-06-14 14:16:59,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 625 transitions, 13172 flow [2024-06-14 14:16:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:16:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:16:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 278 transitions. [2024-06-14 14:16:59,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215759849906192 [2024-06-14 14:16:59,722 INFO L175 Difference]: Start difference. First operand has 563 places, 589 transitions, 11390 flow. Second operand 13 states and 278 transitions. [2024-06-14 14:16:59,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 625 transitions, 13172 flow [2024-06-14 14:17:12,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 625 transitions, 12944 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-14 14:17:12,904 INFO L231 Difference]: Finished difference. Result has 569 places, 591 transitions, 11920 flow [2024-06-14 14:17:12,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11190, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11920, PETRI_PLACES=569, PETRI_TRANSITIONS=591} [2024-06-14 14:17:12,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 527 predicate places. [2024-06-14 14:17:12,905 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 591 transitions, 11920 flow [2024-06-14 14:17:12,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:12,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:12,906 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, 1, 1] [2024-06-14 14:17:12,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 14:17:12,906 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:12,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:12,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1478488610, now seen corresponding path program 4 times [2024-06-14 14:17:12,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:12,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100755146] [2024-06-14 14:17:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:12,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:13,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:13,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100755146] [2024-06-14 14:17:13,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100755146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:13,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:13,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:17:13,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141737531] [2024-06-14 14:17:13,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:13,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:17:13,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:13,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:17:13,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:17:13,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:17:13,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 591 transitions, 11920 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:13,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:13,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:17:13,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:15,765 INFO L124 PetriNetUnfolderBase]: 4565/7705 cut-off events. [2024-06-14 14:17:15,765 INFO L125 PetriNetUnfolderBase]: For 1657839/1657839 co-relation queries the response was YES. [2024-06-14 14:17:15,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61224 conditions, 7705 events. 4565/7705 cut-off events. For 1657839/1657839 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 54939 event pairs, 1275 based on Foata normal form. 6/7706 useless extension candidates. Maximal degree in co-relation 60983. Up to 6757 conditions per place. [2024-06-14 14:17:15,897 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 479 selfloop transitions, 137 changer transitions 0/622 dead transitions. [2024-06-14 14:17:15,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 622 transitions, 13308 flow [2024-06-14 14:17:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:17:15,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:17:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 14:17:15,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 14:17:15,898 INFO L175 Difference]: Start difference. First operand has 569 places, 591 transitions, 11920 flow. Second operand 10 states and 219 transitions. [2024-06-14 14:17:15,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 622 transitions, 13308 flow [2024-06-14 14:17:26,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 622 transitions, 12946 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 14:17:26,075 INFO L231 Difference]: Finished difference. Result has 572 places, 592 transitions, 11892 flow [2024-06-14 14:17:26,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11558, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11892, PETRI_PLACES=572, PETRI_TRANSITIONS=592} [2024-06-14 14:17:26,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 530 predicate places. [2024-06-14 14:17:26,075 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 592 transitions, 11892 flow [2024-06-14 14:17:26,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:26,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:26,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:26,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 14:17:26,076 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:26,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1844784286, now seen corresponding path program 7 times [2024-06-14 14:17:26,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:26,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878881456] [2024-06-14 14:17:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:26,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:26,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:26,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878881456] [2024-06-14 14:17:26,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878881456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:26,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:26,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:26,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726547488] [2024-06-14 14:17:26,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:26,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:26,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:26,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:26,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:26,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:17:26,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 592 transitions, 11892 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:26,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:26,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:17:26,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:28,642 INFO L124 PetriNetUnfolderBase]: 4585/7757 cut-off events. [2024-06-14 14:17:28,643 INFO L125 PetriNetUnfolderBase]: For 1675183/1675186 co-relation queries the response was YES. [2024-06-14 14:17:28,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61516 conditions, 7757 events. 4585/7757 cut-off events. For 1675183/1675186 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 55499 event pairs, 1284 based on Foata normal form. 8/7755 useless extension candidates. Maximal degree in co-relation 61273. Up to 6812 conditions per place. [2024-06-14 14:17:28,782 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 485 selfloop transitions, 130 changer transitions 0/621 dead transitions. [2024-06-14 14:17:28,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 621 transitions, 13229 flow [2024-06-14 14:17:28,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:17:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:17:28,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-14 14:17:28,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516629711751663 [2024-06-14 14:17:28,784 INFO L175 Difference]: Start difference. First operand has 572 places, 592 transitions, 11892 flow. Second operand 11 states and 233 transitions. [2024-06-14 14:17:28,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 621 transitions, 13229 flow [2024-06-14 14:17:42,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 621 transitions, 12842 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-14 14:17:42,087 INFO L231 Difference]: Finished difference. Result has 574 places, 593 transitions, 11784 flow [2024-06-14 14:17:42,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11505, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11784, PETRI_PLACES=574, PETRI_TRANSITIONS=593} [2024-06-14 14:17:42,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 532 predicate places. [2024-06-14 14:17:42,089 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 593 transitions, 11784 flow [2024-06-14 14:17:42,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:42,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:42,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:42,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 14:17:42,091 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:42,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:42,091 INFO L85 PathProgramCache]: Analyzing trace with hash -141753100, now seen corresponding path program 16 times [2024-06-14 14:17:42,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:42,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502269622] [2024-06-14 14:17:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:42,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:42,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502269622] [2024-06-14 14:17:42,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502269622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:42,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:42,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:17:42,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654029664] [2024-06-14 14:17:42,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:42,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:17:42,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:42,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:17:42,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:17:42,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:17:42,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 593 transitions, 11784 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:42,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:42,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:17:42,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:44,626 INFO L124 PetriNetUnfolderBase]: 4567/7720 cut-off events. [2024-06-14 14:17:44,626 INFO L125 PetriNetUnfolderBase]: For 1606897/1606897 co-relation queries the response was YES. [2024-06-14 14:17:45,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59744 conditions, 7720 events. 4567/7720 cut-off events. For 1606897/1606897 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 55217 event pairs, 1280 based on Foata normal form. 8/7721 useless extension candidates. Maximal degree in co-relation 59500. Up to 6889 conditions per place. [2024-06-14 14:17:45,050 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 489 selfloop transitions, 127 changer transitions 0/622 dead transitions. [2024-06-14 14:17:45,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 622 transitions, 13106 flow [2024-06-14 14:17:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:17:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:17:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-14 14:17:45,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101626016260162 [2024-06-14 14:17:45,052 INFO L175 Difference]: Start difference. First operand has 574 places, 593 transitions, 11784 flow. Second operand 12 states and 251 transitions. [2024-06-14 14:17:45,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 622 transitions, 13106 flow