./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe005_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/safe005_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe005_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe005_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-76401ed-m [2024-06-20 17:45:33,121 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:45:33,213 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:45:33,219 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:45:33,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:45:33,265 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:45:33,270 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:45:33,270 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:45:33,271 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:45:33,277 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:45:33,277 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:45:33,277 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:45:33,278 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:45:33,280 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:45:33,281 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:45:33,281 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:45:33,281 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:45:33,282 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:45:33,282 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:45:33,282 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:45:33,283 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:45:33,283 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:45:33,283 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:45:33,283 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:45:33,284 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:45:33,284 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:45:33,284 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:45:33,285 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:45:33,285 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:45:33,286 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:45:33,286 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:45:33,287 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:45:33,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:45:33,287 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:45:33,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:45:33,288 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:45:33,288 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:45:33,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:45:33,288 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:45:33,289 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:45:33,289 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:45:33,289 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:45:33,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:45:33,290 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:45:33,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:45:33,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:45:33,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:45:33,580 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:45:33,580 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:45:33,581 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-20 17:45:34,800 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:45:35,044 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:45:35,045 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-20 17:45:35,061 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7153c64d/b1a74dc5be3d4444824020c1b142e6f0/FLAG9d6a1a1be [2024-06-20 17:45:35,075 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7153c64d/b1a74dc5be3d4444824020c1b142e6f0 [2024-06-20 17:45:35,078 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:45:35,078 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:45:35,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe005_tso.yml/witness.yml [2024-06-20 17:45:35,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:45:35,243 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:45:35,244 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:45:35,244 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:45:35,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:45:35,254 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:45:35" (1/2) ... [2024-06-20 17:45:35,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2799e086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:35, skipping insertion in model container [2024-06-20 17:45:35,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:45:35" (1/2) ... [2024-06-20 17:45:35,257 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3593fb8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:35, skipping insertion in model container [2024-06-20 17:45:35,258 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:45:35" (2/2) ... [2024-06-20 17:45:35,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2799e086 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35, skipping insertion in model container [2024-06-20 17:45:35,258 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:45:35" (2/2) ... [2024-06-20 17:45:35,258 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:45:35,317 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:45:35,319 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 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$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 17:45:35,319 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 17:45:35,320 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 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$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 17:45:35,320 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:45:35,321 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-20 17:45:35,371 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:45:35,731 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:45:35,740 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:45:35,887 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:45:35,950 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:45:35,951 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35 WrapperNode [2024-06-20 17:45:35,953 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:45:35,954 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:45:35,954 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:45:35,954 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:45:35,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:35,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:36,038 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-20 17:45:36,038 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:45:36,039 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:45:36,041 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:45:36,041 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:45:36,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:36,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:36,058 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:36,076 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]. [2024-06-20 17:45:36,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:36,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:36,098 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:36,109 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:36,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:36,127 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:36,131 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:45:36,132 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:45:36,132 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:45:36,132 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:45:36,133 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (1/1) ... [2024-06-20 17:45:36,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:45:36,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:45:36,170 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) [2024-06-20 17:45:36,189 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 [2024-06-20 17:45:36,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:45:36,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:45:36,215 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:45:36,215 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:45:36,215 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:45:36,216 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:45:36,216 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:45:36,216 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:45:36,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:45:36,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:45:36,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:45:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:45:36,218 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:45:36,330 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:45:36,332 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:45:36,692 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:45:36,694 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:45:36,830 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:45:36,830 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:45:36,831 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:45:36 BoogieIcfgContainer [2024-06-20 17:45:36,831 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:45:36,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:45:36,833 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:45:36,836 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:45:36,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:45:35" (1/4) ... [2024-06-20 17:45:36,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5114f450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:45:36, skipping insertion in model container [2024-06-20 17:45:36,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:45:35" (2/4) ... [2024-06-20 17:45:36,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5114f450 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:45:36, skipping insertion in model container [2024-06-20 17:45:36,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:35" (3/4) ... [2024-06-20 17:45:36,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5114f450 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:45:36, skipping insertion in model container [2024-06-20 17:45:36,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:45:36" (4/4) ... [2024-06-20 17:45:36,840 INFO L112 eAbstractionObserver]: Analyzing ICFG safe005_tso.i [2024-06-20 17:45:36,854 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:45:36,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:45:36,855 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:45:36,905 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:45:36,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:45:36,969 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 17:45:36,970 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:45:36,972 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 5. Compared 66 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. [2024-06-20 17:45:36,972 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:45:36,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 17:45:36,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:45:36,999 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;@262053d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:45:36,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:45:37,003 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:45:37,003 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:45:37,003 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:45:37,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:37,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:45:37,005 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)] === [2024-06-20 17:45:37,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:37,011 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-20 17:45:37,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:37,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516235022] [2024-06-20 17:45:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:37,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:37,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:37,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516235022] [2024-06-20 17:45:37,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516235022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:37,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:37,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:45:37,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907774587] [2024-06-20 17:45:37,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:37,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:45:37,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:37,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:45:37,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:45:37,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-20 17:45:37,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:37,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:37,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-20 17:45:37,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:38,226 INFO L124 PetriNetUnfolderBase]: 470/794 cut-off events. [2024-06-20 17:45:38,227 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-20 17:45:38,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593 conditions, 794 events. 470/794 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3834 event pairs, 281 based on Foata normal form. 1/747 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-20 17:45:38,242 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 17:45:38,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 161 flow [2024-06-20 17:45:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:45:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:45:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-20 17:45:38,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2024-06-20 17:45:38,259 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 88 transitions. [2024-06-20 17:45:38,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 161 flow [2024-06-20 17:45:38,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:38,266 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 17:45:38,268 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} [2024-06-20 17:45:38,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 17:45:38,273 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 17:45:38,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:38,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:38,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:38,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:45:38,274 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)] === [2024-06-20 17:45:38,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:38,275 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-20 17:45:38,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:38,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566204988] [2024-06-20 17:45:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:38,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:38,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:38,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566204988] [2024-06-20 17:45:38,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566204988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:38,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:38,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:45:38,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614640910] [2024-06-20 17:45:38,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:38,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:45:38,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:45:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:45:38,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 17:45:38,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:38,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:38,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 17:45:38,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:38,834 INFO L124 PetriNetUnfolderBase]: 724/1188 cut-off events. [2024-06-20 17:45:38,834 INFO L125 PetriNetUnfolderBase]: For 255/289 co-relation queries the response was YES. [2024-06-20 17:45:38,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2718 conditions, 1188 events. 724/1188 cut-off events. For 255/289 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6052 event pairs, 401 based on Foata normal form. 3/1156 useless extension candidates. Maximal degree in co-relation 2706. Up to 1090 conditions per place. [2024-06-20 17:45:38,845 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-20 17:45:38,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 248 flow [2024-06-20 17:45:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:45:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:45:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-20 17:45:38,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-06-20 17:45:38,850 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 110 transitions. [2024-06-20 17:45:38,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 248 flow [2024-06-20 17:45:38,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:45:38,854 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-20 17:45:38,855 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} [2024-06-20 17:45:38,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-20 17:45:38,856 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-20 17:45:38,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:38,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:38,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:38,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:45:38,860 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:38,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 627187612, now seen corresponding path program 1 times [2024-06-20 17:45:38,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:38,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865735243] [2024-06-20 17:45:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:38,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:39,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865735243] [2024-06-20 17:45:39,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865735243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:39,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:39,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:45:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166182989] [2024-06-20 17:45:39,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:39,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:45:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:45:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:45:39,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-20 17:45:39,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:39,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:39,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-20 17:45:39,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:39,494 INFO L124 PetriNetUnfolderBase]: 632/1065 cut-off events. [2024-06-20 17:45:39,494 INFO L125 PetriNetUnfolderBase]: For 588/681 co-relation queries the response was YES. [2024-06-20 17:45:39,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2737 conditions, 1065 events. 632/1065 cut-off events. For 588/681 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5424 event pairs, 334 based on Foata normal form. 2/1024 useless extension candidates. Maximal degree in co-relation 2722. Up to 968 conditions per place. [2024-06-20 17:45:39,504 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2024-06-20 17:45:39,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 55 transitions, 276 flow [2024-06-20 17:45:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:45:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:45:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-20 17:45:39,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-20 17:45:39,506 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 4 states and 109 transitions. [2024-06-20 17:45:39,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 55 transitions, 276 flow [2024-06-20 17:45:39,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 274 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 17:45:39,509 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 193 flow [2024-06-20 17:45:39,509 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-20 17:45:39,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-20 17:45:39,510 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 193 flow [2024-06-20 17:45:39,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:39,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:39,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:39,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:45:39,511 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)] === [2024-06-20 17:45:39,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:39,512 INFO L85 PathProgramCache]: Analyzing trace with hash 816716713, now seen corresponding path program 1 times [2024-06-20 17:45:39,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:39,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487508287] [2024-06-20 17:45:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:39,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:39,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:39,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487508287] [2024-06-20 17:45:39,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487508287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:39,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:39,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:39,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424848920] [2024-06-20 17:45:39,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:39,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:39,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:39,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:39,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:39,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:39,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 193 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) [2024-06-20 17:45:39,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:39,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:39,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:40,126 INFO L124 PetriNetUnfolderBase]: 908/1468 cut-off events. [2024-06-20 17:45:40,127 INFO L125 PetriNetUnfolderBase]: For 1410/1410 co-relation queries the response was YES. [2024-06-20 17:45:40,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4142 conditions, 1468 events. 908/1468 cut-off events. For 1410/1410 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7260 event pairs, 290 based on Foata normal form. 6/1462 useless extension candidates. Maximal degree in co-relation 4124. Up to 1315 conditions per place. [2024-06-20 17:45:40,140 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-06-20 17:45:40,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 407 flow [2024-06-20 17:45:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 17:45:40,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 17:45:40,143 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 193 flow. Second operand 6 states and 153 transitions. [2024-06-20 17:45:40,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 407 flow [2024-06-20 17:45:40,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:40,148 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 233 flow [2024-06-20 17:45:40,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-20 17:45:40,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-20 17:45:40,149 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 233 flow [2024-06-20 17:45:40,150 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) [2024-06-20 17:45:40,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:40,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:40,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:45:40,150 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)] === [2024-06-20 17:45:40,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:40,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2032019753, now seen corresponding path program 1 times [2024-06-20 17:45:40,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:40,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536956316] [2024-06-20 17:45:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:40,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:40,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:40,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536956316] [2024-06-20 17:45:40,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536956316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:40,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:40,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:45:40,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224271767] [2024-06-20 17:45:40,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:40,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:45:40,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:40,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:45:40,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:45:40,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:40,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:40,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:40,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:40,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:40,843 INFO L124 PetriNetUnfolderBase]: 917/1512 cut-off events. [2024-06-20 17:45:40,843 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2024-06-20 17:45:40,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4581 conditions, 1512 events. 917/1512 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7655 event pairs, 320 based on Foata normal form. 4/1511 useless extension candidates. Maximal degree in co-relation 4561. Up to 1318 conditions per place. [2024-06-20 17:45:40,855 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 15 changer transitions 0/75 dead transitions. [2024-06-20 17:45:40,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 467 flow [2024-06-20 17:45:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:45:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:45:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 17:45:40,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 17:45:40,857 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 233 flow. Second operand 5 states and 130 transitions. [2024-06-20 17:45:40,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 467 flow [2024-06-20 17:45:40,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 442 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:40,861 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 306 flow [2024-06-20 17:45:40,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-20 17:45:40,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-20 17:45:40,863 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 306 flow [2024-06-20 17:45:40,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:40,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:40,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:40,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:45:40,864 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)] === [2024-06-20 17:45:40,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2000396091, now seen corresponding path program 1 times [2024-06-20 17:45:40,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:40,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489188486] [2024-06-20 17:45:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:40,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:41,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:41,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489188486] [2024-06-20 17:45:41,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489188486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:41,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:41,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:45:41,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658389624] [2024-06-20 17:45:41,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:41,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:45:41,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:41,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:45:41,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:45:41,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:41,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:41,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:41,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:41,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:41,497 INFO L124 PetriNetUnfolderBase]: 928/1533 cut-off events. [2024-06-20 17:45:41,497 INFO L125 PetriNetUnfolderBase]: For 3308/3311 co-relation queries the response was YES. [2024-06-20 17:45:41,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5231 conditions, 1533 events. 928/1533 cut-off events. For 3308/3311 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7767 event pairs, 341 based on Foata normal form. 2/1529 useless extension candidates. Maximal degree in co-relation 5209. Up to 1325 conditions per place. [2024-06-20 17:45:41,511 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-20 17:45:41,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 561 flow [2024-06-20 17:45:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:45:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:45:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-20 17:45:41,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6536585365853659 [2024-06-20 17:45:41,513 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 306 flow. Second operand 5 states and 134 transitions. [2024-06-20 17:45:41,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 561 flow [2024-06-20 17:45:41,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 529 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:41,524 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 370 flow [2024-06-20 17:45:41,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=370, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2024-06-20 17:45:41,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-20 17:45:41,527 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 370 flow [2024-06-20 17:45:41,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:41,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:41,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:41,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:45:41,528 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)] === [2024-06-20 17:45:41,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:41,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2119657435, now seen corresponding path program 2 times [2024-06-20 17:45:41,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:41,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118297484] [2024-06-20 17:45:41,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:41,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:41,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:41,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118297484] [2024-06-20 17:45:41,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118297484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:41,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:41,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:45:41,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982988203] [2024-06-20 17:45:41,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:41,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:45:41,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:45:41,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:45:41,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:41,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 370 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:41,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:41,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:41,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:42,130 INFO L124 PetriNetUnfolderBase]: 915/1510 cut-off events. [2024-06-20 17:45:42,130 INFO L125 PetriNetUnfolderBase]: For 3810/3810 co-relation queries the response was YES. [2024-06-20 17:45:42,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5269 conditions, 1510 events. 915/1510 cut-off events. For 3810/3810 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7612 event pairs, 336 based on Foata normal form. 4/1509 useless extension candidates. Maximal degree in co-relation 5245. Up to 1312 conditions per place. [2024-06-20 17:45:42,145 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 51 selfloop transitions, 18 changer transitions 0/77 dead transitions. [2024-06-20 17:45:42,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 546 flow [2024-06-20 17:45:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:45:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:45:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-20 17:45:42,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-20 17:45:42,147 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 370 flow. Second operand 5 states and 128 transitions. [2024-06-20 17:45:42,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 546 flow [2024-06-20 17:45:42,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 523 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-20 17:45:42,153 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 393 flow [2024-06-20 17:45:42,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=393, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-20 17:45:42,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-20 17:45:42,154 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 393 flow [2024-06-20 17:45:42,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:42,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:42,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:42,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:45:42,155 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)] === [2024-06-20 17:45:42,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1439162230, now seen corresponding path program 1 times [2024-06-20 17:45:42,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:42,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142340573] [2024-06-20 17:45:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:42,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:42,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:42,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142340573] [2024-06-20 17:45:42,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142340573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:42,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:42,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:42,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768027003] [2024-06-20 17:45:42,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:42,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:42,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:42,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:42,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:42,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:42,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 393 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:42,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:42,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:42,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:42,781 INFO L124 PetriNetUnfolderBase]: 924/1521 cut-off events. [2024-06-20 17:45:42,781 INFO L125 PetriNetUnfolderBase]: For 4814/4814 co-relation queries the response was YES. [2024-06-20 17:45:42,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5436 conditions, 1521 events. 924/1521 cut-off events. For 4814/4814 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7614 event pairs, 306 based on Foata normal form. 8/1524 useless extension candidates. Maximal degree in co-relation 5410. Up to 1291 conditions per place. [2024-06-20 17:45:42,796 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 22 changer transitions 0/85 dead transitions. [2024-06-20 17:45:42,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 617 flow [2024-06-20 17:45:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 17:45:42,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-20 17:45:42,799 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 393 flow. Second operand 6 states and 151 transitions. [2024-06-20 17:45:42,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 617 flow [2024-06-20 17:45:42,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 588 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:42,807 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 442 flow [2024-06-20 17:45:42,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=442, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-20 17:45:42,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-20 17:45:42,808 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 442 flow [2024-06-20 17:45:42,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:42,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:42,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:42,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:45:42,809 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)] === [2024-06-20 17:45:42,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:42,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1769449510, now seen corresponding path program 1 times [2024-06-20 17:45:42,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:42,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260199482] [2024-06-20 17:45:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:42,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:43,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:43,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260199482] [2024-06-20 17:45:43,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260199482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:43,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:43,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:43,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974028284] [2024-06-20 17:45:43,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:43,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:45:43,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:43,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:45:43,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:45:43,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:43,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 442 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:43,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:43,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:43,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:43,488 INFO L124 PetriNetUnfolderBase]: 935/1546 cut-off events. [2024-06-20 17:45:43,488 INFO L125 PetriNetUnfolderBase]: For 5859/5859 co-relation queries the response was YES. [2024-06-20 17:45:43,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5859 conditions, 1546 events. 935/1546 cut-off events. For 5859/5859 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7788 event pairs, 308 based on Foata normal form. 2/1546 useless extension candidates. Maximal degree in co-relation 5832. Up to 1369 conditions per place. [2024-06-20 17:45:43,505 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 63 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2024-06-20 17:45:43,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 86 transitions, 664 flow [2024-06-20 17:45:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:45:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:45:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 17:45:43,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-20 17:45:43,507 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 442 flow. Second operand 5 states and 129 transitions. [2024-06-20 17:45:43,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 86 transitions, 664 flow [2024-06-20 17:45:43,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 610 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:43,519 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 456 flow [2024-06-20 17:45:43,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-20 17:45:43,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-20 17:45:43,521 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 456 flow [2024-06-20 17:45:43,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:43,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:43,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:43,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:45:43,522 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)] === [2024-06-20 17:45:43,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:43,522 INFO L85 PathProgramCache]: Analyzing trace with hash -455521062, now seen corresponding path program 2 times [2024-06-20 17:45:43,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:43,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096501886] [2024-06-20 17:45:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:43,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:43,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:43,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096501886] [2024-06-20 17:45:43,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096501886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:43,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:43,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:43,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419332330] [2024-06-20 17:45:43,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:43,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:45:43,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:43,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:45:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:45:43,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:43,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 456 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:43,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:43,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:43,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:44,234 INFO L124 PetriNetUnfolderBase]: 962/1591 cut-off events. [2024-06-20 17:45:44,234 INFO L125 PetriNetUnfolderBase]: For 7206/7209 co-relation queries the response was YES. [2024-06-20 17:45:44,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6280 conditions, 1591 events. 962/1591 cut-off events. For 7206/7209 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8079 event pairs, 304 based on Foata normal form. 2/1587 useless extension candidates. Maximal degree in co-relation 6252. Up to 1299 conditions per place. [2024-06-20 17:45:44,257 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 76 selfloop transitions, 35 changer transitions 0/119 dead transitions. [2024-06-20 17:45:44,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 119 transitions, 930 flow [2024-06-20 17:45:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:45:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:45:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-20 17:45:44,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205962059620597 [2024-06-20 17:45:44,259 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 456 flow. Second operand 9 states and 229 transitions. [2024-06-20 17:45:44,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 119 transitions, 930 flow [2024-06-20 17:45:44,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 119 transitions, 882 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:44,274 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 580 flow [2024-06-20 17:45:44,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=580, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-20 17:45:44,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-20 17:45:44,278 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 580 flow [2024-06-20 17:45:44,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:44,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:44,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:44,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:45:44,279 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)] === [2024-06-20 17:45:44,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash 705318268, now seen corresponding path program 3 times [2024-06-20 17:45:44,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:44,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156923670] [2024-06-20 17:45:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:44,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:44,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:44,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156923670] [2024-06-20 17:45:44,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156923670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:44,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:44,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:44,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419702959] [2024-06-20 17:45:44,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:44,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:45:44,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:44,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:45:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:45:44,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:44,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 580 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:44,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:44,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:44,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:44,982 INFO L124 PetriNetUnfolderBase]: 952/1575 cut-off events. [2024-06-20 17:45:44,983 INFO L125 PetriNetUnfolderBase]: For 7815/7815 co-relation queries the response was YES. [2024-06-20 17:45:44,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6545 conditions, 1575 events. 952/1575 cut-off events. For 7815/7815 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7978 event pairs, 299 based on Foata normal form. 4/1574 useless extension candidates. Maximal degree in co-relation 6517. Up to 1291 conditions per place. [2024-06-20 17:45:44,997 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 70 selfloop transitions, 32 changer transitions 0/110 dead transitions. [2024-06-20 17:45:44,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 110 transitions, 900 flow [2024-06-20 17:45:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:45:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:45:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 17:45:45,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 17:45:45,000 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 580 flow. Second operand 8 states and 201 transitions. [2024-06-20 17:45:45,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 110 transitions, 900 flow [2024-06-20 17:45:45,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 110 transitions, 817 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:45,029 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 570 flow [2024-06-20 17:45:45,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=570, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2024-06-20 17:45:45,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-20 17:45:45,030 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 570 flow [2024-06-20 17:45:45,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:45,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:45,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:45,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:45:45,031 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)] === [2024-06-20 17:45:45,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:45,031 INFO L85 PathProgramCache]: Analyzing trace with hash 94826541, now seen corresponding path program 1 times [2024-06-20 17:45:45,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:45,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825878685] [2024-06-20 17:45:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:45,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:45,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:45,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825878685] [2024-06-20 17:45:45,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825878685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:45,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:45,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:45,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466894520] [2024-06-20 17:45:45,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:45,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:45:45,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:45,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:45:45,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:45:45,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:45,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 570 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:45,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:45,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:45,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:45,667 INFO L124 PetriNetUnfolderBase]: 963/1591 cut-off events. [2024-06-20 17:45:45,667 INFO L125 PetriNetUnfolderBase]: For 8815/8815 co-relation queries the response was YES. [2024-06-20 17:45:45,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6741 conditions, 1591 events. 963/1591 cut-off events. For 8815/8815 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8097 event pairs, 307 based on Foata normal form. 2/1585 useless extension candidates. Maximal degree in co-relation 6711. Up to 1351 conditions per place. [2024-06-20 17:45:45,681 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 61 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2024-06-20 17:45:45,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 96 transitions, 812 flow [2024-06-20 17:45:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:45:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:45:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 17:45:45,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-20 17:45:45,683 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 570 flow. Second operand 5 states and 131 transitions. [2024-06-20 17:45:45,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 96 transitions, 812 flow [2024-06-20 17:45:45,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 726 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 17:45:45,698 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 587 flow [2024-06-20 17:45:45,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=587, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-20 17:45:45,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-20 17:45:45,699 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 587 flow [2024-06-20 17:45:45,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:45,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:45,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:45,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:45:45,700 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)] === [2024-06-20 17:45:45,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash 985359863, now seen corresponding path program 2 times [2024-06-20 17:45:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:45,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958294110] [2024-06-20 17:45:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:45,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:46,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:46,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958294110] [2024-06-20 17:45:46,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958294110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:46,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:46,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:46,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616279439] [2024-06-20 17:45:46,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:46,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:45:46,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:45:46,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:45:46,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:46,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 587 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:46,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:46,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:46,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:46,409 INFO L124 PetriNetUnfolderBase]: 974/1617 cut-off events. [2024-06-20 17:45:46,409 INFO L125 PetriNetUnfolderBase]: For 9891/9891 co-relation queries the response was YES. [2024-06-20 17:45:46,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6903 conditions, 1617 events. 974/1617 cut-off events. For 9891/9891 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8256 event pairs, 300 based on Foata normal form. 2/1614 useless extension candidates. Maximal degree in co-relation 6873. Up to 1315 conditions per place. [2024-06-20 17:45:46,423 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 72 selfloop transitions, 36 changer transitions 0/116 dead transitions. [2024-06-20 17:45:46,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 116 transitions, 955 flow [2024-06-20 17:45:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:45:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:45:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 17:45:46,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 17:45:46,426 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 587 flow. Second operand 8 states and 200 transitions. [2024-06-20 17:45:46,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 116 transitions, 955 flow [2024-06-20 17:45:46,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 902 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:46,444 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 643 flow [2024-06-20 17:45:46,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=643, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-20 17:45:46,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-20 17:45:46,446 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 643 flow [2024-06-20 17:45:46,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:46,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:46,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:46,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:45:46,447 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)] === [2024-06-20 17:45:46,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1129255973, now seen corresponding path program 3 times [2024-06-20 17:45:46,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:46,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217010557] [2024-06-20 17:45:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:46,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:46,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:46,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217010557] [2024-06-20 17:45:46,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217010557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:46,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:46,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:46,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603198216] [2024-06-20 17:45:46,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:46,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:45:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:45:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:45:46,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:46,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 643 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:46,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:46,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:46,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:47,161 INFO L124 PetriNetUnfolderBase]: 969/1610 cut-off events. [2024-06-20 17:45:47,162 INFO L125 PetriNetUnfolderBase]: For 11320/11320 co-relation queries the response was YES. [2024-06-20 17:45:47,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7030 conditions, 1610 events. 969/1610 cut-off events. For 11320/11320 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8217 event pairs, 300 based on Foata normal form. 2/1607 useless extension candidates. Maximal degree in co-relation 6999. Up to 1310 conditions per place. [2024-06-20 17:45:47,175 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 41 changer transitions 0/118 dead transitions. [2024-06-20 17:45:47,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 118 transitions, 949 flow [2024-06-20 17:45:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:45:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:45:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-20 17:45:47,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962059620596206 [2024-06-20 17:45:47,177 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 643 flow. Second operand 9 states and 220 transitions. [2024-06-20 17:45:47,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 118 transitions, 949 flow [2024-06-20 17:45:47,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 869 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:47,199 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 653 flow [2024-06-20 17:45:47,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=653, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2024-06-20 17:45:47,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-20 17:45:47,200 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 653 flow [2024-06-20 17:45:47,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:47,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:47,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:47,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:45:47,201 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:47,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:47,201 INFO L85 PathProgramCache]: Analyzing trace with hash 714880792, now seen corresponding path program 1 times [2024-06-20 17:45:47,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:47,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404819870] [2024-06-20 17:45:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:47,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:47,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:47,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404819870] [2024-06-20 17:45:47,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404819870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:47,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:47,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:45:47,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005708247] [2024-06-20 17:45:47,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:47,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:45:47,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:47,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:45:47,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:45:47,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 17:45:47,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 653 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:47,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:47,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 17:45:47,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:47,856 INFO L124 PetriNetUnfolderBase]: 911/1565 cut-off events. [2024-06-20 17:45:47,856 INFO L125 PetriNetUnfolderBase]: For 12550/12550 co-relation queries the response was YES. [2024-06-20 17:45:47,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6923 conditions, 1565 events. 911/1565 cut-off events. For 12550/12550 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8181 event pairs, 293 based on Foata normal form. 2/1565 useless extension candidates. Maximal degree in co-relation 6891. Up to 1310 conditions per place. [2024-06-20 17:45:47,872 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 78 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2024-06-20 17:45:47,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 109 transitions, 961 flow [2024-06-20 17:45:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:45:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:45:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 17:45:47,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 17:45:47,874 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 653 flow. Second operand 5 states and 130 transitions. [2024-06-20 17:45:47,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 109 transitions, 961 flow [2024-06-20 17:45:47,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 109 transitions, 866 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:45:47,892 INFO L231 Difference]: Finished difference. Result has 83 places, 93 transitions, 667 flow [2024-06-20 17:45:47,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=667, PETRI_PLACES=83, PETRI_TRANSITIONS=93} [2024-06-20 17:45:47,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-20 17:45:47,894 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 93 transitions, 667 flow [2024-06-20 17:45:47,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:47,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:47,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:47,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:45:47,895 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)] === [2024-06-20 17:45:47,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash 45925781, now seen corresponding path program 1 times [2024-06-20 17:45:47,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:47,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674170712] [2024-06-20 17:45:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:47,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:48,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:48,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674170712] [2024-06-20 17:45:48,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674170712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:48,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:48,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:48,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281623145] [2024-06-20 17:45:48,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:48,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:48,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:48,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:48,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:48,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:48,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 93 transitions, 667 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:48,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:48,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:48,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:48,584 INFO L124 PetriNetUnfolderBase]: 996/1660 cut-off events. [2024-06-20 17:45:48,584 INFO L125 PetriNetUnfolderBase]: For 14614/14614 co-relation queries the response was YES. [2024-06-20 17:45:48,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7509 conditions, 1660 events. 996/1660 cut-off events. For 14614/14614 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8509 event pairs, 304 based on Foata normal form. 4/1659 useless extension candidates. Maximal degree in co-relation 7475. Up to 1416 conditions per place. [2024-06-20 17:45:48,598 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 87 selfloop transitions, 20 changer transitions 0/115 dead transitions. [2024-06-20 17:45:48,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 115 transitions, 949 flow [2024-06-20 17:45:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 17:45:48,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 17:45:48,600 INFO L175 Difference]: Start difference. First operand has 83 places, 93 transitions, 667 flow. Second operand 6 states and 150 transitions. [2024-06-20 17:45:48,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 115 transitions, 949 flow [2024-06-20 17:45:48,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 115 transitions, 933 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-20 17:45:48,621 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 720 flow [2024-06-20 17:45:48,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=720, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-20 17:45:48,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-20 17:45:48,622 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 720 flow [2024-06-20 17:45:48,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:48,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:48,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:48,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:45:48,623 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)] === [2024-06-20 17:45:48,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:48,623 INFO L85 PathProgramCache]: Analyzing trace with hash -203156119, now seen corresponding path program 2 times [2024-06-20 17:45:48,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:48,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871234216] [2024-06-20 17:45:48,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:48,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:48,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:48,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871234216] [2024-06-20 17:45:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871234216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:48,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:48,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661622981] [2024-06-20 17:45:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:48,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:48,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:48,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:48,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:48,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 720 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:48,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:48,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:48,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:49,265 INFO L124 PetriNetUnfolderBase]: 988/1653 cut-off events. [2024-06-20 17:45:49,266 INFO L125 PetriNetUnfolderBase]: For 16328/16328 co-relation queries the response was YES. [2024-06-20 17:45:49,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7733 conditions, 1653 events. 988/1653 cut-off events. For 16328/16328 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8519 event pairs, 273 based on Foata normal form. 4/1652 useless extension candidates. Maximal degree in co-relation 7696. Up to 1345 conditions per place. [2024-06-20 17:45:49,282 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 88 selfloop transitions, 22 changer transitions 0/118 dead transitions. [2024-06-20 17:45:49,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 118 transitions, 1014 flow [2024-06-20 17:45:49,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 17:45:49,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 17:45:49,285 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 720 flow. Second operand 6 states and 150 transitions. [2024-06-20 17:45:49,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 118 transitions, 1014 flow [2024-06-20 17:45:49,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 118 transitions, 963 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:49,307 INFO L231 Difference]: Finished difference. Result has 91 places, 97 transitions, 746 flow [2024-06-20 17:45:49,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=746, PETRI_PLACES=91, PETRI_TRANSITIONS=97} [2024-06-20 17:45:49,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 17:45:49,308 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 97 transitions, 746 flow [2024-06-20 17:45:49,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:49,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:49,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:49,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:45:49,309 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:49,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:49,309 INFO L85 PathProgramCache]: Analyzing trace with hash -270590088, now seen corresponding path program 2 times [2024-06-20 17:45:49,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:49,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864974087] [2024-06-20 17:45:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:49,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:49,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:49,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864974087] [2024-06-20 17:45:49,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864974087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:49,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:49,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:45:49,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239710776] [2024-06-20 17:45:49,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:49,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:45:49,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:49,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:45:49,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:45:49,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 17:45:49,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 97 transitions, 746 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:49,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:49,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 17:45:49,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:49,963 INFO L124 PetriNetUnfolderBase]: 914/1585 cut-off events. [2024-06-20 17:45:49,963 INFO L125 PetriNetUnfolderBase]: For 17415/17415 co-relation queries the response was YES. [2024-06-20 17:45:49,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7523 conditions, 1585 events. 914/1585 cut-off events. For 17415/17415 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8381 event pairs, 296 based on Foata normal form. 4/1587 useless extension candidates. Maximal degree in co-relation 7485. Up to 1321 conditions per place. [2024-06-20 17:45:49,978 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 79 selfloop transitions, 19 changer transitions 0/114 dead transitions. [2024-06-20 17:45:49,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 114 transitions, 1004 flow [2024-06-20 17:45:49,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:45:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:45:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-20 17:45:49,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676829268292683 [2024-06-20 17:45:49,979 INFO L175 Difference]: Start difference. First operand has 91 places, 97 transitions, 746 flow. Second operand 4 states and 111 transitions. [2024-06-20 17:45:49,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 114 transitions, 1004 flow [2024-06-20 17:45:50,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 114 transitions, 939 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:50,010 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 767 flow [2024-06-20 17:45:50,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=767, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2024-06-20 17:45:50,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 17:45:50,011 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 767 flow [2024-06-20 17:45:50,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:50,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:50,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:50,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:45:50,012 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)] === [2024-06-20 17:45:50,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:50,013 INFO L85 PathProgramCache]: Analyzing trace with hash 47155577, now seen corresponding path program 1 times [2024-06-20 17:45:50,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:50,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193290559] [2024-06-20 17:45:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:50,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:50,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:50,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193290559] [2024-06-20 17:45:50,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193290559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:50,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:50,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:45:50,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214217910] [2024-06-20 17:45:50,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:50,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:45:50,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:45:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:45:50,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:50,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 767 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:50,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:50,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:50,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:50,749 INFO L124 PetriNetUnfolderBase]: 1034/1727 cut-off events. [2024-06-20 17:45:50,750 INFO L125 PetriNetUnfolderBase]: For 20331/20331 co-relation queries the response was YES. [2024-06-20 17:45:50,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8543 conditions, 1727 events. 1034/1727 cut-off events. For 20331/20331 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8924 event pairs, 180 based on Foata normal form. 4/1729 useless extension candidates. Maximal degree in co-relation 8504. Up to 1443 conditions per place. [2024-06-20 17:45:50,765 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 105 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2024-06-20 17:45:50,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 134 transitions, 1209 flow [2024-06-20 17:45:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:45:50,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:45:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 17:45:50,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 17:45:50,767 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 767 flow. Second operand 7 states and 176 transitions. [2024-06-20 17:45:50,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 134 transitions, 1209 flow [2024-06-20 17:45:50,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 134 transitions, 1175 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:50,796 INFO L231 Difference]: Finished difference. Result has 96 places, 104 transitions, 838 flow [2024-06-20 17:45:50,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=838, PETRI_PLACES=96, PETRI_TRANSITIONS=104} [2024-06-20 17:45:50,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-20 17:45:50,797 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 104 transitions, 838 flow [2024-06-20 17:45:50,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:50,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:50,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:50,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:45:50,797 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)] === [2024-06-20 17:45:50,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:50,798 INFO L85 PathProgramCache]: Analyzing trace with hash 574536775, now seen corresponding path program 2 times [2024-06-20 17:45:50,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:50,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137539188] [2024-06-20 17:45:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:50,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:51,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:51,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137539188] [2024-06-20 17:45:51,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137539188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:51,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:51,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:45:51,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289830796] [2024-06-20 17:45:51,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:51,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:45:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:45:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:45:51,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:51,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 104 transitions, 838 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:51,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:51,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:51,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:51,557 INFO L124 PetriNetUnfolderBase]: 1026/1715 cut-off events. [2024-06-20 17:45:51,558 INFO L125 PetriNetUnfolderBase]: For 22153/22153 co-relation queries the response was YES. [2024-06-20 17:45:51,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8684 conditions, 1715 events. 1026/1715 cut-off events. For 22153/22153 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8864 event pairs, 264 based on Foata normal form. 4/1717 useless extension candidates. Maximal degree in co-relation 8644. Up to 1490 conditions per place. [2024-06-20 17:45:51,574 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 17 changer transitions 0/127 dead transitions. [2024-06-20 17:45:51,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 127 transitions, 1134 flow [2024-06-20 17:45:51,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 17:45:51,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-20 17:45:51,577 INFO L175 Difference]: Start difference. First operand has 96 places, 104 transitions, 838 flow. Second operand 6 states and 151 transitions. [2024-06-20 17:45:51,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 127 transitions, 1134 flow [2024-06-20 17:45:51,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 127 transitions, 1074 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:51,612 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 819 flow [2024-06-20 17:45:51,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=819, PETRI_PLACES=99, PETRI_TRANSITIONS=104} [2024-06-20 17:45:51,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-20 17:45:51,613 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 819 flow [2024-06-20 17:45:51,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:51,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:51,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:51,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:45:51,614 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)] === [2024-06-20 17:45:51,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:51,615 INFO L85 PathProgramCache]: Analyzing trace with hash 858263589, now seen corresponding path program 3 times [2024-06-20 17:45:51,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:51,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808478093] [2024-06-20 17:45:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:51,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:51,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:51,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808478093] [2024-06-20 17:45:51,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808478093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:51,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:51,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:45:51,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336752902] [2024-06-20 17:45:51,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:51,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:45:51,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:45:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:45:51,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:51,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 104 transitions, 819 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:51,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:51,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:51,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:52,347 INFO L124 PetriNetUnfolderBase]: 1043/1739 cut-off events. [2024-06-20 17:45:52,347 INFO L125 PetriNetUnfolderBase]: For 24710/24713 co-relation queries the response was YES. [2024-06-20 17:45:52,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8876 conditions, 1739 events. 1043/1739 cut-off events. For 24710/24713 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9026 event pairs, 276 based on Foata normal form. 4/1737 useless extension candidates. Maximal degree in co-relation 8834. Up to 1408 conditions per place. [2024-06-20 17:45:52,364 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 43 changer transitions 0/148 dead transitions. [2024-06-20 17:45:52,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 148 transitions, 1235 flow [2024-06-20 17:45:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:45:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:45:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-20 17:45:52,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024390243902439 [2024-06-20 17:45:52,366 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 819 flow. Second operand 10 states and 247 transitions. [2024-06-20 17:45:52,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 148 transitions, 1235 flow [2024-06-20 17:45:52,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 148 transitions, 1196 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 17:45:52,395 INFO L231 Difference]: Finished difference. Result has 104 places, 106 transitions, 907 flow [2024-06-20 17:45:52,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=907, PETRI_PLACES=104, PETRI_TRANSITIONS=106} [2024-06-20 17:45:52,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-20 17:45:52,396 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 106 transitions, 907 flow [2024-06-20 17:45:52,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:52,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:52,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:52,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:45:52,397 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:52,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash 190543555, now seen corresponding path program 1 times [2024-06-20 17:45:52,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:52,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587336263] [2024-06-20 17:45:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:52,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:52,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:52,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587336263] [2024-06-20 17:45:52,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587336263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:52,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:52,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:52,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706725385] [2024-06-20 17:45:52,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:52,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:52,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:52,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:52,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:52,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 17:45:52,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 907 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:52,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:52,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 17:45:52,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:53,069 INFO L124 PetriNetUnfolderBase]: 970/1673 cut-off events. [2024-06-20 17:45:53,070 INFO L125 PetriNetUnfolderBase]: For 26717/26726 co-relation queries the response was YES. [2024-06-20 17:45:53,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8869 conditions, 1673 events. 970/1673 cut-off events. For 26717/26726 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8922 event pairs, 265 based on Foata normal form. 4/1675 useless extension candidates. Maximal degree in co-relation 8826. Up to 1392 conditions per place. [2024-06-20 17:45:53,089 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 86 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2024-06-20 17:45:53,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 129 transitions, 1279 flow [2024-06-20 17:45:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 17:45:53,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 17:45:53,092 INFO L175 Difference]: Start difference. First operand has 104 places, 106 transitions, 907 flow. Second operand 6 states and 152 transitions. [2024-06-20 17:45:53,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 129 transitions, 1279 flow [2024-06-20 17:45:53,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 129 transitions, 1170 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 17:45:53,133 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 928 flow [2024-06-20 17:45:53,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=928, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-06-20 17:45:53,134 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-20 17:45:53,134 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 928 flow [2024-06-20 17:45:53,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:53,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:53,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:53,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:45:53,135 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)] === [2024-06-20 17:45:53,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:53,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2055438713, now seen corresponding path program 4 times [2024-06-20 17:45:53,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:53,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541737297] [2024-06-20 17:45:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:53,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:53,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:53,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541737297] [2024-06-20 17:45:53,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541737297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:53,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:53,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:45:53,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465830362] [2024-06-20 17:45:53,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:53,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:45:53,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:53,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:45:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:45:53,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:53,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 112 transitions, 928 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:53,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:53,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:53,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:53,934 INFO L124 PetriNetUnfolderBase]: 1103/1841 cut-off events. [2024-06-20 17:45:53,934 INFO L125 PetriNetUnfolderBase]: For 32881/32881 co-relation queries the response was YES. [2024-06-20 17:45:53,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9695 conditions, 1841 events. 1103/1841 cut-off events. For 32881/32881 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9745 event pairs, 280 based on Foata normal form. 20/1856 useless extension candidates. Maximal degree in co-relation 9651. Up to 1416 conditions per place. [2024-06-20 17:45:53,955 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 104 selfloop transitions, 40 changer transitions 0/152 dead transitions. [2024-06-20 17:45:53,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 152 transitions, 1360 flow [2024-06-20 17:45:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:45:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:45:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 17:45:53,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070460704607046 [2024-06-20 17:45:53,957 INFO L175 Difference]: Start difference. First operand has 102 places, 112 transitions, 928 flow. Second operand 9 states and 224 transitions. [2024-06-20 17:45:53,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 152 transitions, 1360 flow [2024-06-20 17:45:53,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 152 transitions, 1321 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:53,993 INFO L231 Difference]: Finished difference. Result has 109 places, 114 transitions, 1015 flow [2024-06-20 17:45:53,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=100, 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=9, PETRI_FLOW=1015, PETRI_PLACES=109, PETRI_TRANSITIONS=114} [2024-06-20 17:45:53,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-20 17:45:53,994 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 114 transitions, 1015 flow [2024-06-20 17:45:53,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:53,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:53,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:53,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:45:53,995 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:53,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:53,995 INFO L85 PathProgramCache]: Analyzing trace with hash 574328515, now seen corresponding path program 2 times [2024-06-20 17:45:53,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:53,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991574358] [2024-06-20 17:45:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:53,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:54,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:54,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991574358] [2024-06-20 17:45:54,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991574358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:54,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:54,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:54,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426201150] [2024-06-20 17:45:54,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:54,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:54,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:54,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:54,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:54,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 17:45:54,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 114 transitions, 1015 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:54,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:54,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 17:45:54,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:54,707 INFO L124 PetriNetUnfolderBase]: 1014/1751 cut-off events. [2024-06-20 17:45:54,707 INFO L125 PetriNetUnfolderBase]: For 31629/31638 co-relation queries the response was YES. [2024-06-20 17:45:54,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9541 conditions, 1751 events. 1014/1751 cut-off events. For 31629/31638 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9473 event pairs, 272 based on Foata normal form. 11/1760 useless extension candidates. Maximal degree in co-relation 9495. Up to 1485 conditions per place. [2024-06-20 17:45:54,728 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 91 selfloop transitions, 22 changer transitions 0/129 dead transitions. [2024-06-20 17:45:54,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 129 transitions, 1279 flow [2024-06-20 17:45:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:45:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:45:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 17:45:54,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-20 17:45:54,730 INFO L175 Difference]: Start difference. First operand has 109 places, 114 transitions, 1015 flow. Second operand 5 states and 131 transitions. [2024-06-20 17:45:54,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 129 transitions, 1279 flow [2024-06-20 17:45:54,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 129 transitions, 1173 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:45:54,782 INFO L231 Difference]: Finished difference. Result has 107 places, 114 transitions, 959 flow [2024-06-20 17:45:54,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=959, PETRI_PLACES=107, PETRI_TRANSITIONS=114} [2024-06-20 17:45:54,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-20 17:45:54,783 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 114 transitions, 959 flow [2024-06-20 17:45:54,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:54,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:54,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:54,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:45:54,784 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:54,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:54,784 INFO L85 PathProgramCache]: Analyzing trace with hash 397407423, now seen corresponding path program 1 times [2024-06-20 17:45:54,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:54,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875924511] [2024-06-20 17:45:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:54,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:55,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:55,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875924511] [2024-06-20 17:45:55,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875924511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:55,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:55,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:55,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234554302] [2024-06-20 17:45:55,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:55,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:55,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:55,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:55,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 114 transitions, 959 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:55,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:55,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:55,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:55,452 INFO L124 PetriNetUnfolderBase]: 1115/1872 cut-off events. [2024-06-20 17:45:55,452 INFO L125 PetriNetUnfolderBase]: For 33869/33869 co-relation queries the response was YES. [2024-06-20 17:45:55,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9938 conditions, 1872 events. 1115/1872 cut-off events. For 33869/33869 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9996 event pairs, 277 based on Foata normal form. 2/1869 useless extension candidates. Maximal degree in co-relation 9891. Up to 1576 conditions per place. [2024-06-20 17:45:55,469 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 109 selfloop transitions, 34 changer transitions 0/151 dead transitions. [2024-06-20 17:45:55,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 151 transitions, 1533 flow [2024-06-20 17:45:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 17:45:55,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 17:45:55,472 INFO L175 Difference]: Start difference. First operand has 107 places, 114 transitions, 959 flow. Second operand 6 states and 152 transitions. [2024-06-20 17:45:55,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 151 transitions, 1533 flow [2024-06-20 17:45:55,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 151 transitions, 1457 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 17:45:55,517 INFO L231 Difference]: Finished difference. Result has 111 places, 132 transitions, 1154 flow [2024-06-20 17:45:55,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1154, PETRI_PLACES=111, PETRI_TRANSITIONS=132} [2024-06-20 17:45:55,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-20 17:45:55,518 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 132 transitions, 1154 flow [2024-06-20 17:45:55,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:55,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:55,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:55,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:45:55,519 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:55,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash 397412073, now seen corresponding path program 2 times [2024-06-20 17:45:55,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:55,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590790346] [2024-06-20 17:45:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:55,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:55,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:55,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590790346] [2024-06-20 17:45:55,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590790346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:55,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:55,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:55,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504195070] [2024-06-20 17:45:55,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:55,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:55,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:55,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:55,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:55,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:55,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 1154 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:55,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:55,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:55,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:56,237 INFO L124 PetriNetUnfolderBase]: 1181/1989 cut-off events. [2024-06-20 17:45:56,238 INFO L125 PetriNetUnfolderBase]: For 38805/38805 co-relation queries the response was YES. [2024-06-20 17:45:56,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11100 conditions, 1989 events. 1181/1989 cut-off events. For 38805/38805 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10710 event pairs, 271 based on Foata normal form. 4/1991 useless extension candidates. Maximal degree in co-relation 11050. Up to 1733 conditions per place. [2024-06-20 17:45:56,260 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 126 selfloop transitions, 35 changer transitions 0/169 dead transitions. [2024-06-20 17:45:56,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 169 transitions, 1778 flow [2024-06-20 17:45:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:45:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:45:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 17:45:56,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:45:56,262 INFO L175 Difference]: Start difference. First operand has 111 places, 132 transitions, 1154 flow. Second operand 7 states and 168 transitions. [2024-06-20 17:45:56,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 169 transitions, 1778 flow [2024-06-20 17:45:56,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 169 transitions, 1730 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-06-20 17:45:56,327 INFO L231 Difference]: Finished difference. Result has 119 places, 152 transitions, 1435 flow [2024-06-20 17:45:56,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1435, PETRI_PLACES=119, PETRI_TRANSITIONS=152} [2024-06-20 17:45:56,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-20 17:45:56,328 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 152 transitions, 1435 flow [2024-06-20 17:45:56,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:56,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:56,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:56,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:45:56,329 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:56,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:56,330 INFO L85 PathProgramCache]: Analyzing trace with hash 245960603, now seen corresponding path program 3 times [2024-06-20 17:45:56,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:56,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928227070] [2024-06-20 17:45:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:56,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:56,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:56,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928227070] [2024-06-20 17:45:56,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928227070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:56,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:56,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:56,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183410318] [2024-06-20 17:45:56,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:56,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:56,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:56,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:56,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 152 transitions, 1435 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:56,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:56,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:56,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:57,007 INFO L124 PetriNetUnfolderBase]: 1229/2070 cut-off events. [2024-06-20 17:45:57,008 INFO L125 PetriNetUnfolderBase]: For 43916/43916 co-relation queries the response was YES. [2024-06-20 17:45:57,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12131 conditions, 2070 events. 1229/2070 cut-off events. For 43916/43916 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11244 event pairs, 271 based on Foata normal form. 4/2072 useless extension candidates. Maximal degree in co-relation 12077. Up to 1695 conditions per place. [2024-06-20 17:45:57,030 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 70 changer transitions 0/199 dead transitions. [2024-06-20 17:45:57,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 199 transitions, 2165 flow [2024-06-20 17:45:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:45:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:45:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 17:45:57,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-20 17:45:57,032 INFO L175 Difference]: Start difference. First operand has 119 places, 152 transitions, 1435 flow. Second operand 7 states and 183 transitions. [2024-06-20 17:45:57,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 199 transitions, 2165 flow [2024-06-20 17:45:57,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 199 transitions, 2068 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:57,088 INFO L231 Difference]: Finished difference. Result has 126 places, 171 transitions, 1810 flow [2024-06-20 17:45:57,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1810, PETRI_PLACES=126, PETRI_TRANSITIONS=171} [2024-06-20 17:45:57,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-20 17:45:57,089 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 171 transitions, 1810 flow [2024-06-20 17:45:57,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:57,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:57,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:57,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:45:57,090 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)] === [2024-06-20 17:45:57,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:57,091 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-20 17:45:57,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:57,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252661509] [2024-06-20 17:45:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:57,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:57,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:57,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252661509] [2024-06-20 17:45:57,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252661509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:57,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:57,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:57,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799260911] [2024-06-20 17:45:57,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:57,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:57,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:57,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:57,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:57,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 17:45:57,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 171 transitions, 1810 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:57,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:57,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 17:45:57,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:57,837 INFO L124 PetriNetUnfolderBase]: 1162/2001 cut-off events. [2024-06-20 17:45:57,837 INFO L125 PetriNetUnfolderBase]: For 47125/47125 co-relation queries the response was YES. [2024-06-20 17:45:57,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12419 conditions, 2001 events. 1162/2001 cut-off events. For 47125/47125 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11021 event pairs, 270 based on Foata normal form. 2/2001 useless extension candidates. Maximal degree in co-relation 12361. Up to 1647 conditions per place. [2024-06-20 17:45:57,861 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 142 selfloop transitions, 10 changer transitions 0/182 dead transitions. [2024-06-20 17:45:57,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 182 transitions, 2166 flow [2024-06-20 17:45:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:45:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:45:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-20 17:45:57,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-20 17:45:57,862 INFO L175 Difference]: Start difference. First operand has 126 places, 171 transitions, 1810 flow. Second operand 4 states and 103 transitions. [2024-06-20 17:45:57,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 182 transitions, 2166 flow [2024-06-20 17:45:57,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 182 transitions, 2075 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:57,952 INFO L231 Difference]: Finished difference. Result has 128 places, 173 transitions, 1778 flow [2024-06-20 17:45:57,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1778, PETRI_PLACES=128, PETRI_TRANSITIONS=173} [2024-06-20 17:45:57,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-20 17:45:57,956 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 173 transitions, 1778 flow [2024-06-20 17:45:57,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:57,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:57,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:57,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:45:57,957 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)] === [2024-06-20 17:45:57,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:57,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1461823642, now seen corresponding path program 1 times [2024-06-20 17:45:57,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:57,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946452452] [2024-06-20 17:45:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:57,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:58,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:58,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946452452] [2024-06-20 17:45:58,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946452452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:58,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:58,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:45:58,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178219077] [2024-06-20 17:45:58,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:58,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:45:58,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:58,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:45:58,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:45:58,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:58,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 173 transitions, 1778 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:58,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:58,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:58,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:58,752 INFO L124 PetriNetUnfolderBase]: 1351/2288 cut-off events. [2024-06-20 17:45:58,752 INFO L125 PetriNetUnfolderBase]: For 55461/55461 co-relation queries the response was YES. [2024-06-20 17:45:58,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13919 conditions, 2288 events. 1351/2288 cut-off events. For 55461/55461 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12938 event pairs, 175 based on Foata normal form. 12/2292 useless extension candidates. Maximal degree in co-relation 13859. Up to 1603 conditions per place. [2024-06-20 17:45:58,770 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 165 selfloop transitions, 35 changer transitions 0/208 dead transitions. [2024-06-20 17:45:58,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 208 transitions, 2418 flow [2024-06-20 17:45:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:45:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:45:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 17:45:58,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 17:45:58,771 INFO L175 Difference]: Start difference. First operand has 128 places, 173 transitions, 1778 flow. Second operand 7 states and 182 transitions. [2024-06-20 17:45:58,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 208 transitions, 2418 flow [2024-06-20 17:45:58,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 208 transitions, 2377 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:58,833 INFO L231 Difference]: Finished difference. Result has 133 places, 175 transitions, 1859 flow [2024-06-20 17:45:58,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1737, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1859, PETRI_PLACES=133, PETRI_TRANSITIONS=175} [2024-06-20 17:45:58,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-20 17:45:58,834 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 175 transitions, 1859 flow [2024-06-20 17:45:58,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:58,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:58,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:58,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:45:58,835 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)] === [2024-06-20 17:45:58,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash 822938266, now seen corresponding path program 2 times [2024-06-20 17:45:58,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:58,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279260620] [2024-06-20 17:45:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:58,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:59,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279260620] [2024-06-20 17:45:59,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279260620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:59,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:59,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:59,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640682303] [2024-06-20 17:45:59,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:59,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:45:59,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:45:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:45:59,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:59,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 1859 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:59,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:59,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:59,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:59,572 INFO L124 PetriNetUnfolderBase]: 1392/2359 cut-off events. [2024-06-20 17:45:59,572 INFO L125 PetriNetUnfolderBase]: For 59573/59573 co-relation queries the response was YES. [2024-06-20 17:45:59,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14544 conditions, 2359 events. 1392/2359 cut-off events. For 59573/59573 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13435 event pairs, 258 based on Foata normal form. 12/2363 useless extension candidates. Maximal degree in co-relation 14483. Up to 1737 conditions per place. [2024-06-20 17:45:59,589 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 32 changer transitions 0/204 dead transitions. [2024-06-20 17:45:59,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 204 transitions, 2463 flow [2024-06-20 17:45:59,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 17:45:59,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 17:45:59,590 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 1859 flow. Second operand 6 states and 159 transitions. [2024-06-20 17:45:59,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 204 transitions, 2463 flow [2024-06-20 17:45:59,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 204 transitions, 2419 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:59,663 INFO L231 Difference]: Finished difference. Result has 136 places, 176 transitions, 1909 flow [2024-06-20 17:45:59,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1909, PETRI_PLACES=136, PETRI_TRANSITIONS=176} [2024-06-20 17:45:59,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-20 17:45:59,664 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 176 transitions, 1909 flow [2024-06-20 17:45:59,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:59,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:59,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:59,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:45:59,664 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)] === [2024-06-20 17:45:59,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:59,665 INFO L85 PathProgramCache]: Analyzing trace with hash 823086136, now seen corresponding path program 3 times [2024-06-20 17:45:59,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:59,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922541598] [2024-06-20 17:45:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:59,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:59,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:59,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922541598] [2024-06-20 17:45:59,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922541598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:59,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:59,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:59,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018289913] [2024-06-20 17:45:59,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:59,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:45:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:45:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:45:59,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:45:59,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 176 transitions, 1909 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:59,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:59,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:45:59,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:00,369 INFO L124 PetriNetUnfolderBase]: 1364/2320 cut-off events. [2024-06-20 17:46:00,370 INFO L125 PetriNetUnfolderBase]: For 60105/60105 co-relation queries the response was YES. [2024-06-20 17:46:00,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14147 conditions, 2320 events. 1364/2320 cut-off events. For 60105/60105 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13178 event pairs, 252 based on Foata normal form. 16/2328 useless extension candidates. Maximal degree in co-relation 14084. Up to 1857 conditions per place. [2024-06-20 17:46:00,388 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 160 selfloop transitions, 31 changer transitions 0/199 dead transitions. [2024-06-20 17:46:00,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2367 flow [2024-06-20 17:46:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 17:46:00,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-20 17:46:00,390 INFO L175 Difference]: Start difference. First operand has 136 places, 176 transitions, 1909 flow. Second operand 6 states and 157 transitions. [2024-06-20 17:46:00,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2367 flow [2024-06-20 17:46:00,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 199 transitions, 2280 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:00,480 INFO L231 Difference]: Finished difference. Result has 138 places, 176 transitions, 1895 flow [2024-06-20 17:46:00,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1895, PETRI_PLACES=138, PETRI_TRANSITIONS=176} [2024-06-20 17:46:00,481 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-20 17:46:00,481 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 176 transitions, 1895 flow [2024-06-20 17:46:00,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:00,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:00,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:00,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:46:00,482 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:00,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:00,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1217777194, now seen corresponding path program 4 times [2024-06-20 17:46:00,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:00,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989343968] [2024-06-20 17:46:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:00,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:00,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:00,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989343968] [2024-06-20 17:46:00,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989343968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:00,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:00,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:00,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475510526] [2024-06-20 17:46:00,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:00,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:00,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:00,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:00,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:00,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:00,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 176 transitions, 1895 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:00,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:00,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:00,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:01,335 INFO L124 PetriNetUnfolderBase]: 1422/2408 cut-off events. [2024-06-20 17:46:01,335 INFO L125 PetriNetUnfolderBase]: For 63871/63871 co-relation queries the response was YES. [2024-06-20 17:46:01,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14623 conditions, 2408 events. 1422/2408 cut-off events. For 63871/63871 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13694 event pairs, 312 based on Foata normal form. 16/2419 useless extension candidates. Maximal degree in co-relation 14559. Up to 1941 conditions per place. [2024-06-20 17:46:01,355 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 42 changer transitions 0/219 dead transitions. [2024-06-20 17:46:01,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 219 transitions, 2465 flow [2024-06-20 17:46:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:46:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:46:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-20 17:46:01,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-20 17:46:01,357 INFO L175 Difference]: Start difference. First operand has 138 places, 176 transitions, 1895 flow. Second operand 10 states and 244 transitions. [2024-06-20 17:46:01,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 219 transitions, 2465 flow [2024-06-20 17:46:01,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 219 transitions, 2390 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:01,439 INFO L231 Difference]: Finished difference. Result has 143 places, 177 transitions, 1937 flow [2024-06-20 17:46:01,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1937, PETRI_PLACES=143, PETRI_TRANSITIONS=177} [2024-06-20 17:46:01,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-20 17:46:01,440 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 177 transitions, 1937 flow [2024-06-20 17:46:01,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:01,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:01,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:01,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:46:01,441 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:01,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:01,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1417078984, now seen corresponding path program 5 times [2024-06-20 17:46:01,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:01,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557677498] [2024-06-20 17:46:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:01,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:01,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557677498] [2024-06-20 17:46:01,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557677498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:01,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:01,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:01,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262029063] [2024-06-20 17:46:01,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:01,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:01,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:01,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:01,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:01,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:01,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 177 transitions, 1937 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:01,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:01,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:01,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:02,266 INFO L124 PetriNetUnfolderBase]: 1480/2526 cut-off events. [2024-06-20 17:46:02,266 INFO L125 PetriNetUnfolderBase]: For 68782/68782 co-relation queries the response was YES. [2024-06-20 17:46:02,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15284 conditions, 2526 events. 1480/2526 cut-off events. For 68782/68782 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14659 event pairs, 332 based on Foata normal form. 16/2537 useless extension candidates. Maximal degree in co-relation 15219. Up to 2039 conditions per place. [2024-06-20 17:46:02,288 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 171 selfloop transitions, 37 changer transitions 0/216 dead transitions. [2024-06-20 17:46:02,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 216 transitions, 2493 flow [2024-06-20 17:46:02,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 17:46:02,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 17:46:02,289 INFO L175 Difference]: Start difference. First operand has 143 places, 177 transitions, 1937 flow. Second operand 9 states and 222 transitions. [2024-06-20 17:46:02,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 216 transitions, 2493 flow [2024-06-20 17:46:02,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 216 transitions, 2396 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 17:46:02,377 INFO L231 Difference]: Finished difference. Result has 144 places, 178 transitions, 1949 flow [2024-06-20 17:46:02,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1840, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1949, PETRI_PLACES=144, PETRI_TRANSITIONS=178} [2024-06-20 17:46:02,377 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-20 17:46:02,378 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 178 transitions, 1949 flow [2024-06-20 17:46:02,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:02,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:02,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:02,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:46:02,378 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:02,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:02,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1417226854, now seen corresponding path program 6 times [2024-06-20 17:46:02,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:02,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876798044] [2024-06-20 17:46:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:02,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:02,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:02,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876798044] [2024-06-20 17:46:02,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876798044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:02,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:02,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:02,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932049402] [2024-06-20 17:46:02,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:02,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:02,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:02,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:02,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:02,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:02,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 178 transitions, 1949 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:02,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:02,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:02,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:03,176 INFO L124 PetriNetUnfolderBase]: 1496/2558 cut-off events. [2024-06-20 17:46:03,176 INFO L125 PetriNetUnfolderBase]: For 69239/69239 co-relation queries the response was YES. [2024-06-20 17:46:03,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15320 conditions, 2558 events. 1496/2558 cut-off events. For 69239/69239 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14897 event pairs, 325 based on Foata normal form. 12/2565 useless extension candidates. Maximal degree in co-relation 15254. Up to 1772 conditions per place. [2024-06-20 17:46:03,195 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 171 selfloop transitions, 41 changer transitions 0/220 dead transitions. [2024-06-20 17:46:03,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 220 transitions, 2529 flow [2024-06-20 17:46:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 17:46:03,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070460704607046 [2024-06-20 17:46:03,197 INFO L175 Difference]: Start difference. First operand has 144 places, 178 transitions, 1949 flow. Second operand 9 states and 224 transitions. [2024-06-20 17:46:03,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 220 transitions, 2529 flow [2024-06-20 17:46:03,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 220 transitions, 2440 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:03,291 INFO L231 Difference]: Finished difference. Result has 146 places, 179 transitions, 1979 flow [2024-06-20 17:46:03,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1979, PETRI_PLACES=146, PETRI_TRANSITIONS=179} [2024-06-20 17:46:03,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-20 17:46:03,292 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 179 transitions, 1979 flow [2024-06-20 17:46:03,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:03,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:03,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:03,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:46:03,292 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:03,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1210152682, now seen corresponding path program 1 times [2024-06-20 17:46:03,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:03,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312852047] [2024-06-20 17:46:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:03,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:03,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:03,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312852047] [2024-06-20 17:46:03,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312852047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:03,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:03,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:03,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289110871] [2024-06-20 17:46:03,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:03,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:03,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:03,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:03,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 179 transitions, 1979 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:03,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:03,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:03,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:04,053 INFO L124 PetriNetUnfolderBase]: 1537/2639 cut-off events. [2024-06-20 17:46:04,053 INFO L125 PetriNetUnfolderBase]: For 73559/73559 co-relation queries the response was YES. [2024-06-20 17:46:04,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15781 conditions, 2639 events. 1537/2639 cut-off events. For 73559/73559 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15597 event pairs, 299 based on Foata normal form. 12/2646 useless extension candidates. Maximal degree in co-relation 15714. Up to 1853 conditions per place. [2024-06-20 17:46:04,074 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 48 changer transitions 0/225 dead transitions. [2024-06-20 17:46:04,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 225 transitions, 2585 flow [2024-06-20 17:46:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:46:04,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:46:04,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-20 17:46:04,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024390243902439 [2024-06-20 17:46:04,076 INFO L175 Difference]: Start difference. First operand has 146 places, 179 transitions, 1979 flow. Second operand 10 states and 247 transitions. [2024-06-20 17:46:04,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 225 transitions, 2585 flow [2024-06-20 17:46:04,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 225 transitions, 2484 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:04,167 INFO L231 Difference]: Finished difference. Result has 149 places, 180 transitions, 2012 flow [2024-06-20 17:46:04,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2012, PETRI_PLACES=149, PETRI_TRANSITIONS=180} [2024-06-20 17:46:04,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-20 17:46:04,167 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 180 transitions, 2012 flow [2024-06-20 17:46:04,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:04,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:04,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:04,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:46:04,168 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)] === [2024-06-20 17:46:04,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:04,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1444518573, now seen corresponding path program 1 times [2024-06-20 17:46:04,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:04,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564641278] [2024-06-20 17:46:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:04,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:04,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:04,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564641278] [2024-06-20 17:46:04,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564641278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:04,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:04,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:46:04,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215597062] [2024-06-20 17:46:04,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:04,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:46:04,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:04,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:46:04,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:46:04,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:04,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 180 transitions, 2012 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:04,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:04,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:04,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:04,899 INFO L124 PetriNetUnfolderBase]: 1558/2669 cut-off events. [2024-06-20 17:46:04,899 INFO L125 PetriNetUnfolderBase]: For 73638/73641 co-relation queries the response was YES. [2024-06-20 17:46:04,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16148 conditions, 2669 events. 1558/2669 cut-off events. For 73638/73641 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15805 event pairs, 368 based on Foata normal form. 1/2663 useless extension candidates. Maximal degree in co-relation 16080. Up to 2261 conditions per place. [2024-06-20 17:46:04,931 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 61 changer transitions 0/214 dead transitions. [2024-06-20 17:46:04,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 214 transitions, 2839 flow [2024-06-20 17:46:04,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:04,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 17:46:04,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 17:46:04,933 INFO L175 Difference]: Start difference. First operand has 149 places, 180 transitions, 2012 flow. Second operand 6 states and 156 transitions. [2024-06-20 17:46:04,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 214 transitions, 2839 flow [2024-06-20 17:46:05,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 214 transitions, 2721 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 17:46:05,074 INFO L231 Difference]: Finished difference. Result has 148 places, 192 transitions, 2223 flow [2024-06-20 17:46:05,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2223, PETRI_PLACES=148, PETRI_TRANSITIONS=192} [2024-06-20 17:46:05,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-20 17:46:05,075 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 192 transitions, 2223 flow [2024-06-20 17:46:05,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:05,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:05,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:05,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:46:05,076 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)] === [2024-06-20 17:46:05,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash -40452925, now seen corresponding path program 2 times [2024-06-20 17:46:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:05,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361065676] [2024-06-20 17:46:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:05,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:05,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361065676] [2024-06-20 17:46:05,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361065676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:05,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:05,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:46:05,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093599399] [2024-06-20 17:46:05,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:05,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:46:05,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:46:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:46:05,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:05,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 192 transitions, 2223 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:05,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:05,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:05,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:05,807 INFO L124 PetriNetUnfolderBase]: 1563/2678 cut-off events. [2024-06-20 17:46:05,808 INFO L125 PetriNetUnfolderBase]: For 76130/76133 co-relation queries the response was YES. [2024-06-20 17:46:05,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16230 conditions, 2678 events. 1563/2678 cut-off events. For 76130/76133 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15833 event pairs, 368 based on Foata normal form. 1/2672 useless extension candidates. Maximal degree in co-relation 16160. Up to 2268 conditions per place. [2024-06-20 17:46:05,829 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 142 selfloop transitions, 64 changer transitions 0/214 dead transitions. [2024-06-20 17:46:05,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 214 transitions, 2924 flow [2024-06-20 17:46:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:05,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 17:46:05,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 17:46:05,830 INFO L175 Difference]: Start difference. First operand has 148 places, 192 transitions, 2223 flow. Second operand 6 states and 154 transitions. [2024-06-20 17:46:05,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 214 transitions, 2924 flow [2024-06-20 17:46:05,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 214 transitions, 2843 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-20 17:46:05,924 INFO L231 Difference]: Finished difference. Result has 153 places, 195 transitions, 2315 flow [2024-06-20 17:46:05,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2315, PETRI_PLACES=153, PETRI_TRANSITIONS=195} [2024-06-20 17:46:05,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-20 17:46:05,925 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 195 transitions, 2315 flow [2024-06-20 17:46:05,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:05,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:05,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:05,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:46:05,925 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:05,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash -579716730, now seen corresponding path program 2 times [2024-06-20 17:46:05,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:05,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397118906] [2024-06-20 17:46:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:05,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:06,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:06,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397118906] [2024-06-20 17:46:06,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397118906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:06,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:06,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:06,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457895962] [2024-06-20 17:46:06,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:06,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:06,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:06,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:06,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:06,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:06,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 195 transitions, 2315 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:06,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:06,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:06,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:06,750 INFO L124 PetriNetUnfolderBase]: 1604/2753 cut-off events. [2024-06-20 17:46:06,750 INFO L125 PetriNetUnfolderBase]: For 86880/86880 co-relation queries the response was YES. [2024-06-20 17:46:06,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16765 conditions, 2753 events. 1604/2753 cut-off events. For 86880/86880 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16501 event pairs, 353 based on Foata normal form. 12/2760 useless extension candidates. Maximal degree in co-relation 16693. Up to 2144 conditions per place. [2024-06-20 17:46:06,771 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 190 selfloop transitions, 43 changer transitions 0/241 dead transitions. [2024-06-20 17:46:06,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 241 transitions, 2955 flow [2024-06-20 17:46:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:46:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:46:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-20 17:46:06,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-20 17:46:06,774 INFO L175 Difference]: Start difference. First operand has 153 places, 195 transitions, 2315 flow. Second operand 10 states and 248 transitions. [2024-06-20 17:46:06,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 241 transitions, 2955 flow [2024-06-20 17:46:06,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 241 transitions, 2826 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:06,896 INFO L231 Difference]: Finished difference. Result has 161 places, 196 transitions, 2312 flow [2024-06-20 17:46:06,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2312, PETRI_PLACES=161, PETRI_TRANSITIONS=196} [2024-06-20 17:46:06,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-20 17:46:06,896 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 196 transitions, 2312 flow [2024-06-20 17:46:06,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:06,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:06,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:06,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:46:06,897 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:06,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1746880436, now seen corresponding path program 3 times [2024-06-20 17:46:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:06,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462545642] [2024-06-20 17:46:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:06,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:07,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:07,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462545642] [2024-06-20 17:46:07,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462545642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:07,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:07,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:07,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171663953] [2024-06-20 17:46:07,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:07,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:07,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:07,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:07,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:07,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 196 transitions, 2312 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:07,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:07,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:07,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:07,639 INFO L124 PetriNetUnfolderBase]: 1584/2731 cut-off events. [2024-06-20 17:46:07,640 INFO L125 PetriNetUnfolderBase]: For 85256/85256 co-relation queries the response was YES. [2024-06-20 17:46:07,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16318 conditions, 2731 events. 1584/2731 cut-off events. For 85256/85256 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16415 event pairs, 298 based on Foata normal form. 12/2738 useless extension candidates. Maximal degree in co-relation 16245. Up to 1455 conditions per place. [2024-06-20 17:46:07,663 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 179 selfloop transitions, 50 changer transitions 0/237 dead transitions. [2024-06-20 17:46:07,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 237 transitions, 2848 flow [2024-06-20 17:46:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 17:46:07,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070460704607046 [2024-06-20 17:46:07,665 INFO L175 Difference]: Start difference. First operand has 161 places, 196 transitions, 2312 flow. Second operand 9 states and 224 transitions. [2024-06-20 17:46:07,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 237 transitions, 2848 flow [2024-06-20 17:46:07,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 237 transitions, 2724 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-20 17:46:07,785 INFO L231 Difference]: Finished difference. Result has 161 places, 195 transitions, 2240 flow [2024-06-20 17:46:07,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2240, PETRI_PLACES=161, PETRI_TRANSITIONS=195} [2024-06-20 17:46:07,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-20 17:46:07,786 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 195 transitions, 2240 flow [2024-06-20 17:46:07,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:07,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:07,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:07,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:46:07,787 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)] === [2024-06-20 17:46:07,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:07,787 INFO L85 PathProgramCache]: Analyzing trace with hash -577515627, now seen corresponding path program 3 times [2024-06-20 17:46:07,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:07,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474061594] [2024-06-20 17:46:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:07,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:08,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:08,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474061594] [2024-06-20 17:46:08,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474061594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:08,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:08,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:46:08,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841425362] [2024-06-20 17:46:08,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:08,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:46:08,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:46:08,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:46:08,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:08,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 195 transitions, 2240 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:08,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:08,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:08,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:08,406 INFO L124 PetriNetUnfolderBase]: 1578/2713 cut-off events. [2024-06-20 17:46:08,406 INFO L125 PetriNetUnfolderBase]: For 74396/74396 co-relation queries the response was YES. [2024-06-20 17:46:08,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15863 conditions, 2713 events. 1578/2713 cut-off events. For 74396/74396 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16220 event pairs, 357 based on Foata normal form. 2/2710 useless extension candidates. Maximal degree in co-relation 15789. Up to 2302 conditions per place. [2024-06-20 17:46:08,429 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 60 changer transitions 0/213 dead transitions. [2024-06-20 17:46:08,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 213 transitions, 2834 flow [2024-06-20 17:46:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:08,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 17:46:08,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-20 17:46:08,430 INFO L175 Difference]: Start difference. First operand has 161 places, 195 transitions, 2240 flow. Second operand 6 states and 151 transitions. [2024-06-20 17:46:08,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 213 transitions, 2834 flow [2024-06-20 17:46:08,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 213 transitions, 2661 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-20 17:46:08,548 INFO L231 Difference]: Finished difference. Result has 159 places, 195 transitions, 2194 flow [2024-06-20 17:46:08,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2194, PETRI_PLACES=159, PETRI_TRANSITIONS=195} [2024-06-20 17:46:08,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-20 17:46:08,549 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 195 transitions, 2194 flow [2024-06-20 17:46:08,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:08,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:08,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:08,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:46:08,549 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)] === [2024-06-20 17:46:08,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:08,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1949712695, now seen corresponding path program 4 times [2024-06-20 17:46:08,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:08,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467120501] [2024-06-20 17:46:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:08,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:08,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:08,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467120501] [2024-06-20 17:46:08,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467120501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:08,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:08,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:46:08,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360757039] [2024-06-20 17:46:08,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:08,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:46:08,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:46:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:46:08,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:08,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 195 transitions, 2194 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:08,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:08,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:09,233 INFO L124 PetriNetUnfolderBase]: 1562/2692 cut-off events. [2024-06-20 17:46:09,233 INFO L125 PetriNetUnfolderBase]: For 74212/74212 co-relation queries the response was YES. [2024-06-20 17:46:09,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15221 conditions, 2692 events. 1562/2692 cut-off events. For 74212/74212 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16110 event pairs, 349 based on Foata normal form. 4/2694 useless extension candidates. Maximal degree in co-relation 15147. Up to 2383 conditions per place. [2024-06-20 17:46:09,254 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 37 changer transitions 0/210 dead transitions. [2024-06-20 17:46:09,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 210 transitions, 2641 flow [2024-06-20 17:46:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:09,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 17:46:09,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-20 17:46:09,256 INFO L175 Difference]: Start difference. First operand has 159 places, 195 transitions, 2194 flow. Second operand 7 states and 166 transitions. [2024-06-20 17:46:09,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 210 transitions, 2641 flow [2024-06-20 17:46:09,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 210 transitions, 2549 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:09,399 INFO L231 Difference]: Finished difference. Result has 164 places, 195 transitions, 2191 flow [2024-06-20 17:46:09,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2191, PETRI_PLACES=164, PETRI_TRANSITIONS=195} [2024-06-20 17:46:09,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-20 17:46:09,400 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 195 transitions, 2191 flow [2024-06-20 17:46:09,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:09,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:09,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:09,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:46:09,400 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)] === [2024-06-20 17:46:09,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2135466441, now seen corresponding path program 5 times [2024-06-20 17:46:09,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:09,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091186879] [2024-06-20 17:46:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:09,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:09,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:09,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091186879] [2024-06-20 17:46:09,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091186879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:09,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:09,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:46:09,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394539170] [2024-06-20 17:46:09,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:09,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:46:09,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:09,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:46:09,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:46:09,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:09,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 195 transitions, 2191 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:09,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:09,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:09,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:10,086 INFO L124 PetriNetUnfolderBase]: 1564/2698 cut-off events. [2024-06-20 17:46:10,086 INFO L125 PetriNetUnfolderBase]: For 75929/75932 co-relation queries the response was YES. [2024-06-20 17:46:10,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15227 conditions, 2698 events. 1564/2698 cut-off events. For 75929/75932 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16164 event pairs, 357 based on Foata normal form. 4/2699 useless extension candidates. Maximal degree in co-relation 15152. Up to 2275 conditions per place. [2024-06-20 17:46:10,106 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 138 selfloop transitions, 75 changer transitions 0/221 dead transitions. [2024-06-20 17:46:10,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 221 transitions, 2801 flow [2024-06-20 17:46:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 17:46:10,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-20 17:46:10,109 INFO L175 Difference]: Start difference. First operand has 164 places, 195 transitions, 2191 flow. Second operand 6 states and 160 transitions. [2024-06-20 17:46:10,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 221 transitions, 2801 flow [2024-06-20 17:46:10,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 221 transitions, 2715 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:10,240 INFO L231 Difference]: Finished difference. Result has 164 places, 198 transitions, 2321 flow [2024-06-20 17:46:10,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2321, PETRI_PLACES=164, PETRI_TRANSITIONS=198} [2024-06-20 17:46:10,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-20 17:46:10,241 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 198 transitions, 2321 flow [2024-06-20 17:46:10,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:10,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:10,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:10,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:46:10,242 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)] === [2024-06-20 17:46:10,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:10,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2128800201, now seen corresponding path program 6 times [2024-06-20 17:46:10,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:10,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072236274] [2024-06-20 17:46:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:10,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:10,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:10,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072236274] [2024-06-20 17:46:10,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072236274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:10,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:10,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:46:10,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90478134] [2024-06-20 17:46:10,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:10,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:46:10,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:10,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:46:10,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:46:10,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:10,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 198 transitions, 2321 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:10,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:10,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:10,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:11,056 INFO L124 PetriNetUnfolderBase]: 1548/2673 cut-off events. [2024-06-20 17:46:11,056 INFO L125 PetriNetUnfolderBase]: For 77854/77854 co-relation queries the response was YES. [2024-06-20 17:46:11,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15146 conditions, 2673 events. 1548/2673 cut-off events. For 77854/77854 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16013 event pairs, 349 based on Foata normal form. 4/2675 useless extension candidates. Maximal degree in co-relation 15070. Up to 2259 conditions per place. [2024-06-20 17:46:11,078 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 141 selfloop transitions, 75 changer transitions 0/224 dead transitions. [2024-06-20 17:46:11,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 224 transitions, 2819 flow [2024-06-20 17:46:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 17:46:11,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 17:46:11,080 INFO L175 Difference]: Start difference. First operand has 164 places, 198 transitions, 2321 flow. Second operand 7 states and 182 transitions. [2024-06-20 17:46:11,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 224 transitions, 2819 flow [2024-06-20 17:46:11,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 224 transitions, 2665 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:11,214 INFO L231 Difference]: Finished difference. Result has 168 places, 198 transitions, 2349 flow [2024-06-20 17:46:11,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2349, PETRI_PLACES=168, PETRI_TRANSITIONS=198} [2024-06-20 17:46:11,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-20 17:46:11,215 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 198 transitions, 2349 flow [2024-06-20 17:46:11,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:11,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:11,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:11,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:46:11,216 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)] === [2024-06-20 17:46:11,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:11,216 INFO L85 PathProgramCache]: Analyzing trace with hash -568845454, now seen corresponding path program 1 times [2024-06-20 17:46:11,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:11,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696518165] [2024-06-20 17:46:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:11,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:11,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:11,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696518165] [2024-06-20 17:46:11,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696518165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:11,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:11,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:11,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598543101] [2024-06-20 17:46:11,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:11,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:11,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:11,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:11,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:11,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:11,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 198 transitions, 2349 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:11,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:11,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:11,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:11,898 INFO L124 PetriNetUnfolderBase]: 1566/2681 cut-off events. [2024-06-20 17:46:11,899 INFO L125 PetriNetUnfolderBase]: For 80646/80646 co-relation queries the response was YES. [2024-06-20 17:46:11,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15456 conditions, 2681 events. 1566/2681 cut-off events. For 80646/80646 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15938 event pairs, 357 based on Foata normal form. 2/2678 useless extension candidates. Maximal degree in co-relation 15379. Up to 2187 conditions per place. [2024-06-20 17:46:11,920 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 95 changer transitions 0/234 dead transitions. [2024-06-20 17:46:11,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 234 transitions, 3191 flow [2024-06-20 17:46:11,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 17:46:11,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 17:46:11,921 INFO L175 Difference]: Start difference. First operand has 168 places, 198 transitions, 2349 flow. Second operand 7 states and 174 transitions. [2024-06-20 17:46:11,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 234 transitions, 3191 flow [2024-06-20 17:46:12,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 234 transitions, 2955 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 17:46:12,052 INFO L231 Difference]: Finished difference. Result has 168 places, 215 transitions, 2604 flow [2024-06-20 17:46:12,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2604, PETRI_PLACES=168, PETRI_TRANSITIONS=215} [2024-06-20 17:46:12,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-20 17:46:12,053 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 215 transitions, 2604 flow [2024-06-20 17:46:12,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:12,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:12,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:12,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:46:12,053 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)] === [2024-06-20 17:46:12,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:12,054 INFO L85 PathProgramCache]: Analyzing trace with hash -565126384, now seen corresponding path program 2 times [2024-06-20 17:46:12,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:12,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233653085] [2024-06-20 17:46:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:12,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:12,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:12,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233653085] [2024-06-20 17:46:12,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233653085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:12,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:12,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:12,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064477728] [2024-06-20 17:46:12,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:12,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:12,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:12,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:12,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:12,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:12,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 215 transitions, 2604 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:12,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:12,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:12,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:12,836 INFO L124 PetriNetUnfolderBase]: 1600/2744 cut-off events. [2024-06-20 17:46:12,836 INFO L125 PetriNetUnfolderBase]: For 80661/80661 co-relation queries the response was YES. [2024-06-20 17:46:12,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16323 conditions, 2744 events. 1600/2744 cut-off events. For 80661/80661 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 16413 event pairs, 348 based on Foata normal form. 2/2744 useless extension candidates. Maximal degree in co-relation 16245. Up to 2415 conditions per place. [2024-06-20 17:46:12,861 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 189 selfloop transitions, 47 changer transitions 0/244 dead transitions. [2024-06-20 17:46:12,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 244 transitions, 3443 flow [2024-06-20 17:46:12,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 17:46:12,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 17:46:12,866 INFO L175 Difference]: Start difference. First operand has 168 places, 215 transitions, 2604 flow. Second operand 8 states and 188 transitions. [2024-06-20 17:46:12,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 244 transitions, 3443 flow [2024-06-20 17:46:13,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 244 transitions, 3370 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-20 17:46:13,018 INFO L231 Difference]: Finished difference. Result has 176 places, 226 transitions, 2831 flow [2024-06-20 17:46:13,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2831, PETRI_PLACES=176, PETRI_TRANSITIONS=226} [2024-06-20 17:46:13,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-20 17:46:13,019 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 226 transitions, 2831 flow [2024-06-20 17:46:13,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:13,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:13,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:13,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:46:13,019 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)] === [2024-06-20 17:46:13,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2128791118, now seen corresponding path program 3 times [2024-06-20 17:46:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:13,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254438500] [2024-06-20 17:46:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:13,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:13,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:13,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254438500] [2024-06-20 17:46:13,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254438500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:13,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:13,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:13,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326205619] [2024-06-20 17:46:13,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:13,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:13,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:13,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:13,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:13,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:13,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 226 transitions, 2831 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:13,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:13,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:13,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:13,824 INFO L124 PetriNetUnfolderBase]: 1626/2787 cut-off events. [2024-06-20 17:46:13,824 INFO L125 PetriNetUnfolderBase]: For 85219/85219 co-relation queries the response was YES. [2024-06-20 17:46:13,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16620 conditions, 2787 events. 1626/2787 cut-off events. For 85219/85219 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16703 event pairs, 348 based on Foata normal form. 2/2787 useless extension candidates. Maximal degree in co-relation 16538. Up to 2318 conditions per place. [2024-06-20 17:46:13,844 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 99 changer transitions 0/266 dead transitions. [2024-06-20 17:46:13,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 266 transitions, 3750 flow [2024-06-20 17:46:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 17:46:13,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 17:46:13,845 INFO L175 Difference]: Start difference. First operand has 176 places, 226 transitions, 2831 flow. Second operand 8 states and 203 transitions. [2024-06-20 17:46:13,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 266 transitions, 3750 flow [2024-06-20 17:46:13,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 266 transitions, 3669 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:13,998 INFO L231 Difference]: Finished difference. Result has 183 places, 237 transitions, 3215 flow [2024-06-20 17:46:13,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3215, PETRI_PLACES=183, PETRI_TRANSITIONS=237} [2024-06-20 17:46:13,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-20 17:46:13,998 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 237 transitions, 3215 flow [2024-06-20 17:46:13,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:13,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:13,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:13,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:46:13,999 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)] === [2024-06-20 17:46:13,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:13,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1748574236, now seen corresponding path program 1 times [2024-06-20 17:46:13,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:13,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250672304] [2024-06-20 17:46:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:14,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:14,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:14,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250672304] [2024-06-20 17:46:14,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250672304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:14,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:14,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:14,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155351525] [2024-06-20 17:46:14,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:14,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:14,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:14,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:14,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:14,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 237 transitions, 3215 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:14,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:14,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:14,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:14,675 INFO L124 PetriNetUnfolderBase]: 1647/2815 cut-off events. [2024-06-20 17:46:14,675 INFO L125 PetriNetUnfolderBase]: For 92691/92694 co-relation queries the response was YES. [2024-06-20 17:46:14,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17537 conditions, 2815 events. 1647/2815 cut-off events. For 92691/92694 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16888 event pairs, 382 based on Foata normal form. 1/2808 useless extension candidates. Maximal degree in co-relation 17451. Up to 2265 conditions per place. [2024-06-20 17:46:14,702 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 135 selfloop transitions, 126 changer transitions 0/269 dead transitions. [2024-06-20 17:46:14,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 269 transitions, 4225 flow [2024-06-20 17:46:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 17:46:14,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 17:46:14,703 INFO L175 Difference]: Start difference. First operand has 183 places, 237 transitions, 3215 flow. Second operand 7 states and 177 transitions. [2024-06-20 17:46:14,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 269 transitions, 4225 flow [2024-06-20 17:46:14,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 269 transitions, 4128 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:14,925 INFO L231 Difference]: Finished difference. Result has 188 places, 246 transitions, 3574 flow [2024-06-20 17:46:14,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3136, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3574, PETRI_PLACES=188, PETRI_TRANSITIONS=246} [2024-06-20 17:46:14,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-20 17:46:14,925 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 246 transitions, 3574 flow [2024-06-20 17:46:14,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:14,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:14,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:14,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:46:14,926 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)] === [2024-06-20 17:46:14,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:14,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2051183352, now seen corresponding path program 1 times [2024-06-20 17:46:14,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:14,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304397672] [2024-06-20 17:46:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:14,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:15,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:15,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304397672] [2024-06-20 17:46:15,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304397672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:15,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:15,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:15,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792814829] [2024-06-20 17:46:15,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:15,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:15,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:15,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:15,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:15,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:15,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 246 transitions, 3574 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:15,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:15,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:15,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:15,663 INFO L124 PetriNetUnfolderBase]: 1652/2827 cut-off events. [2024-06-20 17:46:15,663 INFO L125 PetriNetUnfolderBase]: For 93714/93717 co-relation queries the response was YES. [2024-06-20 17:46:15,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17886 conditions, 2827 events. 1652/2827 cut-off events. For 93714/93717 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16991 event pairs, 368 based on Foata normal form. 1/2821 useless extension candidates. Maximal degree in co-relation 17798. Up to 2412 conditions per place. [2024-06-20 17:46:15,690 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 67 changer transitions 0/271 dead transitions. [2024-06-20 17:46:15,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 271 transitions, 4361 flow [2024-06-20 17:46:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 17:46:15,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 17:46:15,691 INFO L175 Difference]: Start difference. First operand has 188 places, 246 transitions, 3574 flow. Second operand 7 states and 173 transitions. [2024-06-20 17:46:15,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 271 transitions, 4361 flow [2024-06-20 17:46:15,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 271 transitions, 4149 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:15,890 INFO L231 Difference]: Finished difference. Result has 192 places, 249 transitions, 3549 flow [2024-06-20 17:46:15,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3549, PETRI_PLACES=192, PETRI_TRANSITIONS=249} [2024-06-20 17:46:15,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-20 17:46:15,891 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 249 transitions, 3549 flow [2024-06-20 17:46:15,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:15,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:15,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:15,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:46:15,891 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)] === [2024-06-20 17:46:15,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:15,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1571442716, now seen corresponding path program 2 times [2024-06-20 17:46:15,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:15,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011922366] [2024-06-20 17:46:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:16,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:16,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011922366] [2024-06-20 17:46:16,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011922366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:16,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:16,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:16,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747600182] [2024-06-20 17:46:16,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:16,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:16,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:16,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 249 transitions, 3549 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:16,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:16,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:16,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:16,586 INFO L124 PetriNetUnfolderBase]: 1665/2846 cut-off events. [2024-06-20 17:46:16,586 INFO L125 PetriNetUnfolderBase]: For 99028/99031 co-relation queries the response was YES. [2024-06-20 17:46:16,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18024 conditions, 2846 events. 1665/2846 cut-off events. For 99028/99031 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17088 event pairs, 384 based on Foata normal form. 1/2839 useless extension candidates. Maximal degree in co-relation 17935. Up to 2282 conditions per place. [2024-06-20 17:46:16,620 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 136 selfloop transitions, 132 changer transitions 0/276 dead transitions. [2024-06-20 17:46:16,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 276 transitions, 4575 flow [2024-06-20 17:46:16,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 17:46:16,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 17:46:16,621 INFO L175 Difference]: Start difference. First operand has 192 places, 249 transitions, 3549 flow. Second operand 7 states and 177 transitions. [2024-06-20 17:46:16,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 276 transitions, 4575 flow [2024-06-20 17:46:16,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 276 transitions, 4423 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:16,847 INFO L231 Difference]: Finished difference. Result has 194 places, 255 transitions, 3779 flow [2024-06-20 17:46:16,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3397, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3779, PETRI_PLACES=194, PETRI_TRANSITIONS=255} [2024-06-20 17:46:16,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-20 17:46:16,848 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 255 transitions, 3779 flow [2024-06-20 17:46:16,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:16,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:16,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:46:16,848 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)] === [2024-06-20 17:46:16,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash -877693156, now seen corresponding path program 2 times [2024-06-20 17:46:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:16,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623388227] [2024-06-20 17:46:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:16,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:17,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:17,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623388227] [2024-06-20 17:46:17,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623388227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:17,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:17,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:17,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997609782] [2024-06-20 17:46:17,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:17,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:17,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:17,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:17,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:17,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 255 transitions, 3779 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:17,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:17,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:17,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:17,565 INFO L124 PetriNetUnfolderBase]: 1670/2857 cut-off events. [2024-06-20 17:46:17,565 INFO L125 PetriNetUnfolderBase]: For 104043/104046 co-relation queries the response was YES. [2024-06-20 17:46:17,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18356 conditions, 2857 events. 1670/2857 cut-off events. For 104043/104046 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17226 event pairs, 367 based on Foata normal form. 1/2852 useless extension candidates. Maximal degree in co-relation 18266. Up to 2436 conditions per place. [2024-06-20 17:46:17,592 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 200 selfloop transitions, 70 changer transitions 0/278 dead transitions. [2024-06-20 17:46:17,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 278 transitions, 4582 flow [2024-06-20 17:46:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 17:46:17,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-20 17:46:17,594 INFO L175 Difference]: Start difference. First operand has 194 places, 255 transitions, 3779 flow. Second operand 8 states and 190 transitions. [2024-06-20 17:46:17,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 278 transitions, 4582 flow [2024-06-20 17:46:17,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 278 transitions, 4306 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:17,918 INFO L231 Difference]: Finished difference. Result has 199 places, 258 transitions, 3696 flow [2024-06-20 17:46:17,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3696, PETRI_PLACES=199, PETRI_TRANSITIONS=258} [2024-06-20 17:46:17,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-20 17:46:17,919 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 258 transitions, 3696 flow [2024-06-20 17:46:17,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:17,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:17,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:17,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:46:17,920 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)] === [2024-06-20 17:46:17,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:17,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1571205566, now seen corresponding path program 3 times [2024-06-20 17:46:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:17,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806583225] [2024-06-20 17:46:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:17,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:18,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806583225] [2024-06-20 17:46:18,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806583225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:18,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:18,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:18,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226954665] [2024-06-20 17:46:18,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:18,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:18,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:18,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:18,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:18,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:18,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 258 transitions, 3696 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:18,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:18,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:18,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:18,662 INFO L124 PetriNetUnfolderBase]: 1667/2847 cut-off events. [2024-06-20 17:46:18,662 INFO L125 PetriNetUnfolderBase]: For 106571/106574 co-relation queries the response was YES. [2024-06-20 17:46:18,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18097 conditions, 2847 events. 1667/2847 cut-off events. For 106571/106574 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17105 event pairs, 384 based on Foata normal form. 1/2838 useless extension candidates. Maximal degree in co-relation 18007. Up to 2284 conditions per place. [2024-06-20 17:46:18,688 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 136 changer transitions 0/278 dead transitions. [2024-06-20 17:46:18,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 278 transitions, 4542 flow [2024-06-20 17:46:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 17:46:18,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 17:46:18,690 INFO L175 Difference]: Start difference. First operand has 199 places, 258 transitions, 3696 flow. Second operand 7 states and 176 transitions. [2024-06-20 17:46:18,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 278 transitions, 4542 flow [2024-06-20 17:46:18,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 278 transitions, 4398 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:18,926 INFO L231 Difference]: Finished difference. Result has 202 places, 258 transitions, 3830 flow [2024-06-20 17:46:18,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3830, PETRI_PLACES=202, PETRI_TRANSITIONS=258} [2024-06-20 17:46:18,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-20 17:46:18,927 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 258 transitions, 3830 flow [2024-06-20 17:46:18,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:18,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:18,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:18,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:46:18,927 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)] === [2024-06-20 17:46:18,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:18,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1571196638, now seen corresponding path program 1 times [2024-06-20 17:46:18,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:18,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903438163] [2024-06-20 17:46:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:18,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:19,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:19,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903438163] [2024-06-20 17:46:19,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903438163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:19,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:19,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:19,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005246248] [2024-06-20 17:46:19,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:19,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:19,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:19,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:19,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:19,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 17:46:19,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 258 transitions, 3830 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:19,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:19,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 17:46:19,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:19,699 INFO L124 PetriNetUnfolderBase]: 1626/2808 cut-off events. [2024-06-20 17:46:19,699 INFO L125 PetriNetUnfolderBase]: For 119665/119665 co-relation queries the response was YES. [2024-06-20 17:46:19,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18166 conditions, 2808 events. 1626/2808 cut-off events. For 119665/119665 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16997 event pairs, 338 based on Foata normal form. 10/2795 useless extension candidates. Maximal degree in co-relation 18074. Up to 2284 conditions per place. [2024-06-20 17:46:19,726 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 190 selfloop transitions, 37 changer transitions 0/280 dead transitions. [2024-06-20 17:46:19,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 280 transitions, 4368 flow [2024-06-20 17:46:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 17:46:19,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 17:46:19,727 INFO L175 Difference]: Start difference. First operand has 202 places, 258 transitions, 3830 flow. Second operand 7 states and 172 transitions. [2024-06-20 17:46:19,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 280 transitions, 4368 flow [2024-06-20 17:46:19,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 280 transitions, 4097 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:19,900 INFO L231 Difference]: Finished difference. Result has 204 places, 259 transitions, 3655 flow [2024-06-20 17:46:19,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3559, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3655, PETRI_PLACES=204, PETRI_TRANSITIONS=259} [2024-06-20 17:46:19,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-20 17:46:19,900 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 259 transitions, 3655 flow [2024-06-20 17:46:19,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:19,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:19,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:19,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:46:19,901 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)] === [2024-06-20 17:46:19,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash -383159282, now seen corresponding path program 3 times [2024-06-20 17:46:19,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:19,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113614687] [2024-06-20 17:46:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:19,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:20,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:20,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113614687] [2024-06-20 17:46:20,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113614687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:20,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:20,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:20,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337307149] [2024-06-20 17:46:20,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:20,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:20,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:20,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:20,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:20,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:20,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 259 transitions, 3655 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:20,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:20,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:20,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:20,752 INFO L124 PetriNetUnfolderBase]: 1700/2903 cut-off events. [2024-06-20 17:46:20,752 INFO L125 PetriNetUnfolderBase]: For 114397/114397 co-relation queries the response was YES. [2024-06-20 17:46:20,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18444 conditions, 2903 events. 1700/2903 cut-off events. For 114397/114397 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17530 event pairs, 360 based on Foata normal form. 1/2899 useless extension candidates. Maximal degree in co-relation 18351. Up to 2485 conditions per place. [2024-06-20 17:46:20,780 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 203 selfloop transitions, 66 changer transitions 0/277 dead transitions. [2024-06-20 17:46:20,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 277 transitions, 4327 flow [2024-06-20 17:46:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 17:46:20,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-20 17:46:20,782 INFO L175 Difference]: Start difference. First operand has 204 places, 259 transitions, 3655 flow. Second operand 7 states and 169 transitions. [2024-06-20 17:46:20,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 277 transitions, 4327 flow [2024-06-20 17:46:21,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 277 transitions, 4241 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:21,010 INFO L231 Difference]: Finished difference. Result has 206 places, 259 transitions, 3707 flow [2024-06-20 17:46:21,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3569, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3707, PETRI_PLACES=206, PETRI_TRANSITIONS=259} [2024-06-20 17:46:21,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-20 17:46:21,011 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 259 transitions, 3707 flow [2024-06-20 17:46:21,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:21,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:21,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:21,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:46:21,012 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)] === [2024-06-20 17:46:21,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:21,013 INFO L85 PathProgramCache]: Analyzing trace with hash -383159096, now seen corresponding path program 4 times [2024-06-20 17:46:21,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:21,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512244133] [2024-06-20 17:46:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:21,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:21,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:21,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512244133] [2024-06-20 17:46:21,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512244133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:21,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:21,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:21,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850094525] [2024-06-20 17:46:21,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:21,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:21,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:21,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:21,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:21,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:21,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 259 transitions, 3707 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:21,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:21,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:21,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:21,697 INFO L124 PetriNetUnfolderBase]: 1694/2897 cut-off events. [2024-06-20 17:46:21,697 INFO L125 PetriNetUnfolderBase]: For 118043/118043 co-relation queries the response was YES. [2024-06-20 17:46:21,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18463 conditions, 2897 events. 1694/2897 cut-off events. For 118043/118043 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17547 event pairs, 362 based on Foata normal form. 2/2894 useless extension candidates. Maximal degree in co-relation 18369. Up to 2333 conditions per place. [2024-06-20 17:46:21,725 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 143 selfloop transitions, 127 changer transitions 0/278 dead transitions. [2024-06-20 17:46:21,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 278 transitions, 4477 flow [2024-06-20 17:46:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 17:46:21,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 17:46:21,726 INFO L175 Difference]: Start difference. First operand has 206 places, 259 transitions, 3707 flow. Second operand 7 states and 174 transitions. [2024-06-20 17:46:21,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 278 transitions, 4477 flow [2024-06-20 17:46:22,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 278 transitions, 4281 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:22,025 INFO L231 Difference]: Finished difference. Result has 206 places, 259 transitions, 3772 flow [2024-06-20 17:46:22,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3772, PETRI_PLACES=206, PETRI_TRANSITIONS=259} [2024-06-20 17:46:22,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-20 17:46:22,026 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 259 transitions, 3772 flow [2024-06-20 17:46:22,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:22,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:22,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:22,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:46:22,026 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)] === [2024-06-20 17:46:22,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:22,027 INFO L85 PathProgramCache]: Analyzing trace with hash -114398582, now seen corresponding path program 4 times [2024-06-20 17:46:22,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:22,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546101915] [2024-06-20 17:46:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:22,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:22,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:22,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546101915] [2024-06-20 17:46:22,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546101915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:22,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:22,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:22,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909612418] [2024-06-20 17:46:22,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:22,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:22,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:22,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:22,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:22,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:22,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 259 transitions, 3772 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:22,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:22,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:22,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:22,754 INFO L124 PetriNetUnfolderBase]: 1691/2891 cut-off events. [2024-06-20 17:46:22,754 INFO L125 PetriNetUnfolderBase]: For 120369/120369 co-relation queries the response was YES. [2024-06-20 17:46:22,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18610 conditions, 2891 events. 1691/2891 cut-off events. For 120369/120369 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17471 event pairs, 360 based on Foata normal form. 1/2887 useless extension candidates. Maximal degree in co-relation 18516. Up to 2474 conditions per place. [2024-06-20 17:46:22,782 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 70 changer transitions 0/276 dead transitions. [2024-06-20 17:46:22,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 276 transitions, 4350 flow [2024-06-20 17:46:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 17:46:22,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:46:22,783 INFO L175 Difference]: Start difference. First operand has 206 places, 259 transitions, 3772 flow. Second operand 7 states and 168 transitions. [2024-06-20 17:46:22,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 276 transitions, 4350 flow [2024-06-20 17:46:23,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 276 transitions, 3987 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:23,027 INFO L231 Difference]: Finished difference. Result has 207 places, 259 transitions, 3555 flow [2024-06-20 17:46:23,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3555, PETRI_PLACES=207, PETRI_TRANSITIONS=259} [2024-06-20 17:46:23,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-20 17:46:23,028 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 259 transitions, 3555 flow [2024-06-20 17:46:23,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:23,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:23,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:23,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:46:23,028 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)] === [2024-06-20 17:46:23,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash -339329052, now seen corresponding path program 5 times [2024-06-20 17:46:23,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:23,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88268323] [2024-06-20 17:46:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:23,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:23,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:23,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88268323] [2024-06-20 17:46:23,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88268323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:23,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:23,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:23,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970558466] [2024-06-20 17:46:23,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:23,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:23,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:23,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:23,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 259 transitions, 3555 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:23,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:23,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:23,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:23,752 INFO L124 PetriNetUnfolderBase]: 1693/2901 cut-off events. [2024-06-20 17:46:23,752 INFO L125 PetriNetUnfolderBase]: For 121626/121626 co-relation queries the response was YES. [2024-06-20 17:46:23,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18473 conditions, 2901 events. 1693/2901 cut-off events. For 121626/121626 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17549 event pairs, 355 based on Foata normal form. 2/2901 useless extension candidates. Maximal degree in co-relation 18378. Up to 2552 conditions per place. [2024-06-20 17:46:23,781 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 222 selfloop transitions, 50 changer transitions 0/280 dead transitions. [2024-06-20 17:46:23,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 280 transitions, 4399 flow [2024-06-20 17:46:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 17:46:23,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 17:46:23,782 INFO L175 Difference]: Start difference. First operand has 207 places, 259 transitions, 3555 flow. Second operand 8 states and 188 transitions. [2024-06-20 17:46:23,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 280 transitions, 4399 flow [2024-06-20 17:46:24,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 280 transitions, 4245 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:24,107 INFO L231 Difference]: Finished difference. Result has 210 places, 262 transitions, 3568 flow [2024-06-20 17:46:24,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3403, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3568, PETRI_PLACES=210, PETRI_TRANSITIONS=262} [2024-06-20 17:46:24,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-20 17:46:24,108 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 262 transitions, 3568 flow [2024-06-20 17:46:24,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:24,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:24,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:24,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:46:24,109 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)] === [2024-06-20 17:46:24,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:24,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1774711840, now seen corresponding path program 6 times [2024-06-20 17:46:24,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:24,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085980128] [2024-06-20 17:46:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:24,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:24,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:24,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085980128] [2024-06-20 17:46:24,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085980128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:24,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:24,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:24,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299875421] [2024-06-20 17:46:24,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:24,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:24,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:24,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:24,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 262 transitions, 3568 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:24,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:24,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:24,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:24,873 INFO L124 PetriNetUnfolderBase]: 1706/2927 cut-off events. [2024-06-20 17:46:24,874 INFO L125 PetriNetUnfolderBase]: For 126398/126401 co-relation queries the response was YES. [2024-06-20 17:46:24,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18732 conditions, 2927 events. 1706/2927 cut-off events. For 126398/126401 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17769 event pairs, 362 based on Foata normal form. 3/2927 useless extension candidates. Maximal degree in co-relation 18636. Up to 2427 conditions per place. [2024-06-20 17:46:24,901 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 107 changer transitions 0/291 dead transitions. [2024-06-20 17:46:24,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 291 transitions, 4605 flow [2024-06-20 17:46:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 17:46:24,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 17:46:24,902 INFO L175 Difference]: Start difference. First operand has 210 places, 262 transitions, 3568 flow. Second operand 7 states and 178 transitions. [2024-06-20 17:46:24,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 291 transitions, 4605 flow [2024-06-20 17:46:25,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 291 transitions, 4473 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:25,266 INFO L231 Difference]: Finished difference. Result has 211 places, 268 transitions, 3777 flow [2024-06-20 17:46:25,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3777, PETRI_PLACES=211, PETRI_TRANSITIONS=268} [2024-06-20 17:46:25,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-20 17:46:25,267 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 268 transitions, 3777 flow [2024-06-20 17:46:25,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:25,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:25,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:25,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:46:25,268 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)] === [2024-06-20 17:46:25,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:25,268 INFO L85 PathProgramCache]: Analyzing trace with hash -767880384, now seen corresponding path program 7 times [2024-06-20 17:46:25,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:25,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275610293] [2024-06-20 17:46:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:25,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:25,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:25,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275610293] [2024-06-20 17:46:25,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275610293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:25,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:25,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:25,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739558990] [2024-06-20 17:46:25,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:25,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:25,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:25,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:25,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:25,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:25,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 268 transitions, 3777 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:25,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:25,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:25,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:26,086 INFO L124 PetriNetUnfolderBase]: 1700/2913 cut-off events. [2024-06-20 17:46:26,086 INFO L125 PetriNetUnfolderBase]: For 130226/130226 co-relation queries the response was YES. [2024-06-20 17:46:26,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18787 conditions, 2913 events. 1700/2913 cut-off events. For 130226/130226 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17671 event pairs, 350 based on Foata normal form. 2/2913 useless extension candidates. Maximal degree in co-relation 18690. Up to 2422 conditions per place. [2024-06-20 17:46:26,115 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 183 selfloop transitions, 106 changer transitions 0/297 dead transitions. [2024-06-20 17:46:26,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 297 transitions, 4627 flow [2024-06-20 17:46:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 17:46:26,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 17:46:26,116 INFO L175 Difference]: Start difference. First operand has 211 places, 268 transitions, 3777 flow. Second operand 8 states and 204 transitions. [2024-06-20 17:46:26,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 297 transitions, 4627 flow [2024-06-20 17:46:26,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 297 transitions, 4369 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:26,460 INFO L231 Difference]: Finished difference. Result has 215 places, 268 transitions, 3743 flow [2024-06-20 17:46:26,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3519, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3743, PETRI_PLACES=215, PETRI_TRANSITIONS=268} [2024-06-20 17:46:26,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-20 17:46:26,461 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 268 transitions, 3743 flow [2024-06-20 17:46:26,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:26,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:26,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:26,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:46:26,462 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)] === [2024-06-20 17:46:26,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:26,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1774948990, now seen corresponding path program 8 times [2024-06-20 17:46:26,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:26,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210607913] [2024-06-20 17:46:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:26,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:26,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:26,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210607913] [2024-06-20 17:46:26,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210607913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:26,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:26,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:26,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829175259] [2024-06-20 17:46:26,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:26,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:26,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:26,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:26,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 268 transitions, 3743 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:26,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:26,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:26,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:27,292 INFO L124 PetriNetUnfolderBase]: 1697/2914 cut-off events. [2024-06-20 17:46:27,293 INFO L125 PetriNetUnfolderBase]: For 132420/132423 co-relation queries the response was YES. [2024-06-20 17:46:27,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18688 conditions, 2914 events. 1697/2914 cut-off events. For 132420/132423 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17643 event pairs, 362 based on Foata normal form. 3/2914 useless extension candidates. Maximal degree in co-relation 18591. Up to 2420 conditions per place. [2024-06-20 17:46:27,321 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 107 changer transitions 0/293 dead transitions. [2024-06-20 17:46:27,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 293 transitions, 4579 flow [2024-06-20 17:46:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 17:46:27,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-20 17:46:27,322 INFO L175 Difference]: Start difference. First operand has 215 places, 268 transitions, 3743 flow. Second operand 7 states and 180 transitions. [2024-06-20 17:46:27,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 293 transitions, 4579 flow [2024-06-20 17:46:27,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 293 transitions, 4365 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:27,705 INFO L231 Difference]: Finished difference. Result has 216 places, 268 transitions, 3753 flow [2024-06-20 17:46:27,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3753, PETRI_PLACES=216, PETRI_TRANSITIONS=268} [2024-06-20 17:46:27,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-20 17:46:27,705 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 268 transitions, 3753 flow [2024-06-20 17:46:27,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:27,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:27,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:27,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:46:27,706 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)] === [2024-06-20 17:46:27,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:27,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1762190692, now seen corresponding path program 2 times [2024-06-20 17:46:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:27,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950572395] [2024-06-20 17:46:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:27,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:27,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:27,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950572395] [2024-06-20 17:46:27,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950572395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:27,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:27,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:27,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309132184] [2024-06-20 17:46:27,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:27,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:27,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:27,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:27,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:28,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 17:46:28,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 268 transitions, 3753 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:28,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:28,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 17:46:28,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:28,446 INFO L124 PetriNetUnfolderBase]: 1650/2869 cut-off events. [2024-06-20 17:46:28,446 INFO L125 PetriNetUnfolderBase]: For 146505/146505 co-relation queries the response was YES. [2024-06-20 17:46:28,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18450 conditions, 2869 events. 1650/2869 cut-off events. For 146505/146505 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17664 event pairs, 263 based on Foata normal form. 11/2855 useless extension candidates. Maximal degree in co-relation 18353. Up to 2311 conditions per place. [2024-06-20 17:46:28,475 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 209 selfloop transitions, 27 changer transitions 0/292 dead transitions. [2024-06-20 17:46:28,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 292 transitions, 4321 flow [2024-06-20 17:46:28,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-20 17:46:28,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682926829268293 [2024-06-20 17:46:28,476 INFO L175 Difference]: Start difference. First operand has 216 places, 268 transitions, 3753 flow. Second operand 5 states and 137 transitions. [2024-06-20 17:46:28,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 292 transitions, 4321 flow [2024-06-20 17:46:28,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 292 transitions, 3964 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:46:28,881 INFO L231 Difference]: Finished difference. Result has 213 places, 270 transitions, 3487 flow [2024-06-20 17:46:28,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3396, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3487, PETRI_PLACES=213, PETRI_TRANSITIONS=270} [2024-06-20 17:46:28,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-20 17:46:28,882 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 270 transitions, 3487 flow [2024-06-20 17:46:28,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:28,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:28,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:28,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:46:28,883 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)] === [2024-06-20 17:46:28,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:28,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1923875406, now seen corresponding path program 3 times [2024-06-20 17:46:28,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:28,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305535932] [2024-06-20 17:46:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:28,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:29,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:29,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305535932] [2024-06-20 17:46:29,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305535932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:29,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:29,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:29,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416845289] [2024-06-20 17:46:29,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:29,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:29,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:29,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:29,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:29,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 17:46:29,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 270 transitions, 3487 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:29,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:29,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 17:46:29,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:29,639 INFO L124 PetriNetUnfolderBase]: 1676/2909 cut-off events. [2024-06-20 17:46:29,639 INFO L125 PetriNetUnfolderBase]: For 144310/144310 co-relation queries the response was YES. [2024-06-20 17:46:29,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18590 conditions, 2909 events. 1676/2909 cut-off events. For 144310/144310 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 17896 event pairs, 259 based on Foata normal form. 8/2892 useless extension candidates. Maximal degree in co-relation 18492. Up to 2321 conditions per place. [2024-06-20 17:46:29,669 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 211 selfloop transitions, 30 changer transitions 0/297 dead transitions. [2024-06-20 17:46:29,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 297 transitions, 4079 flow [2024-06-20 17:46:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 17:46:29,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 17:46:29,670 INFO L175 Difference]: Start difference. First operand has 213 places, 270 transitions, 3487 flow. Second operand 6 states and 159 transitions. [2024-06-20 17:46:29,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 297 transitions, 4079 flow [2024-06-20 17:46:29,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 297 transitions, 4024 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:29,991 INFO L231 Difference]: Finished difference. Result has 216 places, 271 transitions, 3516 flow [2024-06-20 17:46:29,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3434, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3516, PETRI_PLACES=216, PETRI_TRANSITIONS=271} [2024-06-20 17:46:29,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-20 17:46:29,992 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 271 transitions, 3516 flow [2024-06-20 17:46:29,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:29,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:29,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:29,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:46:29,993 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)] === [2024-06-20 17:46:29,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:29,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1774702912, now seen corresponding path program 4 times [2024-06-20 17:46:29,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:29,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077816325] [2024-06-20 17:46:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:29,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:30,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:30,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077816325] [2024-06-20 17:46:30,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077816325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:30,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:30,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:30,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293997709] [2024-06-20 17:46:30,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:30,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:30,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:30,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:30,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:30,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 17:46:30,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 271 transitions, 3516 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:30,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:30,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 17:46:30,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:30,811 INFO L124 PetriNetUnfolderBase]: 1686/2923 cut-off events. [2024-06-20 17:46:30,811 INFO L125 PetriNetUnfolderBase]: For 142170/142170 co-relation queries the response was YES. [2024-06-20 17:46:30,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18463 conditions, 2923 events. 1686/2923 cut-off events. For 142170/142170 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 17968 event pairs, 347 based on Foata normal form. 10/2906 useless extension candidates. Maximal degree in co-relation 18364. Up to 2398 conditions per place. [2024-06-20 17:46:30,838 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 207 selfloop transitions, 29 changer transitions 0/292 dead transitions. [2024-06-20 17:46:30,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 292 transitions, 4074 flow [2024-06-20 17:46:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 17:46:30,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 17:46:30,839 INFO L175 Difference]: Start difference. First operand has 216 places, 271 transitions, 3516 flow. Second operand 6 states and 152 transitions. [2024-06-20 17:46:30,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 292 transitions, 4074 flow [2024-06-20 17:46:31,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 292 transitions, 4008 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:31,186 INFO L231 Difference]: Finished difference. Result has 218 places, 272 transitions, 3534 flow [2024-06-20 17:46:31,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3534, PETRI_PLACES=218, PETRI_TRANSITIONS=272} [2024-06-20 17:46:31,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-20 17:46:31,187 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 272 transitions, 3534 flow [2024-06-20 17:46:31,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:31,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:31,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:31,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:46:31,187 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)] === [2024-06-20 17:46:31,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:31,187 INFO L85 PathProgramCache]: Analyzing trace with hash -117245622, now seen corresponding path program 1 times [2024-06-20 17:46:31,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:31,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414566474] [2024-06-20 17:46:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:31,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:31,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:31,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414566474] [2024-06-20 17:46:31,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414566474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:31,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:31,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:31,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211184302] [2024-06-20 17:46:31,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:31,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:31,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:31,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:31,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:31,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 272 transitions, 3534 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:31,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:31,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:31,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:31,924 INFO L124 PetriNetUnfolderBase]: 1808/3092 cut-off events. [2024-06-20 17:46:31,924 INFO L125 PetriNetUnfolderBase]: For 143071/143071 co-relation queries the response was YES. [2024-06-20 17:46:31,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19458 conditions, 3092 events. 1808/3092 cut-off events. For 143071/143071 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18932 event pairs, 316 based on Foata normal form. 4/3091 useless extension candidates. Maximal degree in co-relation 19358. Up to 2572 conditions per place. [2024-06-20 17:46:31,956 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 215 selfloop transitions, 78 changer transitions 0/301 dead transitions. [2024-06-20 17:46:31,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 301 transitions, 4358 flow [2024-06-20 17:46:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 17:46:31,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 17:46:31,957 INFO L175 Difference]: Start difference. First operand has 218 places, 272 transitions, 3534 flow. Second operand 7 states and 174 transitions. [2024-06-20 17:46:31,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 301 transitions, 4358 flow [2024-06-20 17:46:32,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 301 transitions, 4296 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:32,326 INFO L231 Difference]: Finished difference. Result has 221 places, 278 transitions, 3716 flow [2024-06-20 17:46:32,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3716, PETRI_PLACES=221, PETRI_TRANSITIONS=278} [2024-06-20 17:46:32,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-20 17:46:32,327 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 278 transitions, 3716 flow [2024-06-20 17:46:32,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:32,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:32,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:32,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:46:32,328 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)] === [2024-06-20 17:46:32,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash -114388662, now seen corresponding path program 2 times [2024-06-20 17:46:32,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:32,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31848486] [2024-06-20 17:46:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:32,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:32,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:32,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31848486] [2024-06-20 17:46:32,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31848486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:32,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:32,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:32,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966439609] [2024-06-20 17:46:32,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:32,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:32,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 278 transitions, 3716 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:32,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:32,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:32,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:33,211 INFO L124 PetriNetUnfolderBase]: 1824/3111 cut-off events. [2024-06-20 17:46:33,211 INFO L125 PetriNetUnfolderBase]: For 148987/148987 co-relation queries the response was YES. [2024-06-20 17:46:33,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19938 conditions, 3111 events. 1824/3111 cut-off events. For 148987/148987 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 19032 event pairs, 373 based on Foata normal form. 4/3110 useless extension candidates. Maximal degree in co-relation 19837. Up to 2668 conditions per place. [2024-06-20 17:46:33,244 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 218 selfloop transitions, 73 changer transitions 0/299 dead transitions. [2024-06-20 17:46:33,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 299 transitions, 4386 flow [2024-06-20 17:46:33,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 17:46:33,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-20 17:46:33,246 INFO L175 Difference]: Start difference. First operand has 221 places, 278 transitions, 3716 flow. Second operand 7 states and 169 transitions. [2024-06-20 17:46:33,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 299 transitions, 4386 flow [2024-06-20 17:46:33,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 299 transitions, 4237 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:33,606 INFO L231 Difference]: Finished difference. Result has 225 places, 281 transitions, 3769 flow [2024-06-20 17:46:33,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3769, PETRI_PLACES=225, PETRI_TRANSITIONS=281} [2024-06-20 17:46:33,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-20 17:46:33,607 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 281 transitions, 3769 flow [2024-06-20 17:46:33,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:33,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:33,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:33,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:46:33,607 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)] === [2024-06-20 17:46:33,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:33,608 INFO L85 PathProgramCache]: Analyzing trace with hash -339052408, now seen corresponding path program 3 times [2024-06-20 17:46:33,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:33,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812208453] [2024-06-20 17:46:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:33,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:33,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:33,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812208453] [2024-06-20 17:46:33,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812208453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:33,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:33,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:33,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736568799] [2024-06-20 17:46:33,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:33,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:33,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:33,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:33,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:33,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:33,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 281 transitions, 3769 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:33,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:33,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:33,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:34,489 INFO L124 PetriNetUnfolderBase]: 1896/3230 cut-off events. [2024-06-20 17:46:34,489 INFO L125 PetriNetUnfolderBase]: For 178812/178812 co-relation queries the response was YES. [2024-06-20 17:46:34,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20690 conditions, 3230 events. 1896/3230 cut-off events. For 178812/178812 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19844 event pairs, 373 based on Foata normal form. 20/3248 useless extension candidates. Maximal degree in co-relation 20587. Up to 2811 conditions per place. [2024-06-20 17:46:34,523 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 42 changer transitions 0/306 dead transitions. [2024-06-20 17:46:34,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 306 transitions, 4508 flow [2024-06-20 17:46:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 17:46:34,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-20 17:46:34,524 INFO L175 Difference]: Start difference. First operand has 225 places, 281 transitions, 3769 flow. Second operand 8 states and 189 transitions. [2024-06-20 17:46:34,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 306 transitions, 4508 flow [2024-06-20 17:46:34,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 306 transitions, 4346 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:34,987 INFO L231 Difference]: Finished difference. Result has 228 places, 286 transitions, 3783 flow [2024-06-20 17:46:34,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3609, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3783, PETRI_PLACES=228, PETRI_TRANSITIONS=286} [2024-06-20 17:46:34,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-20 17:46:34,988 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 286 transitions, 3783 flow [2024-06-20 17:46:34,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:34,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:34,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:34,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:46:34,988 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)] === [2024-06-20 17:46:34,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash -338867710, now seen corresponding path program 1 times [2024-06-20 17:46:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:34,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140365215] [2024-06-20 17:46:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:34,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:35,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:35,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140365215] [2024-06-20 17:46:35,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140365215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:35,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:35,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:35,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779151670] [2024-06-20 17:46:35,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:35,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:35,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:35,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:35,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 286 transitions, 3783 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:35,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:35,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:35,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:35,721 INFO L124 PetriNetUnfolderBase]: 1904/3242 cut-off events. [2024-06-20 17:46:35,721 INFO L125 PetriNetUnfolderBase]: For 156715/156715 co-relation queries the response was YES. [2024-06-20 17:46:35,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20905 conditions, 3242 events. 1904/3242 cut-off events. For 156715/156715 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19932 event pairs, 373 based on Foata normal form. 2/3242 useless extension candidates. Maximal degree in co-relation 20801. Up to 2917 conditions per place. [2024-06-20 17:46:35,754 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 272 selfloop transitions, 24 changer transitions 0/304 dead transitions. [2024-06-20 17:46:35,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 304 transitions, 4456 flow [2024-06-20 17:46:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 17:46:35,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 17:46:35,756 INFO L175 Difference]: Start difference. First operand has 228 places, 286 transitions, 3783 flow. Second operand 7 states and 161 transitions. [2024-06-20 17:46:35,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 304 transitions, 4456 flow [2024-06-20 17:46:36,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 304 transitions, 4348 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:36,199 INFO L231 Difference]: Finished difference. Result has 230 places, 289 transitions, 3783 flow [2024-06-20 17:46:36,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3675, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3783, PETRI_PLACES=230, PETRI_TRANSITIONS=289} [2024-06-20 17:46:36,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-20 17:46:36,200 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 289 transitions, 3783 flow [2024-06-20 17:46:36,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:36,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:36,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:36,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:46:36,200 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)] === [2024-06-20 17:46:36,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:36,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1568018906, now seen corresponding path program 4 times [2024-06-20 17:46:36,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:36,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275176952] [2024-06-20 17:46:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:36,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:36,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:36,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275176952] [2024-06-20 17:46:36,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275176952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:36,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:36,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:36,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304184889] [2024-06-20 17:46:36,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:36,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:36,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:36,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:36,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:36,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:36,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 289 transitions, 3783 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:36,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:36,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:36,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:37,066 INFO L124 PetriNetUnfolderBase]: 1963/3338 cut-off events. [2024-06-20 17:46:37,067 INFO L125 PetriNetUnfolderBase]: For 188892/188892 co-relation queries the response was YES. [2024-06-20 17:46:37,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21322 conditions, 3338 events. 1963/3338 cut-off events. For 188892/188892 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20558 event pairs, 323 based on Foata normal form. 20/3356 useless extension candidates. Maximal degree in co-relation 21216. Up to 2699 conditions per place. [2024-06-20 17:46:37,101 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 228 selfloop transitions, 91 changer transitions 0/327 dead transitions. [2024-06-20 17:46:37,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 327 transitions, 4587 flow [2024-06-20 17:46:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 17:46:37,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 17:46:37,103 INFO L175 Difference]: Start difference. First operand has 230 places, 289 transitions, 3783 flow. Second operand 8 states and 208 transitions. [2024-06-20 17:46:37,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 327 transitions, 4587 flow [2024-06-20 17:46:37,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 327 transitions, 4508 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:37,589 INFO L231 Difference]: Finished difference. Result has 234 places, 293 transitions, 3980 flow [2024-06-20 17:46:37,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3704, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3980, PETRI_PLACES=234, PETRI_TRANSITIONS=293} [2024-06-20 17:46:37,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-20 17:46:37,590 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 293 transitions, 3980 flow [2024-06-20 17:46:37,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:37,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:37,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:37,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:46:37,590 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)] === [2024-06-20 17:46:37,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:37,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1331658848, now seen corresponding path program 2 times [2024-06-20 17:46:37,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:37,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565656793] [2024-06-20 17:46:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:37,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:37,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565656793] [2024-06-20 17:46:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565656793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:37,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:37,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:37,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280921156] [2024-06-20 17:46:37,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:37,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:37,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:37,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:37,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:37,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:37,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 293 transitions, 3980 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:37,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:37,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:37,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:38,349 INFO L124 PetriNetUnfolderBase]: 1971/3347 cut-off events. [2024-06-20 17:46:38,350 INFO L125 PetriNetUnfolderBase]: For 166531/166531 co-relation queries the response was YES. [2024-06-20 17:46:38,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21967 conditions, 3347 events. 1971/3347 cut-off events. For 166531/166531 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20575 event pairs, 382 based on Foata normal form. 2/3347 useless extension candidates. Maximal degree in co-relation 21860. Up to 3016 conditions per place. [2024-06-20 17:46:38,384 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 276 selfloop transitions, 24 changer transitions 0/308 dead transitions. [2024-06-20 17:46:38,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 308 transitions, 4654 flow [2024-06-20 17:46:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-20 17:46:38,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 17:46:38,385 INFO L175 Difference]: Start difference. First operand has 234 places, 293 transitions, 3980 flow. Second operand 5 states and 123 transitions. [2024-06-20 17:46:38,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 308 transitions, 4654 flow [2024-06-20 17:46:38,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 308 transitions, 4487 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:38,790 INFO L231 Difference]: Finished difference. Result has 234 places, 295 transitions, 3915 flow [2024-06-20 17:46:38,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3915, PETRI_PLACES=234, PETRI_TRANSITIONS=295} [2024-06-20 17:46:38,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-20 17:46:38,791 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 295 transitions, 3915 flow [2024-06-20 17:46:38,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:38,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:38,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:38,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:46:38,791 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)] === [2024-06-20 17:46:38,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:38,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1331362178, now seen corresponding path program 3 times [2024-06-20 17:46:38,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:38,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492630972] [2024-06-20 17:46:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:38,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:39,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:39,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492630972] [2024-06-20 17:46:39,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492630972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:39,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:39,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:39,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326722734] [2024-06-20 17:46:39,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:39,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:39,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:39,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:39,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:39,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 295 transitions, 3915 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:39,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:39,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:39,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:39,557 INFO L124 PetriNetUnfolderBase]: 1966/3339 cut-off events. [2024-06-20 17:46:39,557 INFO L125 PetriNetUnfolderBase]: For 162325/162328 co-relation queries the response was YES. [2024-06-20 17:46:39,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21439 conditions, 3339 events. 1966/3339 cut-off events. For 162325/162328 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20537 event pairs, 379 based on Foata normal form. 4/3340 useless extension candidates. Maximal degree in co-relation 21331. Up to 2995 conditions per place. [2024-06-20 17:46:39,593 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 275 selfloop transitions, 25 changer transitions 0/308 dead transitions. [2024-06-20 17:46:39,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 308 transitions, 4585 flow [2024-06-20 17:46:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-20 17:46:39,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:46:39,594 INFO L175 Difference]: Start difference. First operand has 234 places, 295 transitions, 3915 flow. Second operand 5 states and 120 transitions. [2024-06-20 17:46:39,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 308 transitions, 4585 flow [2024-06-20 17:46:40,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 308 transitions, 4501 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:40,118 INFO L231 Difference]: Finished difference. Result has 236 places, 297 transitions, 3934 flow [2024-06-20 17:46:40,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3835, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3934, PETRI_PLACES=236, PETRI_TRANSITIONS=297} [2024-06-20 17:46:40,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-20 17:46:40,119 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 297 transitions, 3934 flow [2024-06-20 17:46:40,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-20 17:46:40,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:40,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:40,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:46:40,119 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)] === [2024-06-20 17:46:40,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:40,119 INFO L85 PathProgramCache]: Analyzing trace with hash 963334650, now seen corresponding path program 1 times [2024-06-20 17:46:40,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:40,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707664359] [2024-06-20 17:46:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:40,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:40,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:40,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707664359] [2024-06-20 17:46:40,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707664359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:40,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:40,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:40,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391322094] [2024-06-20 17:46:40,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:40,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:40,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:40,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:40,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:40,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:46:40,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 297 transitions, 3934 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:40,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:40,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:46:40,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:40,976 INFO L124 PetriNetUnfolderBase]: 1979/3354 cut-off events. [2024-06-20 17:46:40,976 INFO L125 PetriNetUnfolderBase]: For 161754/161754 co-relation queries the response was YES. [2024-06-20 17:46:41,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21569 conditions, 3354 events. 1979/3354 cut-off events. For 161754/161754 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20611 event pairs, 379 based on Foata normal form. 1/3353 useless extension candidates. Maximal degree in co-relation 21459. Up to 2985 conditions per place. [2024-06-20 17:46:41,014 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 276 selfloop transitions, 40 changer transitions 0/323 dead transitions. [2024-06-20 17:46:41,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 323 transitions, 4816 flow [2024-06-20 17:46:41,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 17:46:41,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-20 17:46:41,021 INFO L175 Difference]: Start difference. First operand has 236 places, 297 transitions, 3934 flow. Second operand 6 states and 146 transitions. [2024-06-20 17:46:41,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 323 transitions, 4816 flow [2024-06-20 17:46:41,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 323 transitions, 4733 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:41,523 INFO L231 Difference]: Finished difference. Result has 239 places, 303 transitions, 4031 flow [2024-06-20 17:46:41,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4031, PETRI_PLACES=239, PETRI_TRANSITIONS=303} [2024-06-20 17:46:41,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-20 17:46:41,524 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 303 transitions, 4031 flow [2024-06-20 17:46:41,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:41,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:41,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:41,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:46:41,524 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)] === [2024-06-20 17:46:41,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash 963542040, now seen corresponding path program 2 times [2024-06-20 17:46:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:41,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745734843] [2024-06-20 17:46:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:41,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:41,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:41,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745734843] [2024-06-20 17:46:41,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745734843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:41,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:41,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:41,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543479699] [2024-06-20 17:46:41,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:41,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:41,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:41,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:41,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:41,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:46:41,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 303 transitions, 4031 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:41,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:41,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:46:41,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:42,397 INFO L124 PetriNetUnfolderBase]: 1984/3363 cut-off events. [2024-06-20 17:46:42,397 INFO L125 PetriNetUnfolderBase]: For 167606/167606 co-relation queries the response was YES. [2024-06-20 17:46:42,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21919 conditions, 3363 events. 1984/3363 cut-off events. For 167606/167606 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20678 event pairs, 379 based on Foata normal form. 1/3362 useless extension candidates. Maximal degree in co-relation 21808. Up to 2991 conditions per place. [2024-06-20 17:46:42,429 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 276 selfloop transitions, 45 changer transitions 0/328 dead transitions. [2024-06-20 17:46:42,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 328 transitions, 4893 flow [2024-06-20 17:46:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 17:46:42,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 17:46:42,430 INFO L175 Difference]: Start difference. First operand has 239 places, 303 transitions, 4031 flow. Second operand 8 states and 184 transitions. [2024-06-20 17:46:42,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 328 transitions, 4893 flow [2024-06-20 17:46:43,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 328 transitions, 4822 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:43,045 INFO L231 Difference]: Finished difference. Result has 244 places, 306 transitions, 4110 flow [2024-06-20 17:46:43,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4110, PETRI_PLACES=244, PETRI_TRANSITIONS=306} [2024-06-20 17:46:43,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-20 17:46:43,046 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 306 transitions, 4110 flow [2024-06-20 17:46:43,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:43,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:43,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:43,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:46:43,046 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)] === [2024-06-20 17:46:43,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:43,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1334496148, now seen corresponding path program 1 times [2024-06-20 17:46:43,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:43,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407940279] [2024-06-20 17:46:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:43,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:43,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:43,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407940279] [2024-06-20 17:46:43,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407940279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:43,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:43,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:43,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218492912] [2024-06-20 17:46:43,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:43,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:43,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:43,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:46:43,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 306 transitions, 4110 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:43,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:43,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:46:43,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:43,923 INFO L124 PetriNetUnfolderBase]: 1992/3377 cut-off events. [2024-06-20 17:46:43,923 INFO L125 PetriNetUnfolderBase]: For 169557/169557 co-relation queries the response was YES. [2024-06-20 17:46:43,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22077 conditions, 3377 events. 1992/3377 cut-off events. For 169557/169557 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 20774 event pairs, 298 based on Foata normal form. 2/3377 useless extension candidates. Maximal degree in co-relation 21965. Up to 2987 conditions per place. [2024-06-20 17:46:43,960 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 299 selfloop transitions, 27 changer transitions 0/333 dead transitions. [2024-06-20 17:46:43,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 333 transitions, 5012 flow [2024-06-20 17:46:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 17:46:43,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:46:43,961 INFO L175 Difference]: Start difference. First operand has 244 places, 306 transitions, 4110 flow. Second operand 6 states and 144 transitions. [2024-06-20 17:46:43,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 333 transitions, 5012 flow [2024-06-20 17:46:44,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 333 transitions, 4890 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:44,436 INFO L231 Difference]: Finished difference. Result has 244 places, 311 transitions, 4142 flow [2024-06-20 17:46:44,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4142, PETRI_PLACES=244, PETRI_TRANSITIONS=311} [2024-06-20 17:46:44,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-20 17:46:44,437 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 311 transitions, 4142 flow [2024-06-20 17:46:44,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:44,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:44,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:44,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:46:44,438 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)] === [2024-06-20 17:46:44,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1702333118, now seen corresponding path program 2 times [2024-06-20 17:46:44,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:44,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896291533] [2024-06-20 17:46:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:44,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:44,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:44,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896291533] [2024-06-20 17:46:44,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896291533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:44,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:44,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:44,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433773725] [2024-06-20 17:46:44,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:44,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:44,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:44,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:44,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:44,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:46:44,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 311 transitions, 4142 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:44,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:44,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:46:44,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:45,487 INFO L124 PetriNetUnfolderBase]: 1987/3370 cut-off events. [2024-06-20 17:46:45,487 INFO L125 PetriNetUnfolderBase]: For 166475/166475 co-relation queries the response was YES. [2024-06-20 17:46:45,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21977 conditions, 3370 events. 1987/3370 cut-off events. For 166475/166475 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 20746 event pairs, 376 based on Foata normal form. 2/3370 useless extension candidates. Maximal degree in co-relation 21864. Up to 3027 conditions per place. [2024-06-20 17:46:45,523 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 298 selfloop transitions, 23 changer transitions 0/328 dead transitions. [2024-06-20 17:46:45,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 328 transitions, 4826 flow [2024-06-20 17:46:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 17:46:45,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-20 17:46:45,524 INFO L175 Difference]: Start difference. First operand has 244 places, 311 transitions, 4142 flow. Second operand 6 states and 140 transitions. [2024-06-20 17:46:45,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 328 transitions, 4826 flow [2024-06-20 17:46:46,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 328 transitions, 4739 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:46,048 INFO L231 Difference]: Finished difference. Result has 248 places, 311 transitions, 4106 flow [2024-06-20 17:46:46,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4106, PETRI_PLACES=248, PETRI_TRANSITIONS=311} [2024-06-20 17:46:46,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-20 17:46:46,049 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 311 transitions, 4106 flow [2024-06-20 17:46:46,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:46,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:46,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:46,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:46:46,049 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)] === [2024-06-20 17:46:46,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:46,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1261837374, now seen corresponding path program 3 times [2024-06-20 17:46:46,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:46,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944298158] [2024-06-20 17:46:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:46,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:46,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:46,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944298158] [2024-06-20 17:46:46,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944298158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:46,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:46,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:46,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808551091] [2024-06-20 17:46:46,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:46,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:46,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:46,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:46,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:46:46,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 311 transitions, 4106 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:46,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:46,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:46:46,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:46,971 INFO L124 PetriNetUnfolderBase]: 2008/3405 cut-off events. [2024-06-20 17:46:46,971 INFO L125 PetriNetUnfolderBase]: For 174424/174427 co-relation queries the response was YES. [2024-06-20 17:46:46,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22323 conditions, 3405 events. 2008/3405 cut-off events. For 174424/174427 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21035 event pairs, 398 based on Foata normal form. 1/3397 useless extension candidates. Maximal degree in co-relation 22208. Up to 2792 conditions per place. [2024-06-20 17:46:47,011 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 114 changer transitions 0/366 dead transitions. [2024-06-20 17:46:47,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 366 transitions, 5606 flow [2024-06-20 17:46:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:46:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:46:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-20 17:46:47,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-20 17:46:47,012 INFO L175 Difference]: Start difference. First operand has 248 places, 311 transitions, 4106 flow. Second operand 10 states and 244 transitions. [2024-06-20 17:46:47,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 366 transitions, 5606 flow [2024-06-20 17:46:47,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 366 transitions, 5559 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:47,557 INFO L231 Difference]: Finished difference. Result has 254 places, 324 transitions, 4499 flow [2024-06-20 17:46:47,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4059, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4499, PETRI_PLACES=254, PETRI_TRANSITIONS=324} [2024-06-20 17:46:47,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-20 17:46:47,558 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 324 transitions, 4499 flow [2024-06-20 17:46:47,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:47,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:47,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:47,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:46:47,559 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)] === [2024-06-20 17:46:47,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1416638238, now seen corresponding path program 4 times [2024-06-20 17:46:47,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:47,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387397778] [2024-06-20 17:46:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:47,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:47,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:47,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387397778] [2024-06-20 17:46:47,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387397778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:47,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:47,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:47,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463194859] [2024-06-20 17:46:47,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:47,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:47,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:47,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:47,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:47,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:46:47,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 324 transitions, 4499 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:47,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:47,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:46:47,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:48,440 INFO L124 PetriNetUnfolderBase]: 2013/3412 cut-off events. [2024-06-20 17:46:48,440 INFO L125 PetriNetUnfolderBase]: For 182530/182533 co-relation queries the response was YES. [2024-06-20 17:46:48,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23112 conditions, 3412 events. 2013/3412 cut-off events. For 182530/182533 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21078 event pairs, 398 based on Foata normal form. 1/3404 useless extension candidates. Maximal degree in co-relation 22996. Up to 2796 conditions per place. [2024-06-20 17:46:48,480 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 119 changer transitions 0/366 dead transitions. [2024-06-20 17:46:48,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 366 transitions, 5735 flow [2024-06-20 17:46:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:46:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:46:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-20 17:46:48,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698447893569845 [2024-06-20 17:46:48,481 INFO L175 Difference]: Start difference. First operand has 254 places, 324 transitions, 4499 flow. Second operand 11 states and 257 transitions. [2024-06-20 17:46:48,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 366 transitions, 5735 flow [2024-06-20 17:46:48,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 366 transitions, 5514 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:48,946 INFO L231 Difference]: Finished difference. Result has 262 places, 327 transitions, 4578 flow [2024-06-20 17:46:48,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4300, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4578, PETRI_PLACES=262, PETRI_TRANSITIONS=327} [2024-06-20 17:46:48,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-20 17:46:48,946 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 327 transitions, 4578 flow [2024-06-20 17:46:48,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:48,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:48,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:48,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:46:48,947 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)] === [2024-06-20 17:46:48,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:48,948 INFO L85 PathProgramCache]: Analyzing trace with hash -220528414, now seen corresponding path program 5 times [2024-06-20 17:46:48,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:48,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464790675] [2024-06-20 17:46:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:48,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:49,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:49,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464790675] [2024-06-20 17:46:49,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464790675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:49,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:49,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:49,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740888715] [2024-06-20 17:46:49,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:49,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:49,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:49,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:49,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:49,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:46:49,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 327 transitions, 4578 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:49,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:49,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:46:49,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:49,910 INFO L124 PetriNetUnfolderBase]: 2034/3447 cut-off events. [2024-06-20 17:46:49,910 INFO L125 PetriNetUnfolderBase]: For 190978/190981 co-relation queries the response was YES. [2024-06-20 17:46:49,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23483 conditions, 3447 events. 2034/3447 cut-off events. For 190978/190981 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 21308 event pairs, 398 based on Foata normal form. 1/3439 useless extension candidates. Maximal degree in co-relation 23366. Up to 2815 conditions per place. [2024-06-20 17:46:49,943 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 234 selfloop transitions, 126 changer transitions 0/367 dead transitions. [2024-06-20 17:46:49,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 367 transitions, 5854 flow [2024-06-20 17:46:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:46:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:46:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-20 17:46:49,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 17:46:49,944 INFO L175 Difference]: Start difference. First operand has 262 places, 327 transitions, 4578 flow. Second operand 11 states and 253 transitions. [2024-06-20 17:46:49,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 367 transitions, 5854 flow [2024-06-20 17:46:50,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 367 transitions, 5616 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:50,422 INFO L231 Difference]: Finished difference. Result has 266 places, 334 transitions, 4702 flow [2024-06-20 17:46:50,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4351, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4702, PETRI_PLACES=266, PETRI_TRANSITIONS=334} [2024-06-20 17:46:50,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-20 17:46:50,423 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 334 transitions, 4702 flow [2024-06-20 17:46:50,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:50,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:50,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:50,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:46:50,423 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)] === [2024-06-20 17:46:50,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash 136618301, now seen corresponding path program 1 times [2024-06-20 17:46:50,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:50,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153638364] [2024-06-20 17:46:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:50,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:50,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:50,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153638364] [2024-06-20 17:46:50,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153638364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:50,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:50,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:50,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234104513] [2024-06-20 17:46:50,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:50,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:50,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:50,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:50,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:50,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:50,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 334 transitions, 4702 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:50,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:50,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:50,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:51,415 INFO L124 PetriNetUnfolderBase]: 2047/3470 cut-off events. [2024-06-20 17:46:51,415 INFO L125 PetriNetUnfolderBase]: For 198579/198582 co-relation queries the response was YES. [2024-06-20 17:46:51,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23780 conditions, 3470 events. 2047/3470 cut-off events. For 198579/198582 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 21481 event pairs, 414 based on Foata normal form. 1/3463 useless extension candidates. Maximal degree in co-relation 23663. Up to 2870 conditions per place. [2024-06-20 17:46:51,453 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 205 selfloop transitions, 151 changer transitions 0/364 dead transitions. [2024-06-20 17:46:51,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 364 transitions, 5942 flow [2024-06-20 17:46:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 17:46:51,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 17:46:51,454 INFO L175 Difference]: Start difference. First operand has 266 places, 334 transitions, 4702 flow. Second operand 8 states and 198 transitions. [2024-06-20 17:46:51,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 364 transitions, 5942 flow [2024-06-20 17:46:51,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 364 transitions, 5715 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:51,907 INFO L231 Difference]: Finished difference. Result has 267 places, 340 transitions, 4875 flow [2024-06-20 17:46:51,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4875, PETRI_PLACES=267, PETRI_TRANSITIONS=340} [2024-06-20 17:46:51,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-20 17:46:51,907 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 340 transitions, 4875 flow [2024-06-20 17:46:51,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:51,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:51,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:51,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:46:51,908 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)] === [2024-06-20 17:46:51,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:51,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1628774587, now seen corresponding path program 2 times [2024-06-20 17:46:51,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:51,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21244298] [2024-06-20 17:46:51,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:51,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:52,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:52,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21244298] [2024-06-20 17:46:52,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21244298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:52,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:52,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:52,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850448126] [2024-06-20 17:46:52,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:52,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:52,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:52,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:52,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:52,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:52,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 340 transitions, 4875 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:52,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:52,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:52,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:52,777 INFO L124 PetriNetUnfolderBase]: 2044/3464 cut-off events. [2024-06-20 17:46:52,778 INFO L125 PetriNetUnfolderBase]: For 202743/202746 co-relation queries the response was YES. [2024-06-20 17:46:52,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23815 conditions, 3464 events. 2044/3464 cut-off events. For 202743/202746 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 21422 event pairs, 416 based on Foata normal form. 1/3455 useless extension candidates. Maximal degree in co-relation 23697. Up to 2867 conditions per place. [2024-06-20 17:46:52,816 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 204 selfloop transitions, 151 changer transitions 0/363 dead transitions. [2024-06-20 17:46:52,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 363 transitions, 5897 flow [2024-06-20 17:46:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 17:46:52,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-20 17:46:52,818 INFO L175 Difference]: Start difference. First operand has 267 places, 340 transitions, 4875 flow. Second operand 8 states and 195 transitions. [2024-06-20 17:46:52,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 363 transitions, 5897 flow [2024-06-20 17:46:53,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 363 transitions, 5617 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:53,263 INFO L231 Difference]: Finished difference. Result has 271 places, 340 transitions, 4903 flow [2024-06-20 17:46:53,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4903, PETRI_PLACES=271, PETRI_TRANSITIONS=340} [2024-06-20 17:46:53,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-20 17:46:53,264 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 340 transitions, 4903 flow [2024-06-20 17:46:53,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:53,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:53,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:53,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:46:53,264 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)] === [2024-06-20 17:46:53,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:53,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1210562189, now seen corresponding path program 3 times [2024-06-20 17:46:53,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:53,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273777941] [2024-06-20 17:46:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:53,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:53,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:53,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273777941] [2024-06-20 17:46:53,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273777941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:53,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:53,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:53,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084659193] [2024-06-20 17:46:53,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:53,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:53,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:53,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:53,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:53,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:53,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 340 transitions, 4903 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:53,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:53,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:53,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:54,138 INFO L124 PetriNetUnfolderBase]: 2057/3487 cut-off events. [2024-06-20 17:46:54,138 INFO L125 PetriNetUnfolderBase]: For 211668/211671 co-relation queries the response was YES. [2024-06-20 17:46:54,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24113 conditions, 3487 events. 2057/3487 cut-off events. For 211668/211671 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21613 event pairs, 416 based on Foata normal form. 1/3479 useless extension candidates. Maximal degree in co-relation 23993. Up to 2882 conditions per place. [2024-06-20 17:46:54,178 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 157 changer transitions 0/368 dead transitions. [2024-06-20 17:46:54,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 368 transitions, 6175 flow [2024-06-20 17:46:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-20 17:46:54,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-20 17:46:54,179 INFO L175 Difference]: Start difference. First operand has 271 places, 340 transitions, 4903 flow. Second operand 9 states and 214 transitions. [2024-06-20 17:46:54,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 368 transitions, 6175 flow [2024-06-20 17:46:54,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 368 transitions, 5853 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:54,749 INFO L231 Difference]: Finished difference. Result has 273 places, 346 transitions, 5011 flow [2024-06-20 17:46:54,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5011, PETRI_PLACES=273, PETRI_TRANSITIONS=346} [2024-06-20 17:46:54,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-20 17:46:54,749 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 346 transitions, 5011 flow [2024-06-20 17:46:54,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:54,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:54,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:54,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:46:54,750 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)] === [2024-06-20 17:46:54,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1132810055, now seen corresponding path program 4 times [2024-06-20 17:46:54,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:54,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929802623] [2024-06-20 17:46:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:54,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:54,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929802623] [2024-06-20 17:46:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929802623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:54,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:54,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:54,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318454418] [2024-06-20 17:46:54,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:54,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:54,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:54,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:54,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:55,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:55,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 346 transitions, 5011 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:55,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:55,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:55,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:55,604 INFO L124 PetriNetUnfolderBase]: 2070/3512 cut-off events. [2024-06-20 17:46:55,604 INFO L125 PetriNetUnfolderBase]: For 219955/219958 co-relation queries the response was YES. [2024-06-20 17:46:55,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24427 conditions, 3512 events. 2070/3512 cut-off events. For 219955/219958 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 21786 event pairs, 411 based on Foata normal form. 1/3507 useless extension candidates. Maximal degree in co-relation 24306. Up to 2897 conditions per place. [2024-06-20 17:46:55,646 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 206 selfloop transitions, 161 changer transitions 0/375 dead transitions. [2024-06-20 17:46:55,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 375 transitions, 6437 flow [2024-06-20 17:46:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-20 17:46:55,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-20 17:46:55,647 INFO L175 Difference]: Start difference. First operand has 273 places, 346 transitions, 5011 flow. Second operand 9 states and 217 transitions. [2024-06-20 17:46:55,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 375 transitions, 6437 flow [2024-06-20 17:46:56,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 375 transitions, 6129 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:56,185 INFO L231 Difference]: Finished difference. Result has 277 places, 352 transitions, 5141 flow [2024-06-20 17:46:56,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4731, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5141, PETRI_PLACES=277, PETRI_TRANSITIONS=352} [2024-06-20 17:46:56,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-20 17:46:56,186 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 352 transitions, 5141 flow [2024-06-20 17:46:56,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:56,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:56,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:56,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:46:56,186 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)] === [2024-06-20 17:46:56,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1470082885, now seen corresponding path program 5 times [2024-06-20 17:46:56,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:56,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757253359] [2024-06-20 17:46:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:56,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:56,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:56,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757253359] [2024-06-20 17:46:56,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757253359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:56,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:56,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:56,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656468398] [2024-06-20 17:46:56,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:56,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:56,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:56,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:56,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:56,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:46:56,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 352 transitions, 5141 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:56,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:56,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:46:56,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:57,154 INFO L124 PetriNetUnfolderBase]: 2067/3502 cut-off events. [2024-06-20 17:46:57,155 INFO L125 PetriNetUnfolderBase]: For 224698/224701 co-relation queries the response was YES. [2024-06-20 17:46:57,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24369 conditions, 3502 events. 2067/3502 cut-off events. For 224698/224701 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21726 event pairs, 420 based on Foata normal form. 1/3491 useless extension candidates. Maximal degree in co-relation 24246. Up to 2894 conditions per place. [2024-06-20 17:46:57,189 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 161 changer transitions 0/372 dead transitions. [2024-06-20 17:46:57,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 372 transitions, 6185 flow [2024-06-20 17:46:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 17:46:57,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 17:46:57,191 INFO L175 Difference]: Start difference. First operand has 277 places, 352 transitions, 5141 flow. Second operand 8 states and 194 transitions. [2024-06-20 17:46:57,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 372 transitions, 6185 flow [2024-06-20 17:46:57,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 372 transitions, 5682 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:57,789 INFO L231 Difference]: Finished difference. Result has 278 places, 352 transitions, 4966 flow [2024-06-20 17:46:57,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4638, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4966, PETRI_PLACES=278, PETRI_TRANSITIONS=352} [2024-06-20 17:46:57,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-20 17:46:57,790 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 352 transitions, 4966 flow [2024-06-20 17:46:57,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:57,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:57,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:57,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:46:57,791 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)] === [2024-06-20 17:46:57,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash -277289932, now seen corresponding path program 6 times [2024-06-20 17:46:57,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:57,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836881439] [2024-06-20 17:46:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:57,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:58,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:58,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836881439] [2024-06-20 17:46:58,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836881439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:58,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:58,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:58,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012225890] [2024-06-20 17:46:58,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:58,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:58,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:58,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:58,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:58,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:46:58,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 352 transitions, 4966 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:58,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:58,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:46:58,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:58,808 INFO L124 PetriNetUnfolderBase]: 2085/3535 cut-off events. [2024-06-20 17:46:58,808 INFO L125 PetriNetUnfolderBase]: For 233792/233792 co-relation queries the response was YES. [2024-06-20 17:46:58,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24337 conditions, 3535 events. 2085/3535 cut-off events. For 233792/233792 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 21996 event pairs, 385 based on Foata normal form. 2/3532 useless extension candidates. Maximal degree in co-relation 24213. Up to 2942 conditions per place. [2024-06-20 17:46:58,848 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 280 selfloop transitions, 98 changer transitions 0/385 dead transitions. [2024-06-20 17:46:58,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 385 transitions, 6132 flow [2024-06-20 17:46:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 17:46:58,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:46:58,849 INFO L175 Difference]: Start difference. First operand has 278 places, 352 transitions, 4966 flow. Second operand 8 states and 192 transitions. [2024-06-20 17:46:58,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 385 transitions, 6132 flow [2024-06-20 17:46:59,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 385 transitions, 5802 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:59,435 INFO L231 Difference]: Finished difference. Result has 280 places, 359 transitions, 4950 flow [2024-06-20 17:46:59,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4950, PETRI_PLACES=280, PETRI_TRANSITIONS=359} [2024-06-20 17:46:59,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-20 17:46:59,436 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 359 transitions, 4950 flow [2024-06-20 17:46:59,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:59,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:59,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:59,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:46:59,436 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)] === [2024-06-20 17:46:59,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:59,437 INFO L85 PathProgramCache]: Analyzing trace with hash -941709516, now seen corresponding path program 7 times [2024-06-20 17:46:59,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:59,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528175093] [2024-06-20 17:46:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:59,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:59,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:59,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528175093] [2024-06-20 17:46:59,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528175093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:59,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:59,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:59,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031052392] [2024-06-20 17:46:59,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:59,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:59,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:59,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:59,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:46:59,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 359 transitions, 4950 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:59,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:59,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:46:59,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:00,471 INFO L124 PetriNetUnfolderBase]: 2079/3528 cut-off events. [2024-06-20 17:47:00,471 INFO L125 PetriNetUnfolderBase]: For 234808/234808 co-relation queries the response was YES. [2024-06-20 17:47:00,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24187 conditions, 3528 events. 2079/3528 cut-off events. For 234808/234808 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 21959 event pairs, 382 based on Foata normal form. 2/3525 useless extension candidates. Maximal degree in co-relation 24061. Up to 2875 conditions per place. [2024-06-20 17:47:00,516 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 268 selfloop transitions, 119 changer transitions 0/394 dead transitions. [2024-06-20 17:47:00,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 394 transitions, 6086 flow [2024-06-20 17:47:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:47:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:47:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-20 17:47:00,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565410199556541 [2024-06-20 17:47:00,517 INFO L175 Difference]: Start difference. First operand has 280 places, 359 transitions, 4950 flow. Second operand 11 states and 255 transitions. [2024-06-20 17:47:00,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 394 transitions, 6086 flow [2024-06-20 17:47:01,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 394 transitions, 5830 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-20 17:47:01,124 INFO L231 Difference]: Finished difference. Result has 286 places, 359 transitions, 4939 flow [2024-06-20 17:47:01,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4694, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4939, PETRI_PLACES=286, PETRI_TRANSITIONS=359} [2024-06-20 17:47:01,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-20 17:47:01,125 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 359 transitions, 4939 flow [2024-06-20 17:47:01,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:01,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:01,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:01,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:47:01,125 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)] === [2024-06-20 17:47:01,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:01,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1929277644, now seen corresponding path program 8 times [2024-06-20 17:47:01,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:01,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046130726] [2024-06-20 17:47:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:01,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:01,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:01,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046130726] [2024-06-20 17:47:01,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046130726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:01,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:01,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:01,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500187666] [2024-06-20 17:47:01,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:01,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:01,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:01,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:01,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:47:01,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 359 transitions, 4939 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:01,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:01,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:47:01,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:02,071 INFO L124 PetriNetUnfolderBase]: 2115/3594 cut-off events. [2024-06-20 17:47:02,071 INFO L125 PetriNetUnfolderBase]: For 250327/250327 co-relation queries the response was YES. [2024-06-20 17:47:02,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24669 conditions, 3594 events. 2115/3594 cut-off events. For 250327/250327 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22460 event pairs, 377 based on Foata normal form. 4/3596 useless extension candidates. Maximal degree in co-relation 24543. Up to 3181 conditions per place. [2024-06-20 17:47:02,114 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 333 selfloop transitions, 49 changer transitions 0/389 dead transitions. [2024-06-20 17:47:02,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 389 transitions, 6071 flow [2024-06-20 17:47:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 17:47:02,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-20 17:47:02,115 INFO L175 Difference]: Start difference. First operand has 286 places, 359 transitions, 4939 flow. Second operand 8 states and 182 transitions. [2024-06-20 17:47:02,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 389 transitions, 6071 flow [2024-06-20 17:47:02,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 389 transitions, 5795 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 17:47:02,673 INFO L231 Difference]: Finished difference. Result has 286 places, 373 transitions, 5003 flow [2024-06-20 17:47:02,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4681, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5003, PETRI_PLACES=286, PETRI_TRANSITIONS=373} [2024-06-20 17:47:02,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-20 17:47:02,673 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 373 transitions, 5003 flow [2024-06-20 17:47:02,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:02,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:02,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:02,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:47:02,674 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)] === [2024-06-20 17:47:02,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:02,674 INFO L85 PathProgramCache]: Analyzing trace with hash 811144534, now seen corresponding path program 9 times [2024-06-20 17:47:02,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:02,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426115645] [2024-06-20 17:47:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:02,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:02,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:02,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426115645] [2024-06-20 17:47:02,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426115645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:02,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:02,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:02,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288267939] [2024-06-20 17:47:02,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:02,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:02,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:02,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:02,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:02,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:47:02,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 373 transitions, 5003 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:02,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:02,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:47:02,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:03,588 INFO L124 PetriNetUnfolderBase]: 2173/3692 cut-off events. [2024-06-20 17:47:03,588 INFO L125 PetriNetUnfolderBase]: For 268952/268955 co-relation queries the response was YES. [2024-06-20 17:47:03,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25942 conditions, 3692 events. 2173/3692 cut-off events. For 268952/268955 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23223 event pairs, 385 based on Foata normal form. 4/3693 useless extension candidates. Maximal degree in co-relation 25814. Up to 3011 conditions per place. [2024-06-20 17:47:03,637 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 284 selfloop transitions, 133 changer transitions 0/424 dead transitions. [2024-06-20 17:47:03,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 424 transitions, 6648 flow [2024-06-20 17:47:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:47:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:47:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 17:47:03,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-20 17:47:03,638 INFO L175 Difference]: Start difference. First operand has 286 places, 373 transitions, 5003 flow. Second operand 7 states and 183 transitions. [2024-06-20 17:47:03,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 424 transitions, 6648 flow [2024-06-20 17:47:04,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 424 transitions, 6507 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-20 17:47:04,406 INFO L231 Difference]: Finished difference. Result has 291 places, 395 transitions, 5607 flow [2024-06-20 17:47:04,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4862, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5607, PETRI_PLACES=291, PETRI_TRANSITIONS=395} [2024-06-20 17:47:04,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-20 17:47:04,407 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 395 transitions, 5607 flow [2024-06-20 17:47:04,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:04,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:04,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:04,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:47:04,407 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)] === [2024-06-20 17:47:04,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash 252508356, now seen corresponding path program 10 times [2024-06-20 17:47:04,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:04,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124326406] [2024-06-20 17:47:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:04,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:04,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:04,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124326406] [2024-06-20 17:47:04,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124326406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:04,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:04,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:04,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284579767] [2024-06-20 17:47:04,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:04,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:04,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:04,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:04,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:04,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:47:04,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 395 transitions, 5607 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:04,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:04,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:47:04,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:05,349 INFO L124 PetriNetUnfolderBase]: 2161/3672 cut-off events. [2024-06-20 17:47:05,349 INFO L125 PetriNetUnfolderBase]: For 273717/273717 co-relation queries the response was YES. [2024-06-20 17:47:05,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26639 conditions, 3672 events. 2161/3672 cut-off events. For 273717/273717 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 23059 event pairs, 378 based on Foata normal form. 4/3674 useless extension candidates. Maximal degree in co-relation 26507. Up to 3001 conditions per place. [2024-06-20 17:47:05,391 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 129 changer transitions 0/426 dead transitions. [2024-06-20 17:47:05,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 426 transitions, 6667 flow [2024-06-20 17:47:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 17:47:05,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 17:47:05,393 INFO L175 Difference]: Start difference. First operand has 291 places, 395 transitions, 5607 flow. Second operand 8 states and 203 transitions. [2024-06-20 17:47:05,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 426 transitions, 6667 flow [2024-06-20 17:47:06,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 426 transitions, 6540 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-20 17:47:06,165 INFO L231 Difference]: Finished difference. Result has 297 places, 395 transitions, 5767 flow [2024-06-20 17:47:06,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5482, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5767, PETRI_PLACES=297, PETRI_TRANSITIONS=395} [2024-06-20 17:47:06,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-20 17:47:06,166 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 395 transitions, 5767 flow [2024-06-20 17:47:06,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:06,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:06,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:06,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:47:06,166 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)] === [2024-06-20 17:47:06,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 977491860, now seen corresponding path program 11 times [2024-06-20 17:47:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:06,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384496888] [2024-06-20 17:47:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:06,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:06,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:06,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384496888] [2024-06-20 17:47:06,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384496888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:06,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:06,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:06,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887416497] [2024-06-20 17:47:06,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:06,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:06,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:06,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:06,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:47:06,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 395 transitions, 5767 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:06,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:06,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:47:06,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:07,190 INFO L124 PetriNetUnfolderBase]: 2155/3664 cut-off events. [2024-06-20 17:47:07,191 INFO L125 PetriNetUnfolderBase]: For 262395/262395 co-relation queries the response was YES. [2024-06-20 17:47:07,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26457 conditions, 3664 events. 2155/3664 cut-off events. For 262395/262395 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 23036 event pairs, 377 based on Foata normal form. 2/3664 useless extension candidates. Maximal degree in co-relation 26324. Up to 3236 conditions per place. [2024-06-20 17:47:07,237 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 41 changer transitions 0/413 dead transitions. [2024-06-20 17:47:07,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 413 transitions, 6625 flow [2024-06-20 17:47:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:47:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:47:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 17:47:07,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-20 17:47:07,238 INFO L175 Difference]: Start difference. First operand has 297 places, 395 transitions, 5767 flow. Second operand 5 states and 129 transitions. [2024-06-20 17:47:07,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 413 transitions, 6625 flow [2024-06-20 17:47:07,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 413 transitions, 6294 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:07,974 INFO L231 Difference]: Finished difference. Result has 295 places, 395 transitions, 5544 flow [2024-06-20 17:47:07,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5436, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5544, PETRI_PLACES=295, PETRI_TRANSITIONS=395} [2024-06-20 17:47:07,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-20 17:47:07,975 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 395 transitions, 5544 flow [2024-06-20 17:47:07,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:07,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:07,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:07,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:47:07,975 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)] === [2024-06-20 17:47:07,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:07,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1006965387, now seen corresponding path program 6 times [2024-06-20 17:47:07,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:07,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641806539] [2024-06-20 17:47:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:07,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:08,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:08,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641806539] [2024-06-20 17:47:08,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641806539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:08,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:08,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:08,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000581036] [2024-06-20 17:47:08,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:08,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:08,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:08,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:08,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:08,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 395 transitions, 5544 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:08,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:08,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:08,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:08,867 INFO L124 PetriNetUnfolderBase]: 2152/3647 cut-off events. [2024-06-20 17:47:08,867 INFO L125 PetriNetUnfolderBase]: For 256148/256148 co-relation queries the response was YES. [2024-06-20 17:47:08,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26016 conditions, 3647 events. 2152/3647 cut-off events. For 256148/256148 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 22862 event pairs, 389 based on Foata normal form. 1/3643 useless extension candidates. Maximal degree in co-relation 25884. Up to 3014 conditions per place. [2024-06-20 17:47:08,909 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 153 changer transitions 0/416 dead transitions. [2024-06-20 17:47:08,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 416 transitions, 6842 flow [2024-06-20 17:47:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 17:47:08,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-20 17:47:08,910 INFO L175 Difference]: Start difference. First operand has 295 places, 395 transitions, 5544 flow. Second operand 8 states and 195 transitions. [2024-06-20 17:47:08,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 416 transitions, 6842 flow [2024-06-20 17:47:09,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 416 transitions, 6740 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:47:09,897 INFO L231 Difference]: Finished difference. Result has 298 places, 395 transitions, 5760 flow [2024-06-20 17:47:09,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5760, PETRI_PLACES=298, PETRI_TRANSITIONS=395} [2024-06-20 17:47:09,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-20 17:47:09,898 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 395 transitions, 5760 flow [2024-06-20 17:47:09,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:09,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:09,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:09,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:47:09,898 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)] === [2024-06-20 17:47:09,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:09,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1137401483, now seen corresponding path program 7 times [2024-06-20 17:47:09,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:09,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807826896] [2024-06-20 17:47:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:09,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:10,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:10,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807826896] [2024-06-20 17:47:10,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807826896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:10,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:10,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:10,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719269922] [2024-06-20 17:47:10,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:10,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:10,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:10,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:10,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:10,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:10,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 395 transitions, 5760 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:10,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:10,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:10,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:10,772 INFO L124 PetriNetUnfolderBase]: 2149/3643 cut-off events. [2024-06-20 17:47:10,773 INFO L125 PetriNetUnfolderBase]: For 255174/255174 co-relation queries the response was YES. [2024-06-20 17:47:10,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26215 conditions, 3643 events. 2149/3643 cut-off events. For 255174/255174 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 22835 event pairs, 389 based on Foata normal form. 1/3639 useless extension candidates. Maximal degree in co-relation 26083. Up to 3011 conditions per place. [2024-06-20 17:47:10,814 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 254 selfloop transitions, 153 changer transitions 0/415 dead transitions. [2024-06-20 17:47:10,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 415 transitions, 6910 flow [2024-06-20 17:47:10,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 17:47:10,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 17:47:10,815 INFO L175 Difference]: Start difference. First operand has 298 places, 395 transitions, 5760 flow. Second operand 8 states and 193 transitions. [2024-06-20 17:47:10,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 415 transitions, 6910 flow [2024-06-20 17:47:11,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 415 transitions, 6402 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 17:47:11,689 INFO L231 Difference]: Finished difference. Result has 298 places, 395 transitions, 5564 flow [2024-06-20 17:47:11,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5252, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5564, PETRI_PLACES=298, PETRI_TRANSITIONS=395} [2024-06-20 17:47:11,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-20 17:47:11,689 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 395 transitions, 5564 flow [2024-06-20 17:47:11,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:11,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:11,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:11,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:47:11,690 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)] === [2024-06-20 17:47:11,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1200055309, now seen corresponding path program 8 times [2024-06-20 17:47:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:11,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157722191] [2024-06-20 17:47:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:11,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:11,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:11,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157722191] [2024-06-20 17:47:11,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157722191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:11,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:11,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:11,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134502496] [2024-06-20 17:47:11,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:11,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:11,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:11,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:11,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:11,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 395 transitions, 5564 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:11,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:11,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:11,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:12,688 INFO L124 PetriNetUnfolderBase]: 2154/3652 cut-off events. [2024-06-20 17:47:12,688 INFO L125 PetriNetUnfolderBase]: For 259343/259343 co-relation queries the response was YES. [2024-06-20 17:47:12,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26271 conditions, 3652 events. 2154/3652 cut-off events. For 259343/259343 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 22886 event pairs, 389 based on Foata normal form. 1/3648 useless extension candidates. Maximal degree in co-relation 26140. Up to 3017 conditions per place. [2024-06-20 17:47:12,724 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 166 changer transitions 0/419 dead transitions. [2024-06-20 17:47:12,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 419 transitions, 6932 flow [2024-06-20 17:47:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 17:47:12,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-20 17:47:12,726 INFO L175 Difference]: Start difference. First operand has 298 places, 395 transitions, 5564 flow. Second operand 8 states and 195 transitions. [2024-06-20 17:47:12,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 419 transitions, 6932 flow [2024-06-20 17:47:13,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 419 transitions, 6604 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:47:13,611 INFO L231 Difference]: Finished difference. Result has 298 places, 398 transitions, 5632 flow [2024-06-20 17:47:13,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5242, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5632, PETRI_PLACES=298, PETRI_TRANSITIONS=398} [2024-06-20 17:47:13,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-20 17:47:13,611 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 398 transitions, 5632 flow [2024-06-20 17:47:13,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:13,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:13,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:13,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:47:13,611 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)] === [2024-06-20 17:47:13,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1199609839, now seen corresponding path program 9 times [2024-06-20 17:47:13,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:13,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488764064] [2024-06-20 17:47:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:13,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:13,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:13,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488764064] [2024-06-20 17:47:13,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488764064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:13,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:13,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:13,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215286747] [2024-06-20 17:47:13,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:13,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:13,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:13,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:13,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:13,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:13,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 398 transitions, 5632 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:13,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:13,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:13,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:14,514 INFO L124 PetriNetUnfolderBase]: 2151/3648 cut-off events. [2024-06-20 17:47:14,514 INFO L125 PetriNetUnfolderBase]: For 262894/262894 co-relation queries the response was YES. [2024-06-20 17:47:14,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26270 conditions, 3648 events. 2151/3648 cut-off events. For 262894/262894 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 22861 event pairs, 389 based on Foata normal form. 1/3644 useless extension candidates. Maximal degree in co-relation 26138. Up to 3014 conditions per place. [2024-06-20 17:47:14,558 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 166 changer transitions 0/418 dead transitions. [2024-06-20 17:47:14,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 418 transitions, 6796 flow [2024-06-20 17:47:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 17:47:14,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 17:47:14,560 INFO L175 Difference]: Start difference. First operand has 298 places, 398 transitions, 5632 flow. Second operand 8 states and 193 transitions. [2024-06-20 17:47:14,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 418 transitions, 6796 flow [2024-06-20 17:47:15,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 418 transitions, 6296 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:15,474 INFO L231 Difference]: Finished difference. Result has 299 places, 398 transitions, 5470 flow [2024-06-20 17:47:15,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5470, PETRI_PLACES=299, PETRI_TRANSITIONS=398} [2024-06-20 17:47:15,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-20 17:47:15,474 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 398 transitions, 5470 flow [2024-06-20 17:47:15,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:15,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:15,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:15,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:47:15,475 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)] === [2024-06-20 17:47:15,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:15,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1920550865, now seen corresponding path program 10 times [2024-06-20 17:47:15,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:15,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112529012] [2024-06-20 17:47:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:15,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:15,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:15,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112529012] [2024-06-20 17:47:15,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112529012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:15,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:15,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:15,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174087134] [2024-06-20 17:47:15,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:15,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:15,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:15,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:15,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:15,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 398 transitions, 5470 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:15,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:15,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:15,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:16,433 INFO L124 PetriNetUnfolderBase]: 2148/3649 cut-off events. [2024-06-20 17:47:16,433 INFO L125 PetriNetUnfolderBase]: For 264724/264724 co-relation queries the response was YES. [2024-06-20 17:47:16,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26028 conditions, 3649 events. 2148/3649 cut-off events. For 264724/264724 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 22919 event pairs, 377 based on Foata normal form. 1/3648 useless extension candidates. Maximal degree in co-relation 25896. Up to 3233 conditions per place. [2024-06-20 17:47:16,475 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 357 selfloop transitions, 50 changer transitions 0/415 dead transitions. [2024-06-20 17:47:16,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 415 transitions, 6474 flow [2024-06-20 17:47:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 17:47:16,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-20 17:47:16,476 INFO L175 Difference]: Start difference. First operand has 299 places, 398 transitions, 5470 flow. Second operand 9 states and 206 transitions. [2024-06-20 17:47:16,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 415 transitions, 6474 flow [2024-06-20 17:47:17,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 415 transitions, 6122 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:17,356 INFO L231 Difference]: Finished difference. Result has 301 places, 398 transitions, 5224 flow [2024-06-20 17:47:17,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5118, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5224, PETRI_PLACES=301, PETRI_TRANSITIONS=398} [2024-06-20 17:47:17,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-20 17:47:17,356 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 398 transitions, 5224 flow [2024-06-20 17:47:17,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:17,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:17,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:17,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:47:17,357 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)] === [2024-06-20 17:47:17,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:17,357 INFO L85 PathProgramCache]: Analyzing trace with hash 19402839, now seen corresponding path program 11 times [2024-06-20 17:47:17,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:17,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899728447] [2024-06-20 17:47:17,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:17,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:17,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:17,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899728447] [2024-06-20 17:47:17,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899728447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:17,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:17,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:17,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714023160] [2024-06-20 17:47:17,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:17,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:17,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:17,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:17,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:17,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:17,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 398 transitions, 5224 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:17,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:17,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:17,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:18,256 INFO L124 PetriNetUnfolderBase]: 2145/3645 cut-off events. [2024-06-20 17:47:18,256 INFO L125 PetriNetUnfolderBase]: For 267050/267050 co-relation queries the response was YES. [2024-06-20 17:47:18,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25692 conditions, 3645 events. 2145/3645 cut-off events. For 267050/267050 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 22904 event pairs, 377 based on Foata normal form. 1/3644 useless extension candidates. Maximal degree in co-relation 25559. Up to 3230 conditions per place. [2024-06-20 17:47:18,298 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 356 selfloop transitions, 50 changer transitions 0/414 dead transitions. [2024-06-20 17:47:18,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 414 transitions, 6074 flow [2024-06-20 17:47:18,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-20 17:47:18,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 17:47:18,301 INFO L175 Difference]: Start difference. First operand has 301 places, 398 transitions, 5224 flow. Second operand 9 states and 205 transitions. [2024-06-20 17:47:18,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 414 transitions, 6074 flow [2024-06-20 17:47:19,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 414 transitions, 5940 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:47:19,226 INFO L231 Difference]: Finished difference. Result has 302 places, 398 transitions, 5196 flow [2024-06-20 17:47:19,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5090, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5196, PETRI_PLACES=302, PETRI_TRANSITIONS=398} [2024-06-20 17:47:19,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-20 17:47:19,227 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 398 transitions, 5196 flow [2024-06-20 17:47:19,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:19,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:19,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:19,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:47:19,227 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)] === [2024-06-20 17:47:19,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1214297419, now seen corresponding path program 12 times [2024-06-20 17:47:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:19,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512888292] [2024-06-20 17:47:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:19,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:19,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:19,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512888292] [2024-06-20 17:47:19,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512888292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:19,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:19,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:19,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784194239] [2024-06-20 17:47:19,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:19,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:19,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:19,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:19,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 398 transitions, 5196 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:19,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:19,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:19,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:20,118 INFO L124 PetriNetUnfolderBase]: 2142/3641 cut-off events. [2024-06-20 17:47:20,118 INFO L125 PetriNetUnfolderBase]: For 270340/270340 co-relation queries the response was YES. [2024-06-20 17:47:20,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25645 conditions, 3641 events. 2142/3641 cut-off events. For 270340/270340 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 22878 event pairs, 377 based on Foata normal form. 1/3640 useless extension candidates. Maximal degree in co-relation 25511. Up to 3089 conditions per place. [2024-06-20 17:47:20,163 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 308 selfloop transitions, 111 changer transitions 0/427 dead transitions. [2024-06-20 17:47:20,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 427 transitions, 6260 flow [2024-06-20 17:47:20,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-20 17:47:20,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-20 17:47:20,164 INFO L175 Difference]: Start difference. First operand has 302 places, 398 transitions, 5196 flow. Second operand 9 states and 221 transitions. [2024-06-20 17:47:20,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 427 transitions, 6260 flow [2024-06-20 17:47:21,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 427 transitions, 6126 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:47:21,273 INFO L231 Difference]: Finished difference. Result has 303 places, 398 transitions, 5294 flow [2024-06-20 17:47:21,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5294, PETRI_PLACES=303, PETRI_TRANSITIONS=398} [2024-06-20 17:47:21,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-20 17:47:21,274 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 398 transitions, 5294 flow [2024-06-20 17:47:21,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:21,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:21,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:21,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:47:21,274 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)] === [2024-06-20 17:47:21,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:21,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1372520739, now seen corresponding path program 13 times [2024-06-20 17:47:21,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:21,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957590177] [2024-06-20 17:47:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:21,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:21,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957590177] [2024-06-20 17:47:21,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957590177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:21,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:21,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:21,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029234483] [2024-06-20 17:47:21,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:21,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:21,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:21,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:21,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:21,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:21,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 398 transitions, 5294 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:21,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:21,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:21,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:22,231 INFO L124 PetriNetUnfolderBase]: 2147/3648 cut-off events. [2024-06-20 17:47:22,231 INFO L125 PetriNetUnfolderBase]: For 277464/277464 co-relation queries the response was YES. [2024-06-20 17:47:22,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25965 conditions, 3648 events. 2147/3648 cut-off events. For 277464/277464 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 22895 event pairs, 377 based on Foata normal form. 1/3647 useless extension candidates. Maximal degree in co-relation 25830. Up to 3095 conditions per place. [2024-06-20 17:47:22,276 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 313 selfloop transitions, 109 changer transitions 0/430 dead transitions. [2024-06-20 17:47:22,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 430 transitions, 6418 flow [2024-06-20 17:47:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:22,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 17:47:22,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 17:47:22,277 INFO L175 Difference]: Start difference. First operand has 303 places, 398 transitions, 5294 flow. Second operand 9 states and 222 transitions. [2024-06-20 17:47:22,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 430 transitions, 6418 flow [2024-06-20 17:47:23,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 430 transitions, 6136 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 17:47:23,313 INFO L231 Difference]: Finished difference. Result has 303 places, 401 transitions, 5294 flow [2024-06-20 17:47:23,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5020, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5294, PETRI_PLACES=303, PETRI_TRANSITIONS=401} [2024-06-20 17:47:23,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-20 17:47:23,313 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 401 transitions, 5294 flow [2024-06-20 17:47:23,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:23,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:23,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:23,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:47:23,314 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)] === [2024-06-20 17:47:23,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:23,314 INFO L85 PathProgramCache]: Analyzing trace with hash 811157213, now seen corresponding path program 14 times [2024-06-20 17:47:23,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:23,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68048133] [2024-06-20 17:47:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:23,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:23,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:23,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68048133] [2024-06-20 17:47:23,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68048133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:23,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:23,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:23,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124087468] [2024-06-20 17:47:23,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:23,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:23,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:23,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:23,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:23,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 401 transitions, 5294 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:23,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:23,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:23,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:24,261 INFO L124 PetriNetUnfolderBase]: 2152/3658 cut-off events. [2024-06-20 17:47:24,261 INFO L125 PetriNetUnfolderBase]: For 277652/277655 co-relation queries the response was YES. [2024-06-20 17:47:24,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25979 conditions, 3658 events. 2152/3658 cut-off events. For 277652/277655 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 22962 event pairs, 385 based on Foata normal form. 3/3658 useless extension candidates. Maximal degree in co-relation 25844. Up to 3101 conditions per place. [2024-06-20 17:47:24,305 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 308 selfloop transitions, 113 changer transitions 0/429 dead transitions. [2024-06-20 17:47:24,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 429 transitions, 6406 flow [2024-06-20 17:47:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 17:47:24,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 17:47:24,306 INFO L175 Difference]: Start difference. First operand has 303 places, 401 transitions, 5294 flow. Second operand 8 states and 198 transitions. [2024-06-20 17:47:24,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 429 transitions, 6406 flow [2024-06-20 17:47:25,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 429 transitions, 6209 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:25,281 INFO L231 Difference]: Finished difference. Result has 304 places, 404 transitions, 5383 flow [2024-06-20 17:47:25,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5102, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5383, PETRI_PLACES=304, PETRI_TRANSITIONS=404} [2024-06-20 17:47:25,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-20 17:47:25,281 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 404 transitions, 5383 flow [2024-06-20 17:47:25,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:25,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:25,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:25,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:47:25,282 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)] === [2024-06-20 17:47:25,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:25,282 INFO L85 PathProgramCache]: Analyzing trace with hash 811359023, now seen corresponding path program 15 times [2024-06-20 17:47:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:25,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966554082] [2024-06-20 17:47:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:25,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:25,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:25,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966554082] [2024-06-20 17:47:25,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966554082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:25,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:25,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:25,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800693213] [2024-06-20 17:47:25,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:25,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:25,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:25,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:25,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:25,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 404 transitions, 5383 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:25,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:25,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:25,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:26,223 INFO L124 PetriNetUnfolderBase]: 2149/3656 cut-off events. [2024-06-20 17:47:26,223 INFO L125 PetriNetUnfolderBase]: For 275004/275007 co-relation queries the response was YES. [2024-06-20 17:47:26,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25883 conditions, 3656 events. 2149/3656 cut-off events. For 275004/275007 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 22985 event pairs, 385 based on Foata normal form. 3/3656 useless extension candidates. Maximal degree in co-relation 25748. Up to 3098 conditions per place. [2024-06-20 17:47:26,268 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 113 changer transitions 0/426 dead transitions. [2024-06-20 17:47:26,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 426 transitions, 6273 flow [2024-06-20 17:47:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-20 17:47:26,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-20 17:47:26,269 INFO L175 Difference]: Start difference. First operand has 304 places, 404 transitions, 5383 flow. Second operand 9 states and 213 transitions. [2024-06-20 17:47:26,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 426 transitions, 6273 flow [2024-06-20 17:47:27,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 426 transitions, 6056 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:47:27,390 INFO L231 Difference]: Finished difference. Result has 308 places, 404 transitions, 5398 flow [2024-06-20 17:47:27,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5166, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5398, PETRI_PLACES=308, PETRI_TRANSITIONS=404} [2024-06-20 17:47:27,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-20 17:47:27,390 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 404 transitions, 5398 flow [2024-06-20 17:47:27,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:27,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:27,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:27,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:47:27,391 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)] === [2024-06-20 17:47:27,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:27,391 INFO L85 PathProgramCache]: Analyzing trace with hash -613418445, now seen corresponding path program 1 times [2024-06-20 17:47:27,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:27,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282931208] [2024-06-20 17:47:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:27,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:27,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:27,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282931208] [2024-06-20 17:47:27,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282931208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:27,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:27,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:27,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721850078] [2024-06-20 17:47:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:27,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:27,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:27,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:27,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:27,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:27,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 404 transitions, 5398 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:27,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:27,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:27,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:28,342 INFO L124 PetriNetUnfolderBase]: 2268/3860 cut-off events. [2024-06-20 17:47:28,342 INFO L125 PetriNetUnfolderBase]: For 361222/361222 co-relation queries the response was YES. [2024-06-20 17:47:28,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28239 conditions, 3860 events. 2268/3860 cut-off events. For 361222/361222 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 24594 event pairs, 383 based on Foata normal form. 12/3867 useless extension candidates. Maximal degree in co-relation 28103. Up to 2732 conditions per place. [2024-06-20 17:47:28,390 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 239 selfloop transitions, 191 changer transitions 0/438 dead transitions. [2024-06-20 17:47:28,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 438 transitions, 6606 flow [2024-06-20 17:47:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 17:47:28,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 17:47:28,391 INFO L175 Difference]: Start difference. First operand has 308 places, 404 transitions, 5398 flow. Second operand 8 states and 201 transitions. [2024-06-20 17:47:28,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 438 transitions, 6606 flow [2024-06-20 17:47:29,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 438 transitions, 6161 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-20 17:47:29,623 INFO L231 Difference]: Finished difference. Result has 305 places, 408 transitions, 5428 flow [2024-06-20 17:47:29,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4953, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5428, PETRI_PLACES=305, PETRI_TRANSITIONS=408} [2024-06-20 17:47:29,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-20 17:47:29,624 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 408 transitions, 5428 flow [2024-06-20 17:47:29,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:29,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:29,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:29,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:47:29,625 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)] === [2024-06-20 17:47:29,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:29,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1199747789, now seen corresponding path program 2 times [2024-06-20 17:47:29,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:29,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718703669] [2024-06-20 17:47:29,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:29,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:29,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:29,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718703669] [2024-06-20 17:47:29,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718703669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:29,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:29,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:29,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980602458] [2024-06-20 17:47:29,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:29,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:29,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:29,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:29,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:29,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:29,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 408 transitions, 5428 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:29,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:29,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:29,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:30,656 INFO L124 PetriNetUnfolderBase]: 2400/4059 cut-off events. [2024-06-20 17:47:30,656 INFO L125 PetriNetUnfolderBase]: For 425388/425388 co-relation queries the response was YES. [2024-06-20 17:47:30,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31087 conditions, 4059 events. 2400/4059 cut-off events. For 425388/425388 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 25894 event pairs, 454 based on Foata normal form. 12/4066 useless extension candidates. Maximal degree in co-relation 30951. Up to 3243 conditions per place. [2024-06-20 17:47:30,703 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 178 changer transitions 0/438 dead transitions. [2024-06-20 17:47:30,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 438 transitions, 6636 flow [2024-06-20 17:47:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 17:47:30,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 17:47:30,704 INFO L175 Difference]: Start difference. First operand has 305 places, 408 transitions, 5428 flow. Second operand 8 states and 198 transitions. [2024-06-20 17:47:30,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 438 transitions, 6636 flow [2024-06-20 17:47:31,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 438 transitions, 6390 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 17:47:31,978 INFO L231 Difference]: Finished difference. Result has 309 places, 412 transitions, 5639 flow [2024-06-20 17:47:31,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5182, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5639, PETRI_PLACES=309, PETRI_TRANSITIONS=412} [2024-06-20 17:47:31,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-20 17:47:31,979 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 412 transitions, 5639 flow [2024-06-20 17:47:31,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:31,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:31,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:31,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:47:31,979 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)] === [2024-06-20 17:47:31,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:31,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1888500773, now seen corresponding path program 3 times [2024-06-20 17:47:31,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:31,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254985487] [2024-06-20 17:47:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:31,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:32,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:32,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254985487] [2024-06-20 17:47:32,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254985487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:32,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:32,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:32,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036859478] [2024-06-20 17:47:32,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:32,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:32,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:32,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:32,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:32,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:32,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 412 transitions, 5639 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:32,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:32,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:32,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:32,920 INFO L124 PetriNetUnfolderBase]: 2364/4005 cut-off events. [2024-06-20 17:47:32,920 INFO L125 PetriNetUnfolderBase]: For 396705/396705 co-relation queries the response was YES. [2024-06-20 17:47:32,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29880 conditions, 4005 events. 2364/4005 cut-off events. For 396705/396705 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 25565 event pairs, 450 based on Foata normal form. 16/4016 useless extension candidates. Maximal degree in co-relation 29742. Up to 3287 conditions per place. [2024-06-20 17:47:32,969 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 174 changer transitions 0/434 dead transitions. [2024-06-20 17:47:32,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 434 transitions, 6567 flow [2024-06-20 17:47:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 17:47:32,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 17:47:32,970 INFO L175 Difference]: Start difference. First operand has 309 places, 412 transitions, 5639 flow. Second operand 8 states and 194 transitions. [2024-06-20 17:47:32,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 434 transitions, 6567 flow [2024-06-20 17:47:34,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 434 transitions, 6303 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 17:47:34,111 INFO L231 Difference]: Finished difference. Result has 313 places, 412 transitions, 5729 flow [2024-06-20 17:47:34,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5375, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5729, PETRI_PLACES=313, PETRI_TRANSITIONS=412} [2024-06-20 17:47:34,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-20 17:47:34,112 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 412 transitions, 5729 flow [2024-06-20 17:47:34,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:34,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:34,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:34,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:47:34,112 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)] === [2024-06-20 17:47:34,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:34,112 INFO L85 PathProgramCache]: Analyzing trace with hash 28126859, now seen corresponding path program 4 times [2024-06-20 17:47:34,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:34,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502464635] [2024-06-20 17:47:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:34,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:34,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:34,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502464635] [2024-06-20 17:47:34,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502464635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:34,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:34,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:34,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995893597] [2024-06-20 17:47:34,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:34,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:34,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:34,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:34,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:34,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 412 transitions, 5729 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:34,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:34,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:34,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:35,155 INFO L124 PetriNetUnfolderBase]: 2420/4104 cut-off events. [2024-06-20 17:47:35,155 INFO L125 PetriNetUnfolderBase]: For 404299/404299 co-relation queries the response was YES. [2024-06-20 17:47:35,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30694 conditions, 4104 events. 2420/4104 cut-off events. For 404299/404299 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 26317 event pairs, 448 based on Foata normal form. 16/4118 useless extension candidates. Maximal degree in co-relation 30554. Up to 3597 conditions per place. [2024-06-20 17:47:35,206 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 52 changer transitions 0/434 dead transitions. [2024-06-20 17:47:35,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 434 transitions, 6701 flow [2024-06-20 17:47:35,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 17:47:35,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-20 17:47:35,207 INFO L175 Difference]: Start difference. First operand has 313 places, 412 transitions, 5729 flow. Second operand 9 states and 208 transitions. [2024-06-20 17:47:35,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 434 transitions, 6701 flow [2024-06-20 17:47:36,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 434 transitions, 6345 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:36,507 INFO L231 Difference]: Finished difference. Result has 315 places, 414 transitions, 5537 flow [2024-06-20 17:47:36,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5373, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5537, PETRI_PLACES=315, PETRI_TRANSITIONS=414} [2024-06-20 17:47:36,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-20 17:47:36,508 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 414 transitions, 5537 flow [2024-06-20 17:47:36,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:36,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:36,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:36,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:47:36,509 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)] === [2024-06-20 17:47:36,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:36,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1920688815, now seen corresponding path program 5 times [2024-06-20 17:47:36,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:36,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291221337] [2024-06-20 17:47:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:36,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:36,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:36,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291221337] [2024-06-20 17:47:36,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291221337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:36,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:36,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:36,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528908797] [2024-06-20 17:47:36,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:36,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:36,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:36,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:36,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:36,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:36,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 414 transitions, 5537 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:36,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:36,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:36,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:37,671 INFO L124 PetriNetUnfolderBase]: 2506/4242 cut-off events. [2024-06-20 17:47:37,671 INFO L125 PetriNetUnfolderBase]: For 429560/429560 co-relation queries the response was YES. [2024-06-20 17:47:37,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32143 conditions, 4242 events. 2506/4242 cut-off events. For 429560/429560 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 27253 event pairs, 458 based on Foata normal form. 12/4252 useless extension candidates. Maximal degree in co-relation 32002. Up to 3557 conditions per place. [2024-06-20 17:47:37,719 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 59 changer transitions 0/441 dead transitions. [2024-06-20 17:47:37,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 441 transitions, 6737 flow [2024-06-20 17:47:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-20 17:47:37,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-20 17:47:37,722 INFO L175 Difference]: Start difference. First operand has 315 places, 414 transitions, 5537 flow. Second operand 9 states and 211 transitions. [2024-06-20 17:47:37,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 441 transitions, 6737 flow [2024-06-20 17:47:39,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 441 transitions, 6609 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:39,079 INFO L231 Difference]: Finished difference. Result has 317 places, 417 transitions, 5614 flow [2024-06-20 17:47:39,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5614, PETRI_PLACES=317, PETRI_TRANSITIONS=417} [2024-06-20 17:47:39,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-20 17:47:39,079 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 417 transitions, 5614 flow [2024-06-20 17:47:39,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:39,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:39,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:39,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:47:39,080 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)] === [2024-06-20 17:47:39,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1914963363, now seen corresponding path program 1 times [2024-06-20 17:47:39,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:39,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502028160] [2024-06-20 17:47:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:39,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:39,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:39,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502028160] [2024-06-20 17:47:39,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502028160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:39,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:39,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:39,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178941657] [2024-06-20 17:47:39,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:39,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:39,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:39,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:39,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:39,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 417 transitions, 5614 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:39,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:39,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:39,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:40,168 INFO L124 PetriNetUnfolderBase]: 2612/4418 cut-off events. [2024-06-20 17:47:40,168 INFO L125 PetriNetUnfolderBase]: For 477069/477069 co-relation queries the response was YES. [2024-06-20 17:47:40,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34158 conditions, 4418 events. 2612/4418 cut-off events. For 477069/477069 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 28602 event pairs, 483 based on Foata normal form. 12/4428 useless extension candidates. Maximal degree in co-relation 34016. Up to 3773 conditions per place. [2024-06-20 17:47:40,228 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 403 selfloop transitions, 34 changer transitions 0/445 dead transitions. [2024-06-20 17:47:40,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 445 transitions, 6838 flow [2024-06-20 17:47:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 17:47:40,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-20 17:47:40,230 INFO L175 Difference]: Start difference. First operand has 317 places, 417 transitions, 5614 flow. Second operand 9 states and 208 transitions. [2024-06-20 17:47:40,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 445 transitions, 6838 flow [2024-06-20 17:47:41,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 445 transitions, 6735 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 17:47:41,921 INFO L231 Difference]: Finished difference. Result has 322 places, 421 transitions, 5693 flow [2024-06-20 17:47:41,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5693, PETRI_PLACES=322, PETRI_TRANSITIONS=421} [2024-06-20 17:47:41,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-20 17:47:41,922 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 421 transitions, 5693 flow [2024-06-20 17:47:41,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:41,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:41,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:41,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:47:41,922 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)] === [2024-06-20 17:47:41,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1214307339, now seen corresponding path program 6 times [2024-06-20 17:47:41,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:41,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520179823] [2024-06-20 17:47:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:41,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:42,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520179823] [2024-06-20 17:47:42,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520179823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:42,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:42,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:42,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299269159] [2024-06-20 17:47:42,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:42,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:42,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:42,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:42,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 421 transitions, 5693 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:42,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:42,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:42,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:43,117 INFO L124 PetriNetUnfolderBase]: 2655/4501 cut-off events. [2024-06-20 17:47:43,117 INFO L125 PetriNetUnfolderBase]: For 495770/495770 co-relation queries the response was YES. [2024-06-20 17:47:43,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34734 conditions, 4501 events. 2655/4501 cut-off events. For 495770/495770 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 29317 event pairs, 517 based on Foata normal form. 16/4515 useless extension candidates. Maximal degree in co-relation 34589. Up to 3764 conditions per place. [2024-06-20 17:47:43,176 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 121 changer transitions 0/455 dead transitions. [2024-06-20 17:47:43,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 455 transitions, 6747 flow [2024-06-20 17:47:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-20 17:47:43,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2024-06-20 17:47:43,177 INFO L175 Difference]: Start difference. First operand has 322 places, 421 transitions, 5693 flow. Second operand 9 states and 223 transitions. [2024-06-20 17:47:43,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 455 transitions, 6747 flow [2024-06-20 17:47:45,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 455 transitions, 6684 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 17:47:45,059 INFO L231 Difference]: Finished difference. Result has 327 places, 423 transitions, 5944 flow [2024-06-20 17:47:45,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5630, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5944, PETRI_PLACES=327, PETRI_TRANSITIONS=423} [2024-06-20 17:47:45,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-20 17:47:45,059 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 423 transitions, 5944 flow [2024-06-20 17:47:45,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:45,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:45,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:45,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:47:45,059 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)] === [2024-06-20 17:47:45,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:45,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1363944589, now seen corresponding path program 7 times [2024-06-20 17:47:45,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:45,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403577942] [2024-06-20 17:47:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:45,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:45,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:45,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403577942] [2024-06-20 17:47:45,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403577942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:45,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:45,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:45,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602678136] [2024-06-20 17:47:45,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:45,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:45,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:45,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:45,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:45,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:45,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 423 transitions, 5944 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:45,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:45,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:45,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:46,320 INFO L124 PetriNetUnfolderBase]: 2708/4589 cut-off events. [2024-06-20 17:47:46,320 INFO L125 PetriNetUnfolderBase]: For 502360/502360 co-relation queries the response was YES. [2024-06-20 17:47:46,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35902 conditions, 4589 events. 2708/4589 cut-off events. For 502360/502360 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29953 event pairs, 438 based on Foata normal form. 12/4599 useless extension candidates. Maximal degree in co-relation 35755. Up to 3455 conditions per place. [2024-06-20 17:47:46,382 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 318 selfloop transitions, 138 changer transitions 0/464 dead transitions. [2024-06-20 17:47:46,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 464 transitions, 7214 flow [2024-06-20 17:47:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:46,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-20 17:47:46,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233062330623306 [2024-06-20 17:47:46,384 INFO L175 Difference]: Start difference. First operand has 327 places, 423 transitions, 5944 flow. Second operand 9 states and 230 transitions. [2024-06-20 17:47:46,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 464 transitions, 7214 flow [2024-06-20 17:47:48,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 464 transitions, 6950 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:48,325 INFO L231 Difference]: Finished difference. Result has 329 places, 425 transitions, 6022 flow [2024-06-20 17:47:48,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6022, PETRI_PLACES=329, PETRI_TRANSITIONS=425} [2024-06-20 17:47:48,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-20 17:47:48,325 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 425 transitions, 6022 flow [2024-06-20 17:47:48,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:48,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:48,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:47:48,326 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)] === [2024-06-20 17:47:48,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 204921963, now seen corresponding path program 2 times [2024-06-20 17:47:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:48,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746421191] [2024-06-20 17:47:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:48,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:48,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746421191] [2024-06-20 17:47:48,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746421191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:48,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:48,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:48,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472664942] [2024-06-20 17:47:48,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:48,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:48,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:48,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:48,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:48,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 425 transitions, 6022 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:48,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:48,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:48,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:49,482 INFO L124 PetriNetUnfolderBase]: 2903/4901 cut-off events. [2024-06-20 17:47:49,483 INFO L125 PetriNetUnfolderBase]: For 556589/556589 co-relation queries the response was YES. [2024-06-20 17:47:49,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39130 conditions, 4901 events. 2903/4901 cut-off events. For 556589/556589 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 32310 event pairs, 534 based on Foata normal form. 12/4911 useless extension candidates. Maximal degree in co-relation 38982. Up to 3995 conditions per place. [2024-06-20 17:47:49,552 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 410 selfloop transitions, 49 changer transitions 0/467 dead transitions. [2024-06-20 17:47:49,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 467 transitions, 7565 flow [2024-06-20 17:47:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:49,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 17:47:49,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-20 17:47:49,553 INFO L175 Difference]: Start difference. First operand has 329 places, 425 transitions, 6022 flow. Second operand 8 states and 189 transitions. [2024-06-20 17:47:49,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 467 transitions, 7565 flow [2024-06-20 17:47:51,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 467 transitions, 7346 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 17:47:51,720 INFO L231 Difference]: Finished difference. Result has 334 places, 440 transitions, 6270 flow [2024-06-20 17:47:51,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5820, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6270, PETRI_PLACES=334, PETRI_TRANSITIONS=440} [2024-06-20 17:47:51,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-20 17:47:51,721 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 440 transitions, 6270 flow [2024-06-20 17:47:51,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:51,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:51,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:51,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:47:51,721 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)] === [2024-06-20 17:47:51,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:51,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1164279727, now seen corresponding path program 3 times [2024-06-20 17:47:51,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:51,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60137945] [2024-06-20 17:47:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:51,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:51,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:51,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60137945] [2024-06-20 17:47:51,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60137945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:51,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:51,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:51,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267244631] [2024-06-20 17:47:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:51,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:51,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:52,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:52,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 440 transitions, 6270 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:52,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:52,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:52,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:52,993 INFO L124 PetriNetUnfolderBase]: 3022/5105 cut-off events. [2024-06-20 17:47:52,994 INFO L125 PetriNetUnfolderBase]: For 604451/604451 co-relation queries the response was YES. [2024-06-20 17:47:53,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41804 conditions, 5105 events. 3022/5105 cut-off events. For 604451/604451 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 33906 event pairs, 459 based on Foata normal form. 12/5115 useless extension candidates. Maximal degree in co-relation 41652. Up to 3723 conditions per place. [2024-06-20 17:47:53,062 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 369 selfloop transitions, 103 changer transitions 0/480 dead transitions. [2024-06-20 17:47:53,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 480 transitions, 7630 flow [2024-06-20 17:47:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 17:47:53,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-20 17:47:53,063 INFO L175 Difference]: Start difference. First operand has 334 places, 440 transitions, 6270 flow. Second operand 8 states and 207 transitions. [2024-06-20 17:47:53,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 480 transitions, 7630 flow [2024-06-20 17:47:55,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 480 transitions, 7556 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-20 17:47:55,614 INFO L231 Difference]: Finished difference. Result has 342 places, 445 transitions, 6596 flow [2024-06-20 17:47:55,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6206, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6596, PETRI_PLACES=342, PETRI_TRANSITIONS=445} [2024-06-20 17:47:55,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-20 17:47:55,615 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 445 transitions, 6596 flow [2024-06-20 17:47:55,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:55,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:55,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:55,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:47:55,615 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)] === [2024-06-20 17:47:55,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1677446497, now seen corresponding path program 4 times [2024-06-20 17:47:55,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:55,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813142261] [2024-06-20 17:47:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:55,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:55,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:55,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813142261] [2024-06-20 17:47:55,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813142261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:55,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:55,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:55,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847835906] [2024-06-20 17:47:55,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:55,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:55,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:55,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:55,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:55,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:47:55,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 445 transitions, 6596 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:55,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:55,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:47:55,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:56,908 INFO L124 PetriNetUnfolderBase]: 3082/5212 cut-off events. [2024-06-20 17:47:56,908 INFO L125 PetriNetUnfolderBase]: For 613818/613821 co-relation queries the response was YES. [2024-06-20 17:47:56,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43333 conditions, 5212 events. 3082/5212 cut-off events. For 613818/613821 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34856 event pairs, 474 based on Foata normal form. 14/5223 useless extension candidates. Maximal degree in co-relation 43178. Up to 3670 conditions per place. [2024-06-20 17:47:56,982 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 378 selfloop transitions, 97 changer transitions 0/483 dead transitions. [2024-06-20 17:47:56,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 483 transitions, 8142 flow [2024-06-20 17:47:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:47:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:47:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 17:47:56,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-20 17:47:56,984 INFO L175 Difference]: Start difference. First operand has 342 places, 445 transitions, 6596 flow. Second operand 7 states and 185 transitions. [2024-06-20 17:47:56,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 483 transitions, 8142 flow [2024-06-20 17:47:59,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 483 transitions, 7987 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 17:47:59,322 INFO L231 Difference]: Finished difference. Result has 347 places, 451 transitions, 6834 flow [2024-06-20 17:47:59,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6453, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6834, PETRI_PLACES=347, PETRI_TRANSITIONS=451} [2024-06-20 17:47:59,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-20 17:47:59,323 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 451 transitions, 6834 flow [2024-06-20 17:47:59,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:59,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:59,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:59,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:47:59,323 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)] === [2024-06-20 17:47:59,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1925310823, now seen corresponding path program 1 times [2024-06-20 17:47:59,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:59,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428956911] [2024-06-20 17:47:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:59,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:59,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:59,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428956911] [2024-06-20 17:47:59,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428956911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:59,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:59,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:59,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807244813] [2024-06-20 17:47:59,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:59,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:59,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:59,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:59,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:59,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:47:59,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 451 transitions, 6834 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) [2024-06-20 17:47:59,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:59,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:47:59,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:00,570 INFO L124 PetriNetUnfolderBase]: 3087/5229 cut-off events. [2024-06-20 17:48:00,570 INFO L125 PetriNetUnfolderBase]: For 572052/572052 co-relation queries the response was YES. [2024-06-20 17:48:00,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43975 conditions, 5229 events. 3087/5229 cut-off events. For 572052/572052 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 35173 event pairs, 645 based on Foata normal form. 1/5222 useless extension candidates. Maximal degree in co-relation 43815. Up to 4562 conditions per place. [2024-06-20 17:48:00,643 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 99 changer transitions 0/471 dead transitions. [2024-06-20 17:48:00,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 471 transitions, 8012 flow [2024-06-20 17:48:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:48:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:48:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 17:48:00,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-20 17:48:00,644 INFO L175 Difference]: Start difference. First operand has 347 places, 451 transitions, 6834 flow. Second operand 6 states and 149 transitions. [2024-06-20 17:48:00,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 471 transitions, 8012 flow [2024-06-20 17:48:03,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 471 transitions, 7873 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-20 17:48:03,569 INFO L231 Difference]: Finished difference. Result has 351 places, 454 transitions, 6938 flow [2024-06-20 17:48:03,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6695, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6938, PETRI_PLACES=351, PETRI_TRANSITIONS=454} [2024-06-20 17:48:03,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-20 17:48:03,570 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 454 transitions, 6938 flow [2024-06-20 17:48:03,570 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) [2024-06-20 17:48:03,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:03,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:03,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:48:03,570 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)] === [2024-06-20 17:48:03,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash -552932255, now seen corresponding path program 1 times [2024-06-20 17:48:03,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:03,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762468898] [2024-06-20 17:48:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:03,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:03,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:03,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762468898] [2024-06-20 17:48:03,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762468898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:03,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:03,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:48:03,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255064325] [2024-06-20 17:48:03,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:03,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:48:03,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:03,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:48:03,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:48:03,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:48:03,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 454 transitions, 6938 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:03,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:03,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:48:03,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:04,856 INFO L124 PetriNetUnfolderBase]: 3100/5259 cut-off events. [2024-06-20 17:48:04,856 INFO L125 PetriNetUnfolderBase]: For 588678/588678 co-relation queries the response was YES. [2024-06-20 17:48:04,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44249 conditions, 5259 events. 3100/5259 cut-off events. For 588678/588678 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 35326 event pairs, 627 based on Foata normal form. 1/5258 useless extension candidates. Maximal degree in co-relation 44088. Up to 4685 conditions per place. [2024-06-20 17:48:04,932 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 423 selfloop transitions, 57 changer transitions 0/488 dead transitions. [2024-06-20 17:48:04,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 488 transitions, 8264 flow [2024-06-20 17:48:04,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:48:04,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:48:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 17:48:04,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 17:48:04,933 INFO L175 Difference]: Start difference. First operand has 351 places, 454 transitions, 6938 flow. Second operand 8 states and 197 transitions. [2024-06-20 17:48:04,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 488 transitions, 8264 flow [2024-06-20 17:48:07,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 488 transitions, 8039 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:48:07,736 INFO L231 Difference]: Finished difference. Result has 354 places, 460 transitions, 6961 flow [2024-06-20 17:48:07,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6715, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6961, PETRI_PLACES=354, PETRI_TRANSITIONS=460} [2024-06-20 17:48:07,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-20 17:48:07,736 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 460 transitions, 6961 flow [2024-06-20 17:48:07,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:07,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:07,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:07,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:48:07,737 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)] === [2024-06-20 17:48:07,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:07,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1409757315, now seen corresponding path program 2 times [2024-06-20 17:48:07,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:07,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564826402] [2024-06-20 17:48:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:07,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:08,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:08,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564826402] [2024-06-20 17:48:08,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564826402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:08,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:08,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:08,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826207022] [2024-06-20 17:48:08,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:08,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:08,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:08,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:08,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 460 transitions, 6961 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:08,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:08,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:08,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:09,174 INFO L124 PetriNetUnfolderBase]: 3105/5270 cut-off events. [2024-06-20 17:48:09,175 INFO L125 PetriNetUnfolderBase]: For 590676/590676 co-relation queries the response was YES. [2024-06-20 17:48:09,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44422 conditions, 5270 events. 3105/5270 cut-off events. For 590676/590676 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35455 event pairs, 626 based on Foata normal form. 1/5269 useless extension candidates. Maximal degree in co-relation 44261. Up to 4709 conditions per place. [2024-06-20 17:48:09,243 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 427 selfloop transitions, 49 changer transitions 0/483 dead transitions. [2024-06-20 17:48:09,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 483 transitions, 7994 flow [2024-06-20 17:48:09,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:48:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:48:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 17:48:09,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 17:48:09,244 INFO L175 Difference]: Start difference. First operand has 354 places, 460 transitions, 6961 flow. Second operand 7 states and 164 transitions. [2024-06-20 17:48:09,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 483 transitions, 7994 flow [2024-06-20 17:48:11,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 483 transitions, 7752 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-20 17:48:11,941 INFO L231 Difference]: Finished difference. Result has 354 places, 463 transitions, 6864 flow [2024-06-20 17:48:11,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6719, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6864, PETRI_PLACES=354, PETRI_TRANSITIONS=463} [2024-06-20 17:48:11,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-20 17:48:11,941 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 463 transitions, 6864 flow [2024-06-20 17:48:11,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:11,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:11,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:11,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:48:11,942 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)] === [2024-06-20 17:48:11,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash -415376299, now seen corresponding path program 2 times [2024-06-20 17:48:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:11,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695946166] [2024-06-20 17:48:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:12,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:12,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695946166] [2024-06-20 17:48:12,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695946166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:12,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:12,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:12,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074544857] [2024-06-20 17:48:12,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:12,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:12,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:12,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:12,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:12,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:12,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 463 transitions, 6864 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:12,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:12,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:12,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:13,238 INFO L124 PetriNetUnfolderBase]: 3118/5288 cut-off events. [2024-06-20 17:48:13,238 INFO L125 PetriNetUnfolderBase]: For 606157/606157 co-relation queries the response was YES. [2024-06-20 17:48:13,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44724 conditions, 5288 events. 3118/5288 cut-off events. For 606157/606157 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 35545 event pairs, 627 based on Foata normal form. 1/5287 useless extension candidates. Maximal degree in co-relation 44564. Up to 4671 conditions per place. [2024-06-20 17:48:13,311 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 399 selfloop transitions, 87 changer transitions 0/493 dead transitions. [2024-06-20 17:48:13,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 493 transitions, 8354 flow [2024-06-20 17:48:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:48:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:48:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-20 17:48:13,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-20 17:48:13,312 INFO L175 Difference]: Start difference. First operand has 354 places, 463 transitions, 6864 flow. Second operand 9 states and 210 transitions. [2024-06-20 17:48:13,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 493 transitions, 8354 flow [2024-06-20 17:48:16,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 493 transitions, 8238 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:48:16,751 INFO L231 Difference]: Finished difference. Result has 357 places, 469 transitions, 7040 flow [2024-06-20 17:48:16,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6752, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7040, PETRI_PLACES=357, PETRI_TRANSITIONS=469} [2024-06-20 17:48:16,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-20 17:48:16,752 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 469 transitions, 7040 flow [2024-06-20 17:48:16,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:16,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:16,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:16,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:48:16,752 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)] === [2024-06-20 17:48:16,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:16,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1232388459, now seen corresponding path program 3 times [2024-06-20 17:48:16,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:16,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369735831] [2024-06-20 17:48:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:16,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:17,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:17,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369735831] [2024-06-20 17:48:17,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369735831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:17,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:17,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:17,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388118303] [2024-06-20 17:48:17,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:17,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:17,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:17,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:17,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:17,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:17,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 469 transitions, 7040 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:17,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:17,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:17,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:18,092 INFO L124 PetriNetUnfolderBase]: 3115/5284 cut-off events. [2024-06-20 17:48:18,092 INFO L125 PetriNetUnfolderBase]: For 602396/602396 co-relation queries the response was YES. [2024-06-20 17:48:18,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44677 conditions, 5284 events. 3115/5284 cut-off events. For 602396/602396 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 35527 event pairs, 627 based on Foata normal form. 1/5283 useless extension candidates. Maximal degree in co-relation 44517. Up to 4668 conditions per place. [2024-06-20 17:48:18,169 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 395 selfloop transitions, 91 changer transitions 0/493 dead transitions. [2024-06-20 17:48:18,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 493 transitions, 8248 flow [2024-06-20 17:48:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:48:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:48:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-20 17:48:18,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-20 17:48:18,170 INFO L175 Difference]: Start difference. First operand has 357 places, 469 transitions, 7040 flow. Second operand 10 states and 225 transitions. [2024-06-20 17:48:18,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 493 transitions, 8248 flow [2024-06-20 17:48:20,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 493 transitions, 8047 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 17:48:20,820 INFO L231 Difference]: Finished difference. Result has 361 places, 469 transitions, 7033 flow [2024-06-20 17:48:20,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6841, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7033, PETRI_PLACES=361, PETRI_TRANSITIONS=469} [2024-06-20 17:48:20,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-20 17:48:20,821 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 469 transitions, 7033 flow [2024-06-20 17:48:20,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:20,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:20,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:20,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:48:20,821 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)] === [2024-06-20 17:48:20,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:20,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1232625795, now seen corresponding path program 3 times [2024-06-20 17:48:20,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:20,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235292071] [2024-06-20 17:48:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:20,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:21,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:21,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235292071] [2024-06-20 17:48:21,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235292071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:21,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:21,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:21,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199147130] [2024-06-20 17:48:21,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:21,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:21,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:21,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:21,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 469 transitions, 7033 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:21,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:21,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:21,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:22,309 INFO L124 PetriNetUnfolderBase]: 3112/5280 cut-off events. [2024-06-20 17:48:22,309 INFO L125 PetriNetUnfolderBase]: For 598135/598135 co-relation queries the response was YES. [2024-06-20 17:48:22,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44538 conditions, 5280 events. 3112/5280 cut-off events. For 598135/598135 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 35571 event pairs, 626 based on Foata normal form. 1/5279 useless extension candidates. Maximal degree in co-relation 44378. Up to 4713 conditions per place. [2024-06-20 17:48:22,387 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 428 selfloop transitions, 57 changer transitions 0/492 dead transitions. [2024-06-20 17:48:22,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 492 transitions, 8059 flow [2024-06-20 17:48:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:48:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:48:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-20 17:48:22,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-20 17:48:22,388 INFO L175 Difference]: Start difference. First operand has 361 places, 469 transitions, 7033 flow. Second operand 10 states and 221 transitions. [2024-06-20 17:48:22,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 492 transitions, 8059 flow [2024-06-20 17:48:25,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 492 transitions, 7859 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 17:48:25,095 INFO L231 Difference]: Finished difference. Result has 361 places, 469 transitions, 6957 flow [2024-06-20 17:48:25,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6833, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6957, PETRI_PLACES=361, PETRI_TRANSITIONS=469} [2024-06-20 17:48:25,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-20 17:48:25,096 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 469 transitions, 6957 flow [2024-06-20 17:48:25,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:25,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:25,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:25,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:48:25,096 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)] === [2024-06-20 17:48:25,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:25,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1580291131, now seen corresponding path program 1 times [2024-06-20 17:48:25,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:25,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613449012] [2024-06-20 17:48:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:25,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:25,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:25,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613449012] [2024-06-20 17:48:25,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613449012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:25,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:25,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:25,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379704484] [2024-06-20 17:48:25,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:25,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:25,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:25,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:25,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:25,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:25,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 469 transitions, 6957 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:25,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:25,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:25,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:26,492 INFO L124 PetriNetUnfolderBase]: 3132/5316 cut-off events. [2024-06-20 17:48:26,493 INFO L125 PetriNetUnfolderBase]: For 618359/618359 co-relation queries the response was YES. [2024-06-20 17:48:26,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44681 conditions, 5316 events. 3132/5316 cut-off events. For 618359/618359 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35848 event pairs, 555 based on Foata normal form. 6/5320 useless extension candidates. Maximal degree in co-relation 44521. Up to 4527 conditions per place. [2024-06-20 17:48:26,566 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 450 selfloop transitions, 44 changer transitions 0/501 dead transitions. [2024-06-20 17:48:26,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 501 transitions, 8304 flow [2024-06-20 17:48:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:48:26,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:48:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 17:48:26,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-20 17:48:26,567 INFO L175 Difference]: Start difference. First operand has 361 places, 469 transitions, 6957 flow. Second operand 7 states and 169 transitions. [2024-06-20 17:48:26,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 501 transitions, 8304 flow [2024-06-20 17:48:29,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 501 transitions, 8168 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-20 17:48:29,633 INFO L231 Difference]: Finished difference. Result has 359 places, 470 transitions, 6937 flow [2024-06-20 17:48:29,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6823, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6937, PETRI_PLACES=359, PETRI_TRANSITIONS=470} [2024-06-20 17:48:29,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-20 17:48:29,634 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 470 transitions, 6937 flow [2024-06-20 17:48:29,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:29,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:29,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:29,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:48:29,635 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)] === [2024-06-20 17:48:29,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:29,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1314593851, now seen corresponding path program 2 times [2024-06-20 17:48:29,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:29,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069408240] [2024-06-20 17:48:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:29,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:29,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:29,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069408240] [2024-06-20 17:48:29,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069408240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:29,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:29,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:29,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134307572] [2024-06-20 17:48:29,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:29,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:29,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:29,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:29,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:29,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:29,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 470 transitions, 6937 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:29,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:29,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:29,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:30,917 INFO L124 PetriNetUnfolderBase]: 3152/5352 cut-off events. [2024-06-20 17:48:30,917 INFO L125 PetriNetUnfolderBase]: For 619309/619309 co-relation queries the response was YES. [2024-06-20 17:48:30,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44955 conditions, 5352 events. 3152/5352 cut-off events. For 619309/619309 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 36089 event pairs, 633 based on Foata normal form. 6/5356 useless extension candidates. Maximal degree in co-relation 44795. Up to 4728 conditions per place. [2024-06-20 17:48:30,989 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 451 selfloop transitions, 38 changer transitions 0/496 dead transitions. [2024-06-20 17:48:30,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 496 transitions, 8061 flow [2024-06-20 17:48:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:48:30,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:48:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 17:48:30,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-20 17:48:30,990 INFO L175 Difference]: Start difference. First operand has 359 places, 470 transitions, 6937 flow. Second operand 7 states and 166 transitions. [2024-06-20 17:48:30,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 496 transitions, 8061 flow [2024-06-20 17:48:33,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 496 transitions, 7981 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:48:33,897 INFO L231 Difference]: Finished difference. Result has 362 places, 471 transitions, 6963 flow [2024-06-20 17:48:33,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6963, PETRI_PLACES=362, PETRI_TRANSITIONS=471} [2024-06-20 17:48:33,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-20 17:48:33,898 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 471 transitions, 6963 flow [2024-06-20 17:48:33,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:33,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:33,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:33,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:48:33,898 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)] === [2024-06-20 17:48:33,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:33,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1091670663, now seen corresponding path program 4 times [2024-06-20 17:48:33,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:33,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270552664] [2024-06-20 17:48:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:33,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:34,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:34,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270552664] [2024-06-20 17:48:34,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270552664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:34,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:34,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:34,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105330884] [2024-06-20 17:48:34,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:34,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:34,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:34,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:34,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 471 transitions, 6963 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) [2024-06-20 17:48:34,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:34,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:34,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:35,244 INFO L124 PetriNetUnfolderBase]: 3181/5393 cut-off events. [2024-06-20 17:48:35,244 INFO L125 PetriNetUnfolderBase]: For 624759/624759 co-relation queries the response was YES. [2024-06-20 17:48:35,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45497 conditions, 5393 events. 3181/5393 cut-off events. For 624759/624759 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 36400 event pairs, 647 based on Foata normal form. 1/5389 useless extension candidates. Maximal degree in co-relation 45336. Up to 4566 conditions per place. [2024-06-20 17:48:35,321 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 349 selfloop transitions, 165 changer transitions 0/521 dead transitions. [2024-06-20 17:48:35,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 521 transitions, 8766 flow [2024-06-20 17:48:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:48:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:48:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-20 17:48:35,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-20 17:48:35,323 INFO L175 Difference]: Start difference. First operand has 362 places, 471 transitions, 6963 flow. Second operand 10 states and 238 transitions. [2024-06-20 17:48:35,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 521 transitions, 8766 flow [2024-06-20 17:48:38,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 521 transitions, 8678 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:48:38,410 INFO L231 Difference]: Finished difference. Result has 367 places, 483 transitions, 7352 flow [2024-06-20 17:48:38,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6875, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7352, PETRI_PLACES=367, PETRI_TRANSITIONS=483} [2024-06-20 17:48:38,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-20 17:48:38,411 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 483 transitions, 7352 flow [2024-06-20 17:48:38,411 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) [2024-06-20 17:48:38,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:38,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:38,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:48:38,411 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)] === [2024-06-20 17:48:38,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:38,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1805247209, now seen corresponding path program 5 times [2024-06-20 17:48:38,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:38,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699231001] [2024-06-20 17:48:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:38,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:38,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:38,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699231001] [2024-06-20 17:48:38,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699231001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:38,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:38,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:38,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453832892] [2024-06-20 17:48:38,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:38,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:38,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:38,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:38,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:38,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:38,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 483 transitions, 7352 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) [2024-06-20 17:48:38,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:38,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:38,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:39,748 INFO L124 PetriNetUnfolderBase]: 3194/5415 cut-off events. [2024-06-20 17:48:39,748 INFO L125 PetriNetUnfolderBase]: For 642327/642327 co-relation queries the response was YES. [2024-06-20 17:48:39,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46133 conditions, 5415 events. 3194/5415 cut-off events. For 642327/642327 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 36638 event pairs, 647 based on Foata normal form. 1/5411 useless extension candidates. Maximal degree in co-relation 45971. Up to 4581 conditions per place. [2024-06-20 17:48:39,826 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 174 changer transitions 0/525 dead transitions. [2024-06-20 17:48:39,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 525 transitions, 9096 flow [2024-06-20 17:48:39,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:48:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:48:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-20 17:48:39,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 17:48:39,828 INFO L175 Difference]: Start difference. First operand has 367 places, 483 transitions, 7352 flow. Second operand 11 states and 253 transitions. [2024-06-20 17:48:39,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 525 transitions, 9096 flow [2024-06-20 17:48:42,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 525 transitions, 8740 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:48:43,141 INFO L231 Difference]: Finished difference. Result has 371 places, 489 transitions, 7424 flow [2024-06-20 17:48:43,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7008, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7424, PETRI_PLACES=371, PETRI_TRANSITIONS=489} [2024-06-20 17:48:43,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-20 17:48:43,141 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 489 transitions, 7424 flow [2024-06-20 17:48:43,141 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) [2024-06-20 17:48:43,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:43,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:43,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:48:43,142 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)] === [2024-06-20 17:48:43,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:43,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1255514983, now seen corresponding path program 6 times [2024-06-20 17:48:43,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:43,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990091523] [2024-06-20 17:48:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:43,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:43,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:43,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990091523] [2024-06-20 17:48:43,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990091523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:43,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:43,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:43,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561175016] [2024-06-20 17:48:43,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:43,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:43,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:43,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:43,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:43,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:43,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 489 transitions, 7424 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) [2024-06-20 17:48:43,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:43,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:43,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:44,450 INFO L124 PetriNetUnfolderBase]: 3191/5411 cut-off events. [2024-06-20 17:48:44,450 INFO L125 PetriNetUnfolderBase]: For 651003/651003 co-relation queries the response was YES. [2024-06-20 17:48:44,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46162 conditions, 5411 events. 3191/5411 cut-off events. For 651003/651003 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 36582 event pairs, 647 based on Foata normal form. 1/5407 useless extension candidates. Maximal degree in co-relation 45999. Up to 4578 conditions per place. [2024-06-20 17:48:44,528 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 364 selfloop transitions, 152 changer transitions 0/523 dead transitions. [2024-06-20 17:48:44,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 523 transitions, 9092 flow [2024-06-20 17:48:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:48:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:48:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 17:48:44,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:48:44,529 INFO L175 Difference]: Start difference. First operand has 371 places, 489 transitions, 7424 flow. Second operand 9 states and 216 transitions. [2024-06-20 17:48:44,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 523 transitions, 9092 flow [2024-06-20 17:48:47,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 523 transitions, 8784 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:48:47,585 INFO L231 Difference]: Finished difference. Result has 373 places, 489 transitions, 7426 flow [2024-06-20 17:48:47,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7116, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7426, PETRI_PLACES=373, PETRI_TRANSITIONS=489} [2024-06-20 17:48:47,586 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-20 17:48:47,586 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 489 transitions, 7426 flow [2024-06-20 17:48:47,586 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) [2024-06-20 17:48:47,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:47,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:47,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:48:47,586 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)] === [2024-06-20 17:48:47,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1255635139, now seen corresponding path program 4 times [2024-06-20 17:48:47,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:47,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417445633] [2024-06-20 17:48:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:47,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:47,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417445633] [2024-06-20 17:48:47,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417445633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:47,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:47,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:47,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855933412] [2024-06-20 17:48:47,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:47,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:47,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:47,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:47,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:47,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:47,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 489 transitions, 7426 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:47,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:47,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:47,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:49,068 INFO L124 PetriNetUnfolderBase]: 3212/5441 cut-off events. [2024-06-20 17:48:49,068 INFO L125 PetriNetUnfolderBase]: For 674381/674384 co-relation queries the response was YES. [2024-06-20 17:48:49,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46735 conditions, 5441 events. 3212/5441 cut-off events. For 674381/674384 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 36860 event pairs, 688 based on Foata normal form. 1/5429 useless extension candidates. Maximal degree in co-relation 46571. Up to 4427 conditions per place. [2024-06-20 17:48:49,143 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 264 selfloop transitions, 266 changer transitions 0/537 dead transitions. [2024-06-20 17:48:49,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 537 transitions, 9350 flow [2024-06-20 17:48:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:48:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:48:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-20 17:48:49,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-20 17:48:49,144 INFO L175 Difference]: Start difference. First operand has 373 places, 489 transitions, 7426 flow. Second operand 10 states and 245 transitions. [2024-06-20 17:48:49,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 537 transitions, 9350 flow [2024-06-20 17:48:52,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 537 transitions, 9040 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:48:52,582 INFO L231 Difference]: Finished difference. Result has 378 places, 499 transitions, 7939 flow [2024-06-20 17:48:52,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7116, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7939, PETRI_PLACES=378, PETRI_TRANSITIONS=499} [2024-06-20 17:48:52,582 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-20 17:48:52,582 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 499 transitions, 7939 flow [2024-06-20 17:48:52,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:52,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:52,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:52,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:48:52,583 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)] === [2024-06-20 17:48:52,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:52,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1290852483, now seen corresponding path program 7 times [2024-06-20 17:48:52,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:52,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953275395] [2024-06-20 17:48:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:52,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:52,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:52,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953275395] [2024-06-20 17:48:52,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953275395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:52,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:52,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:52,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721119916] [2024-06-20 17:48:52,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:52,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:52,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:52,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:52,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 499 transitions, 7939 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:52,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:52,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:52,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:54,040 INFO L124 PetriNetUnfolderBase]: 3217/5442 cut-off events. [2024-06-20 17:48:54,040 INFO L125 PetriNetUnfolderBase]: For 694104/694107 co-relation queries the response was YES. [2024-06-20 17:48:54,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47894 conditions, 5442 events. 3217/5442 cut-off events. For 694104/694107 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36752 event pairs, 651 based on Foata normal form. 1/5434 useless extension candidates. Maximal degree in co-relation 47728. Up to 4613 conditions per place. [2024-06-20 17:48:54,123 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 362 selfloop transitions, 174 changer transitions 0/543 dead transitions. [2024-06-20 17:48:54,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 543 transitions, 9523 flow [2024-06-20 17:48:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:48:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:48:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-06-20 17:48:54,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764966740576497 [2024-06-20 17:48:54,124 INFO L175 Difference]: Start difference. First operand has 378 places, 499 transitions, 7939 flow. Second operand 11 states and 260 transitions. [2024-06-20 17:48:54,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 543 transitions, 9523 flow [2024-06-20 17:48:58,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 543 transitions, 9063 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 17:48:58,160 INFO L231 Difference]: Finished difference. Result has 383 places, 502 transitions, 7867 flow [2024-06-20 17:48:58,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7479, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7867, PETRI_PLACES=383, PETRI_TRANSITIONS=502} [2024-06-20 17:48:58,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-20 17:48:58,161 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 502 transitions, 7867 flow [2024-06-20 17:48:58,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:58,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:58,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:58,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:48:58,161 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)] === [2024-06-20 17:48:58,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:58,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1379398529, now seen corresponding path program 8 times [2024-06-20 17:48:58,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:58,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359318216] [2024-06-20 17:48:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:58,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:58,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:58,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359318216] [2024-06-20 17:48:58,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359318216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:58,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:58,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:58,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013679976] [2024-06-20 17:48:58,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:58,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:58,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:58,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:58,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:48:58,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 502 transitions, 7867 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:58,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:58,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:48:58,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:59,600 INFO L124 PetriNetUnfolderBase]: 3230/5477 cut-off events. [2024-06-20 17:48:59,600 INFO L125 PetriNetUnfolderBase]: For 707072/707075 co-relation queries the response was YES. [2024-06-20 17:48:59,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47931 conditions, 5477 events. 3230/5477 cut-off events. For 707072/707075 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 37159 event pairs, 660 based on Foata normal form. 1/5470 useless extension candidates. Maximal degree in co-relation 47764. Up to 4628 conditions per place. [2024-06-20 17:48:59,679 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 182 changer transitions 0/549 dead transitions. [2024-06-20 17:48:59,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 549 transitions, 9698 flow [2024-06-20 17:48:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:48:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:48:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 293 transitions. [2024-06-20 17:48:59,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549718574108818 [2024-06-20 17:48:59,680 INFO L175 Difference]: Start difference. First operand has 383 places, 502 transitions, 7867 flow. Second operand 13 states and 293 transitions. [2024-06-20 17:48:59,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 549 transitions, 9698 flow [2024-06-20 17:49:03,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 549 transitions, 9411 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:49:03,761 INFO L231 Difference]: Finished difference. Result has 389 places, 508 transitions, 8027 flow [2024-06-20 17:49:03,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7586, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8027, PETRI_PLACES=389, PETRI_TRANSITIONS=508} [2024-06-20 17:49:03,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-20 17:49:03,761 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 508 transitions, 8027 flow [2024-06-20 17:49:03,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:03,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:03,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:03,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:49:03,761 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)] === [2024-06-20 17:49:03,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1047987163, now seen corresponding path program 5 times [2024-06-20 17:49:03,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:03,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021296857] [2024-06-20 17:49:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:03,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:04,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:04,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021296857] [2024-06-20 17:49:04,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021296857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:04,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:04,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:49:04,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651661439] [2024-06-20 17:49:04,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:04,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:49:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:49:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:49:04,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:49:04,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 508 transitions, 8027 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:04,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:04,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:49:04,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:05,222 INFO L124 PetriNetUnfolderBase]: 3243/5506 cut-off events. [2024-06-20 17:49:05,222 INFO L125 PetriNetUnfolderBase]: For 724235/724238 co-relation queries the response was YES. [2024-06-20 17:49:05,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48386 conditions, 5506 events. 3243/5506 cut-off events. For 724235/724238 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 37396 event pairs, 696 based on Foata normal form. 1/5494 useless extension candidates. Maximal degree in co-relation 48218. Up to 4261 conditions per place. [2024-06-20 17:49:05,300 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 321 changer transitions 0/558 dead transitions. [2024-06-20 17:49:05,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 558 transitions, 10147 flow [2024-06-20 17:49:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:49:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:49:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 285 transitions. [2024-06-20 17:49:05,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-20 17:49:05,301 INFO L175 Difference]: Start difference. First operand has 389 places, 508 transitions, 8027 flow. Second operand 12 states and 285 transitions. [2024-06-20 17:49:05,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 558 transitions, 10147 flow [2024-06-20 17:49:08,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 558 transitions, 9856 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 17:49:08,954 INFO L231 Difference]: Finished difference. Result has 394 places, 517 transitions, 8638 flow [2024-06-20 17:49:08,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7736, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8638, PETRI_PLACES=394, PETRI_TRANSITIONS=517} [2024-06-20 17:49:08,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-20 17:49:08,954 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 517 transitions, 8638 flow [2024-06-20 17:49:08,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:08,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:08,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:08,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:49:08,955 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)] === [2024-06-20 17:49:08,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:08,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1047601213, now seen corresponding path program 6 times [2024-06-20 17:49:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:08,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859528867] [2024-06-20 17:49:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:08,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:09,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:09,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859528867] [2024-06-20 17:49:09,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859528867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:09,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:09,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:49:09,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681122161] [2024-06-20 17:49:09,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:09,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:49:09,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:49:09,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:49:09,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:49:09,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 517 transitions, 8638 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:09,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:09,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:49:09,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:10,376 INFO L124 PetriNetUnfolderBase]: 3240/5478 cut-off events. [2024-06-20 17:49:10,376 INFO L125 PetriNetUnfolderBase]: For 742716/742719 co-relation queries the response was YES. [2024-06-20 17:49:10,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49436 conditions, 5478 events. 3240/5478 cut-off events. For 742716/742719 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 37127 event pairs, 676 based on Foata normal form. 1/5466 useless extension candidates. Maximal degree in co-relation 49266. Up to 4259 conditions per place. [2024-06-20 17:49:10,458 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 324 changer transitions 0/558 dead transitions. [2024-06-20 17:49:10,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 558 transitions, 10422 flow [2024-06-20 17:49:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:49:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:49:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 299 transitions. [2024-06-20 17:49:10,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 17:49:10,459 INFO L175 Difference]: Start difference. First operand has 394 places, 517 transitions, 8638 flow. Second operand 13 states and 299 transitions. [2024-06-20 17:49:10,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 558 transitions, 10422 flow [2024-06-20 17:49:14,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 558 transitions, 9830 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-20 17:49:14,673 INFO L231 Difference]: Finished difference. Result has 400 places, 517 transitions, 8700 flow [2024-06-20 17:49:14,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8046, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8700, PETRI_PLACES=400, PETRI_TRANSITIONS=517} [2024-06-20 17:49:14,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-20 17:49:14,674 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 517 transitions, 8700 flow [2024-06-20 17:49:14,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:14,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:14,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:14,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:49:14,674 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)] === [2024-06-20 17:49:14,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:14,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1047987349, now seen corresponding path program 9 times [2024-06-20 17:49:14,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:14,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395133882] [2024-06-20 17:49:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:14,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:14,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:14,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395133882] [2024-06-20 17:49:14,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395133882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:14,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:14,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:49:14,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495146767] [2024-06-20 17:49:14,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:14,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:49:14,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:49:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:49:15,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:49:15,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 517 transitions, 8700 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:15,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:15,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:49:15,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:16,191 INFO L124 PetriNetUnfolderBase]: 3237/5491 cut-off events. [2024-06-20 17:49:16,191 INFO L125 PetriNetUnfolderBase]: For 750205/750208 co-relation queries the response was YES. [2024-06-20 17:49:16,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49528 conditions, 5491 events. 3237/5491 cut-off events. For 750205/750208 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 37230 event pairs, 660 based on Foata normal form. 1/5484 useless extension candidates. Maximal degree in co-relation 49357. Up to 4639 conditions per place. [2024-06-20 17:49:16,274 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 370 selfloop transitions, 182 changer transitions 0/559 dead transitions. [2024-06-20 17:49:16,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 559 transitions, 10298 flow [2024-06-20 17:49:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 17:49:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 17:49:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 328 transitions. [2024-06-20 17:49:16,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-20 17:49:16,276 INFO L175 Difference]: Start difference. First operand has 400 places, 517 transitions, 8700 flow. Second operand 15 states and 328 transitions. [2024-06-20 17:49:16,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 559 transitions, 10298 flow [2024-06-20 17:49:21,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 559 transitions, 9636 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 17:49:21,034 INFO L231 Difference]: Finished difference. Result has 403 places, 517 transitions, 8408 flow [2024-06-20 17:49:21,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8038, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8408, PETRI_PLACES=403, PETRI_TRANSITIONS=517} [2024-06-20 17:49:21,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-20 17:49:21,034 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 517 transitions, 8408 flow [2024-06-20 17:49:21,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:21,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:21,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:21,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:49:21,035 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)] === [2024-06-20 17:49:21,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:21,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1899966113, now seen corresponding path program 7 times [2024-06-20 17:49:21,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:21,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392862950] [2024-06-20 17:49:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:21,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:21,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:21,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392862950] [2024-06-20 17:49:21,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392862950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:21,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:21,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:49:21,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199557511] [2024-06-20 17:49:21,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:21,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:49:21,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:49:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:49:21,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:49:21,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 517 transitions, 8408 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:21,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:21,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:49:21,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:22,465 INFO L124 PetriNetUnfolderBase]: 3266/5546 cut-off events. [2024-06-20 17:49:22,465 INFO L125 PetriNetUnfolderBase]: For 777405/777408 co-relation queries the response was YES. [2024-06-20 17:49:22,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50000 conditions, 5546 events. 3266/5546 cut-off events. For 777405/777408 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 37799 event pairs, 696 based on Foata normal form. 1/5534 useless extension candidates. Maximal degree in co-relation 49828. Up to 4282 conditions per place. [2024-06-20 17:49:22,554 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 336 changer transitions 0/562 dead transitions. [2024-06-20 17:49:22,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 562 transitions, 10386 flow [2024-06-20 17:49:22,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:49:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:49:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 297 transitions. [2024-06-20 17:49:22,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572232645403377 [2024-06-20 17:49:22,555 INFO L175 Difference]: Start difference. First operand has 403 places, 517 transitions, 8408 flow. Second operand 13 states and 297 transitions. [2024-06-20 17:49:22,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 562 transitions, 10386 flow [2024-06-20 17:49:26,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 562 transitions, 10022 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-20 17:49:26,942 INFO L231 Difference]: Finished difference. Result has 403 places, 527 transitions, 8912 flow [2024-06-20 17:49:26,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8044, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8912, PETRI_PLACES=403, PETRI_TRANSITIONS=527} [2024-06-20 17:49:26,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-20 17:49:26,943 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 527 transitions, 8912 flow [2024-06-20 17:49:26,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:26,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:26,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:26,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:49:26,943 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)] === [2024-06-20 17:49:26,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:26,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1753554999, now seen corresponding path program 8 times [2024-06-20 17:49:26,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:26,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016568614] [2024-06-20 17:49:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:26,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:27,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:27,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016568614] [2024-06-20 17:49:27,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016568614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:27,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:27,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:49:27,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049470678] [2024-06-20 17:49:27,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:27,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:49:27,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:49:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:49:27,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:49:27,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 527 transitions, 8912 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:27,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:27,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:49:27,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:28,549 INFO L124 PetriNetUnfolderBase]: 3271/5547 cut-off events. [2024-06-20 17:49:28,549 INFO L125 PetriNetUnfolderBase]: For 795459/795462 co-relation queries the response was YES. [2024-06-20 17:49:28,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50595 conditions, 5547 events. 3271/5547 cut-off events. For 795459/795462 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 37758 event pairs, 688 based on Foata normal form. 1/5535 useless extension candidates. Maximal degree in co-relation 50422. Up to 4286 conditions per place. [2024-06-20 17:49:28,625 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 330 changer transitions 0/565 dead transitions. [2024-06-20 17:49:28,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 565 transitions, 10973 flow [2024-06-20 17:49:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:49:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:49:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 281 transitions. [2024-06-20 17:49:28,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5711382113821138 [2024-06-20 17:49:28,626 INFO L175 Difference]: Start difference. First operand has 403 places, 527 transitions, 8912 flow. Second operand 12 states and 281 transitions. [2024-06-20 17:49:28,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 565 transitions, 10973 flow [2024-06-20 17:49:33,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 565 transitions, 10320 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-20 17:49:33,654 INFO L231 Difference]: Finished difference. Result has 406 places, 530 transitions, 8986 flow [2024-06-20 17:49:33,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8276, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8986, PETRI_PLACES=406, PETRI_TRANSITIONS=530} [2024-06-20 17:49:33,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-20 17:49:33,655 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 530 transitions, 8986 flow [2024-06-20 17:49:33,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:33,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:33,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:33,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:49:33,655 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)] === [2024-06-20 17:49:33,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:33,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1649506053, now seen corresponding path program 10 times [2024-06-20 17:49:33,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:33,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737834055] [2024-06-20 17:49:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:33,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:33,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:33,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737834055] [2024-06-20 17:49:33,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737834055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:33,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:33,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:49:33,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250075400] [2024-06-20 17:49:33,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:33,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:49:33,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:33,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:49:33,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:49:33,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:49:33,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 530 transitions, 8986 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:33,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:33,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:49:33,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:35,151 INFO L124 PetriNetUnfolderBase]: 3284/5564 cut-off events. [2024-06-20 17:49:35,151 INFO L125 PetriNetUnfolderBase]: For 817345/817348 co-relation queries the response was YES. [2024-06-20 17:49:35,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50916 conditions, 5564 events. 3284/5564 cut-off events. For 817345/817348 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 37814 event pairs, 650 based on Foata normal form. 1/5559 useless extension candidates. Maximal degree in co-relation 50742. Up to 4701 conditions per place. [2024-06-20 17:49:35,238 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 379 selfloop transitions, 188 changer transitions 0/574 dead transitions. [2024-06-20 17:49:35,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 574 transitions, 11111 flow [2024-06-20 17:49:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 17:49:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 17:49:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 326 transitions. [2024-06-20 17:49:35,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300813008130081 [2024-06-20 17:49:35,240 INFO L175 Difference]: Start difference. First operand has 406 places, 530 transitions, 8986 flow. Second operand 15 states and 326 transitions. [2024-06-20 17:49:35,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 574 transitions, 11111 flow [2024-06-20 17:49:40,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 574 transitions, 10488 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 17:49:40,570 INFO L231 Difference]: Finished difference. Result has 414 places, 536 transitions, 8838 flow [2024-06-20 17:49:40,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8371, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8838, PETRI_PLACES=414, PETRI_TRANSITIONS=536} [2024-06-20 17:49:40,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-20 17:49:40,571 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 536 transitions, 8838 flow [2024-06-20 17:49:40,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:40,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:40,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:40,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:49:40,572 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)] === [2024-06-20 17:49:40,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1671678827, now seen corresponding path program 11 times [2024-06-20 17:49:40,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:40,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190440639] [2024-06-20 17:49:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:40,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:40,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:40,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190440639] [2024-06-20 17:49:40,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190440639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:40,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:40,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:49:40,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181609038] [2024-06-20 17:49:40,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:40,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:49:40,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:49:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:49:40,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:49:40,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 536 transitions, 8838 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:40,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:40,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:49:40,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:42,091 INFO L124 PetriNetUnfolderBase]: 3281/5580 cut-off events. [2024-06-20 17:49:42,091 INFO L125 PetriNetUnfolderBase]: For 822168/822171 co-relation queries the response was YES. [2024-06-20 17:49:42,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50617 conditions, 5580 events. 3281/5580 cut-off events. For 822168/822171 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38052 event pairs, 668 based on Foata normal form. 1/5575 useless extension candidates. Maximal degree in co-relation 50442. Up to 4698 conditions per place. [2024-06-20 17:49:42,174 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 380 selfloop transitions, 188 changer transitions 0/575 dead transitions. [2024-06-20 17:49:42,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 575 transitions, 10678 flow [2024-06-20 17:49:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-20 17:49:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-20 17:49:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 361 transitions. [2024-06-20 17:49:42,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5179340028694405 [2024-06-20 17:49:42,175 INFO L175 Difference]: Start difference. First operand has 414 places, 536 transitions, 8838 flow. Second operand 17 states and 361 transitions. [2024-06-20 17:49:42,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 575 transitions, 10678 flow [2024-06-20 17:49:47,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 575 transitions, 10293 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-20 17:49:47,353 INFO L231 Difference]: Finished difference. Result has 421 places, 536 transitions, 8835 flow [2024-06-20 17:49:47,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8453, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8835, PETRI_PLACES=421, PETRI_TRANSITIONS=536} [2024-06-20 17:49:47,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-20 17:49:47,353 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 536 transitions, 8835 flow [2024-06-20 17:49:47,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:47,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:47,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:47,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:49:47,354 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)] === [2024-06-20 17:49:47,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1672064963, now seen corresponding path program 9 times [2024-06-20 17:49:47,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:47,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239680633] [2024-06-20 17:49:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:47,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:47,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:47,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239680633] [2024-06-20 17:49:47,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239680633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:47,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:47,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:49:47,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331283160] [2024-06-20 17:49:47,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:47,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:49:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:47,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:49:47,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:49:47,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:49:47,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 536 transitions, 8835 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:47,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:47,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:49:47,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:48,863 INFO L124 PetriNetUnfolderBase]: 3278/5569 cut-off events. [2024-06-20 17:49:48,863 INFO L125 PetriNetUnfolderBase]: For 832413/832416 co-relation queries the response was YES. [2024-06-20 17:49:48,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50489 conditions, 5569 events. 3278/5569 cut-off events. For 832413/832416 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 37968 event pairs, 697 based on Foata normal form. 1/5557 useless extension candidates. Maximal degree in co-relation 50314. Up to 4292 conditions per place. [2024-06-20 17:49:48,949 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 336 changer transitions 0/571 dead transitions. [2024-06-20 17:49:48,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 571 transitions, 10665 flow [2024-06-20 17:49:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:49:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:49:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 297 transitions. [2024-06-20 17:49:48,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572232645403377 [2024-06-20 17:49:48,950 INFO L175 Difference]: Start difference. First operand has 421 places, 536 transitions, 8835 flow. Second operand 13 states and 297 transitions. [2024-06-20 17:49:48,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 571 transitions, 10665 flow [2024-06-20 17:49:53,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 571 transitions, 10257 flow, removed 12 selfloop flow, removed 16 redundant places. [2024-06-20 17:49:53,892 INFO L231 Difference]: Finished difference. Result has 418 places, 536 transitions, 9105 flow [2024-06-20 17:49:53,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8427, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9105, PETRI_PLACES=418, PETRI_TRANSITIONS=536} [2024-06-20 17:49:53,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-20 17:49:53,892 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 536 transitions, 9105 flow [2024-06-20 17:49:53,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:53,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:53,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:53,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:49:53,893 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)] === [2024-06-20 17:49:53,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:53,893 INFO L85 PathProgramCache]: Analyzing trace with hash -59803653, now seen corresponding path program 1 times [2024-06-20 17:49:53,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:53,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574921737] [2024-06-20 17:49:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:53,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:54,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:54,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574921737] [2024-06-20 17:49:54,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574921737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:54,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:54,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:49:54,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286081147] [2024-06-20 17:49:54,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:54,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:49:54,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:54,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:49:54,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:49:54,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:49:54,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 536 transitions, 9105 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:54,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:54,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:49:54,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:55,465 INFO L124 PetriNetUnfolderBase]: 3286/5554 cut-off events. [2024-06-20 17:49:55,466 INFO L125 PetriNetUnfolderBase]: For 858138/858141 co-relation queries the response was YES. [2024-06-20 17:49:55,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51016 conditions, 5554 events. 3286/5554 cut-off events. For 858138/858141 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 37646 event pairs, 642 based on Foata normal form. 2/5548 useless extension candidates. Maximal degree in co-relation 50841. Up to 4905 conditions per place. [2024-06-20 17:49:55,544 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 479 selfloop transitions, 73 changer transitions 0/560 dead transitions. [2024-06-20 17:49:55,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 560 transitions, 10289 flow [2024-06-20 17:49:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:49:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:49:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 17:49:55,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-20 17:49:55,545 INFO L175 Difference]: Start difference. First operand has 418 places, 536 transitions, 9105 flow. Second operand 8 states and 190 transitions. [2024-06-20 17:49:55,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 560 transitions, 10289 flow [2024-06-20 17:50:00,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 560 transitions, 9660 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 17:50:00,487 INFO L231 Difference]: Finished difference. Result has 416 places, 538 transitions, 8657 flow [2024-06-20 17:50:00,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8476, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8657, PETRI_PLACES=416, PETRI_TRANSITIONS=538} [2024-06-20 17:50:00,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-20 17:50:00,487 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 538 transitions, 8657 flow [2024-06-20 17:50:00,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:00,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:00,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:00,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:50:00,488 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)] === [2024-06-20 17:50:00,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1047587325, now seen corresponding path program 1 times [2024-06-20 17:50:00,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:00,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341637391] [2024-06-20 17:50:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:00,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:00,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:00,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341637391] [2024-06-20 17:50:00,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341637391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:00,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:00,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:50:00,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174343585] [2024-06-20 17:50:00,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:00,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:50:00,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:00,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:50:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:50:00,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:50:00,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 538 transitions, 8657 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:00,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:00,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:50:00,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:01,881 INFO L124 PetriNetUnfolderBase]: 3294/5567 cut-off events. [2024-06-20 17:50:01,881 INFO L125 PetriNetUnfolderBase]: For 871053/871056 co-relation queries the response was YES. [2024-06-20 17:50:01,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50649 conditions, 5567 events. 3294/5567 cut-off events. For 871053/871056 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37773 event pairs, 674 based on Foata normal form. 2/5556 useless extension candidates. Maximal degree in co-relation 50473. Up to 4759 conditions per place. [2024-06-20 17:50:01,967 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 372 selfloop transitions, 182 changer transitions 0/562 dead transitions. [2024-06-20 17:50:01,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 562 transitions, 9871 flow [2024-06-20 17:50:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:50:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:50:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 17:50:01,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 17:50:01,968 INFO L175 Difference]: Start difference. First operand has 416 places, 538 transitions, 8657 flow. Second operand 8 states and 193 transitions. [2024-06-20 17:50:01,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 562 transitions, 9871 flow [2024-06-20 17:50:07,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 562 transitions, 9712 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:50:07,871 INFO L231 Difference]: Finished difference. Result has 418 places, 540 transitions, 8923 flow [2024-06-20 17:50:07,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8498, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8923, PETRI_PLACES=418, PETRI_TRANSITIONS=540} [2024-06-20 17:50:07,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-20 17:50:07,871 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 540 transitions, 8923 flow [2024-06-20 17:50:07,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:07,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:07,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:07,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:50:07,872 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)] === [2024-06-20 17:50:07,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1386872089, now seen corresponding path program 2 times [2024-06-20 17:50:07,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:07,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659899171] [2024-06-20 17:50:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:07,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:08,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:08,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659899171] [2024-06-20 17:50:08,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659899171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:08,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:08,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:50:08,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544626377] [2024-06-20 17:50:08,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:08,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:50:08,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:50:08,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:50:08,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:50:08,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 540 transitions, 8923 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:08,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:08,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:50:08,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:09,387 INFO L124 PetriNetUnfolderBase]: 3302/5588 cut-off events. [2024-06-20 17:50:09,387 INFO L125 PetriNetUnfolderBase]: For 888042/888045 co-relation queries the response was YES. [2024-06-20 17:50:09,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51196 conditions, 5588 events. 3302/5588 cut-off events. For 888042/888045 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 37995 event pairs, 646 based on Foata normal form. 2/5584 useless extension candidates. Maximal degree in co-relation 51019. Up to 4929 conditions per place. [2024-06-20 17:50:09,474 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 481 selfloop transitions, 73 changer transitions 0/562 dead transitions. [2024-06-20 17:50:09,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 562 transitions, 10109 flow [2024-06-20 17:50:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:50:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:50:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-20 17:50:09,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 17:50:09,475 INFO L175 Difference]: Start difference. First operand has 418 places, 540 transitions, 8923 flow. Second operand 9 states and 207 transitions. [2024-06-20 17:50:09,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 562 transitions, 10109 flow [2024-06-20 17:50:14,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 562 transitions, 9700 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 17:50:14,842 INFO L231 Difference]: Finished difference. Result has 421 places, 542 transitions, 8699 flow [2024-06-20 17:50:14,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8514, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8699, PETRI_PLACES=421, PETRI_TRANSITIONS=542} [2024-06-20 17:50:14,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-20 17:50:14,843 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 542 transitions, 8699 flow [2024-06-20 17:50:14,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:14,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:14,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:14,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:50:14,843 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)] === [2024-06-20 17:50:14,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:14,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1981855987, now seen corresponding path program 2 times [2024-06-20 17:50:14,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:14,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597791230] [2024-06-20 17:50:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:14,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:15,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:15,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597791230] [2024-06-20 17:50:15,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597791230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:15,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:15,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:50:15,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966236083] [2024-06-20 17:50:15,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:15,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:50:15,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:15,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:50:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:50:15,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:50:15,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 542 transitions, 8699 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:15,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:15,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:50:15,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:16,404 INFO L124 PetriNetUnfolderBase]: 3310/5617 cut-off events. [2024-06-20 17:50:16,404 INFO L125 PetriNetUnfolderBase]: For 900831/900834 co-relation queries the response was YES. [2024-06-20 17:50:16,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51154 conditions, 5617 events. 3310/5617 cut-off events. For 900831/900834 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 38352 event pairs, 696 based on Foata normal form. 2/5606 useless extension candidates. Maximal degree in co-relation 50976. Up to 4783 conditions per place. [2024-06-20 17:50:16,488 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 182 changer transitions 0/563 dead transitions. [2024-06-20 17:50:16,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 563 transitions, 9911 flow [2024-06-20 17:50:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:50:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:50:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 17:50:16,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:50:16,489 INFO L175 Difference]: Start difference. First operand has 421 places, 542 transitions, 8699 flow. Second operand 8 states and 192 transitions. [2024-06-20 17:50:16,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 563 transitions, 9911 flow [2024-06-20 17:50:22,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 563 transitions, 9777 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 17:50:22,418 INFO L231 Difference]: Finished difference. Result has 423 places, 544 transitions, 8994 flow [2024-06-20 17:50:22,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8565, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8994, PETRI_PLACES=423, PETRI_TRANSITIONS=544} [2024-06-20 17:50:22,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-20 17:50:22,418 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 544 transitions, 8994 flow [2024-06-20 17:50:22,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:22,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:22,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:22,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:50:22,419 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)] === [2024-06-20 17:50:22,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1753954837, now seen corresponding path program 3 times [2024-06-20 17:50:22,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:22,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635616751] [2024-06-20 17:50:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:22,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:22,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:22,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635616751] [2024-06-20 17:50:22,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635616751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:22,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:22,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:50:22,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651910501] [2024-06-20 17:50:22,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:22,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:50:22,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:22,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:50:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:50:22,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:50:22,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 544 transitions, 8994 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:22,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:22,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:50:22,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:24,019 INFO L124 PetriNetUnfolderBase]: 3318/5605 cut-off events. [2024-06-20 17:50:24,019 INFO L125 PetriNetUnfolderBase]: For 921436/921439 co-relation queries the response was YES. [2024-06-20 17:50:24,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51739 conditions, 5605 events. 3318/5605 cut-off events. For 921436/921439 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 38052 event pairs, 678 based on Foata normal form. 2/5594 useless extension candidates. Maximal degree in co-relation 51559. Up to 4795 conditions per place. [2024-06-20 17:50:24,094 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 180 changer transitions 0/565 dead transitions. [2024-06-20 17:50:24,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 565 transitions, 10214 flow [2024-06-20 17:50:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:50:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:50:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 17:50:24,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:50:24,095 INFO L175 Difference]: Start difference. First operand has 423 places, 544 transitions, 8994 flow. Second operand 8 states and 192 transitions. [2024-06-20 17:50:24,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 565 transitions, 10214 flow [2024-06-20 17:50:29,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 565 transitions, 9801 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 17:50:29,746 INFO L231 Difference]: Finished difference. Result has 425 places, 546 transitions, 9010 flow [2024-06-20 17:50:29,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8581, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9010, PETRI_PLACES=425, PETRI_TRANSITIONS=546} [2024-06-20 17:50:29,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-20 17:50:29,747 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 546 transitions, 9010 flow [2024-06-20 17:50:29,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:29,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:29,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:29,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:50:29,747 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)] === [2024-06-20 17:50:29,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1990426867, now seen corresponding path program 4 times [2024-06-20 17:50:29,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:29,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61577366] [2024-06-20 17:50:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:29,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61577366] [2024-06-20 17:50:29,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61577366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:29,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:29,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:50:29,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206869331] [2024-06-20 17:50:29,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:29,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:50:29,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:50:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:50:30,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:50:30,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 546 transitions, 9010 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:30,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:30,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:50:30,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:31,180 INFO L124 PetriNetUnfolderBase]: 3385/5716 cut-off events. [2024-06-20 17:50:31,180 INFO L125 PetriNetUnfolderBase]: For 998940/998943 co-relation queries the response was YES. [2024-06-20 17:50:31,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53875 conditions, 5716 events. 3385/5716 cut-off events. For 998940/998943 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38944 event pairs, 697 based on Foata normal form. 2/5705 useless extension candidates. Maximal degree in co-relation 53694. Up to 4811 conditions per place. [2024-06-20 17:50:31,270 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 190 changer transitions 0/575 dead transitions. [2024-06-20 17:50:31,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 575 transitions, 10591 flow [2024-06-20 17:50:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:50:31,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:50:31,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 17:50:31,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 17:50:31,271 INFO L175 Difference]: Start difference. First operand has 425 places, 546 transitions, 9010 flow. Second operand 8 states and 197 transitions. [2024-06-20 17:50:31,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 575 transitions, 10591 flow [2024-06-20 17:50:37,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 575 transitions, 10178 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 17:50:37,128 INFO L231 Difference]: Finished difference. Result has 428 places, 551 transitions, 9144 flow [2024-06-20 17:50:37,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8597, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9144, PETRI_PLACES=428, PETRI_TRANSITIONS=551} [2024-06-20 17:50:37,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-20 17:50:37,129 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 551 transitions, 9144 flow [2024-06-20 17:50:37,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:37,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:37,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:37,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:50:37,130 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)] === [2024-06-20 17:50:37,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash -6052059, now seen corresponding path program 10 times [2024-06-20 17:50:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:37,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658240016] [2024-06-20 17:50:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:37,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:37,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:37,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658240016] [2024-06-20 17:50:37,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658240016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:37,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:37,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:50:37,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421672492] [2024-06-20 17:50:37,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:37,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:50:37,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:50:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:50:37,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:50:37,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 551 transitions, 9144 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:37,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:37,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:50:37,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:38,761 INFO L124 PetriNetUnfolderBase]: 3411/5783 cut-off events. [2024-06-20 17:50:38,761 INFO L125 PetriNetUnfolderBase]: For 1027959/1027959 co-relation queries the response was YES. [2024-06-20 17:50:38,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54663 conditions, 5783 events. 3411/5783 cut-off events. For 1027959/1027959 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 39606 event pairs, 676 based on Foata normal form. 2/5780 useless extension candidates. Maximal degree in co-relation 54479. Up to 4599 conditions per place. [2024-06-20 17:50:38,847 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 269 changer transitions 0/588 dead transitions. [2024-06-20 17:50:38,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 588 transitions, 10958 flow [2024-06-20 17:50:38,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:50:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:50:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 17:50:38,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:50:38,848 INFO L175 Difference]: Start difference. First operand has 428 places, 551 transitions, 9144 flow. Second operand 9 states and 216 transitions. [2024-06-20 17:50:38,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 588 transitions, 10958 flow [2024-06-20 17:50:45,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 588 transitions, 10661 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 17:50:45,986 INFO L231 Difference]: Finished difference. Result has 434 places, 561 transitions, 9656 flow [2024-06-20 17:50:45,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8847, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9656, PETRI_PLACES=434, PETRI_TRANSITIONS=561} [2024-06-20 17:50:45,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-20 17:50:45,987 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 561 transitions, 9656 flow [2024-06-20 17:50:45,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:45,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:45,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:45,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:50:45,988 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)] === [2024-06-20 17:50:45,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:45,988 INFO L85 PathProgramCache]: Analyzing trace with hash 547036011, now seen corresponding path program 12 times [2024-06-20 17:50:45,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:45,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110555518] [2024-06-20 17:50:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:45,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:46,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:46,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110555518] [2024-06-20 17:50:46,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110555518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:46,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:46,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:50:46,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880087264] [2024-06-20 17:50:46,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:46,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:50:46,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:46,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:50:46,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:50:46,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:50:46,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 561 transitions, 9656 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:46,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:46,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:50:46,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:47,800 INFO L124 PetriNetUnfolderBase]: 3416/5752 cut-off events. [2024-06-20 17:50:47,800 INFO L125 PetriNetUnfolderBase]: For 1043300/1043300 co-relation queries the response was YES. [2024-06-20 17:50:47,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55401 conditions, 5752 events. 3416/5752 cut-off events. For 1043300/1043300 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39091 event pairs, 640 based on Foata normal form. 1/5748 useless extension candidates. Maximal degree in co-relation 55214. Up to 4897 conditions per place. [2024-06-20 17:50:47,882 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 415 selfloop transitions, 176 changer transitions 0/598 dead transitions. [2024-06-20 17:50:47,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 598 transitions, 11409 flow [2024-06-20 17:50:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:50:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:50:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-20 17:50:47,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 17:50:47,883 INFO L175 Difference]: Start difference. First operand has 434 places, 561 transitions, 9656 flow. Second operand 10 states and 235 transitions. [2024-06-20 17:50:47,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 598 transitions, 11409 flow [2024-06-20 17:50:53,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 598 transitions, 10849 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 17:50:53,636 INFO L231 Difference]: Finished difference. Result has 437 places, 564 transitions, 9497 flow [2024-06-20 17:50:53,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9098, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9497, PETRI_PLACES=437, PETRI_TRANSITIONS=564} [2024-06-20 17:50:53,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-20 17:50:53,637 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 564 transitions, 9497 flow [2024-06-20 17:50:53,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:53,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:53,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:53,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:50:53,638 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)] === [2024-06-20 17:50:53,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash 871788477, now seen corresponding path program 11 times [2024-06-20 17:50:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:53,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641539426] [2024-06-20 17:50:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:53,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:53,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:53,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641539426] [2024-06-20 17:50:53,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641539426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:53,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:53,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:50:53,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587432381] [2024-06-20 17:50:53,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:53,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:50:53,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:50:53,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:50:53,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:50:53,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 564 transitions, 9497 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:53,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:53,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:50:53,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:55,283 INFO L124 PetriNetUnfolderBase]: 3426/5794 cut-off events. [2024-06-20 17:50:55,283 INFO L125 PetriNetUnfolderBase]: For 1062486/1062486 co-relation queries the response was YES. [2024-06-20 17:50:55,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55302 conditions, 5794 events. 3426/5794 cut-off events. For 1062486/1062486 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 39696 event pairs, 662 based on Foata normal form. 2/5791 useless extension candidates. Maximal degree in co-relation 55115. Up to 4495 conditions per place. [2024-06-20 17:50:55,372 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 276 selfloop transitions, 323 changer transitions 0/606 dead transitions. [2024-06-20 17:50:55,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 606 transitions, 11519 flow [2024-06-20 17:50:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:50:55,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:50:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 300 transitions. [2024-06-20 17:50:55,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5628517823639775 [2024-06-20 17:50:55,373 INFO L175 Difference]: Start difference. First operand has 437 places, 564 transitions, 9497 flow. Second operand 13 states and 300 transitions. [2024-06-20 17:50:55,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 606 transitions, 11519 flow [2024-06-20 17:51:01,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 606 transitions, 11259 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:51:01,921 INFO L231 Difference]: Finished difference. Result has 443 places, 568 transitions, 9950 flow [2024-06-20 17:51:01,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9237, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9950, PETRI_PLACES=443, PETRI_TRANSITIONS=568} [2024-06-20 17:51:01,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-20 17:51:01,921 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 568 transitions, 9950 flow [2024-06-20 17:51:01,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:01,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:01,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:01,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 17:51:01,921 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)] === [2024-06-20 17:51:01,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:01,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1732139241, now seen corresponding path program 13 times [2024-06-20 17:51:01,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:01,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839290125] [2024-06-20 17:51:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:01,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:51:02,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:02,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839290125] [2024-06-20 17:51:02,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839290125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:02,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:02,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:51:02,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896329734] [2024-06-20 17:51:02,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:02,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:51:02,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:51:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:51:02,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:51:02,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 568 transitions, 9950 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:02,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:02,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:51:02,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:03,670 INFO L124 PetriNetUnfolderBase]: 3423/5778 cut-off events. [2024-06-20 17:51:03,670 INFO L125 PetriNetUnfolderBase]: For 1072407/1072407 co-relation queries the response was YES. [2024-06-20 17:51:03,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55744 conditions, 5778 events. 3423/5778 cut-off events. For 1072407/1072407 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 39415 event pairs, 650 based on Foata normal form. 1/5774 useless extension candidates. Maximal degree in co-relation 55556. Up to 4908 conditions per place. [2024-06-20 17:51:03,754 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 192 changer transitions 0/603 dead transitions. [2024-06-20 17:51:03,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 603 transitions, 11454 flow [2024-06-20 17:51:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:51:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:51:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-20 17:51:03,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467479674796748 [2024-06-20 17:51:03,756 INFO L175 Difference]: Start difference. First operand has 443 places, 568 transitions, 9950 flow. Second operand 12 states and 269 transitions. [2024-06-20 17:51:03,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 603 transitions, 11454 flow [2024-06-20 17:51:10,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 603 transitions, 10779 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 17:51:10,281 INFO L231 Difference]: Finished difference. Result has 445 places, 568 transitions, 9665 flow [2024-06-20 17:51:10,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9275, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9665, PETRI_PLACES=445, PETRI_TRANSITIONS=568} [2024-06-20 17:51:10,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-20 17:51:10,282 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 568 transitions, 9665 flow [2024-06-20 17:51:10,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:10,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:10,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:10,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 17:51:10,283 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)] === [2024-06-20 17:51:10,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1150937097, now seen corresponding path program 12 times [2024-06-20 17:51:10,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:10,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269080161] [2024-06-20 17:51:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:10,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:51:10,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:10,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269080161] [2024-06-20 17:51:10,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269080161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:10,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:10,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:51:10,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37205803] [2024-06-20 17:51:10,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:10,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:51:10,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:51:10,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:51:10,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:51:10,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 568 transitions, 9665 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:10,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:10,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:51:10,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:11,908 INFO L124 PetriNetUnfolderBase]: 3417/5782 cut-off events. [2024-06-20 17:51:11,909 INFO L125 PetriNetUnfolderBase]: For 1079488/1079488 co-relation queries the response was YES. [2024-06-20 17:51:11,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55297 conditions, 5782 events. 3417/5782 cut-off events. For 1079488/1079488 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 39553 event pairs, 662 based on Foata normal form. 2/5779 useless extension candidates. Maximal degree in co-relation 55108. Up to 4488 conditions per place. [2024-06-20 17:51:12,002 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 276 selfloop transitions, 321 changer transitions 0/604 dead transitions. [2024-06-20 17:51:12,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 604 transitions, 11403 flow [2024-06-20 17:51:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:51:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:51:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 283 transitions. [2024-06-20 17:51:12,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5752032520325203 [2024-06-20 17:51:12,004 INFO L175 Difference]: Start difference. First operand has 445 places, 568 transitions, 9665 flow. Second operand 12 states and 283 transitions. [2024-06-20 17:51:12,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 604 transitions, 11403 flow [2024-06-20 17:51:18,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 604 transitions, 11004 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 17:51:18,600 INFO L231 Difference]: Finished difference. Result has 448 places, 568 transitions, 9915 flow [2024-06-20 17:51:18,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9266, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9915, PETRI_PLACES=448, PETRI_TRANSITIONS=568} [2024-06-20 17:51:18,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-20 17:51:18,601 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 568 transitions, 9915 flow [2024-06-20 17:51:18,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:18,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:18,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:18,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 17:51:18,602 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)] === [2024-06-20 17:51:18,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1151144301, now seen corresponding path program 14 times [2024-06-20 17:51:18,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:18,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822943305] [2024-06-20 17:51:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:18,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:51:18,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:18,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822943305] [2024-06-20 17:51:18,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822943305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:18,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:18,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:51:18,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082780435] [2024-06-20 17:51:18,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:18,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:51:18,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:18,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:51:18,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:51:19,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:51:19,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 568 transitions, 9915 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:19,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:19,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:51:19,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:20,404 INFO L124 PetriNetUnfolderBase]: 3414/5790 cut-off events. [2024-06-20 17:51:20,405 INFO L125 PetriNetUnfolderBase]: For 1085797/1085797 co-relation queries the response was YES. [2024-06-20 17:51:20,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55524 conditions, 5790 events. 3414/5790 cut-off events. For 1085797/1085797 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 39694 event pairs, 670 based on Foata normal form. 1/5786 useless extension candidates. Maximal degree in co-relation 55335. Up to 4897 conditions per place. [2024-06-20 17:51:20,501 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 421 selfloop transitions, 177 changer transitions 0/605 dead transitions. [2024-06-20 17:51:20,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 605 transitions, 11661 flow [2024-06-20 17:51:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:51:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:51:20,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 290 transitions. [2024-06-20 17:51:20,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440900562851783 [2024-06-20 17:51:20,502 INFO L175 Difference]: Start difference. First operand has 448 places, 568 transitions, 9915 flow. Second operand 13 states and 290 transitions. [2024-06-20 17:51:20,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 605 transitions, 11661 flow [2024-06-20 17:51:27,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 605 transitions, 10932 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-20 17:51:27,571 INFO L231 Difference]: Finished difference. Result has 448 places, 568 transitions, 9546 flow [2024-06-20 17:51:27,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9186, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9546, PETRI_PLACES=448, PETRI_TRANSITIONS=568} [2024-06-20 17:51:27,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-20 17:51:27,572 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 568 transitions, 9546 flow [2024-06-20 17:51:27,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:27,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:27,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:27,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 17:51:27,572 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)] === [2024-06-20 17:51:27,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:27,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1150936911, now seen corresponding path program 15 times [2024-06-20 17:51:27,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:27,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39641467] [2024-06-20 17:51:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:27,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:51:27,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:27,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39641467] [2024-06-20 17:51:27,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39641467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:27,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:27,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:51:27,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303635187] [2024-06-20 17:51:27,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:27,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:51:27,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:27,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:51:27,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:51:27,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:51:27,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 568 transitions, 9546 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:27,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:27,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:51:27,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:29,326 INFO L124 PetriNetUnfolderBase]: 3411/5774 cut-off events. [2024-06-20 17:51:29,326 INFO L125 PetriNetUnfolderBase]: For 1096716/1096716 co-relation queries the response was YES. [2024-06-20 17:51:29,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55079 conditions, 5774 events. 3411/5774 cut-off events. For 1096716/1096716 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 39512 event pairs, 660 based on Foata normal form. 1/5770 useless extension candidates. Maximal degree in co-relation 54889. Up to 4894 conditions per place. [2024-06-20 17:51:29,415 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 422 selfloop transitions, 177 changer transitions 0/606 dead transitions. [2024-06-20 17:51:29,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 606 transitions, 11068 flow [2024-06-20 17:51:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 17:51:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 17:51:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 326 transitions. [2024-06-20 17:51:29,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300813008130081 [2024-06-20 17:51:29,416 INFO L175 Difference]: Start difference. First operand has 448 places, 568 transitions, 9546 flow. Second operand 15 states and 326 transitions. [2024-06-20 17:51:29,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 606 transitions, 11068 flow [2024-06-20 17:51:36,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 606 transitions, 10681 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 17:51:36,745 INFO L231 Difference]: Finished difference. Result has 453 places, 568 transitions, 9519 flow [2024-06-20 17:51:36,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9159, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9519, PETRI_PLACES=453, PETRI_TRANSITIONS=568} [2024-06-20 17:51:36,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-20 17:51:36,745 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 568 transitions, 9519 flow [2024-06-20 17:51:36,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:36,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:36,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:36,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 17:51:36,746 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)] === [2024-06-20 17:51:36,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:36,746 INFO L85 PathProgramCache]: Analyzing trace with hash 322143625, now seen corresponding path program 16 times [2024-06-20 17:51:36,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:36,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20744317] [2024-06-20 17:51:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:36,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:51:37,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:37,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20744317] [2024-06-20 17:51:37,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20744317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:37,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:37,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:37,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043700496] [2024-06-20 17:51:37,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:37,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:37,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:37,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:37,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:51:37,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 568 transitions, 9519 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) [2024-06-20 17:51:37,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:37,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:51:37,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:38,528 INFO L124 PetriNetUnfolderBase]: 3413/5784 cut-off events. [2024-06-20 17:51:38,528 INFO L125 PetriNetUnfolderBase]: For 1114005/1114005 co-relation queries the response was YES. [2024-06-20 17:51:38,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55135 conditions, 5784 events. 3413/5784 cut-off events. For 1114005/1114005 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 39613 event pairs, 652 based on Foata normal form. 2/5784 useless extension candidates. Maximal degree in co-relation 54944. Up to 5168 conditions per place. [2024-06-20 17:51:38,613 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 522 selfloop transitions, 58 changer transitions 0/587 dead transitions. [2024-06-20 17:51:38,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 587 transitions, 10998 flow [2024-06-20 17:51:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:51:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:51:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 17:51:38,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-20 17:51:38,614 INFO L175 Difference]: Start difference. First operand has 453 places, 568 transitions, 9519 flow. Second operand 8 states and 182 transitions. [2024-06-20 17:51:38,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 587 transitions, 10998 flow [2024-06-20 17:51:45,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 587 transitions, 10524 flow, removed 0 selfloop flow, removed 16 redundant places. [2024-06-20 17:51:45,899 INFO L231 Difference]: Finished difference. Result has 445 places, 571 transitions, 9218 flow [2024-06-20 17:51:45,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9045, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9218, PETRI_PLACES=445, PETRI_TRANSITIONS=571} [2024-06-20 17:51:45,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-20 17:51:45,900 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 571 transitions, 9218 flow [2024-06-20 17:51:45,900 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) [2024-06-20 17:51:45,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:45,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:45,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 17:51:45,901 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)] === [2024-06-20 17:51:45,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:45,901 INFO L85 PathProgramCache]: Analyzing trace with hash 601482151, now seen corresponding path program 13 times [2024-06-20 17:51:45,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:45,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205186100] [2024-06-20 17:51:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:45,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:51:46,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:46,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205186100] [2024-06-20 17:51:46,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205186100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:46,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:46,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:51:46,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203086792] [2024-06-20 17:51:46,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:46,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:51:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:51:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:51:46,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:51:46,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 571 transitions, 9218 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:46,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:46,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:51:46,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:47,518 INFO L124 PetriNetUnfolderBase]: 3455/5842 cut-off events. [2024-06-20 17:51:47,518 INFO L125 PetriNetUnfolderBase]: For 1156583/1156583 co-relation queries the response was YES. [2024-06-20 17:51:47,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55804 conditions, 5842 events. 3455/5842 cut-off events. For 1156583/1156583 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 39999 event pairs, 642 based on Foata normal form. 2/5842 useless extension candidates. Maximal degree in co-relation 55612. Up to 5174 conditions per place. [2024-06-20 17:51:47,618 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 519 selfloop transitions, 78 changer transitions 0/604 dead transitions. [2024-06-20 17:51:47,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 604 transitions, 11392 flow [2024-06-20 17:51:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:51:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:51:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-20 17:51:47,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-20 17:51:47,619 INFO L175 Difference]: Start difference. First operand has 445 places, 571 transitions, 9218 flow. Second operand 9 states and 204 transitions. [2024-06-20 17:51:47,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 604 transitions, 11392 flow [2024-06-20 17:51:55,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 604 transitions, 11264 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:51:55,279 INFO L231 Difference]: Finished difference. Result has 449 places, 585 transitions, 9527 flow [2024-06-20 17:51:55,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9090, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9527, PETRI_PLACES=449, PETRI_TRANSITIONS=585} [2024-06-20 17:51:55,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-20 17:51:55,280 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 585 transitions, 9527 flow [2024-06-20 17:51:55,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:55,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:55,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:55,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 17:51:55,280 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)] === [2024-06-20 17:51:55,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:55,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1067297241, now seen corresponding path program 14 times [2024-06-20 17:51:55,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:55,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242701004] [2024-06-20 17:51:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:55,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:51:55,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:55,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242701004] [2024-06-20 17:51:55,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242701004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:55,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:55,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:51:55,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803033053] [2024-06-20 17:51:55,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:55,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:51:55,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:55,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:51:55,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:51:55,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:51:55,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 585 transitions, 9527 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:55,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:55,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:51:55,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:56,963 INFO L124 PetriNetUnfolderBase]: 3449/5822 cut-off events. [2024-06-20 17:51:56,963 INFO L125 PetriNetUnfolderBase]: For 1164032/1164032 co-relation queries the response was YES. [2024-06-20 17:51:57,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55800 conditions, 5822 events. 3449/5822 cut-off events. For 1164032/1164032 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 39792 event pairs, 632 based on Foata normal form. 2/5822 useless extension candidates. Maximal degree in co-relation 55606. Up to 5169 conditions per place. [2024-06-20 17:51:57,058 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 516 selfloop transitions, 80 changer transitions 0/603 dead transitions. [2024-06-20 17:51:57,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 603 transitions, 11237 flow [2024-06-20 17:51:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:51:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:51:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-20 17:51:57,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-20 17:51:57,059 INFO L175 Difference]: Start difference. First operand has 449 places, 585 transitions, 9527 flow. Second operand 9 states and 202 transitions. [2024-06-20 17:51:57,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 603 transitions, 11237 flow [2024-06-20 17:52:05,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 603 transitions, 11113 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-20 17:52:05,226 INFO L231 Difference]: Finished difference. Result has 455 places, 585 transitions, 9570 flow [2024-06-20 17:52:05,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9403, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9570, PETRI_PLACES=455, PETRI_TRANSITIONS=585} [2024-06-20 17:52:05,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-20 17:52:05,226 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 585 transitions, 9570 flow [2024-06-20 17:52:05,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:05,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:05,227 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] [2024-06-20 17:52:05,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 17:52:05,227 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)] === [2024-06-20 17:52:05,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:05,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1346457207, now seen corresponding path program 17 times [2024-06-20 17:52:05,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:05,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622467497] [2024-06-20 17:52:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:05,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:52:05,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:05,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622467497] [2024-06-20 17:52:05,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622467497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:05,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:05,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:05,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928343258] [2024-06-20 17:52:05,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:05,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:05,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:05,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:05,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:05,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:52:05,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 585 transitions, 9570 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) [2024-06-20 17:52:05,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:05,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:52:05,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:06,914 INFO L124 PetriNetUnfolderBase]: 3443/5826 cut-off events. [2024-06-20 17:52:06,914 INFO L125 PetriNetUnfolderBase]: For 1165693/1165693 co-relation queries the response was YES. [2024-06-20 17:52:06,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55740 conditions, 5826 events. 3443/5826 cut-off events. For 1165693/1165693 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 39882 event pairs, 642 based on Foata normal form. 2/5826 useless extension candidates. Maximal degree in co-relation 55544. Up to 5212 conditions per place. [2024-06-20 17:52:07,007 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 56 changer transitions 0/600 dead transitions. [2024-06-20 17:52:07,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 600 transitions, 10792 flow [2024-06-20 17:52:07,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:52:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:52:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 17:52:07,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-20 17:52:07,008 INFO L175 Difference]: Start difference. First operand has 455 places, 585 transitions, 9570 flow. Second operand 8 states and 180 transitions. [2024-06-20 17:52:07,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 600 transitions, 10792 flow [2024-06-20 17:52:14,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 600 transitions, 10630 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:52:14,452 INFO L231 Difference]: Finished difference. Result has 456 places, 585 transitions, 9530 flow [2024-06-20 17:52:14,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9408, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9530, PETRI_PLACES=456, PETRI_TRANSITIONS=585} [2024-06-20 17:52:14,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-20 17:52:14,453 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 585 transitions, 9530 flow [2024-06-20 17:52:14,453 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) [2024-06-20 17:52:14,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:14,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:14,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 17:52:14,453 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)] === [2024-06-20 17:52:14,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:14,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1586284139, now seen corresponding path program 15 times [2024-06-20 17:52:14,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:14,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191365008] [2024-06-20 17:52:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:14,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:52:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:14,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191365008] [2024-06-20 17:52:14,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191365008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:14,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:14,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:52:14,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149029149] [2024-06-20 17:52:14,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:14,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:52:14,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:52:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:52:14,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:52:14,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 585 transitions, 9530 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:14,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:14,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:52:14,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:16,203 INFO L124 PetriNetUnfolderBase]: 3453/5842 cut-off events. [2024-06-20 17:52:16,203 INFO L125 PetriNetUnfolderBase]: For 1177248/1177248 co-relation queries the response was YES. [2024-06-20 17:52:16,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55946 conditions, 5842 events. 3453/5842 cut-off events. For 1177248/1177248 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 40062 event pairs, 642 based on Foata normal form. 1/5841 useless extension candidates. Maximal degree in co-relation 55749. Up to 5244 conditions per place. [2024-06-20 17:52:16,292 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 566 selfloop transitions, 35 changer transitions 0/608 dead transitions. [2024-06-20 17:52:16,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 608 transitions, 10871 flow [2024-06-20 17:52:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:52:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:52:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 17:52:16,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-20 17:52:16,293 INFO L175 Difference]: Start difference. First operand has 456 places, 585 transitions, 9530 flow. Second operand 7 states and 160 transitions. [2024-06-20 17:52:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 608 transitions, 10871 flow [2024-06-20 17:52:24,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 608 transitions, 10747 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:52:24,537 INFO L231 Difference]: Finished difference. Result has 456 places, 591 transitions, 9585 flow [2024-06-20 17:52:24,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9406, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9585, PETRI_PLACES=456, PETRI_TRANSITIONS=591} [2024-06-20 17:52:24,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-20 17:52:24,538 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 591 transitions, 9585 flow [2024-06-20 17:52:24,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:24,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:24,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:24,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 17:52:24,538 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)] === [2024-06-20 17:52:24,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:24,539 INFO L85 PathProgramCache]: Analyzing trace with hash -396034881, now seen corresponding path program 16 times [2024-06-20 17:52:24,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:24,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431963277] [2024-06-20 17:52:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:24,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:52:24,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:24,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431963277] [2024-06-20 17:52:24,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431963277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:24,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:24,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:52:24,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432908182] [2024-06-20 17:52:24,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:24,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:52:24,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:24,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:52:24,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:52:24,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:52:24,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 591 transitions, 9585 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:24,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:24,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:52:24,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:26,497 INFO L124 PetriNetUnfolderBase]: 3498/5941 cut-off events. [2024-06-20 17:52:26,497 INFO L125 PetriNetUnfolderBase]: For 1230680/1230683 co-relation queries the response was YES. [2024-06-20 17:52:26,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57190 conditions, 5941 events. 3498/5941 cut-off events. For 1230680/1230683 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 40968 event pairs, 671 based on Foata normal form. 3/5941 useless extension candidates. Maximal degree in co-relation 56992. Up to 4866 conditions per place. [2024-06-20 17:52:26,585 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 412 selfloop transitions, 215 changer transitions 0/634 dead transitions. [2024-06-20 17:52:26,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 634 transitions, 12192 flow [2024-06-20 17:52:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:52:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:52:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 17:52:26,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-20 17:52:26,586 INFO L175 Difference]: Start difference. First operand has 456 places, 591 transitions, 9585 flow. Second operand 8 states and 195 transitions. [2024-06-20 17:52:26,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 634 transitions, 12192 flow [2024-06-20 17:52:34,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 634 transitions, 12088 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 17:52:34,643 INFO L231 Difference]: Finished difference. Result has 461 places, 609 transitions, 10358 flow [2024-06-20 17:52:34,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9481, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10358, PETRI_PLACES=461, PETRI_TRANSITIONS=609} [2024-06-20 17:52:34,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-20 17:52:34,643 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 609 transitions, 10358 flow [2024-06-20 17:52:34,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:34,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:34,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:34,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 17:52:34,644 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)] === [2024-06-20 17:52:34,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash 401524193, now seen corresponding path program 17 times [2024-06-20 17:52:34,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:34,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994627313] [2024-06-20 17:52:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:34,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:52:34,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:34,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994627313] [2024-06-20 17:52:34,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994627313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:34,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:34,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:52:34,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580543178] [2024-06-20 17:52:34,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:34,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:52:34,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:34,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:52:34,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:52:34,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:52:34,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 609 transitions, 10358 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:34,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:34,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:52:34,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:36,527 INFO L124 PetriNetUnfolderBase]: 3508/5946 cut-off events. [2024-06-20 17:52:36,527 INFO L125 PetriNetUnfolderBase]: For 1261533/1261533 co-relation queries the response was YES. [2024-06-20 17:52:36,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58233 conditions, 5946 events. 3508/5946 cut-off events. For 1261533/1261533 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 40972 event pairs, 652 based on Foata normal form. 2/5946 useless extension candidates. Maximal degree in co-relation 58033. Up to 4876 conditions per place. [2024-06-20 17:52:36,614 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 208 changer transitions 0/644 dead transitions. [2024-06-20 17:52:36,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 644 transitions, 12535 flow [2024-06-20 17:52:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:52:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:52:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-20 17:52:36,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-20 17:52:36,615 INFO L175 Difference]: Start difference. First operand has 461 places, 609 transitions, 10358 flow. Second operand 9 states and 221 transitions. [2024-06-20 17:52:36,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 644 transitions, 12535 flow [2024-06-20 17:52:45,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 644 transitions, 12379 flow, removed 68 selfloop flow, removed 1 redundant places. [2024-06-20 17:52:45,028 INFO L231 Difference]: Finished difference. Result has 469 places, 613 transitions, 10719 flow [2024-06-20 17:52:45,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10222, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10719, PETRI_PLACES=469, PETRI_TRANSITIONS=613} [2024-06-20 17:52:45,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-20 17:52:45,029 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 613 transitions, 10719 flow [2024-06-20 17:52:45,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:45,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:45,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:45,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 17:52:45,029 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)] === [2024-06-20 17:52:45,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:45,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1614079291, now seen corresponding path program 18 times [2024-06-20 17:52:45,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:45,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938371401] [2024-06-20 17:52:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:45,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:52:45,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:45,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938371401] [2024-06-20 17:52:45,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938371401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:45,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:45,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:45,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554229384] [2024-06-20 17:52:45,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:45,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:45,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:45,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:45,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:45,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:52:45,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 613 transitions, 10719 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) [2024-06-20 17:52:45,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:45,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:52:45,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:47,134 INFO L124 PetriNetUnfolderBase]: 3510/5963 cut-off events. [2024-06-20 17:52:47,135 INFO L125 PetriNetUnfolderBase]: For 1274163/1274163 co-relation queries the response was YES. [2024-06-20 17:52:47,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58771 conditions, 5963 events. 3510/5963 cut-off events. For 1274163/1274163 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 41185 event pairs, 662 based on Foata normal form. 2/5963 useless extension candidates. Maximal degree in co-relation 58569. Up to 5043 conditions per place. [2024-06-20 17:52:47,224 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 479 selfloop transitions, 161 changer transitions 0/647 dead transitions. [2024-06-20 17:52:47,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 647 transitions, 12388 flow [2024-06-20 17:52:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:52:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:52:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 17:52:47,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 17:52:47,225 INFO L175 Difference]: Start difference. First operand has 469 places, 613 transitions, 10719 flow. Second operand 8 states and 202 transitions. [2024-06-20 17:52:47,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 647 transitions, 12388 flow [2024-06-20 17:52:58,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 647 transitions, 12048 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 17:52:58,251 INFO L231 Difference]: Finished difference. Result has 471 places, 616 transitions, 10789 flow [2024-06-20 17:52:58,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10384, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10789, PETRI_PLACES=471, PETRI_TRANSITIONS=616} [2024-06-20 17:52:58,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-20 17:52:58,252 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 616 transitions, 10789 flow [2024-06-20 17:52:58,252 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) [2024-06-20 17:52:58,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:58,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:58,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 17:52:58,252 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)] === [2024-06-20 17:52:58,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash 401138057, now seen corresponding path program 19 times [2024-06-20 17:52:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:58,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977233683] [2024-06-20 17:52:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:58,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:52:58,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:58,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977233683] [2024-06-20 17:52:58,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977233683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:58,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:58,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874449349] [2024-06-20 17:52:58,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:58,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:58,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:52:58,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 616 transitions, 10789 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) [2024-06-20 17:52:58,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:58,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:52:58,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:00,290 INFO L124 PetriNetUnfolderBase]: 3504/5955 cut-off events. [2024-06-20 17:53:00,290 INFO L125 PetriNetUnfolderBase]: For 1258887/1258887 co-relation queries the response was YES. [2024-06-20 17:53:00,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58387 conditions, 5955 events. 3504/5955 cut-off events. For 1258887/1258887 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 41145 event pairs, 662 based on Foata normal form. 2/5955 useless extension candidates. Maximal degree in co-relation 58185. Up to 5037 conditions per place. [2024-06-20 17:53:00,497 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 486 selfloop transitions, 154 changer transitions 0/647 dead transitions. [2024-06-20 17:53:00,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 647 transitions, 12395 flow [2024-06-20 17:53:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:53:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:53:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 17:53:00,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 17:53:00,498 INFO L175 Difference]: Start difference. First operand has 471 places, 616 transitions, 10789 flow. Second operand 8 states and 202 transitions. [2024-06-20 17:53:00,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 647 transitions, 12395 flow [2024-06-20 17:53:09,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 647 transitions, 12049 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 17:53:09,082 INFO L231 Difference]: Finished difference. Result has 471 places, 616 transitions, 10780 flow [2024-06-20 17:53:09,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10447, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10780, PETRI_PLACES=471, PETRI_TRANSITIONS=616} [2024-06-20 17:53:09,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-20 17:53:09,083 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 616 transitions, 10780 flow [2024-06-20 17:53:09,083 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) [2024-06-20 17:53:09,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:09,083 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] [2024-06-20 17:53:09,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 17:53:09,083 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)] === [2024-06-20 17:53:09,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:09,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1613872087, now seen corresponding path program 18 times [2024-06-20 17:53:09,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:09,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115531646] [2024-06-20 17:53:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:09,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:53:09,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:09,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115531646] [2024-06-20 17:53:09,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115531646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:09,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:09,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:53:09,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701892055] [2024-06-20 17:53:09,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:09,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:53:09,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:09,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:53:09,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:53:09,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:53:09,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 616 transitions, 10780 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:09,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:09,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:53:09,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:11,218 INFO L124 PetriNetUnfolderBase]: 3498/5951 cut-off events. [2024-06-20 17:53:11,218 INFO L125 PetriNetUnfolderBase]: For 1225308/1225308 co-relation queries the response was YES. [2024-06-20 17:53:11,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57933 conditions, 5951 events. 3498/5951 cut-off events. For 1225308/1225308 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 41173 event pairs, 664 based on Foata normal form. 2/5951 useless extension candidates. Maximal degree in co-relation 57732. Up to 4870 conditions per place. [2024-06-20 17:53:11,309 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 425 selfloop transitions, 217 changer transitions 0/649 dead transitions. [2024-06-20 17:53:11,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 649 transitions, 12638 flow [2024-06-20 17:53:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:53:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:53:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-20 17:53:11,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2024-06-20 17:53:11,310 INFO L175 Difference]: Start difference. First operand has 471 places, 616 transitions, 10780 flow. Second operand 9 states and 223 transitions. [2024-06-20 17:53:11,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 649 transitions, 12638 flow [2024-06-20 17:53:20,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 649 transitions, 12363 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 17:53:20,721 INFO L231 Difference]: Finished difference. Result has 473 places, 616 transitions, 10959 flow [2024-06-20 17:53:20,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10513, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10959, PETRI_PLACES=473, PETRI_TRANSITIONS=616} [2024-06-20 17:53:20,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 17:53:20,722 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 616 transitions, 10959 flow [2024-06-20 17:53:20,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:20,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:20,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:20,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 17:53:20,722 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)] === [2024-06-20 17:53:20,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:20,722 INFO L85 PathProgramCache]: Analyzing trace with hash -623936031, now seen corresponding path program 19 times [2024-06-20 17:53:20,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:20,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020858304] [2024-06-20 17:53:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:20,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:53:21,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:21,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020858304] [2024-06-20 17:53:21,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020858304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:21,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:21,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:53:21,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816191597] [2024-06-20 17:53:21,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:21,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:53:21,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:53:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:53:21,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:53:21,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 616 transitions, 10959 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:21,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:21,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:53:21,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:22,866 INFO L124 PetriNetUnfolderBase]: 3503/5933 cut-off events. [2024-06-20 17:53:22,866 INFO L125 PetriNetUnfolderBase]: For 1206716/1206719 co-relation queries the response was YES. [2024-06-20 17:53:22,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58004 conditions, 5933 events. 3503/5933 cut-off events. For 1206716/1206719 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 40855 event pairs, 651 based on Foata normal form. 3/5933 useless extension candidates. Maximal degree in co-relation 57804. Up to 4874 conditions per place. [2024-06-20 17:53:22,969 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 415 selfloop transitions, 225 changer transitions 0/647 dead transitions. [2024-06-20 17:53:22,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 647 transitions, 13344 flow [2024-06-20 17:53:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:53:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:53:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 17:53:22,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 17:53:22,970 INFO L175 Difference]: Start difference. First operand has 473 places, 616 transitions, 10959 flow. Second operand 8 states and 198 transitions. [2024-06-20 17:53:22,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 647 transitions, 13344 flow [2024-06-20 17:53:30,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 647 transitions, 12925 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 17:53:30,166 INFO L231 Difference]: Finished difference. Result has 473 places, 619 transitions, 11065 flow [2024-06-20 17:53:30,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10552, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11065, PETRI_PLACES=473, PETRI_TRANSITIONS=619} [2024-06-20 17:53:30,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 17:53:30,167 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 619 transitions, 11065 flow [2024-06-20 17:53:30,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:30,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:30,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:30,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 17:53:30,167 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)] === [2024-06-20 17:53:30,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:30,167 INFO L85 PathProgramCache]: Analyzing trace with hash -624321981, now seen corresponding path program 20 times [2024-06-20 17:53:30,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:30,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803732665] [2024-06-20 17:53:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:30,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:53:30,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:30,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803732665] [2024-06-20 17:53:30,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803732665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:30,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:30,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:53:30,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410193308] [2024-06-20 17:53:30,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:30,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:53:30,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:30,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:53:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:53:30,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:53:30,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 619 transitions, 11065 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:30,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:30,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:53:30,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:32,208 INFO L124 PetriNetUnfolderBase]: 3500/5929 cut-off events. [2024-06-20 17:53:32,208 INFO L125 PetriNetUnfolderBase]: For 1199418/1199421 co-relation queries the response was YES. [2024-06-20 17:53:32,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57873 conditions, 5929 events. 3500/5929 cut-off events. For 1199418/1199421 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 40802 event pairs, 651 based on Foata normal form. 3/5929 useless extension candidates. Maximal degree in co-relation 57673. Up to 4872 conditions per place. [2024-06-20 17:53:32,300 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 415 selfloop transitions, 227 changer transitions 0/649 dead transitions. [2024-06-20 17:53:32,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 649 transitions, 13155 flow [2024-06-20 17:53:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:53:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:53:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 17:53:32,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 17:53:32,301 INFO L175 Difference]: Start difference. First operand has 473 places, 619 transitions, 11065 flow. Second operand 8 states and 201 transitions. [2024-06-20 17:53:32,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 649 transitions, 13155 flow [2024-06-20 17:53:40,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 649 transitions, 12494 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-20 17:53:40,448 INFO L231 Difference]: Finished difference. Result has 474 places, 619 transitions, 10864 flow [2024-06-20 17:53:40,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10404, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10864, PETRI_PLACES=474, PETRI_TRANSITIONS=619} [2024-06-20 17:53:40,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-20 17:53:40,449 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 619 transitions, 10864 flow [2024-06-20 17:53:40,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:40,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:40,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:40,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 17:53:40,449 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)] === [2024-06-20 17:53:40,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:40,449 INFO L85 PathProgramCache]: Analyzing trace with hash -477148113, now seen corresponding path program 20 times [2024-06-20 17:53:40,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:40,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523798015] [2024-06-20 17:53:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:40,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:53:40,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:40,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523798015] [2024-06-20 17:53:40,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523798015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:40,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:40,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:53:40,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880406706] [2024-06-20 17:53:40,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:40,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:53:40,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:40,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:53:40,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:53:40,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:53:40,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 619 transitions, 10864 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) [2024-06-20 17:53:40,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:40,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:53:40,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:42,525 INFO L124 PetriNetUnfolderBase]: 3494/5932 cut-off events. [2024-06-20 17:53:42,525 INFO L125 PetriNetUnfolderBase]: For 1202381/1202381 co-relation queries the response was YES. [2024-06-20 17:53:42,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57595 conditions, 5932 events. 3494/5932 cut-off events. For 1202381/1202381 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 40961 event pairs, 652 based on Foata normal form. 2/5932 useless extension candidates. Maximal degree in co-relation 57394. Up to 5185 conditions per place. [2024-06-20 17:53:42,628 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 556 selfloop transitions, 80 changer transitions 0/643 dead transitions. [2024-06-20 17:53:42,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 643 transitions, 12230 flow [2024-06-20 17:53:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:53:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:53:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 17:53:42,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 17:53:42,630 INFO L175 Difference]: Start difference. First operand has 474 places, 619 transitions, 10864 flow. Second operand 6 states and 156 transitions. [2024-06-20 17:53:42,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 643 transitions, 12230 flow [2024-06-20 17:53:51,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 643 transitions, 11646 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 17:53:51,501 INFO L231 Difference]: Finished difference. Result has 473 places, 621 transitions, 10565 flow [2024-06-20 17:53:51,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10284, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10565, PETRI_PLACES=473, PETRI_TRANSITIONS=621} [2024-06-20 17:53:51,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 17:53:51,501 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 621 transitions, 10565 flow [2024-06-20 17:53:51,501 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) [2024-06-20 17:53:51,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:51,502 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] [2024-06-20 17:53:51,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 17:53:51,502 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)] === [2024-06-20 17:53:51,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash -476910777, now seen corresponding path program 21 times [2024-06-20 17:53:51,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:51,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188781018] [2024-06-20 17:53:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:51,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:53:51,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:51,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188781018] [2024-06-20 17:53:51,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188781018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:51,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:51,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:53:51,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810059317] [2024-06-20 17:53:51,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:51,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:53:51,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:53:51,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:53:51,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:53:51,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 621 transitions, 10565 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:51,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:51,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:53:51,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:53,669 INFO L124 PetriNetUnfolderBase]: 3491/5928 cut-off events. [2024-06-20 17:53:53,670 INFO L125 PetriNetUnfolderBase]: For 1204588/1204588 co-relation queries the response was YES. [2024-06-20 17:53:53,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57317 conditions, 5928 events. 3491/5928 cut-off events. For 1204588/1204588 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 40925 event pairs, 652 based on Foata normal form. 1/5927 useless extension candidates. Maximal degree in co-relation 57114. Up to 5255 conditions per place. [2024-06-20 17:53:53,763 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 572 selfloop transitions, 64 changer transitions 0/643 dead transitions. [2024-06-20 17:53:53,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 643 transitions, 12139 flow [2024-06-20 17:53:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:53:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:53:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 17:53:53,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-20 17:53:53,765 INFO L175 Difference]: Start difference. First operand has 473 places, 621 transitions, 10565 flow. Second operand 8 states and 187 transitions. [2024-06-20 17:53:53,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 643 transitions, 12139 flow [2024-06-20 17:54:01,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 643 transitions, 11806 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-20 17:54:01,345 INFO L231 Difference]: Finished difference. Result has 473 places, 621 transitions, 10376 flow [2024-06-20 17:54:01,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10234, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10376, PETRI_PLACES=473, PETRI_TRANSITIONS=621} [2024-06-20 17:54:01,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 17:54:01,345 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 621 transitions, 10376 flow [2024-06-20 17:54:01,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:01,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:01,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:01,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 17:54:01,346 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)] === [2024-06-20 17:54:01,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:01,346 INFO L85 PathProgramCache]: Analyzing trace with hash -477147927, now seen corresponding path program 22 times [2024-06-20 17:54:01,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:01,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828138436] [2024-06-20 17:54:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:01,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:54:01,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:01,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828138436] [2024-06-20 17:54:01,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828138436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:01,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:01,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:54:01,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093335545] [2024-06-20 17:54:01,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:01,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:54:01,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:01,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:54:01,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:54:01,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:54:01,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 621 transitions, 10376 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:01,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:01,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:54:01,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:03,420 INFO L124 PetriNetUnfolderBase]: 3488/5924 cut-off events. [2024-06-20 17:54:03,421 INFO L125 PetriNetUnfolderBase]: For 1193244/1193244 co-relation queries the response was YES. [2024-06-20 17:54:03,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56872 conditions, 5924 events. 3488/5924 cut-off events. For 1193244/1193244 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 40856 event pairs, 652 based on Foata normal form. 1/5923 useless extension candidates. Maximal degree in co-relation 56671. Up to 5252 conditions per place. [2024-06-20 17:54:03,514 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 571 selfloop transitions, 62 changer transitions 0/640 dead transitions. [2024-06-20 17:54:03,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 640 transitions, 11690 flow [2024-06-20 17:54:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:54:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:54:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 17:54:03,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 17:54:03,515 INFO L175 Difference]: Start difference. First operand has 473 places, 621 transitions, 10376 flow. Second operand 6 states and 148 transitions. [2024-06-20 17:54:03,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 640 transitions, 11690 flow [2024-06-20 17:54:12,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 640 transitions, 11482 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-20 17:54:13,006 INFO L231 Difference]: Finished difference. Result has 470 places, 621 transitions, 10302 flow [2024-06-20 17:54:13,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10168, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10302, PETRI_PLACES=470, PETRI_TRANSITIONS=621} [2024-06-20 17:54:13,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-20 17:54:13,006 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 621 transitions, 10302 flow [2024-06-20 17:54:13,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:13,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:13,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:13,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 17:54:13,007 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)] === [2024-06-20 17:54:13,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash -772023837, now seen corresponding path program 3 times [2024-06-20 17:54:13,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:13,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964738334] [2024-06-20 17:54:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:13,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:54:13,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:13,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964738334] [2024-06-20 17:54:13,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964738334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:13,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:13,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:54:13,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303031345] [2024-06-20 17:54:13,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:13,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:54:13,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:13,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:54:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:54:13,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:54:13,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 621 transitions, 10302 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:13,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:13,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:54:13,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:14,885 INFO L124 PetriNetUnfolderBase]: 3475/5905 cut-off events. [2024-06-20 17:54:14,885 INFO L125 PetriNetUnfolderBase]: For 1185723/1185723 co-relation queries the response was YES. [2024-06-20 17:54:14,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55954 conditions, 5905 events. 3475/5905 cut-off events. For 1185723/1185723 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 40731 event pairs, 561 based on Foata normal form. 6/5909 useless extension candidates. Maximal degree in co-relation 55753. Up to 5130 conditions per place. [2024-06-20 17:54:14,982 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 605 selfloop transitions, 37 changer transitions 0/649 dead transitions. [2024-06-20 17:54:14,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 649 transitions, 11753 flow [2024-06-20 17:54:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:54:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:54:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 17:54:14,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 17:54:14,983 INFO L175 Difference]: Start difference. First operand has 470 places, 621 transitions, 10302 flow. Second operand 6 states and 150 transitions. [2024-06-20 17:54:14,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 649 transitions, 11753 flow [2024-06-20 17:54:24,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 649 transitions, 11603 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:54:24,951 INFO L231 Difference]: Finished difference. Result has 469 places, 621 transitions, 10230 flow [2024-06-20 17:54:24,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10152, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10230, PETRI_PLACES=469, PETRI_TRANSITIONS=621} [2024-06-20 17:54:24,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-20 17:54:24,952 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 621 transitions, 10230 flow [2024-06-20 17:54:24,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:24,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:24,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:24,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 17:54:24,952 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)] === [2024-06-20 17:54:24,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:24,953 INFO L85 PathProgramCache]: Analyzing trace with hash 871992457, now seen corresponding path program 3 times [2024-06-20 17:54:24,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:24,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621813607] [2024-06-20 17:54:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:24,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:54:25,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621813607] [2024-06-20 17:54:25,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621813607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:25,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:25,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:54:25,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912239159] [2024-06-20 17:54:25,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:25,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:54:25,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:54:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:54:25,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:54:25,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 621 transitions, 10230 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:25,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:25,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:54:25,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:26,796 INFO L124 PetriNetUnfolderBase]: 3470/5893 cut-off events. [2024-06-20 17:54:26,796 INFO L125 PetriNetUnfolderBase]: For 1123381/1123381 co-relation queries the response was YES. [2024-06-20 17:54:26,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55487 conditions, 5893 events. 3470/5893 cut-off events. For 1123381/1123381 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 40644 event pairs, 652 based on Foata normal form. 2/5890 useless extension candidates. Maximal degree in co-relation 55287. Up to 5174 conditions per place. [2024-06-20 17:54:26,889 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 563 selfloop transitions, 69 changer transitions 0/640 dead transitions. [2024-06-20 17:54:26,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 640 transitions, 11540 flow [2024-06-20 17:54:26,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:54:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:54:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 17:54:26,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-20 17:54:26,890 INFO L175 Difference]: Start difference. First operand has 469 places, 621 transitions, 10230 flow. Second operand 8 states and 187 transitions. [2024-06-20 17:54:26,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 640 transitions, 11540 flow [2024-06-20 17:54:35,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 640 transitions, 11417 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 17:54:35,130 INFO L231 Difference]: Finished difference. Result has 472 places, 621 transitions, 10250 flow [2024-06-20 17:54:35,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10107, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10250, PETRI_PLACES=472, PETRI_TRANSITIONS=621} [2024-06-20 17:54:35,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-20 17:54:35,130 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 621 transitions, 10250 flow [2024-06-20 17:54:35,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:35,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:35,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:35,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 17:54:35,131 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)] === [2024-06-20 17:54:35,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:35,131 INFO L85 PathProgramCache]: Analyzing trace with hash 872177155, now seen corresponding path program 5 times [2024-06-20 17:54:35,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:35,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645617511] [2024-06-20 17:54:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:35,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:54:35,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:35,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645617511] [2024-06-20 17:54:35,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645617511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:35,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:35,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:54:35,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572854977] [2024-06-20 17:54:35,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:35,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:54:35,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:35,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:54:35,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:54:35,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:54:35,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 621 transitions, 10250 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:35,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:35,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:54:35,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:37,048 INFO L124 PetriNetUnfolderBase]: 3447/5860 cut-off events. [2024-06-20 17:54:37,048 INFO L125 PetriNetUnfolderBase]: For 1124223/1124223 co-relation queries the response was YES. [2024-06-20 17:54:37,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54075 conditions, 5860 events. 3447/5860 cut-off events. For 1124223/1124223 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 40464 event pairs, 647 based on Foata normal form. 10/5865 useless extension candidates. Maximal degree in co-relation 53874. Up to 4951 conditions per place. [2024-06-20 17:54:37,143 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 462 selfloop transitions, 174 changer transitions 0/644 dead transitions. [2024-06-20 17:54:37,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 644 transitions, 11631 flow [2024-06-20 17:54:37,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:54:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:54:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 17:54:37,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 17:54:37,144 INFO L175 Difference]: Start difference. First operand has 472 places, 621 transitions, 10250 flow. Second operand 8 states and 194 transitions. [2024-06-20 17:54:37,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 644 transitions, 11631 flow [2024-06-20 17:54:44,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 644 transitions, 11450 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 17:54:44,650 INFO L231 Difference]: Finished difference. Result has 474 places, 622 transitions, 10450 flow [2024-06-20 17:54:44,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10077, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10450, PETRI_PLACES=474, PETRI_TRANSITIONS=622} [2024-06-20 17:54:44,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-20 17:54:44,651 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 622 transitions, 10450 flow [2024-06-20 17:54:44,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:44,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:44,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:44,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 17:54:44,652 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)] === [2024-06-20 17:54:44,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:44,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1578108951, now seen corresponding path program 4 times [2024-06-20 17:54:44,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:44,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849275316] [2024-06-20 17:54:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:44,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:54:44,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:44,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849275316] [2024-06-20 17:54:44,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849275316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:44,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:44,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:54:44,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618802096] [2024-06-20 17:54:44,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:44,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:54:44,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:44,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:54:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:54:44,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:54:44,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 622 transitions, 10450 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:54:44,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:44,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:54:44,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:46,518 INFO L124 PetriNetUnfolderBase]: 3481/5907 cut-off events. [2024-06-20 17:54:46,519 INFO L125 PetriNetUnfolderBase]: For 1114043/1114043 co-relation queries the response was YES. [2024-06-20 17:54:46,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55281 conditions, 5907 events. 3481/5907 cut-off events. For 1114043/1114043 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 40794 event pairs, 638 based on Foata normal form. 2/5902 useless extension candidates. Maximal degree in co-relation 55079. Up to 5149 conditions per place. [2024-06-20 17:54:46,613 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 569 selfloop transitions, 74 changer transitions 0/651 dead transitions. [2024-06-20 17:54:46,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 651 transitions, 12178 flow [2024-06-20 17:54:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:54:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:54:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 17:54:46,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 17:54:46,614 INFO L175 Difference]: Start difference. First operand has 474 places, 622 transitions, 10450 flow. Second operand 7 states and 172 transitions. [2024-06-20 17:54:46,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 651 transitions, 12178 flow [2024-06-20 17:54:55,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 651 transitions, 11822 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:54:55,198 INFO L231 Difference]: Finished difference. Result has 476 places, 628 transitions, 10402 flow [2024-06-20 17:54:55,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10094, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10402, PETRI_PLACES=476, PETRI_TRANSITIONS=628} [2024-06-20 17:54:55,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-20 17:54:55,199 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 628 transitions, 10402 flow [2024-06-20 17:54:55,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:54:55,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:55,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:55,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 17:54:55,199 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)] === [2024-06-20 17:54:55,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:55,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1575251991, now seen corresponding path program 5 times [2024-06-20 17:54:55,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:55,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746874472] [2024-06-20 17:54:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:55,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:54:55,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:55,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746874472] [2024-06-20 17:54:55,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746874472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:55,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:55,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:54:55,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3304571] [2024-06-20 17:54:55,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:55,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:54:55,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:55,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:54:55,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:54:55,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:54:55,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 628 transitions, 10402 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:54:55,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:55,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:54:55,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:57,069 INFO L124 PetriNetUnfolderBase]: 3489/5926 cut-off events. [2024-06-20 17:54:57,069 INFO L125 PetriNetUnfolderBase]: For 1128117/1128117 co-relation queries the response was YES. [2024-06-20 17:54:57,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55414 conditions, 5926 events. 3489/5926 cut-off events. For 1128117/1128117 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 40950 event pairs, 647 based on Foata normal form. 2/5923 useless extension candidates. Maximal degree in co-relation 55210. Up to 5203 conditions per place. [2024-06-20 17:54:57,162 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 571 selfloop transitions, 69 changer transitions 0/648 dead transitions. [2024-06-20 17:54:57,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 648 transitions, 11778 flow [2024-06-20 17:54:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:54:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:54:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 17:54:57,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:54:57,163 INFO L175 Difference]: Start difference. First operand has 476 places, 628 transitions, 10402 flow. Second operand 7 states and 168 transitions. [2024-06-20 17:54:57,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 648 transitions, 11778 flow [2024-06-20 17:55:03,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 648 transitions, 11592 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-20 17:55:03,712 INFO L231 Difference]: Finished difference. Result has 480 places, 630 transitions, 10415 flow [2024-06-20 17:55:03,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10238, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10415, PETRI_PLACES=480, PETRI_TRANSITIONS=630} [2024-06-20 17:55:03,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-20 17:55:03,713 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 630 transitions, 10415 flow [2024-06-20 17:55:03,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:55:03,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:03,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:03,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 17:55:03,713 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)] === [2024-06-20 17:55:03,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1016248343, now seen corresponding path program 6 times [2024-06-20 17:55:03,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:03,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048940380] [2024-06-20 17:55:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:03,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:55:03,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:03,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048940380] [2024-06-20 17:55:03,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048940380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:03,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:03,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:55:03,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6754823] [2024-06-20 17:55:03,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:03,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:55:03,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:03,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:55:03,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:55:03,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:55:03,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 630 transitions, 10415 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:55:03,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:03,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:55:03,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:05,706 INFO L124 PetriNetUnfolderBase]: 3497/5954 cut-off events. [2024-06-20 17:55:05,706 INFO L125 PetriNetUnfolderBase]: For 1144014/1144014 co-relation queries the response was YES. [2024-06-20 17:55:05,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55617 conditions, 5954 events. 3497/5954 cut-off events. For 1144014/1144014 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 41192 event pairs, 536 based on Foata normal form. 2/5951 useless extension candidates. Maximal degree in co-relation 55411. Up to 5002 conditions per place. [2024-06-20 17:55:05,809 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 560 selfloop transitions, 92 changer transitions 0/660 dead transitions. [2024-06-20 17:55:05,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 660 transitions, 12417 flow [2024-06-20 17:55:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:55:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:55:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 17:55:05,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 17:55:05,810 INFO L175 Difference]: Start difference. First operand has 480 places, 630 transitions, 10415 flow. Second operand 7 states and 173 transitions. [2024-06-20 17:55:05,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 660 transitions, 12417 flow [2024-06-20 17:55:13,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 660 transitions, 12262 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:55:13,848 INFO L231 Difference]: Finished difference. Result has 483 places, 635 transitions, 10596 flow [2024-06-20 17:55:13,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10260, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10596, PETRI_PLACES=483, PETRI_TRANSITIONS=635} [2024-06-20 17:55:13,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-20 17:55:13,849 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 635 transitions, 10596 flow [2024-06-20 17:55:13,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:55:13,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:13,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:13,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 17:55:13,850 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)] === [2024-06-20 17:55:13,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:13,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1283027963, now seen corresponding path program 7 times [2024-06-20 17:55:13,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:13,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351825435] [2024-06-20 17:55:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:13,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:55:14,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:14,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351825435] [2024-06-20 17:55:14,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351825435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:14,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:14,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:55:14,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764210239] [2024-06-20 17:55:14,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:14,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:55:14,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:14,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:55:14,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:55:14,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:55:14,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 635 transitions, 10596 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:14,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:14,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:55:14,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:15,795 INFO L124 PetriNetUnfolderBase]: 3505/5965 cut-off events. [2024-06-20 17:55:15,795 INFO L125 PetriNetUnfolderBase]: For 1163314/1163314 co-relation queries the response was YES. [2024-06-20 17:55:15,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56145 conditions, 5965 events. 3505/5965 cut-off events. For 1163314/1163314 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 41346 event pairs, 550 based on Foata normal form. 2/5962 useless extension candidates. Maximal degree in co-relation 55937. Up to 5119 conditions per place. [2024-06-20 17:55:15,889 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 560 selfloop transitions, 93 changer transitions 0/661 dead transitions. [2024-06-20 17:55:15,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 661 transitions, 12016 flow [2024-06-20 17:55:15,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:55:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:55:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 17:55:15,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:55:15,890 INFO L175 Difference]: Start difference. First operand has 483 places, 635 transitions, 10596 flow. Second operand 8 states and 192 transitions. [2024-06-20 17:55:15,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 661 transitions, 12016 flow [2024-06-20 17:55:23,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 661 transitions, 11737 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-20 17:55:23,880 INFO L231 Difference]: Finished difference. Result has 487 places, 637 transitions, 10568 flow [2024-06-20 17:55:23,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10343, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10568, PETRI_PLACES=487, PETRI_TRANSITIONS=637} [2024-06-20 17:55:23,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-20 17:55:23,881 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 637 transitions, 10568 flow [2024-06-20 17:55:23,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:23,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:23,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:23,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 17:55:23,881 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)] === [2024-06-20 17:55:23,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:23,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1452987397, now seen corresponding path program 8 times [2024-06-20 17:55:23,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:23,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453471639] [2024-06-20 17:55:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:23,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:55:24,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:24,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453471639] [2024-06-20 17:55:24,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453471639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:24,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:24,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:55:24,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307651132] [2024-06-20 17:55:24,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:24,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:55:24,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:55:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:55:24,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:55:24,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 637 transitions, 10568 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:24,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:24,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:55:24,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:25,757 INFO L124 PetriNetUnfolderBase]: 3500/5951 cut-off events. [2024-06-20 17:55:25,757 INFO L125 PetriNetUnfolderBase]: For 1161747/1161747 co-relation queries the response was YES. [2024-06-20 17:55:25,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55723 conditions, 5951 events. 3500/5951 cut-off events. For 1161747/1161747 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 41225 event pairs, 650 based on Foata normal form. 2/5948 useless extension candidates. Maximal degree in co-relation 55514. Up to 5220 conditions per place. [2024-06-20 17:55:26,093 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 575 selfloop transitions, 73 changer transitions 0/656 dead transitions. [2024-06-20 17:55:26,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 656 transitions, 11910 flow [2024-06-20 17:55:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:55:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:55:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 17:55:26,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-20 17:55:26,094 INFO L175 Difference]: Start difference. First operand has 487 places, 637 transitions, 10568 flow. Second operand 8 states and 187 transitions. [2024-06-20 17:55:26,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 656 transitions, 11910 flow [2024-06-20 17:55:33,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 656 transitions, 11707 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 17:55:33,824 INFO L231 Difference]: Finished difference. Result has 489 places, 637 transitions, 10516 flow [2024-06-20 17:55:33,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10365, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10516, PETRI_PLACES=489, PETRI_TRANSITIONS=637} [2024-06-20 17:55:33,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-20 17:55:33,824 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 637 transitions, 10516 flow [2024-06-20 17:55:33,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:33,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:33,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:33,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 17:55:33,825 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)] === [2024-06-20 17:55:33,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:33,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1462510597, now seen corresponding path program 9 times [2024-06-20 17:55:33,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:33,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791151012] [2024-06-20 17:55:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:33,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:55:34,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:34,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791151012] [2024-06-20 17:55:34,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791151012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:34,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:34,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:55:34,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354295473] [2024-06-20 17:55:34,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:34,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:55:34,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:34,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:55:34,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:55:34,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:55:34,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 637 transitions, 10516 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:34,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:34,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:55:34,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:35,819 INFO L124 PetriNetUnfolderBase]: 3495/5940 cut-off events. [2024-06-20 17:55:35,819 INFO L125 PetriNetUnfolderBase]: For 1161282/1161282 co-relation queries the response was YES. [2024-06-20 17:55:35,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55404 conditions, 5940 events. 3495/5940 cut-off events. For 1161282/1161282 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 41146 event pairs, 643 based on Foata normal form. 2/5933 useless extension candidates. Maximal degree in co-relation 55194. Up to 5193 conditions per place. [2024-06-20 17:55:35,916 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 572 selfloop transitions, 78 changer transitions 0/658 dead transitions. [2024-06-20 17:55:35,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 658 transitions, 11866 flow [2024-06-20 17:55:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:55:35,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:55:35,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-20 17:55:35,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 17:55:35,917 INFO L175 Difference]: Start difference. First operand has 489 places, 637 transitions, 10516 flow. Second operand 9 states and 207 transitions. [2024-06-20 17:55:35,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 658 transitions, 11866 flow [2024-06-20 17:55:44,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 658 transitions, 11738 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:55:44,589 INFO L231 Difference]: Finished difference. Result has 493 places, 637 transitions, 10549 flow [2024-06-20 17:55:44,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10388, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10549, PETRI_PLACES=493, PETRI_TRANSITIONS=637} [2024-06-20 17:55:44,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-20 17:55:44,590 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 637 transitions, 10549 flow [2024-06-20 17:55:44,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:44,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:44,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:44,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 17:55:44,590 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)] === [2024-06-20 17:55:44,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:44,590 INFO L85 PathProgramCache]: Analyzing trace with hash 857811851, now seen corresponding path program 10 times [2024-06-20 17:55:44,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:44,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325159252] [2024-06-20 17:55:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:44,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:55:44,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:44,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325159252] [2024-06-20 17:55:44,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325159252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:44,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:44,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:55:44,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169702500] [2024-06-20 17:55:44,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:44,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:55:44,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:44,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:55:44,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:55:44,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:55:44,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 637 transitions, 10549 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:55:44,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:44,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:55:44,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:46,497 INFO L124 PetriNetUnfolderBase]: 3539/6035 cut-off events. [2024-06-20 17:55:46,497 INFO L125 PetriNetUnfolderBase]: For 1263705/1263705 co-relation queries the response was YES. [2024-06-20 17:55:46,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56243 conditions, 6035 events. 3539/6035 cut-off events. For 1263705/1263705 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 42006 event pairs, 657 based on Foata normal form. 12/6045 useless extension candidates. Maximal degree in co-relation 56032. Up to 5337 conditions per place. [2024-06-20 17:55:46,594 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 608 selfloop transitions, 44 changer transitions 0/660 dead transitions. [2024-06-20 17:55:46,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 660 transitions, 12027 flow [2024-06-20 17:55:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:55:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:55:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 17:55:46,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-20 17:55:46,595 INFO L175 Difference]: Start difference. First operand has 493 places, 637 transitions, 10549 flow. Second operand 8 states and 189 transitions. [2024-06-20 17:55:46,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 660 transitions, 12027 flow [2024-06-20 17:55:55,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 660 transitions, 11850 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 17:55:55,015 INFO L231 Difference]: Finished difference. Result has 494 places, 641 transitions, 10575 flow [2024-06-20 17:55:55,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10372, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10575, PETRI_PLACES=494, PETRI_TRANSITIONS=641} [2024-06-20 17:55:55,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-20 17:55:55,016 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 641 transitions, 10575 flow [2024-06-20 17:55:55,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:55:55,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:55,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:55,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 17:55:55,016 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)] === [2024-06-20 17:55:55,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash 588175271, now seen corresponding path program 11 times [2024-06-20 17:55:55,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:55,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728258848] [2024-06-20 17:55:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:55,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:55:55,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:55,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728258848] [2024-06-20 17:55:55,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728258848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:55,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:55,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:55:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058420747] [2024-06-20 17:55:55,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:55,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:55:55,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:55:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:55:55,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:55:55,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 641 transitions, 10575 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:55:55,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:55,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:55:55,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:57,029 INFO L124 PetriNetUnfolderBase]: 3517/6001 cut-off events. [2024-06-20 17:55:57,029 INFO L125 PetriNetUnfolderBase]: For 1193221/1193221 co-relation queries the response was YES. [2024-06-20 17:55:57,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54654 conditions, 6001 events. 3517/6001 cut-off events. For 1193221/1193221 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 41806 event pairs, 625 based on Foata normal form. 12/6007 useless extension candidates. Maximal degree in co-relation 54442. Up to 5097 conditions per place. [2024-06-20 17:55:57,125 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 607 selfloop transitions, 51 changer transitions 0/666 dead transitions. [2024-06-20 17:55:57,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 666 transitions, 12039 flow [2024-06-20 17:55:57,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:55:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:55:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 17:55:57,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 17:55:57,126 INFO L175 Difference]: Start difference. First operand has 494 places, 641 transitions, 10575 flow. Second operand 8 states and 193 transitions. [2024-06-20 17:55:57,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 666 transitions, 12039 flow [2024-06-20 17:56:05,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 666 transitions, 11908 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 17:56:05,026 INFO L231 Difference]: Finished difference. Result has 496 places, 643 transitions, 10592 flow [2024-06-20 17:56:05,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10444, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10592, PETRI_PLACES=496, PETRI_TRANSITIONS=643} [2024-06-20 17:56:05,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-20 17:56:05,026 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 643 transitions, 10592 flow [2024-06-20 17:56:05,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:56:05,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:05,026 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] [2024-06-20 17:56:05,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 17:56:05,027 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)] === [2024-06-20 17:56:05,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:05,027 INFO L85 PathProgramCache]: Analyzing trace with hash 601496039, now seen corresponding path program 6 times [2024-06-20 17:56:05,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:05,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073026402] [2024-06-20 17:56:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:05,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:56:05,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:05,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073026402] [2024-06-20 17:56:05,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073026402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:05,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:05,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:56:05,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394630784] [2024-06-20 17:56:05,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:05,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:56:05,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:05,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:56:05,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:56:05,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:56:05,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 643 transitions, 10592 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:05,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:05,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:56:05,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:07,075 INFO L124 PetriNetUnfolderBase]: 3553/6061 cut-off events. [2024-06-20 17:56:07,075 INFO L125 PetriNetUnfolderBase]: For 1197404/1197404 co-relation queries the response was YES. [2024-06-20 17:56:07,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55229 conditions, 6061 events. 3553/6061 cut-off events. For 1197404/1197404 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 42268 event pairs, 653 based on Foata normal form. 10/6069 useless extension candidates. Maximal degree in co-relation 55016. Up to 5347 conditions per place. [2024-06-20 17:56:07,179 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 602 selfloop transitions, 55 changer transitions 0/665 dead transitions. [2024-06-20 17:56:07,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 665 transitions, 12054 flow [2024-06-20 17:56:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:56:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:56:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 17:56:07,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-20 17:56:07,180 INFO L175 Difference]: Start difference. First operand has 496 places, 643 transitions, 10592 flow. Second operand 9 states and 208 transitions. [2024-06-20 17:56:07,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 665 transitions, 12054 flow [2024-06-20 17:56:15,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 665 transitions, 11938 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:56:15,406 INFO L231 Difference]: Finished difference. Result has 499 places, 645 transitions, 10666 flow [2024-06-20 17:56:15,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10476, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10666, PETRI_PLACES=499, PETRI_TRANSITIONS=645} [2024-06-20 17:56:15,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-20 17:56:15,407 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 645 transitions, 10666 flow [2024-06-20 17:56:15,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:15,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:15,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:15,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 17:56:15,407 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)] === [2024-06-20 17:56:15,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:15,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1025298933, now seen corresponding path program 12 times [2024-06-20 17:56:15,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:15,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311192537] [2024-06-20 17:56:15,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:15,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:56:15,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:15,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311192537] [2024-06-20 17:56:15,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311192537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:15,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:15,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:56:15,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144691253] [2024-06-20 17:56:15,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:15,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:56:15,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:15,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:56:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:56:15,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:56:15,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 645 transitions, 10666 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:56:15,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:15,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:56:15,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:17,581 INFO L124 PetriNetUnfolderBase]: 3620/6171 cut-off events. [2024-06-20 17:56:17,582 INFO L125 PetriNetUnfolderBase]: For 1306379/1306379 co-relation queries the response was YES. [2024-06-20 17:56:17,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56087 conditions, 6171 events. 3620/6171 cut-off events. For 1306379/1306379 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 43182 event pairs, 655 based on Foata normal form. 22/6191 useless extension candidates. Maximal degree in co-relation 55873. Up to 5247 conditions per place. [2024-06-20 17:56:17,681 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 577 selfloop transitions, 98 changer transitions 0/683 dead transitions. [2024-06-20 17:56:17,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 683 transitions, 12255 flow [2024-06-20 17:56:17,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:56:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:56:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 17:56:17,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-20 17:56:17,683 INFO L175 Difference]: Start difference. First operand has 499 places, 645 transitions, 10666 flow. Second operand 8 states and 209 transitions. [2024-06-20 17:56:17,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 683 transitions, 12255 flow [2024-06-20 17:56:25,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 683 transitions, 12091 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 17:56:25,937 INFO L231 Difference]: Finished difference. Result has 500 places, 649 transitions, 10852 flow [2024-06-20 17:56:25,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10502, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10852, PETRI_PLACES=500, PETRI_TRANSITIONS=649} [2024-06-20 17:56:25,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-20 17:56:25,938 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 649 transitions, 10852 flow [2024-06-20 17:56:25,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:56:25,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:25,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:25,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 17:56:25,938 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)] === [2024-06-20 17:56:25,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1880110937, now seen corresponding path program 13 times [2024-06-20 17:56:25,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:25,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296436098] [2024-06-20 17:56:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:25,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:56:26,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:26,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296436098] [2024-06-20 17:56:26,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296436098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:26,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:26,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:56:26,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699253575] [2024-06-20 17:56:26,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:26,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:56:26,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:26,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:56:26,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:56:26,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:56:26,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 649 transitions, 10852 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:56:26,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:26,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:56:26,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:27,977 INFO L124 PetriNetUnfolderBase]: 3575/6123 cut-off events. [2024-06-20 17:56:27,977 INFO L125 PetriNetUnfolderBase]: For 1140719/1140719 co-relation queries the response was YES. [2024-06-20 17:56:28,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53075 conditions, 6123 events. 3575/6123 cut-off events. For 1140719/1140719 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 42965 event pairs, 490 based on Foata normal form. 22/6143 useless extension candidates. Maximal degree in co-relation 52860. Up to 4501 conditions per place. [2024-06-20 17:56:28,077 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 564 selfloop transitions, 118 changer transitions 0/690 dead transitions. [2024-06-20 17:56:28,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 690 transitions, 12708 flow [2024-06-20 17:56:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:56:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:56:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 17:56:28,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649390243902439 [2024-06-20 17:56:28,079 INFO L175 Difference]: Start difference. First operand has 500 places, 649 transitions, 10852 flow. Second operand 8 states and 213 transitions. [2024-06-20 17:56:28,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 690 transitions, 12708 flow [2024-06-20 17:56:35,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 690 transitions, 12459 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 17:56:35,608 INFO L231 Difference]: Finished difference. Result has 502 places, 651 transitions, 10931 flow [2024-06-20 17:56:35,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10605, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10931, PETRI_PLACES=502, PETRI_TRANSITIONS=651} [2024-06-20 17:56:35,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-20 17:56:35,609 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 651 transitions, 10931 flow [2024-06-20 17:56:35,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-20 17:56:35,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:35,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:35,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 17:56:35,609 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)] === [2024-06-20 17:56:35,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:35,610 INFO L85 PathProgramCache]: Analyzing trace with hash 401538081, now seen corresponding path program 7 times [2024-06-20 17:56:35,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:35,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655188461] [2024-06-20 17:56:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:35,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:56:35,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:35,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655188461] [2024-06-20 17:56:35,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655188461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:35,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:35,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:56:35,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761916496] [2024-06-20 17:56:35,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:35,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:56:35,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:35,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:56:35,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:56:35,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:56:35,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 651 transitions, 10931 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:35,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:35,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:56:35,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:37,614 INFO L124 PetriNetUnfolderBase]: 3611/6169 cut-off events. [2024-06-20 17:56:37,614 INFO L125 PetriNetUnfolderBase]: For 1043529/1043529 co-relation queries the response was YES. [2024-06-20 17:56:37,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53721 conditions, 6169 events. 3611/6169 cut-off events. For 1043529/1043529 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 43314 event pairs, 651 based on Foata normal form. 10/6177 useless extension candidates. Maximal degree in co-relation 53505. Up to 5253 conditions per place. [2024-06-20 17:56:37,715 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 550 selfloop transitions, 127 changer transitions 0/685 dead transitions. [2024-06-20 17:56:37,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 685 transitions, 12469 flow [2024-06-20 17:56:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:56:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:56:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 17:56:37,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070460704607046 [2024-06-20 17:56:37,716 INFO L175 Difference]: Start difference. First operand has 502 places, 651 transitions, 10931 flow. Second operand 9 states and 224 transitions. [2024-06-20 17:56:37,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 685 transitions, 12469 flow [2024-06-20 17:56:45,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 685 transitions, 12266 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:56:45,233 INFO L231 Difference]: Finished difference. Result has 506 places, 653 transitions, 11070 flow [2024-06-20 17:56:45,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10728, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11070, PETRI_PLACES=506, PETRI_TRANSITIONS=653} [2024-06-20 17:56:45,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-20 17:56:45,234 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 653 transitions, 11070 flow [2024-06-20 17:56:45,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:45,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:45,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:45,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 17:56:45,234 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)] === [2024-06-20 17:56:45,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1813993771, now seen corresponding path program 8 times [2024-06-20 17:56:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:45,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263271524] [2024-06-20 17:56:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:45,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:56:45,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:45,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263271524] [2024-06-20 17:56:45,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263271524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:45,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:45,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:56:45,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246794877] [2024-06-20 17:56:45,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:45,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:56:45,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:45,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:56:45,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:56:45,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:56:45,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 653 transitions, 11070 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:45,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:45,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:56:45,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:47,370 INFO L124 PetriNetUnfolderBase]: 3619/6182 cut-off events. [2024-06-20 17:56:47,370 INFO L125 PetriNetUnfolderBase]: For 970157/970160 co-relation queries the response was YES. [2024-06-20 17:56:47,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53654 conditions, 6182 events. 3619/6182 cut-off events. For 970157/970160 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 43316 event pairs, 660 based on Foata normal form. 4/6183 useless extension candidates. Maximal degree in co-relation 53437. Up to 5335 conditions per place. [2024-06-20 17:56:47,472 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 546 selfloop transitions, 126 changer transitions 0/680 dead transitions. [2024-06-20 17:56:47,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 680 transitions, 12554 flow [2024-06-20 17:56:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:56:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:56:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 17:56:47,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 17:56:47,473 INFO L175 Difference]: Start difference. First operand has 506 places, 653 transitions, 11070 flow. Second operand 8 states and 197 transitions. [2024-06-20 17:56:47,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 680 transitions, 12554 flow [2024-06-20 17:56:54,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 680 transitions, 12248 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 17:56:54,397 INFO L231 Difference]: Finished difference. Result has 507 places, 655 transitions, 11103 flow [2024-06-20 17:56:54,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10768, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11103, PETRI_PLACES=507, PETRI_TRANSITIONS=655} [2024-06-20 17:56:54,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-20 17:56:54,397 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 655 transitions, 11103 flow [2024-06-20 17:56:54,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:54,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:54,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:54,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 17:56:54,398 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)] === [2024-06-20 17:56:54,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:54,398 INFO L85 PathProgramCache]: Analyzing trace with hash -92963129, now seen corresponding path program 9 times [2024-06-20 17:56:54,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:54,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813090336] [2024-06-20 17:56:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:54,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:56:54,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:54,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813090336] [2024-06-20 17:56:54,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813090336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:54,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:54,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:56:54,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485797241] [2024-06-20 17:56:54,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:54,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:56:54,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:56:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:56:54,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 17:56:54,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 655 transitions, 11103 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:54,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:54,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 17:56:54,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:56,533 INFO L124 PetriNetUnfolderBase]: 3627/6194 cut-off events. [2024-06-20 17:56:56,533 INFO L125 PetriNetUnfolderBase]: For 967836/967839 co-relation queries the response was YES. [2024-06-20 17:56:56,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53505 conditions, 6194 events. 3627/6194 cut-off events. For 967836/967839 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 43440 event pairs, 662 based on Foata normal form. 4/6195 useless extension candidates. Maximal degree in co-relation 53287. Up to 5347 conditions per place. [2024-06-20 17:56:56,632 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 545 selfloop transitions, 126 changer transitions 0/679 dead transitions. [2024-06-20 17:56:56,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 679 transitions, 12577 flow [2024-06-20 17:56:56,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:56:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:56:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 17:56:56,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 17:56:56,633 INFO L175 Difference]: Start difference. First operand has 507 places, 655 transitions, 11103 flow. Second operand 8 states and 194 transitions. [2024-06-20 17:56:56,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 679 transitions, 12577 flow